747 lines
21 KiB
C
747 lines
21 KiB
C
/* EINA - EFL data type library
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* Copyright (C) 2011 Carsten Haitzler
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif
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#ifdef HAVE_ALLOCA_H
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# include <alloca.h>
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#elif !defined alloca
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# ifdef __GNUC__
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# define alloca __builtin_alloca
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# elif defined _AIX
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# define alloca __alloca
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# elif defined _MSC_VER
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# include <malloc.h>
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# define alloca _alloca
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# elif !defined HAVE_ALLOCA
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# ifdef __cplusplus
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extern "C"
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# endif
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void *alloca (size_t);
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# endif
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <limits.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_DLADDR
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# include <dlfcn.h>
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#endif
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#ifdef HAVE_EVIL
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# include <Evil.h>
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#endif
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#ifdef HAVE_ESCAPE
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# include <Escape.h>
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#endif
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#include "eina_config.h"
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#include "eina_private.h"
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#include "eina_log.h"
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#include "eina_prefix.h"
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#ifdef _WIN32
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# define PSEP_C ';'
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# define DSEP_C '\\'
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# define DSEP_S "\\"
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#else
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# define PSEP_C ':'
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# define DSEP_C '/'
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# define DSEP_S "/"
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#endif /* _WIN32 */
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/*============================================================================*
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* Local *
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*============================================================================*/
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/**
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* @cond LOCAL
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*/
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struct _Eina_Prefix
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{
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char *exe_path;
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char *prefix_path;
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char *prefix_path_bin;
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char *prefix_path_data;
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char *prefix_path_lib;
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char *prefix_path_locale;
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unsigned char fallback : 1;
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unsigned char no_common_prefix : 1;
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unsigned char env_used : 1;
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};
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#define STRDUP_REP(x, y) do { if (x) free(x); x = strdup(y); } while (0)
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#define IF_FREE_NULL(p) do { if (p) { free(p); p = NULL; } } while (0)
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#ifndef EINA_LOG_COLOR_DEFAULT
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#define EINA_LOG_COLOR_DEFAULT EINA_COLOR_CYAN
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#endif
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#ifdef ERR
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#undef ERR
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#endif
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#define ERR(...) EINA_LOG_DOM_ERR(_eina_prefix_log_dom, __VA_ARGS__)
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#ifdef WRN
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#undef WRN
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#endif
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#define WRN(...) EINA_LOG_DOM_WARN(_eina_prefix_log_dom, __VA_ARGS__)
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#ifdef INF
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#undef INF
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#endif
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#define INF(...) EINA_LOG_DOM_INFO(_eina_prefix_log_dom, __VA_ARGS__)
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#ifdef DBG
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#undef DBG
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#endif
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#define DBG(...) EINA_LOG_DOM_DBG(_eina_prefix_log_dom, __VA_ARGS__)
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static int _eina_prefix_log_dom = -1;
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static int
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_fallback(Eina_Prefix *pfx, const char *pkg_bin, const char *pkg_lib,
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const char *pkg_data, const char *pkg_locale, const char *envprefix)
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{
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char *p;
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STRDUP_REP(pfx->prefix_path, pkg_bin);
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if (!pfx->prefix_path) return 0;
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p = strrchr(pfx->prefix_path, DSEP_C);
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if (p) *p = 0;
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STRDUP_REP(pfx->prefix_path_bin, pkg_bin);
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STRDUP_REP(pfx->prefix_path_lib, pkg_lib);
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STRDUP_REP(pfx->prefix_path_data, pkg_data);
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STRDUP_REP(pfx->prefix_path_locale, pkg_locale);
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WRN("Could not determine its installed prefix for '%s'\n"
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" so am falling back on the compiled in default:\n"
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" %s\n"
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" implied by the following:\n"
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" bindir = %s\n"
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" libdir = %s\n"
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" datadir = %s\n"
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" localedir = %s\n"
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" Try setting the following environment variables:\n"
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" %s_PREFIX - points to the base prefix of install\n"
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" or the next 4 variables\n"
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" %s_BIN_DIR - provide a specific binary directory\n"
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" %s_LIB_DIR - provide a specific library directory\n"
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" %s_DATA_DIR - provide a specific data directory\n"
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" %s_LOCALE_DIR - provide a specific locale directory",
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envprefix,
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pfx->prefix_path, pkg_bin, pkg_lib, pkg_data, pkg_locale,
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envprefix, envprefix, envprefix, envprefix, envprefix);
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pfx->fallback = 1;
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return 1;
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}
