forked from enlightenment/efl
1308 lines
41 KiB
C
1308 lines
41 KiB
C
#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#ifdef HAVE_SYS_PRCTL_H
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# include <sys/prctl.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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# include <sys/wait.h>
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#endif
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#include <Efl.h>
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#include "Ecore.h"
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#include "ecore_private.h"
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#define MY_CLASS ECORE_EXE_CLASS
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#include "ecore_exe_private.h"
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/* TODO: Something to let people build a command line and does auto escaping -
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*
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* ecore_exe_snprintf()
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*
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* OR
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*
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* cmd = ecore_exe_comand_parameter_append(cmd, "firefox");
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* cmd = ecore_exe_comand_parameter_append(cmd, "http://www.foo.com/bar.html?baz=yes");
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* each parameter appended is one argument, and it gets escaped, quoted, and
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* appended with a preceding space. The first is the command off course.
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*/
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struct _ecore_exe_dead_exe
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{
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pid_t pid;
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char *cmd;
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};
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static inline void _ecore_exe_exec_it(const char *exe_cmd,
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Ecore_Exe_Flags flags);
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static Eina_Bool _ecore_exe_data_generic_handler(void *data,
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Ecore_Fd_Handler *fd_handler,
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Ecore_Exe_Flags flags);
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static Eina_Bool _ecore_exe_data_error_handler(void *data,
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Ecore_Fd_Handler *fd_handler);
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static Eina_Bool _ecore_exe_data_read_handler(void *data,
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Ecore_Fd_Handler *fd_handler);
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static Eina_Bool _ecore_exe_data_write_handler(void *data,
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Ecore_Fd_Handler *fd_handler);
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static void _ecore_exe_flush(Ecore_Exe *obj);
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static Ecore_Exe *_ecore_exe_is_it_alive(pid_t pid);
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static Eina_Bool _ecore_exe_make_sure_its_dead(void *data);
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static Eina_Bool _ecore_exe_make_sure_its_really_dead(void *data);
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static void _ecore_exe_dead_attach(Ecore_Exe *obj);
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static const char *shell = NULL;
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/* FIXME: This errno checking stuff should be put elsewhere for everybody to use.
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* For now it lives here though, just to make testing easier.
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*/
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static int _ecore_exe_check_errno(int result,
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const char *file,
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int line);
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#define E_IF_NO_ERRNO(result, foo, ok) \
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while (((ok) = _ecore_exe_check_errno((result) = (foo), __FILE__, __LINE__)) == -1) sleep(1); \
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if (ok)
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#define E_NO_ERRNO(result, foo, ok) \
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while (((ok) = _ecore_exe_check_errno((result) = (foo), __FILE__, __LINE__)) == -1) sleep(1)
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#define E_IF_NO_ERRNO_NOLOOP(result, foo, ok) \
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if (((ok) = _ecore_exe_check_errno((result) = (foo), __FILE__, __LINE__)))
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static int
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_ecore_exe_check_errno(int result,
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const char *file EINA_UNUSED,
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int line EINA_UNUSED)
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{
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int saved_errno = errno;
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if (result == -1)
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{
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perror("*** errno reports ");
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/* What is currently supported -
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*
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* pipe
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* EFAULT Argument is not valid.
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* EMFILE Too many file descriptors used by process.
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* ENFILE Too many open files by system.
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* read
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* EAGAIN No data now, try again.
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* EBADF This is not an fd that can be read.
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* EFAULT This is not a valid buffer.
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* EINTR Interupted by signal, try again.
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* EINVAL This is not an fd that can be read.
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* EIO I/O error.
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* EISDIR This is a directory, and cannot be read.
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* others Depending on what sort of thing we are reading from.
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* close
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* EBADF This is not an fd that can be closed.
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* EINTR Interupted by signal, try again.
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* EIO I/O error.
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* dup2
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* EBADF This is not an fd that can be dup2'ed.
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* EBUSY Race condition between open() and dup()
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* EINTR Interupted by signal, try again.
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* EMFILE Too many file descriptors used by process.
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* fcntl
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* EACCES, EAGAIN Locked or mapped by something else, try again later.
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* EBADF This is not an fd that can be fcntl'ed.
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* EDEADLK This will cause a deadlock.
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* EFAULT This is not a valid lock.
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* EINTR Interupted by signal, try again.
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* EINVAL This is not a valid arg.
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* EMFILE Too many file descriptors used by process.
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* ENOLCK Problem getting a lock.
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* EPERM Not allowed to do that.
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* fsync
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* EBADF This is not an fd that is open for writing.
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* EINVAL, EROFS This is not an fd that can be fsynced.
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* EIO I/O error.
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*
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* How to use it -
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* int ok = 0;
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* int result;
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*
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* E_IF_NO_ERRNO(result, foo(bar), ok)
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* {
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* E_IF_NO_ERRNO_NOLOOP(result, foo(bar), ok)
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* {
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* }
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* }
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*
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* if (!ok)
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* {
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* // Something failed, cleanup.
