2003-09-23 01:09:32 -07:00
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#include "ecore_private.h"
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#include "Ecore.h"
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2004-10-20 10:51:29 -07:00
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#ifndef WIN32
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2003-09-23 01:09:32 -07:00
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static Ecore_Exe *exes = NULL;
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/**
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2004-09-21 21:25:35 -07:00
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* @defgroup Ecore_Exe_Basic_Group Process Spawning Functions
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*
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* Functions that deal with spawned processes.
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*/
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/**
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* Spawns a child process.
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*
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* This function forks and runs the given command using @c /bin/sh.
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*
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* Note that the process handle is only valid until a child process
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* terminated event is received. After all handlers for the child process
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* terminated event have been called, the handle will be freed by Ecore.
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2003-09-23 01:09:32 -07:00
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*
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2004-09-21 21:25:35 -07:00
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* @param exe_cmd The command to run with @c /bin/sh.
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* @param data Data to attach to the returned process handle.
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* @return A process handle to the spawned process.
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* @ingroup Ecore_Exe_Basic_Group
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2003-09-23 01:09:32 -07:00
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*/
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Ecore_Exe *
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ecore_exe_run(const char *exe_cmd, const void *data)
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{
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Ecore_Exe *exe;
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pid_t pid;
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if (!exe_cmd) return NULL;
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pid = fork();
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if (pid)
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{
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exe = calloc(1, sizeof(Ecore_Exe));
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if (!exe)
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{
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kill(pid, SIGKILL);
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return NULL;
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}
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ECORE_MAGIC_SET(exe, ECORE_MAGIC_EXE);
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exe->pid = pid;
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exe->data = (void *)data;
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2005-08-30 03:05:27 -07:00
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exes = _ecore_list2_append(exes, exe);
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2003-09-23 01:09:32 -07:00
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return exe;
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}
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setsid();
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The const char *arg and subsequent ellipses in the execl, execlp, and
execle functions can be thought of as arg0, arg1, ..., argn. Together
they describe a list of one or more pointers to null-terminated strings
that represent the argument list available to the executed program.
The first argument, by convention, should point to the file name asso-
ciated with the file being executed. The list of arguments must be
terminated by a NULL pointer, and, since these are variadic functions,
this pointer must be cast (char *) NULL.
SVN revision: 14411
2005-04-27 07:30:36 -07:00
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execl("/bin/sh", "/bin/sh", "-c", exe_cmd, (char *)NULL);
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2005-07-06 20:31:34 -07:00
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exit(127);
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2003-09-23 01:09:32 -07:00
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return NULL;
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}
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2005-10-24 01:53:50 -07:00
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/**
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* Spawns a child process with its stdin/out available for communication.
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*
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* This function does the same thing as ecore_exe_run(), but also makes the
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* standard in and/or out from the child process available for reading or
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* writing. To write use ecore_exe_pipe_write(). To read listen to
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* ECORE_EVENT_EXE_DATA events (set up a handler). Ecore may buffer read data
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* until a newline character if asked to wit the @p flags. All data will be
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* included in the events (newlines will not be stripped). This will only
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* happen if the process is run with ECORE_EXE_PIPE_READ enabled in the flags.
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*
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* @param exe_cmd The command to run with @c /bin/sh.
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* @param flags The flag parameters for how to deal with inter-process I/O
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* @param data Data to attach to the returned process handle.
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* @return A process handle to the spawned process.
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* @ingroup Ecore_Exe_Basic_Group
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*/
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Ecore_Exe *
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ecore_exe_pipe_run(const char *exe_cmd, Ecore_Exe_Flags flags, const void *data)
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{
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Ecore_Exe *exe;
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pid_t pid;
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/* FIXME:
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* if flags does not have read or write in them - just execute using
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* ecore_exe_run() as normal.
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* pipe() to creeate pipes (as necessary accoring to flags)
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* in child close() parent side of pipes
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* in child dup2() stdin, stdout (according to flags as necessary)
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* in parent (here) close() child side of pipes
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* set up fd's in ecore_exe struct FIXME - add to struct
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* set up fd handler in ecore_exe struct
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* see ecore_con for code and examples on this (fd's there are to a socket
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* but otherwise work the same as here). the ECORE_EVENT_EXE_EXIT event
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* aces like the client del event from ecore_con - signalling that the
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* connection is closed. once this event has been handled the child
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* ecore_exe struct is freed automatically and is no longer valid.
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2005-10-24 02:02:46 -07:00
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*
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* when fd handlers report data - if line buffering is nto enabled instantly
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* copy data to a exe data event struct and add the event like ecore_con. if
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* line buffering is enabled, parse new data block for a \n. if there is
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* none, then simply append to read buf. if there are 1 or more, append
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* until, and including the first \n, to the existing read ubf (if any) then
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* generate data event for that. repeat for each other \n found until no \n
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* chars are left, then take trailing data (if any) and put in read buf
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* waiting for more data.