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#ifndef _WIN32
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static int
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_try_proc(Eina_Prefix *pfx, void *symbol)
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{
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FILE *f;
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char buf[4096];
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DBG("Try /proc/self/maps");
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f = fopen("/proc/self/maps", "rb");
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if (!f) return 0;
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DBG("Exists /proc/self/maps");
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while (fgets(buf, sizeof(buf), f))
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{
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int len;
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char *p, mode[5] = "";
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unsigned long ptr1 = 0, ptr2 = 0;
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len = strlen(buf);
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if (buf[len - 1] == '\n')
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{
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buf[len - 1] = 0;
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len--;
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}
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if (sscanf(buf, "%lx-%lx %4s", &ptr1, &ptr2, mode) == 3)
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{
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if (!strcmp(mode, "r-xp"))
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{
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if (((void *)ptr1 <= symbol) && (symbol < (void *)ptr2))
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{
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DBG("Found in /proc/self/maps: %s", buf);
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p = strchr(buf, '/');
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if (p)
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{
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DBG("Found in /proc/self/maps: found last /");
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if (len > 10)
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{
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if (!strcmp(buf + len - 10, " (deleted)"))
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buf[len - 10] = 0;
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}
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STRDUP_REP(pfx->exe_path, p);
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INF("Found in /proc/self/maps: guess exe path is %s", pfx->exe_path);
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fclose(f);
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return 1;
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}
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else break;
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}
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}
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}
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}
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fclose(f);
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WRN("Failed in /proc/self/maps");
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return 0;
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}
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#endif
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static int
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_try_argv(Eina_Prefix *pfx, const char *argv0)
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{
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char *path, *p, *cp, *s;
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int len, lenexe;
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char buf[PATH_MAX], buf2[PATH_MAX], buf3[PATH_MAX];
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DBG("Try argv0 = %s", argv0);
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/* 1. is argv0 abs path? */
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#ifdef _WIN32
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if (evil_path_is_absolute(argv0))
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#else
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if (argv0[0] == DSEP_C)
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#endif
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{
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DBG("Match arvg0 is full path: %s", argv0);
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STRDUP_REP(pfx->exe_path, argv0);
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if (access(pfx->exe_path, X_OK) == 0)
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{
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INF("Executable argv0 = %s", argv0);
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return 1;
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}
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IF_FREE_NULL(pfx->exe_path);
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DBG("Non existent argv0: %s", argv0);
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return 0;
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}
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/* 2. relative path */
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if (strchr(argv0, DSEP_C))
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{
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DBG("Relative path argv0: %s", argv0);
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if (getcwd(buf3, sizeof(buf3)))
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{
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snprintf(buf2, sizeof(buf2), "%s" DSEP_S "%s", buf3, argv0);
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DBG("Relative to CWD: %s", buf2);
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if (realpath(buf2, buf))
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{
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DBG("Realpath is: %s", buf);
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STRDUP_REP(pfx->exe_path, buf);
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if (access(pfx->exe_path, X_OK) == 0)
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{
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INF("Path %s is executable", pfx->exe_path);
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return 1;
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}
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DBG("Fail check for executable: %s", pfx->exe_path);
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IF_FREE_NULL(pfx->exe_path);
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}
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}
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}
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/* 3. argv0 no path - look in PATH */
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DBG("Look for argv0=%s in $PATH", argv0);
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path = getenv("PATH");
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if (!path) return 0;
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p = path;
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cp = p;
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lenexe = strlen(argv0);
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while ((p = strchr(cp, PSEP_C)))
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{
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len = p - cp;
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s = malloc(len + 1 + lenexe + 1);
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if (s)
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{
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strncpy(s, cp, len);
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s[len] = DSEP_C;
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strcpy(s + len + 1, argv0);
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DBG("Try path: %s", s);
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if (realpath(s, buf))
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{
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DBG("Realpath is: %s", buf);
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if (access(buf, X_OK) == 0)
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{
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STRDUP_REP(pfx->exe_path, buf);
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INF("Path %s is executable", pfx->exe_path);
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free(s);
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return 1;
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}
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}