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* }
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*/
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switch (saved_errno)
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{
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case EACCES:
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case EAGAIN:
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case EINTR:
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{ /* Not now, try later. */
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ERR("*** Must try again in %s @%u.", file, line);
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result = -1;
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break;
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}
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case EMFILE:
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case ENFILE:
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case ENOLCK:
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{ /* Low on resources. */
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ERR("*** Low on resources in %s @%u.", file,
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line);
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result = 0;
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break;
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}
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case EIO:
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{ /* I/O error. */
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ERR("*** I/O error in %s @%u.", file, line);
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result = 0;
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break;
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}
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case EFAULT:
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case EBADF:
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case EINVAL:
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case EROFS:
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case EISDIR:
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case EDEADLK:
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case EPERM:
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case EBUSY:
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{ /* Programmer fucked up. */
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ERR("*** NAUGHTY PROGRAMMER!!!\n"
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"*** SPANK SPANK SPANK!!!\n"
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"*** Now go fix your code in %s @%u. Tut tut tut!",
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file, line);
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result = 0;
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break;
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}
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default:
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{ /* Unsupported errno code, please add this one. */
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ERR("*** NAUGHTY PROGRAMMER!!!\n"
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"*** SPANK SPANK SPANK!!!\n"
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"*** Unsupported errno code %d, please add this one.\n"
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"*** Now go fix your code in %s @%u, from %s @%u. Tut tut tut!",
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saved_errno, __FILE__, __LINE__, file, line);
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result = 0;
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break;
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}
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}
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}
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else /* Everything is fine. */
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result = 1;
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errno = saved_errno;
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return result;
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}
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static int run_pri = ECORE_EXE_PRIORITY_INHERIT;
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void
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_impl_ecore_exe_run_priority_set(int pri)
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{
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run_pri = pri;
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}
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int
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_impl_ecore_exe_run_priority_get(void)
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{
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return run_pri;
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}
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Eo *
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_impl_ecore_exe_efl_object_finalize(Eo *obj, Ecore_Exe_Data *exe)
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{
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int statusPipe[2] = { -1, -1 };
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int errorPipe[2] = { -1, -1 };
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int readPipe[2] = { -1, -1 };
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int writePipe[2] = { -1, -1 };
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int n = 0;
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int ok = 1;
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int result;
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if (!exe->cmd) return NULL;
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const char *exe_cmd = exe->cmd;
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Ecore_Exe_Flags flags = exe->flags;
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if ((flags & ECORE_EXE_PIPE_AUTO) && (!(flags & ECORE_EXE_PIPE_ERROR))
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&& (!(flags & ECORE_EXE_PIPE_READ)))
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/* We need something to auto pipe. */
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flags |= ECORE_EXE_PIPE_READ | ECORE_EXE_PIPE_ERROR;
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exe->child_fd_error = -1;
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exe->child_fd_read = -1;
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exe->child_fd_write = -1;
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exe->child_fd_error_x = -1;
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exe->child_fd_read_x = -1;
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exe->child_fd_write_x = -1;
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/* Create some pipes. */
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if (ok)
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{
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E_IF_NO_ERRNO_NOLOOP(result, pipe(statusPipe), ok)
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{
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}
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}
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if (ok && (flags & ECORE_EXE_PIPE_ERROR))
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{
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E_IF_NO_ERRNO_NOLOOP(result, pipe(errorPipe), ok)
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{
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exe->child_fd_error = errorPipe[0];
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exe->child_fd_error_x = errorPipe[1];
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}
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}
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if (ok && (flags & ECORE_EXE_PIPE_READ))
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{
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E_IF_NO_ERRNO_NOLOOP(result, pipe(readPipe), ok)
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{
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exe->child_fd_read = readPipe[0];
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exe->child_fd_read_x = readPipe[1];
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}
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}
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if (ok && (flags & ECORE_EXE_PIPE_WRITE))
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{
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E_IF_NO_ERRNO_NOLOOP(result, pipe(writePipe), ok)
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{
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exe->child_fd_write = writePipe[1];
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exe->child_fd_write_x = writePipe[0];
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}
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}
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if (ok)
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{
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pid_t pid = 0;
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volatile int vfork_exec_errno = 0;
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/* FIXME: I should double check this. After a quick look around, this is already done, but via a more modern method. */
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/* signal(SIGPIPE, SIG_IGN); We only want EPIPE on errors */
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pid = fork();
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if (pid == -1)
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{
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ERR("Failed to fork process");
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pid = 0;
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}
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else if (pid == 0) /* child */
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{
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#ifdef HAVE_SYSTEMD
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unsetenv("NOTIFY_SOCKET");
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#endif
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if (run_pri != ECORE_EXE_PRIORITY_INHERIT)
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{
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#ifdef PRIO_PROCESS
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if ((run_pri >= -20) && (run_pri <= 19))
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setpriority(PRIO_PROCESS, 0, run_pri);
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#else
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#warning "Your OS/libc does not provide PRIO_PROCESS (and possibly setpriority())"
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#warning "This is a POSIX-1.2001 standard and it is highly encouraged that you"
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#warning "Have support for this"
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#endif
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}
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/* dup2 STDERR, STDIN, and STDOUT. dup2() allegedly closes the
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* second pipe if it's open. On the other hand, there was the
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* Great FD Leak Scare of '06, so let's be paranoid. */
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if (ok && (flags & ECORE_EXE_PIPE_ERROR))
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{
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E_NO_ERRNO(result, close(STDERR_FILENO), ok);
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E_NO_ERRNO(result, dup2(errorPipe[1], STDERR_FILENO), ok);
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}
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if (ok && (flags & ECORE_EXE_PIPE_READ))
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{
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E_NO_ERRNO(result, close(STDOUT_FILENO), ok);
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E_NO_ERRNO(result, dup2(readPipe[1], STDOUT_FILENO), ok);
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}
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if (ok && (flags & ECORE_EXE_PIPE_WRITE))
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{
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E_NO_ERRNO(result, close(STDIN_FILENO), ok);
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E_NO_ERRNO(result, dup2(writePipe[0], STDIN_FILENO), ok);
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}
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if (ok)
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{
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/* Setup the status pipe. */
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E_NO_ERRNO(result, close(statusPipe[0]), ok);
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E_IF_NO_ERRNO(result, fcntl(statusPipe[1], F_SETFD, FD_CLOEXEC), ok) /* close on exec shows success */