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*
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2005-10-24 01:53:50 -07:00
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*/
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if (!exe_cmd) return NULL;
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pid = fork();
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if (pid)
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{
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exe = calloc(1, sizeof(Ecore_Exe));
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if (!exe)
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{
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kill(pid, SIGKILL);
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return NULL;
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}
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ECORE_MAGIC_SET(exe, ECORE_MAGIC_EXE);
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exe->pid = pid;
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exe->data = (void *)data;
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exes = _ecore_list2_append(exes, exe);
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return exe;
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}
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setsid();
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execl("/bin/sh", "/bin/sh", "-c", exe_cmd, (char *)NULL);
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exit(127);
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return NULL;
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}
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/**
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* Writes data to the given child process which it recieves on stdin.
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*
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* This function writes to a child processes standard in, with unlimited
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* buffering. This call will never block. It may fail if the system runs out
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* of memory.
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*
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* @param exe The child process to write to
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* @param data The data to write
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* @param size The size of the data to write, in bytes
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* @return 1 if successful, 0 on failure.
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* @ingroup Ecore_Exe_Basic_Group
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*/
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int
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ecore_exe_pipe_write(Ecore_Exe *exe, void *data, int size)
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{
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/* FIXME: add data to buffer and flag fd handlers to wake up when write
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* to child fd is available, and when it is, flush as much data as possible
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* at that time (much like ecore_con). this means the parent is mallocing
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* its own write buffer in process space - giving us potentially huge
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* buffers, so synchronisation needs to be done at a higher level here as
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* buffers could just get huge
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*/
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return 0;
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}
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2005-09-28 06:09:09 -07:00
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/**
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* Sets the string tag for the given process handle
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*
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* @param exe The given process handle.
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* @param tag The string tag to set on the process handle.
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* @ingroup Ecore_Exe_Basic_Group
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*/
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void
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ecore_exe_tag_set(Ecore_Exe *exe, const char *tag)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_tag_set");
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2005-10-04 04:35:50 -07:00
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return;
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2005-09-28 06:09:09 -07:00
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}
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if (exe->tag) free(exe->tag);
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exe->tag = NULL;
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if (tag) exe->tag = strdup(tag);
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}
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/**
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* Retrieves the tag attached to the given process handle. There is no need to
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* free it as it just returns the internal pointer value. This value is only
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* valid as long as the @p exe is valid or until the tag is set to something
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* else on this @p exe.
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*
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* @param exe The given process handle.
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* @return The string attached to @p exe.
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* @ingroup Ecore_Exe_Basic_Group
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*/
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char *
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ecore_exe_tag_get(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_tag_get");
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return NULL;
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}
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return exe->tag;
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}
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2003-09-23 01:09:32 -07:00
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/**
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2004-09-21 21:25:35 -07:00
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* Frees the given process handle.
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*
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* Note that the process that the handle represents is unaffected by this
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* function.
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*
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* @param exe The given process handle.
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* @return The data attached to the handle when @ref ecore_exe_run was
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* called.
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* @ingroup Ecore_Exe_Basic_Group
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2003-09-23 01:09:32 -07:00
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*/
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void *
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ecore_exe_free(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_free");
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return NULL;
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}
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return _ecore_exe_free(exe);
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}
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/**
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2004-09-21 21:25:35 -07:00
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* Retrieves the process ID of the given spawned process.
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* @param exe Handle to the given spawned process.
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* @return The process ID on success. @c -1 otherwise.
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* @ingroup Ecore_Exe_Basic_Group
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2003-09-23 01:09:32 -07:00
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*/
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pid_t
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ecore_exe_pid_get(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_pid_get");
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return -1;
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}
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return exe->pid;
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}
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/**
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2004-09-21 21:25:35 -07:00
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* Retrieves the data attached to the given process handle.
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* @param exe The given process handle.
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* @return The data pointer attached to @p exe.
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* @ingroup Ecore_Exe_Basic_Group
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2003-09-23 01:09:32 -07:00
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*/
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void *
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ecore_exe_data_get(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_data_get");
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return NULL;
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}
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return exe->data;
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}
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/**
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2004-09-21 21:25:35 -07:00
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* @defgroup Ecore_Exe_Signal_Group Spawned Process Signal Functions
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*
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* Functions that send signals to spawned processes.
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*/
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/**
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* Pauses the given process by sending it a @c SIGSTOP signal.
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* @param exe Process handle to the given process.