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free(s);
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}
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cp = p + 1;
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}
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/* 4. big problems. arg[0] != executable - weird execution */
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return 0;
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}
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static int
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_get_env_var(char **var, const char *env, const char *prefix, const char *dir)
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{
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char buf[PATH_MAX];
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const char *s = getenv(env);
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DBG("Try env var %s", env);
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if (s)
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{
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INF("Have env %s = %s", env, s);
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STRDUP_REP(*var, s);
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return 1;
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}
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else if (prefix)
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{
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snprintf(buf, sizeof(buf), "%s" DSEP_S "%s", prefix, dir);
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INF("Have prefix %s = %s", prefix, buf);
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STRDUP_REP(*var, buf);
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return 1;
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}
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return 0;
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}
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static int
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_get_env_vars(Eina_Prefix *pfx,
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const char *envprefix,
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const char *bindir,
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const char *libdir,
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const char *datadir,
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const char *localedir)
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{
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char env[1024];
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const char *s;
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int ret = 0;
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snprintf(env, sizeof(env), "%s_PREFIX", envprefix);
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if ((s = getenv(env))) STRDUP_REP(pfx->prefix_path, s);
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snprintf(env, sizeof(env), "%s_BIN_DIR", envprefix);
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ret += _get_env_var(&pfx->prefix_path_bin, env, s, bindir);
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snprintf(env, sizeof(env), "%s_LIB_DIR", envprefix);
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ret += _get_env_var(&pfx->prefix_path_lib, env, s, libdir);
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snprintf(env, sizeof(env), "%s_DATA_DIR", envprefix);
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ret += _get_env_var(&pfx->prefix_path_data, env, s, datadir);
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snprintf(env, sizeof(env), "%s_LOCALE_DIR", envprefix);
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ret += _get_env_var(&pfx->prefix_path_locale, env, s, localedir);
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return ret;
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}
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/**
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* @endcond
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*/
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/*============================================================================*
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* Global *
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*============================================================================*/
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/*============================================================================*
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* API *
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*============================================================================*/
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EAPI Eina_Prefix *
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eina_prefix_new(const char *argv0, void *symbol, const char *envprefix,
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const char *sharedir, const char *magicsharefile,
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const char *pkg_bin, const char *pkg_lib,
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const char *pkg_data, const char *pkg_locale)
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{
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Eina_Prefix *pfx;
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char *p, buf[4096], *tmp, *magic = NULL;
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struct stat st;
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const char *p1, *p2;
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const char *pkg_bin_p = NULL;
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const char *pkg_lib_p = NULL;
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const char *pkg_data_p = NULL;
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const char *pkg_locale_p = NULL;
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const char *bindir = "bin";
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const char *libdir = "lib";
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const char *datadir = "share";
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const char *localedir = "share";
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DBG("EINA PREFIX: argv0=%s, symbol=%p, magicsharefile=%s, envprefix=%s",
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argv0, symbol, magicsharefile, envprefix);
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pfx = calloc(1, sizeof(Eina_Prefix));
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if (!pfx) return NULL;
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/* if provided with a share dir use datadir/sharedir as the share dir */
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if (sharedir)
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{
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int len;
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len = snprintf(buf, sizeof(buf), "%s" DSEP_S "%s", datadir, sharedir);
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if (len > 0)
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{
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#ifdef _WIN32
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/* on win32 convert / to \ for path here */
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for (p = buf + strlen(datadir) + strlen(DSEP_S); *p; p++)
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{
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if (*p == '/') *p = DSEP_C;
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}
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#endif
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tmp = alloca(len + 1);
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strcpy(tmp, buf);
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datadir = tmp;
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}
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}
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if (magicsharefile)
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{
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magic = alloca(strlen(magicsharefile));
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strcpy(magic, magicsharefile);
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#ifdef _WIN32
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/* on win32 convert / to \ for path here */
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for (p = magic; *p; p++)
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{
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if (*p == '/') *p = DSEP_C;
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}
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#endif
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}
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/* look at compile-time package bin/lib/datadir etc. and figure out the
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* bin, lib and data dirs from these, if possible. i.e.