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{
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/* Run the actual command. */
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_ecore_exe_exec_it(exe_cmd, flags); /* no return */
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}
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}
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/* Something went 'orribly wrong. */
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vfork_exec_errno = errno;
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/* Close the pipes. */
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if (flags & ECORE_EXE_PIPE_ERROR)
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E_NO_ERRNO(result, close(errorPipe[1]), ok);
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if (flags & ECORE_EXE_PIPE_READ)
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E_NO_ERRNO(result, close(readPipe[1]), ok);
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if (flags & ECORE_EXE_PIPE_WRITE)
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E_NO_ERRNO(result, close(writePipe[0]), ok);
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E_NO_ERRNO(result, close(statusPipe[1]), ok);
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_exit(-1);
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}
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else /* parent */
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{
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/* Close the unused pipes. */
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E_NO_ERRNO(result, close(statusPipe[1]), ok);
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/* FIXME: after having a good look at the current e fd
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* handling, investigate fcntl(dataPipe[x], F_SETSIG, ...) */
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/* FIXME: above F_SETSIG etc. - this is async SIGIO based IO
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* which is also linux specific so we probably don't want to
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* do this as long as select() is working fine. the only time
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* we really want to think of SIGIO async IO is when it all
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* actually works basically everywhere and we can turn all
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* IO into DMA async activities (i.e. you do a read() then
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* the read is complete not on return but when you get a
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* SIGIO - the read() just starts the transfer and it is
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* completed in the background by DMA (or whatever mechanism
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* the kernel choses)) */
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/* Wait for it to start executing. */
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/* FIXME: this doesn't seem very nice - we sit and block
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* waiting on a child process... even though it's just
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* the segment between the fork() and the exec) it just feels
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* wrong */
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for (;; )
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{
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char buf;
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E_NO_ERRNO(result, read(statusPipe[0], &buf, 1), ok);
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if (result == 0)
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{
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if (vfork_exec_errno != 0)
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{
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n = vfork_exec_errno;
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ERR("Could not start \"%s\"", exe_cmd);
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pid = 0;
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}
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break;
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}
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}
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/* Close the status pipe. */
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E_NO_ERRNO(result, close(statusPipe[0]), ok);
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}
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if (pid)
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{
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/* Setup the exe structure. */
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exe->start_bytes = -1;
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exe->end_bytes = -1;
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exe->start_lines = -1;
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exe->end_lines = -1;
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exe->pid = pid;
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exe->flags = flags;
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if (exe->cmd)
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{
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if (flags & ECORE_EXE_PIPE_ERROR) /* Setup the error stuff. */
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{
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E_IF_NO_ERRNO(result,
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fcntl(exe->child_fd_error, F_SETFL,
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O_NONBLOCK), ok) {
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}
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E_IF_NO_ERRNO(result,
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fcntl(exe->child_fd_error, F_SETFD,
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FD_CLOEXEC), ok) {
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}
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E_IF_NO_ERRNO(result,
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fcntl(exe->child_fd_error_x, F_SETFD,
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FD_CLOEXEC), ok) {
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}
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{
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exe->error_fd_handler =
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ecore_main_fd_handler_add(exe->child_fd_error,
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ECORE_FD_READ,
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_ecore_exe_data_error_handler,
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obj, NULL, NULL);
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if (!exe->error_fd_handler)
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ok = 0;
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}
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}
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if (ok && (flags & ECORE_EXE_PIPE_READ)) /* Setup the read stuff. */
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{
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E_IF_NO_ERRNO(result,
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fcntl(exe->child_fd_read, F_SETFL,
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O_NONBLOCK), ok) {
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}
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E_IF_NO_ERRNO(result,
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fcntl(exe->child_fd_read, F_SETFD,
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FD_CLOEXEC), ok) {
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}
|
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E_IF_NO_ERRNO(result,
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fcntl(exe->child_fd_read_x, F_SETFD,
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FD_CLOEXEC), ok) {
|
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}
|
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{
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exe->read_fd_handler =
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ecore_main_fd_handler_add(exe->child_fd_read,
|
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ECORE_FD_READ,
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_ecore_exe_data_read_handler,
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obj, NULL, NULL);
|
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if (!exe->read_fd_handler)
|
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ok = 0;
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}
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}
|
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if (ok && (flags & ECORE_EXE_PIPE_WRITE)) /* Setup the write stuff. */
|
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{
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E_IF_NO_ERRNO(result,
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fcntl(exe->child_fd_write, F_SETFL,
|
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O_NONBLOCK), ok) {
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}
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E_IF_NO_ERRNO(result,
|
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fcntl(exe->child_fd_write, F_SETFD,
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FD_CLOEXEC), ok) {
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}
|
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E_IF_NO_ERRNO(result,
|
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fcntl(exe->child_fd_write_x, F_SETFD,
|
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FD_CLOEXEC), ok) {
|
|
}
|
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{
|
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exe->write_fd_handler =
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ecore_main_fd_handler_add(exe->child_fd_write,
|
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ECORE_FD_WRITE,
|
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_ecore_exe_data_write_handler,
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obj, NULL, NULL);
|
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if (exe->write_fd_handler)
|
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ecore_main_fd_handler_active_set(exe->write_fd_handler, 0); /* Nothing to write to start with. */
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else
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ok = 0;
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}
|
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}
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|
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_ecore_exe_exes = eina_list_append(_ecore_exe_exes, obj);
|
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n = 0;
|
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}
|
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else
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ok = 0;
|
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}
|
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else
|
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ok = 0;
|
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}
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|
|
|
if (!ok) /* Something went wrong, so pull down everything. */
|
|
{
|
|
if (exe->pid) ecore_exe_terminate(obj);
|
|
IF_FN_DEL(ecore_exe_free, obj);
|
|
}
|
|
else
|
|
{
|
|
Ecore_Exe_Event_Add *e;
|
|
|
|
e = _ecore_exe_event_add_new();
|
|
if (e)
|
|
{
|
|
e->exe = obj;
|
|
/* Send the event. */
|
|
ecore_event_add(ECORE_EXE_EVENT_ADD, e,
|
|
_ecore_exe_event_add_free, NULL);
|
|
}
|
|
/* INF("Running as %d for %s.\n", exe->pid, exe->cmd); */
|
|
}
|
|
|
|
errno = n;
|
|
return obj;
|
|
}
|
|
|
|
Eina_Bool
|
|
_impl_ecore_exe_send(Ecore_Exe *obj EINA_UNUSED,
|
|
Ecore_Exe_Data *exe,
|
|
const void *data,
|
|
int size)
|
|
{
|
|
void *buf;
|
|
|
|
if (exe->child_fd_write == -1)
|
|
{
|
|
ERR("Ecore_Exe %p created without ECORE_EXE_PIPE_WRITE! "
|
|
"Cannot send %d bytes from %p", exe, size, data);
|
|
return EINA_FALSE;
|
|
}
|
|
|
|
buf = realloc(exe->write_data_buf, exe->write_data_size + size);
|
|
if (!buf) return EINA_FALSE;
|
|
|
|
exe->write_data_buf = buf;
|
|
memcpy((char *)exe->write_data_buf + exe->write_data_size, data, size);
|
|
exe->write_data_size += size;
|
|
|
|
if (exe->write_fd_handler)
|
|
ecore_main_fd_handler_active_set(exe->write_fd_handler, ECORE_FD_WRITE);
|
|
|
|
return EINA_TRUE;
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_auto_limits_set(Ecore_Exe *obj EINA_UNUSED,
|
|
Ecore_Exe_Data *exe,
|
|
int start_bytes,
|
|
int end_bytes,
|
|
int start_lines,
|
|
int end_lines)
|
|
{
|
|
/* FIXME: sanitize the input. */
|
|
exe->start_bytes = start_bytes;
|
|
exe->end_bytes = end_bytes;
|
|
exe->start_lines = start_lines;
|
|
exe->end_lines = end_lines;
|
|
|
|
/* FIXME: get this can of worms working.