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* @ingroup Ecore_Exe_Signal_Group
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2003-09-23 01:09:32 -07:00
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*/
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void
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ecore_exe_pause(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_pause");
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return;
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}
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kill(exe->pid, SIGSTOP);
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}
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/**
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2004-09-21 21:25:35 -07:00
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* Continues the given paused process by sending it a @c SIGCONT signal.
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* @param exe Process handle to the given process.
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* @ingroup Ecore_Exe_Signal_Group
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2003-09-23 01:09:32 -07:00
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*/
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void
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ecore_exe_continue(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_continue");
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return;
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}
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kill(exe->pid, SIGCONT);
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}
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/**
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2004-09-21 21:25:35 -07:00
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* Sends the given spawned process a terminate (@c SIGTERM) signal.
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* @param exe Process handle to the given process.
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* @ingroup Ecore_Exe_Signal_Group
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2003-09-23 01:09:32 -07:00
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*/
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void
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ecore_exe_terminate(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_terminate");
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return;
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}
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kill(exe->pid, SIGTERM);
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}
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/**
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2004-09-21 21:25:35 -07:00
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* Kills the given spawned process by sending it a @c SIGKILL signal.
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* @param exe Process handle to the given process.
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* @ingroup Ecore_Exe_Signal_Group
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2003-09-23 01:09:32 -07:00
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*/
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void
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ecore_exe_kill(Ecore_Exe *exe)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
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"ecore_exe_kill");
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return;
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}
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kill(exe->pid, SIGKILL);
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}
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/**
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2004-09-21 21:25:35 -07:00
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* Sends a @c SIGUSR signal to the given spawned process.
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* @param exe Process handle to the given process.
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* @param num The number user signal to send. Must be either 1 or 2, or
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* the signal will be ignored.
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* @ingroup Ecore_Exe_Signal_Group
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2003-09-23 01:09:32 -07:00
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*/
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void
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ecore_exe_signal(Ecore_Exe *exe, int num)
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{
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if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
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{
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|
|
ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
|
|
|
|
"ecore_exe_signal");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (num == 1)
|
|
|
|
kill(exe->pid, SIGUSR1);
|
|
|
|
else if (num == 2)
|
|
|
|
kill(exe->pid, SIGUSR2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2004-09-21 21:25:35 -07:00
|
|
|
* Sends a @c SIGHUP signal to the given spawned process.
|
|
|
|
* @param exe Process handle to the given process.
|
|
|
|
* @ingroup Ecore_Exe_Signal_Group
|
2003-09-23 01:09:32 -07:00
|
|
|
*/
|
|
|
|
void
|
|
|
|
ecore_exe_hup(Ecore_Exe *exe)
|
|
|
|
{
|
|
|
|
if (!ECORE_MAGIC_CHECK(exe, ECORE_MAGIC_EXE))
|
|
|
|
{
|
|
|
|
ECORE_MAGIC_FAIL(exe, ECORE_MAGIC_EXE,
|
|
|
|
"ecore_exe_hup");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
kill(exe->pid, SIGHUP);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
_ecore_exe_shutdown(void)
|
|
|
|
{
|
|
|
|
while (exes) _ecore_exe_free(exes);
|
|
|
|
}
|
|
|
|
|
|
|
|
Ecore_Exe *
|
|
|
|
_ecore_exe_find(pid_t pid)
|
|
|
|
{
|
2005-08-30 03:05:27 -07:00
|
|
|
Ecore_List2 *l;
|
2003-09-23 01:09:32 -07:00
|
|
|
|
2005-08-30 03:05:27 -07:00
|
|
|
for (l = (Ecore_List2 *)exes; l; l = l->next)
|
2003-09-23 01:09:32 -07:00
|
|
|
{
|
|
|
|
Ecore_Exe *exe;
|
|
|
|
|
|
|
|
exe = (Ecore_Exe *)l;
|
|
|
|
if (exe->pid == pid) return exe;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void *
|
|
|
|
_ecore_exe_free(Ecore_Exe *exe)
|
|
|
|
{
|
|
|
|
void *data;
|
2005-10-24 01:53:50 -07:00
|
|
|
|
|
|
|
/* FIXME: close fdhanlders and free buffers if they exist */
|
2003-09-23 01:09:32 -07:00
|
|
|
data = exe->data;
|
2005-08-30 03:05:27 -07:00
|
|
|
exes = _ecore_list2_remove(exes, exe);
|
2003-09-23 01:09:32 -07:00
|
|
|
ECORE_MAGIC_SET(exe, ECORE_MAGIC_NONE);
|
2005-09-28 06:09:09 -07:00
|
|
|
if (exe->tag) free(exe->tag);
|
2003-09-23 01:09:32 -07:00
|
|
|
free(exe);
|
|
|
|
return data;
|
|
|
|
}
|
2004-10-20 10:51:29 -07:00
|
|
|
#endif
|