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* bin = /usr/local/bin
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* lib = /usr/local/lib
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* data = /usr/local/share/enlightenment
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* thus they all have a common prefix string of /usr/local/ and
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* bindir = bin
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* libdir = lib
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* datadir = share/enlightenment
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* this addresses things like libdir is lib64 or lib32 or other such
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* junk distributions like to do so then:
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* bin = /usr/local/bin
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* lib = /usr/local/lib64
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* data = /usr/local/share/enlightenment
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* then
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* bindir = bin
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* libdir = lib64
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* datadir = share/enlightennment
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* in theory this should also work with debians new multiarch style like
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* bindir = bin
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* libdir = lib/i386-linux-gnu
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* or
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* libdir = lib/x86_64-linux-gnu
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* all with a common prefix that can be relocated
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*/
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/* 1. check last common char in bin and lib strings */
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for (p1 = pkg_bin, p2 = pkg_lib; *p1 && *p2; p1++, p2++)
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{
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if (*p1 != *p2)
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{
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pkg_bin_p = p1;
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pkg_lib_p = p2;
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break;
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}
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}
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/* 1. check last common char in bin and data strings */
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for (p1 = pkg_bin, p2 = pkg_data; *p1 && *p2; p1++, p2++)
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{
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if (*p1 != *p2)
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{
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pkg_data_p = p2;
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break;
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}
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}
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/* 1. check last common char in bin and locale strings */
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for (p1 = pkg_bin, p2 = pkg_locale; *p1 && *p2; p1++, p2++)
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{
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if (*p1 != *p2)
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{
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pkg_locale_p = p2;
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break;
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}
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}
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/* 2. if all the common string offsets match we compiled with a common prefix */