|
|
*
|
|
* capture stderr & stdout internally
|
|
*
|
|
* raster and onefang keep moving the goal posts on this one. It started out as
|
|
* "show users the error output if an exe fails" and is rapidly approaching
|
|
* "alternative method of getting the data, poll vs event driven". Some serious
|
|
* thinking needs to be applied to this. Do we really want to go that far? If
|
|
* so, we should change the names. The basic design will probably remain the
|
|
* same which ever way we go. The constant goal post moving is probably due to
|
|
* generic design methods leading to feature creep as we inspired each other to
|
|
* more generic designs. It does seem like the closer we get to poll driven,
|
|
* the more issues and corner cases there are.
|
|
*
|
|
* Instead of doing the usual register an event handler thing, we are ecore_exe,
|
|
* we can take some short cuts. Don't send the events, just leave the exe buffers
|
|
* as is until the user asks for them, then return the event.
|
|
*
|
|
* start = 0, end = 0; clogged arteries get flushed, everything is ignored.
|
|
* start = -1, end = -1; clogged arteries get transferred to internal buffers. Actually, either == -1 means buffer everything.
|
|
* start = X, end = 0; buffer first X out of clogged arteries, flush and ignore rest.
|
|
* start = 0, end = X; circular buffer X
|
|
* start = X, end = Y; buffer first X out of clogged arteries, circular buffer Y from beginning.
|
|
*
|
|
* bytes vs lines, which ever one reaches the limit first.
|
|
* Before we go beyond the start+end limit, leave the end buffer empty, and store both in the start buffer, coz they overlap.
|
|
* After we pass the the start+end limit, insert "\n...\n" at the end of the start buffer, copy the rest to the end buffer, then store in the end buffer.
|
|
*
|
|
* Other issues -
|
|
* Spank programmer for polling data if polling is not turned on.
|
|
* Spank programmer for setting up event callbacks if polling is turned on.
|
|
* Spank programmer for freeing the event data if it came from the event system, as that autofrees.
|
|
* Spank the programmer if they try to set the limits bigger than what has been gathered & ignored already, coz they just lost data.
|
|
* Spank onefang and raster for opening this can of worms.
|
|
* Should we have separate out/err limits?
|
|
* Should we remove from the internal buffer the data that was delivered already?
|
|
* If so, what to do about limits, start, and end? They could loose their meaning.
|
|
*/
|
|
}
|
|
|
|
Ecore_Exe_Event_Data *
|
|
_impl_ecore_exe_event_data_get(Ecore_Exe *obj,
|
|
Ecore_Exe_Data *exe,
|
|
Ecore_Exe_Flags flags)
|
|
{
|
|
Ecore_Exe_Event_Data *e = NULL;
|
|
int is_buffered = 0;
|
|
unsigned char *inbuf;
|
|
int inbuf_num;
|
|
|
|
/* Sort out what sort of event we are. */
|
|
if (flags & ECORE_EXE_PIPE_READ)
|
|
{
|
|
flags = ECORE_EXE_PIPE_READ;
|
|
if (exe->flags & ECORE_EXE_PIPE_READ_LINE_BUFFERED)
|
|
is_buffered = 1;
|
|
}
|
|
else
|
|
{
|
|
flags = ECORE_EXE_PIPE_ERROR;
|
|
if (exe->flags & ECORE_EXE_PIPE_ERROR_LINE_BUFFERED)
|
|
is_buffered = 1;
|
|
}
|
|
|
|
/* Get the data. */
|
|
if (flags & ECORE_EXE_PIPE_READ)
|
|
{
|
|
inbuf = exe->read_data_buf;
|
|
inbuf_num = exe->read_data_size;
|
|
exe->read_data_buf = NULL;
|
|
exe->read_data_size = 0;
|
|
}
|
|
else
|
|
{
|
|
inbuf = exe->error_data_buf;
|
|
inbuf_num = exe->error_data_size;
|
|
exe->error_data_buf = NULL;
|
|
exe->error_data_size = 0;
|
|
}
|
|
|
|
e = calloc(1, sizeof(Ecore_Exe_Event_Data));
|
|
if (e)
|
|
{
|
|
e->exe = obj;
|
|
e->data = inbuf;
|
|
e->size = inbuf_num;
|
|
|
|
if (is_buffered) /* Deal with line buffering. */
|
|
{
|
|
int max = 0;
|
|
int count = 0;
|
|
int i;
|
|
int last = 0;
|
|
char *c;
|
|
|
|
c = (char *)inbuf;
|
|
for (i = 0; i < inbuf_num; i++) /* Find the lines. */
|
|
{
|
|
if (inbuf[i] == '\n')
|
|
{
|
|
if (count >= max)
|
|
{
|
|
/* In testing, the lines seem to arrive in batches of 500 to 1000 lines at most, roughly speaking. */
|
|
max += 10; /* FIXME: Maybe keep track of the largest number of lines ever sent, and add half that many instead of 10. */
|
|
e->lines = realloc(e->lines, sizeof(Ecore_Exe_Event_Data_Line) * (max + 1)); /* Allow room for the NULL termination. */
|
|
}
|
|
/* raster said to leave the line endings as line endings, however -
|
|
* This is line buffered mode, we are not dealing with binary here, but lines.
