src/util/u_process.c

   1 /*
   2  * Copyright © 2003 Felix Kuehling
   3  * Copyright © 2018 Advanced Micro Devices, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  15  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  16  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  17  * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
  18  * AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * The above copyright notice and this permission notice (including the
  24  * next paragraph) shall be included in all copies or substantial portions
  25  * of the Software.
  26  */
  27
  28 #include "u_process.h"
  29 #include <string.h>
  30 #include <errno.h>
  31 #include <stdlib.h>
  32
  33 #undef GET_PROGRAM_NAME
  34
  35 #if defined(__linux__) && defined(HAVE_PROGRAM_INVOCATION_NAME)
  36
  37 static char *path = NULL;
  38
  39 static void __freeProgramPath()
  40 {
  41    free(path);
  42    path = NULL;
  43 }
  44
  45 static const char *
  46 __getProgramName()
  47 {
  48    char * arg = strrchr(program_invocation_name, '/');
  49    if (arg) {
  50       /* If the / character was found this is likely a linux path or
  51        * an invocation path for a 64-bit wine program.
  52        *
  53        * However, some programs pass command line arguments into argv[0].
  54        * Strip these arguments out by using the realpath only if it was
  55        * a prefix of the invocation name.
  56        */
  57       if (!path) {
  58          path = realpath("/proc/self/exe", NULL);
  59          atexit(__freeProgramPath);
  60       }
  61
  62       if (path && strncmp(path, program_invocation_name, strlen(path)) == 0) {
  63          /* This shouldn't be null because path is a a prefix,
  64           * but check it anyway since path is static. */
  65          char * name = strrchr(path, '/');
  66          if (name)
  67             return name + 1;
  68       }
  69
  70       return arg+1;
  71    }
  72
  73    /* If there was no '/' at all we likely have a windows like path from
  74     * a wine application.
  75     */
  76    arg = strrchr(program_invocation_name, '\\');
  77    if (arg)
  78       return arg+1;
  79
  80    return program_invocation_name;
  81 }
  82 #    define GET_PROGRAM_NAME() __getProgramName()
  83 #elif defined(HAVE_PROGRAM_INVOCATION_NAME)
  84 #    define GET_PROGRAM_NAME() program_invocation_short_name
  85 #elif defined(__FreeBSD__) && (__FreeBSD__ >= 2)
  86 #    include <osreldate.h>
  87 #    if (__FreeBSD_version >= 440000)
  88 #        define GET_PROGRAM_NAME() getprogname()
  89 #    endif
  90 #elif defined(__NetBSD__)
  91 #    include <sys/param.h>
  92 #    if defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 106000100)
  93 #        define GET_PROGRAM_NAME() getprogname()
  94 #    endif
  95 #elif defined(__DragonFly__)
  96 #    define GET_PROGRAM_NAME() getprogname()
  97 #elif defined(__APPLE__)
  98 #    define GET_PROGRAM_NAME() getprogname()
  99 #elif defined(ANDROID)
 100 #    define GET_PROGRAM_NAME() getprogname()
 101 #elif defined(__sun)
 102 /* Solaris has getexecname() which returns the full path - return just
 103    the basename to match BSD getprogname() */
 104 #    include <libgen.h>
 105
 106 static const char *
 107 __getProgramName()
 108 {
 109     static const char *progname;
 110
 111     if (progname == NULL) {
 112         const char *e = getexecname();
 113         if (e != NULL) {
 114             /* Have to make a copy since getexecname can return a readonly
 115                string, but basename expects to be able to modify its arg. */
 116             char *n = strdup(e);
 117             if (n != NULL) {
 118                 progname = basename(n);
 119             }
 120         }
 121     }
 122     return progname;
 123 }
 124
 125 #    define GET_PROGRAM_NAME() __getProgramName()
 126 #endif
 127
 128 #if !defined(GET_PROGRAM_NAME)
 129 #    if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__UCLIBC__) || defined(ANDROID)
 130 /* This is a hack. It's said to work on OpenBSD, NetBSD and GNU.
 131  * Rogelio M.Serrano Jr. reported it's also working with UCLIBC. It's
 132  * used as a last resort, if there is no documented facility available. */
 133 static const char *
 134 __getProgramName()
 135 {
 136     extern const char *__progname;
 137     char * arg = strrchr(__progname, '/');
 138     if (arg)
 139         return arg+1;
 140     else
 141         return __progname;
 142 }
 143 #        define GET_PROGRAM_NAME() __getProgramName()
 144 #    else
 145 #        define GET_PROGRAM_NAME() ""
 146 #        pragma message ( "Warning: Per application configuration won't work with your OS version." )
 147 #    endif
 148 #endif
 149
 150 const char *
 151 util_get_process_name(void)
 152 {
 153    return GET_PROGRAM_NAME();
 154 }