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if (((pkg_bin_p - pkg_bin) == (pkg_lib_p - pkg_lib))
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&& ((pkg_bin_p - pkg_bin) == (pkg_data_p - pkg_data))
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&& ((pkg_bin_p - pkg_bin) == (pkg_locale_p - pkg_locale))
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)
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{
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bindir = pkg_bin_p;
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libdir = pkg_lib_p;
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datadir = pkg_data_p;
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localedir = pkg_locale_p;
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DBG("Prefix relative bindir = %s", bindir);
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DBG("Prefix relative libdir = %s", libdir);
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DBG("Prefix relative datadir = %s", datadir);
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DBG("Prefix relative localedir = %s", localedir);
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}
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/* 3. some galoot thought it awesome not to give us a common prefix at compile time
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* so fall back to the compile time directories. we are no longer relocatable */
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else
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{
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STRDUP_REP(pfx->prefix_path_bin, pkg_bin);
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STRDUP_REP(pfx->prefix_path_lib, pkg_lib);
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STRDUP_REP(pfx->prefix_path_data, pkg_data);
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STRDUP_REP(pfx->prefix_path_locale, pkg_locale);
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pfx->no_common_prefix = 1;
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DBG("Can't work out a common prefix - compiled in fallback");
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}
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/* if user provides env vars - then use that or also more specific sub
|
|
* dirs for bin, lib, data and locale */
|
|
if ((envprefix) &&
|
|
(_get_env_vars(pfx, envprefix, bindir, libdir, datadir, localedir) > 0))
|
|
{
|
|
pfx->env_used = 1;
|
|
return pfx;
|
|
}
|
|
|
|
#ifdef HAVE_DLADDR
|
|
DBG("Try dladdr on %p", symbol);
|
|
if (symbol)
|
|
{
|
|
Dl_info info_dl;
|
|
|
|
if (dladdr(symbol, &info_dl))
|
|
{
|
|
DBG("Dlinfo worked");
|
|
if (info_dl.dli_fname)
|
|
{
|
|
DBG("Dlinfo dli_fname = %s", info_dl.dli_fname);
|
|
# ifdef _WIN32
|
|
if (evil_path_is_absolute(info_dl.dli_fname))
|
|
# else
|
|
if (info_dl.dli_fname[0] == DSEP_C)
|
|
# endif
|
|
{
|
|
INF("Dlsym gave full path = %s", info_dl.dli_fname);
|
|
STRDUP_REP(pfx->exe_path, info_dl.dli_fname);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
/* no env var - examine process and possible argv0 */
|
|
if ((argv0) && (!pfx->exe_path) && (symbol))
|
|
{
|
|
#ifndef _WIN32
|
|
if (!_try_proc(pfx, symbol))
|
|
{
|
|
#endif
|
|
if (!_try_argv(pfx, argv0))
|
|
{
|
|
_fallback(pfx, pkg_bin, pkg_lib, pkg_data, pkg_locale,
|
|
envprefix);
|
|
return pfx;
|
|
}
|
|
#ifndef _WIN32
|
|
}
|
|
#endif
|
|
}
|
|
if (!pfx->exe_path)
|
|
{
|
|
WRN("Fallback - nothing found");
|
|
_fallback(pfx, pkg_bin, pkg_lib, pkg_data, pkg_locale, envprefix);
|
|
return pfx;
|
|
}
|
|
/* _exe_path is now a full absolute path TO this exe - figure out rest */
|
|
/* if
|
|
* exe = /blah/whatever/bin/exe
|
|
* or
|
|
* exe = /blah/whatever/lib/libexe.so
|
|
* then
|
|
* prefix = /blah/whatever
|
|
* bin_dir = /blah/whatever/bin
|
|
* data_dir = /blah/whatever/share/enlightenment