|
|
* If we are not dealing with binary, we must be dealing with ASCII, unicode, or some other text format.
|
|
* Thus the user is most likely gonna deal with this text as strings.
|
|
* Thus the user is most likely gonna pass this data to str functions.
|
|
* rasters way - the endings are always gonna be '\n'; onefangs way - they will always be '\0'
|
|
* We are handing them the string length as a convenience.
|
|
* Thus if they really want it in raw format, they can e->lines[i].line[e->lines[i].size - 1] = '\n'; easily enough.
|
|
* In the default case, we can do this conversion quicker than the user can, as we already have the index and pointer.
|
|
* Let's make it easy on them to use these as standard C strings.
|
|
*
|
|
* onefang is proud to announce that he has just set a new personal record for the
|
|
* most over documentation of a simple assignment statement. B-)
|
|
*/
|
|
inbuf[i] = '\0';
|
|
e->lines[count].line = c;
|
|
e->lines[count].size = i - last;
|
|
last = i + 1;
|
|
c = (char *)&inbuf[last];
|
|
count++;
|
|
}
|
|
}
|
|
if (i > last) /* Partial line left over, save it for next time. */
|
|
{
|
|
if (count != 0) e->size = last;
|
|
if (flags & ECORE_EXE_PIPE_READ)
|
|
{
|
|
exe->read_data_size = i - last;
|
|
exe->read_data_buf = malloc(exe->read_data_size);
|
|
memcpy(exe->read_data_buf, c, exe->read_data_size);
|
|
}
|
|
else
|
|
{
|
|
exe->error_data_size = i - last;
|
|
exe->error_data_buf = malloc(exe->error_data_size);
|
|
memcpy(exe->error_data_buf, c, exe->error_data_size);
|
|
}
|
|
}
|
|
if (count == 0) /* No lines to send, cancel the event. */
|
|
{
|
|
_ecore_exe_event_exe_data_free(NULL, e);
|
|
e = NULL;
|
|
}
|
|
else /* NULL terminate the array, so that people know where the end is. */
|
|
{
|
|
e->lines[count].line = NULL;
|
|
e->lines[count].size = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return e;
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_efl_object_destructor(Eo *obj, Ecore_Exe_Data *exe)
|
|
{
|
|
void *data;
|
|
int ok = 0;
|
|
int result;
|
|
|
|
data = exe->data;
|
|
|
|
if (exe->pre_free_cb)
|
|
exe->pre_free_cb(data, obj);
|
|
|
|
if (exe->doomsday_clock)
|
|
{
|
|
struct _ecore_exe_dead_exe *dead;
|
|
|
|
ecore_timer_del(exe->doomsday_clock);
|
|
exe->doomsday_clock = NULL;
|
|
dead = exe->doomsday_clock_dead;
|
|
if (dead)
|
|
{
|
|
IF_FREE(dead->cmd);
|
|
free(dead);
|
|
exe->doomsday_clock_dead = NULL;
|
|
}
|
|
}
|
|
IF_FN_DEL(ecore_main_fd_handler_del, exe->write_fd_handler);
|
|
IF_FN_DEL(ecore_main_fd_handler_del, exe->read_fd_handler);
|
|
IF_FN_DEL(ecore_main_fd_handler_del, exe->error_fd_handler);
|
|
if (exe->child_fd_write_x != -1)
|
|
E_NO_ERRNO(result, close(exe->child_fd_write_x), ok);
|
|
if (exe->child_fd_read_x != -1)
|
|
E_NO_ERRNO(result, close(exe->child_fd_read_x), ok);
|
|
if (exe->child_fd_error_x != -1)
|
|
E_NO_ERRNO(result, close(exe->child_fd_error_x), ok);
|
|
if (exe->child_fd_write != -1)
|
|
E_NO_ERRNO(result, close(exe->child_fd_write), ok);
|
|
if (exe->child_fd_read != -1)
|
|
E_NO_ERRNO(result, close(exe->child_fd_read), ok);
|
|
if (exe->child_fd_error != -1)
|
|
E_NO_ERRNO(result, close(exe->child_fd_error), ok);
|
|
IF_FREE(exe->write_data_buf);
|
|
IF_FREE(exe->read_data_buf);
|
|
IF_FREE(exe->error_data_buf);
|
|
IF_FREE(exe->cmd);
|
|
|
|
_ecore_exe_exes = eina_list_remove(_ecore_exe_exes, obj);
|
|
IF_FREE(exe->tag);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_pause(Eo *obj EINA_UNUSED, Ecore_Exe_Data *exe)
|
|
{
|
|
kill(exe->pid, SIGSTOP);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_continue(Eo *obj EINA_UNUSED, Ecore_Exe_Data *exe)
|
|
{
|
|
kill(exe->pid, SIGCONT);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_interrupt(Ecore_Exe *obj, Ecore_Exe_Data *exe)
|
|
{
|
|
_ecore_exe_dead_attach(obj);
|
|
kill(exe->pid, SIGINT);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_quit(Ecore_Exe *obj, Ecore_Exe_Data *exe)
|
|
{
|
|
_ecore_exe_dead_attach(obj);
|
|
kill(exe->pid, SIGQUIT);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_terminate(Ecore_Exe *obj, Ecore_Exe_Data *exe)
|
|
{
|
|
_ecore_exe_dead_attach(obj);
|
|
INF("Sending TERM signal to %s (%d).", exe->cmd, exe->pid);
|
|
kill(exe->pid, SIGTERM);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_kill(Ecore_Exe *obj EINA_UNUSED, Ecore_Exe_Data *exe)
|
|
{
|
|
struct _ecore_exe_dead_exe *dead;
|
|
dead = calloc(1, sizeof(struct _ecore_exe_dead_exe));
|
|
if (dead)
|
|
{
|
|
dead->pid = exe->pid;
|
|
dead->cmd = strdup(exe->cmd);
|
|
IF_FN_DEL(ecore_timer_del, exe->doomsday_clock);
|
|
exe->doomsday_clock =
|
|
ecore_timer_add(10.0, _ecore_exe_make_sure_its_really_dead, dead);
|
|
}
|
|
|
|
INF("Sending KILL signal to %s (%d).", exe->cmd, exe->pid);
|
|
kill(exe->pid, SIGKILL);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_signal(Ecore_Exe *obj EINA_UNUSED,
|
|
Ecore_Exe_Data *exe,
|
|
int num)
|
|
{
|
|
if (num == 1)
|
|
kill(exe->pid, SIGUSR1);
|
|
else if (num == 2)
|
|
kill(exe->pid, SIGUSR2);
|
|
}
|
|
|
|
void
|
|
_impl_ecore_exe_hup(Ecore_Exe *obj EINA_UNUSED, Ecore_Exe_Data *exe)
|
|
{
|
|
kill(exe->pid, SIGHUP);
|
|
}
|
|
|
|
static Ecore_Exe *
|
|
_ecore_exe_is_it_alive(pid_t pid)
|
|
{
|
|
Ecore_Exe *exe = NULL;
|
|
|
|
/* FIXME: There is no nice, safe, OS independent way to tell if a
|
|
* particular PID is still alive. I have written code to do so
|
|
* for my urunlevel busybox applet (http://urunlevel.sourceforge.net/),
|
|
* but it's for linux only, and still not guaranteed.
|
|
*
|
|
* So for now, we just check that a valid Ecore_Exe structure
|
|
* exists for it. Even that is not a guarantee, as the structure
|
|
* can be freed without killing the process.
|
|
*
|
|
* I think we can safely put exe's into two categories, those users
|
|
* that care about the life of the exe, and the run and forget type.
|
|
* The run and forget type starts up the exe, then free's the
|
|
* Ecore_Exe structure straight away. They can never call any of
|
|
* the functions that can call this, so we don't worry about them.
|
|
*
|
|
* Those user's that care about the life of exe's will keep the
|
|
* Ecore_Exe structure around, terminate them eventually, or
|
|
* register for exit events. For these ones the assumption
|
|
* that valid Ecore_Exe struct == live exe is almost valid.
|
|
*
|
|
* I will probably copy my urunlevel code into here someday.
|
|
*/
|
|
exe = _ecore_exe_find(pid);
|
|
|
|
return exe;
|
|
}
|
|
|
|
static Eina_Bool
|
|
_ecore_exe_make_sure_its_dead(void *data)
|
|
{
|
|
struct _ecore_exe_dead_exe *dead;
|
|
|
|
dead = data;
|
|
if (dead)
|
|
{
|
|
Ecore_Exe *obj = NULL;
|
|
|
|
if ((obj = _ecore_exe_is_it_alive(dead->pid)))
|
|
{
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
if (dead->cmd)
|
|
INF("Sending KILL signal to allegedly dead %s (%d).",
|
|
dead->cmd, dead->pid);
|
|
else
|
|
INF("Sending KILL signal to allegedly dead PID %d.",
|
|
dead->pid);
|
|
exe->doomsday_clock =
|
|
ecore_timer_add(10.0, _ecore_exe_make_sure_its_really_dead,
|
|
dead);
|
|
kill(dead->pid, SIGKILL);
|
|
}
|
|
else
|
|
{
|
|
IF_FREE(dead->cmd);
|
|
free(dead);
|
|
}
|
|
}
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|
|
|
|
static Eina_Bool
|
|
_ecore_exe_make_sure_its_really_dead(void *data)
|
|
{
|
|
struct _ecore_exe_dead_exe *dead;
|
|
|
|
dead = data;
|
|
if (dead)
|
|
{
|
|
Ecore_Exe *obj = NULL;
|
|
|
|
if ((obj = _ecore_exe_is_it_alive(dead->pid)))
|
|
{
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
ERR("RUN! The zombie wants to eat your brains! And your CPU!");
|
|
if (dead->cmd)
|
|
INF("%s (%d) is not really dead.", dead->cmd, dead->pid);
|
|
else
|
|
INF("PID %d is not really dead.", dead->pid);
|
|
exe->doomsday_clock = NULL;
|
|
}
|
|
IF_FREE(dead->cmd);
|
|
free(dead);
|
|
}
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|
|
|
|
Ecore_Timer *
|
|
_ecore_exe_doomsday_clock_get(Ecore_Exe *obj)
|
|
{
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
return exe->doomsday_clock;
|
|
}
|
|
|
|
void
|
|
_ecore_exe_doomsday_clock_set(Ecore_Exe *obj,
|
|
Ecore_Timer *dc)
|
|
{
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
exe->doomsday_clock = dc;
|
|
}
|
|
|
|
static inline void
|
|
_ecore_exe_exec_it(const char *exe_cmd,
|
|
Ecore_Exe_Flags flags)
|
|
{
|
|
char use_sh = 1;
|
|
char *buf = NULL;
|
|
char **args = NULL;
|
|
int save_errno = 0;
|
|
|
|
/* So what is this doing?
|
|
*
|
|
* We are trying to avoid wrapping the exe call with /bin/sh -c.
|
|
* We conservatively search for certain shell meta characters,
|
|
* If we don't find them, we can call the exe directly.