|
|
* lib_dir = /blah/whatever/lib
|
|
*
|
|
* new case - debian multiarch goop.
|
|
* exe = /blah/whatever/lib/arch/libexe.so
|
|
*/
|
|
DBG("From exe %s figure out the rest", pfx->exe_path);
|
|
p = strrchr(pfx->exe_path, DSEP_C);
|
|
if (p)
|
|
{
|
|
p--;
|
|
while (p >= pfx->exe_path)
|
|
{
|
|
if (*p == DSEP_C)
|
|
{
|
|
if (pfx->prefix_path) free(pfx->prefix_path);
|
|
pfx->prefix_path = malloc(p - pfx->exe_path + 1);
|
|
if (pfx->prefix_path)
|
|
{
|
|
strncpy(pfx->prefix_path, pfx->exe_path,
|
|
p - pfx->exe_path);
|
|
pfx->prefix_path[p - pfx->exe_path] = 0;
|
|
DBG("Have prefix = %s", pfx->prefix_path);
|
|
|
|
/* bin */
|
|
snprintf(buf, sizeof(buf), "%s" DSEP_S "%s",
|
|
pfx->prefix_path, bindir);
|
|
STRDUP_REP(pfx->prefix_path_bin, buf);
|
|
DBG("Have bin = %s", pfx->prefix_path_bin);
|
|
/* lib */
|
|
snprintf(buf, sizeof(buf), "%s" DSEP_S "%s",
|
|
pfx->prefix_path, libdir);
|
|
STRDUP_REP(pfx->prefix_path_lib, buf);
|
|
DBG("Have lib = %s", pfx->prefix_path_lib);
|
|
/* locale */
|
|
snprintf(buf, sizeof(buf), "%s" DSEP_S "%s",
|
|
pfx->prefix_path, localedir);
|
|
STRDUP_REP(pfx->prefix_path_locale, buf);
|
|
DBG("Have locale = %s", pfx->prefix_path_locale);
|
|
/* check if magic file is there - then our guess is right */
|
|
if (magic)
|
|
{
|
|
DBG("Magic = %s", magic);
|
|
snprintf(buf, sizeof(buf),
|
|
"%s" DSEP_S "%s" DSEP_S "%s",
|
|
pfx->prefix_path, datadir, magic);
|
|
DBG("Check in %s", buf);
|
|
}
|
|
if ((!magic) || (stat(buf, &st) == 0))
|
|
{
|
|
if (buf[0])
|
|
DBG("Magic path %s stat passed", buf);
|
|
else
|
|
DBG("No magic file");
|
|
snprintf(buf, sizeof(buf), "%s" DSEP_S "%s",
|
|
pfx->prefix_path, datadir);
|
|
STRDUP_REP(pfx->prefix_path_data, buf);
|
|
}
|
|
/* magic file not there. time to start hunting! */
|
|
else
|
|
{
|
|
if (buf[0])
|
|
{
|
|
for (;p > pfx->exe_path; p--)
|
|
{
|
|
if (*p == DSEP_C)
|
|
{
|
|
p--;
|
|
break;
|
|
}
|
|
}
|
|
if (p > pfx->exe_path)
|
|
{
|
|
continue;
|
|
DBG("Go back one directory");
|
|
}
|
|
}
|
|
WRN("Magic failed");
|
|
_fallback(pfx, pkg_bin, pkg_lib, pkg_data,
|
|
pkg_locale, envprefix);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
WRN("No Prefix path (alloc fail)");
|
|
_fallback(pfx, pkg_bin, pkg_lib, pkg_data, pkg_locale,
|
|
envprefix);
|
|
}
|
|
return pfx;
|
|
}
|
|
p--;
|
|
}
|
|
}
|
|
WRN("Final fallback");
|
|
_fallback(pfx, pkg_bin, pkg_lib, pkg_data, pkg_locale, envprefix);
|
|
return pfx;
|
|
}
|
|
|
|
EAPI void
|
|
eina_prefix_free(Eina_Prefix *pfx)
|
|
{
|
|
if (!pfx) return;
|
|
|
|
IF_FREE_NULL(pfx->exe_path);
|
|
IF_FREE_NULL(pfx->prefix_path);
|
|
IF_FREE_NULL(pfx->prefix_path_bin);
|
|
IF_FREE_NULL(pfx->prefix_path_data);
|
|
IF_FREE_NULL(pfx->prefix_path_lib);
|
|
IF_FREE_NULL(pfx->prefix_path_locale);
|
|
free(pfx);
|
|
}
|
|
|
|
EAPI const char *
|
|
eina_prefix_get(Eina_Prefix *pfx)
|
|
{
|
|
if (!pfx) return "";
|
|
return pfx->prefix_path;
|
|
}
|
|
|
|
EAPI const char *
|
|
eina_prefix_bin_get(Eina_Prefix *pfx)
|
|
{
|
|
if (!pfx) return "";
|
|
return pfx->prefix_path_bin;
|
|
}
|
|
|
|
EAPI const char *
|
|
eina_prefix_lib_get(Eina_Prefix *pfx)
|
|
{
|
|
if (!pfx) return "";
|
|
return pfx->prefix_path_lib;
|
|
}
|
|
|
|
EAPI const char *
|
|
eina_prefix_data_get(Eina_Prefix *pfx)
|
|
{
|
|
if (!pfx) return "";
|
|
return pfx->prefix_path_data;
|
|
}
|
|
|
|
EAPI const char *
|
|
eina_prefix_locale_get(Eina_Prefix *pfx)
|
|
{
|
|
if (!pfx) return "";
|
|
return pfx->prefix_path_locale;
|
|
}
|
|
|
|
Eina_Bool
|
|
eina_prefix_init(void)
|
|
{
|
|
_eina_prefix_log_dom = eina_log_domain_register("eina_prefix",
|
|
EINA_LOG_COLOR_DEFAULT);
|
|
if (_eina_prefix_log_dom < 0)
|
|
{
|
|
EINA_LOG_ERR("Could not register log domain: eina_prefix");
|
|
return EINA_FALSE;
|
|
}
|
|
|
|
return EINA_TRUE;
|
|
}
|
|
|
|
Eina_Bool
|
|
eina_prefix_shutdown(void)
|
|
{
|
|
eina_log_domain_unregister(_eina_prefix_log_dom);
|
|
_eina_prefix_log_dom = -1;
|
|
return EINA_TRUE;
|
|
}
|