|
|
*/
|
|
if (!strpbrk(exe_cmd, "|&;<>()$`\\\"'*?#"))
|
|
{
|
|
char *token;
|
|
char pre_command = 1;
|
|
int num_tokens = 0;
|
|
int len;
|
|
|
|
len = strlen(exe_cmd);
|
|
buf = alloca(len + 1);
|
|
strcpy(buf, exe_cmd);
|
|
buf[len] = 0;
|
|
|
|
token = strtok(buf, " \t\n\v");
|
|
while (token)
|
|
{
|
|
if (token[0] == '~')
|
|
break;
|
|
if (pre_command)
|
|
{
|
|
if (token[0] == '[')
|
|
break;
|
|
if (strchr(token, '='))
|
|
break;
|
|
else
|
|
pre_command = 0;
|
|
}
|
|
num_tokens++;
|
|
token = strtok(NULL, " \t\n\v");
|
|
}
|
|
if ((!token) && (num_tokens))
|
|
{
|
|
int i = 0;
|
|
|
|
len = strlen(exe_cmd);
|
|
buf = alloca(len + 1);
|
|
strcpy(buf, exe_cmd);
|
|
buf[len] = 0;
|
|
|
|
token = strtok(buf, " \t\n\v");
|
|
use_sh = 0;
|
|
args = alloca((num_tokens + 1) * sizeof(char *));
|
|
for (i = 0; i < num_tokens; i++)
|
|
{
|
|
if (token)
|
|
args[i] = token;
|
|
token = strtok(NULL, " \t\n\v");
|
|
}
|
|
args[num_tokens] = NULL;
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_SYS_PRCTL_H
|
|
if ((flags & ECORE_EXE_TERM_WITH_PARENT))
|
|
{
|
|
prctl(PR_SET_PDEATHSIG, SIGTERM);
|
|
}
|
|
#endif
|
|
|
|
if (!(flags & ECORE_EXE_NOT_LEADER)) setsid();
|
|
if ((flags & ECORE_EXE_USE_SH))
|
|
{
|
|
errno = 0;
|
|
execl("/bin/sh", "/bin/sh", "-c", exe_cmd, (char *)NULL);
|
|
}
|
|
else if (use_sh) /* We have to use a shell to run this. */
|
|
{
|
|
if (!shell) /* Find users preferred shell. */
|
|
{
|
|
#if defined(HAVE_GETUID) && defined(HAVE_GETEUID)
|
|
if (getuid() == geteuid())
|
|
#endif
|
|
shell = getenv("SHELL");
|
|
if (!shell)
|
|
shell = "/bin/sh";
|
|
}
|
|
errno = 0;
|
|
execl(shell, shell, "-c", exe_cmd, (char *)NULL);
|
|
}
|
|
else
|
|
{ /* We can run this directly. */
|
|
if (!args)
|
|
{
|
|
ERR("arg[0] is NULL!");
|
|
return;
|
|
}
|
|
errno = 0;
|
|
if (args[0]) execvp(args[0], args);
|
|
}
|
|
|
|
save_errno = errno;
|
|
errno = save_errno;
|
|
return;
|
|
}
|
|
|
|
static Eina_Bool
|
|
_ecore_exe_data_generic_handler(void *data,
|
|
Ecore_Fd_Handler *fd_handler,
|
|
Ecore_Exe_Flags flags)
|
|
{
|
|
Ecore_Exe *obj = data;
|
|
int child_fd;
|
|
int event_type;
|
|
const Efl_Event_Description *eo_event = NULL;
|
|
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
|
|
/* Sort out what sort of handler we are. */
|
|
if (flags & ECORE_EXE_PIPE_READ)
|
|
{
|
|
flags = ECORE_EXE_PIPE_READ;
|
|
event_type = ECORE_EXE_EVENT_DATA;
|
|
eo_event = ECORE_EXE_EVENT_DATA_GET;
|
|
child_fd = exe->child_fd_read;
|
|
}
|
|
else
|
|
{
|
|
flags = ECORE_EXE_PIPE_ERROR;
|
|
event_type = ECORE_EXE_EVENT_ERROR;
|
|
eo_event = ECORE_EXE_EVENT_DATA_ERROR;
|
|
child_fd = exe->child_fd_error;
|
|
}
|
|
|
|
if ((fd_handler)
|
|
&& (ecore_main_fd_handler_active_get(fd_handler, ECORE_FD_READ)))
|
|
{
|
|
unsigned char *inbuf, *temp;
|
|
int inbuf_num;
|
|
|
|
/* Get any left over data from last time. */
|
|
if (flags & ECORE_EXE_PIPE_READ)
|
|
{
|
|
inbuf = exe->read_data_buf;
|
|
inbuf_num = exe->read_data_size;
|
|
exe->read_data_buf = NULL;
|
|
exe->read_data_size = 0;
|
|
}
|
|
else
|
|
{
|
|
inbuf = exe->error_data_buf;
|
|
inbuf_num = exe->error_data_size;
|
|
exe->error_data_buf = NULL;
|
|
exe->error_data_size = 0;
|
|
}
|
|
|
|
for (;; )
|
|
{
|
|
int num, lost_exe;
|
|
char buf[READBUFSIZ];
|
|
|
|
lost_exe = 0;
|
|
errno = 0;
|
|
if ((num = read(child_fd, buf, READBUFSIZ)) < 1)
|
|
{
|
|
/* FIXME: SPEED/SIZE TRADE OFF - add a smaller READBUFSIZE
|
|
* (currently 64k) to inbuf, use that instead of buf, and
|
|
* save ourselves a memcpy(). */
|
|
lost_exe = ((errno == EIO) ||
|
|
(errno == EBADF) ||
|
|
(errno == EPIPE) ||
|
|
(errno == EINVAL) || (errno == ENOSPC));
|
|
if ((errno != EAGAIN) && (errno != EINTR))
|
|
perror("_ecore_exe_generic_handler() read problem ");
|
|
}
|
|
if (num > 0) /* data got read. */
|
|
{
|
|
temp = inbuf;
|
|
inbuf = realloc(inbuf, inbuf_num + num);
|
|
if (inbuf)
|
|
{
|
|
memcpy(inbuf + inbuf_num, buf, num);
|
|
inbuf_num += num;
|
|
}
|
|
else // realloc fails and returns NULL.
|
|
inbuf = temp;
|
|
}
|
|
else
|
|
{ /* No more data to read. */
|
|
if (inbuf)
|
|
{
|
|
Ecore_Exe_Event_Data *e;
|
|
|
|
/* Stash the data away for later. */
|
|
if (flags & ECORE_EXE_PIPE_READ)
|
|
{
|
|
exe->read_data_buf = inbuf;
|
|
exe->read_data_size = inbuf_num;
|
|
}
|
|
else
|
|
{
|
|
exe->error_data_buf = inbuf;
|
|
exe->error_data_size = inbuf_num;
|
|
}
|
|
|
|
if (!(exe->flags & ECORE_EXE_PIPE_AUTO))
|
|
{
|
|
e = ecore_exe_event_data_get(obj, flags);
|
|
if (e) /* Send the event. */
|
|
{
|
|
ecore_event_add(event_type, e,
|
|
_ecore_exe_event_exe_data_free,
|
|
NULL);
|
|
efl_event_callback_legacy_call(obj, eo_event, e);
|
|
}
|
|
}
|
|
}
|
|
if (lost_exe)
|
|
{
|
|
if (flags & ECORE_EXE_PIPE_READ)
|
|
{
|
|
if (exe->read_data_size)
|
|
INF("There are %d bytes left unsent from the dead exe %s.",
|
|
exe->read_data_size, exe->cmd);
|
|
}
|
|
else
|
|
{
|
|
if (exe->error_data_size)
|
|
INF("There are %d bytes left unsent from the dead exe %s.",
|
|
exe->error_data_size, exe->cmd);
|
|
}
|
|
/* Thought about this a bit. If the exe has actually
|
|
* died, this won't do any harm as it must have died
|
|
* recently and the pid has not had a chance to recycle.
|
|
* It is also a paranoid catchall, coz the usual ecore_signal
|
|
* mechanism should kick in. But let's give it a good
|
|
* kick in the head anyway.
|
|
*/
|
|
ecore_exe_terminate(obj);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
|
|
static Eina_Bool
|
|
_ecore_exe_data_error_handler(void *data,
|
|
Ecore_Fd_Handler *fd_handler)
|
|
{
|
|
return _ecore_exe_data_generic_handler(data, fd_handler,
|
|
ECORE_EXE_PIPE_ERROR);
|
|
}
|
|
|
|
static Eina_Bool
|
|
_ecore_exe_data_read_handler(void *data,
|
|
Ecore_Fd_Handler *fd_handler)
|
|
{
|
|
return _ecore_exe_data_generic_handler(data, fd_handler,
|
|
ECORE_EXE_PIPE_READ);
|
|
}
|
|
|
|
static Eina_Bool
|
|
_ecore_exe_data_write_handler(void *data,
|
|
Ecore_Fd_Handler *fd_handler EINA_UNUSED)
|
|
{
|
|
Ecore_Exe *obj = data;
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
|
|
if ((exe->write_fd_handler) &&
|
|
(ecore_main_fd_handler_active_get
|
|
(exe->write_fd_handler, ECORE_FD_WRITE)))
|
|
_ecore_exe_flush(obj);
|
|
|
|
/* If we have sent all there is to send, and we need to close the pipe, then close it. */
|
|
if ((exe->close_stdin == 1)
|
|
&& (exe->write_data_size == exe->write_data_offset))
|
|
{
|
|
int ok = 0;
|
|
int result;
|
|
|
|
INF("Closing stdin for %s", exe->cmd);
|
|
/* if (exe->child_fd_write != -1) E_NO_ERRNO(result, fsync(exe->child_fd_write), ok); This a) doesn't work, and b) isn't needed. */
|
|
IF_FN_DEL(ecore_main_fd_handler_del, exe->write_fd_handler);
|
|
if (exe->child_fd_write != -1)
|
|
E_NO_ERRNO(result, close(exe->child_fd_write), ok);
|
|
exe->child_fd_write = -1;
|
|
IF_FREE(exe->write_data_buf);
|
|
}
|
|
|
|
return ECORE_CALLBACK_RENEW;
|
|
}
|
|
|
|
static void
|
|
_ecore_exe_flush(Ecore_Exe *obj)
|
|
{
|
|
int count;
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
|
|
/* check whether we need to write anything at all. */
|
|
if ((exe->child_fd_write == -1) || (!exe->write_data_buf))
|
|
return;
|
|
if (exe->write_data_size == exe->write_data_offset)
|
|
return;
|
|
|
|
count = write(exe->child_fd_write,
|
|
(char *)exe->write_data_buf + exe->write_data_offset,
|
|
exe->write_data_size - exe->write_data_offset);
|
|
if (count < 1)
|
|
{
|
|
if (errno == EIO || errno == EBADF || errno == EPIPE || errno == EINVAL || errno == ENOSPC) /* we lost our exe! */
|
|
{
|
|
ecore_exe_terminate(obj);
|
|
if (exe->write_fd_handler)
|
|
ecore_main_fd_handler_active_set(exe->write_fd_handler, 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
exe->write_data_offset += count;
|
|
if (exe->write_data_offset >= exe->write_data_size) /* Nothing left to write, clean up. */
|
|
{
|
|
exe->write_data_size = 0;
|
|
exe->write_data_offset = 0;
|
|
IF_FREE(exe->write_data_buf);
|
|
if (exe->write_fd_handler)
|
|
ecore_main_fd_handler_active_set(exe->write_fd_handler, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
_ecore_exe_dead_attach(Ecore_Exe *obj)
|
|
{
|
|
struct _ecore_exe_dead_exe *dead;
|
|
Ecore_Exe_Data *exe = efl_data_scope_get(obj, MY_CLASS);
|
|
|
|
if (exe->doomsday_clock_dead) return;
|
|
dead = calloc(1, sizeof(struct _ecore_exe_dead_exe));
|
|
if (dead)
|
|
{
|
|
dead->pid = exe->pid;
|
|
if (exe->cmd) dead->cmd = strdup(exe->cmd);
|
|
IF_FN_DEL(ecore_timer_del, exe->doomsday_clock);
|
|
exe->doomsday_clock =
|
|
ecore_timer_add(10.0, _ecore_exe_make_sure_its_dead, dead);
|
|
exe->doomsday_clock_dead = dead;
|
|
}
|
|
}
|