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glibc  2.9
execve.c
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00001 /* Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <unistd.h>
00021 
00022 #include <sysdep.h>
00023 #include <alloca.h>
00024 #include <sys/syscall.h>
00025 #include <bp-checks.h>
00026 
00027 extern int __syscall_execve (const char *__unbounded file,
00028                           char *__unbounded const *__unbounded argv,
00029                           char *__unbounded const *__unbounded envp);
00030 extern void __pthread_kill_other_threads_np (void);
00031 weak_extern (__pthread_kill_other_threads_np)
00032 
00033 
00034 int
00035 __execve (file, argv, envp)
00036      const char *file;
00037      char *const argv[];
00038      char *const envp[];
00039 {
00040   /* If this is a threaded application kill all other threads.  */
00041   if (__pthread_kill_other_threads_np)
00042     __pthread_kill_other_threads_np ();
00043 #if __BOUNDED_POINTERS__
00044   {
00045     char *const *v;
00046     int i;
00047     char *__unbounded *__unbounded ubp_argv;
00048     char *__unbounded *__unbounded ubp_envp;
00049     char *__unbounded *__unbounded ubp_v;
00050 
00051     for (v = argv; *v; v++)
00052       ;
00053     i = v - argv + 1;
00054     ubp_argv = (char *__unbounded *__unbounded) alloca (sizeof (*ubp_argv) * i);
00055     for (v = argv, ubp_v = ubp_argv; --i; v++, ubp_v++)
00056       *ubp_v = CHECK_STRING (*v);
00057     *ubp_v = 0;
00058 
00059     for (v = envp; *v; v++)
00060       ;
00061     i = v - envp + 1;
00062     ubp_envp = (char *__unbounded *__unbounded) alloca (sizeof (*ubp_envp) * i);
00063     for (v = envp, ubp_v = ubp_envp; --i; v++, ubp_v++)
00064       *ubp_v = CHECK_STRING (*v);
00065     *ubp_v = 0;
00066 
00067     return INLINE_SYSCALL (execve, 3, CHECK_STRING (file), ubp_argv, ubp_envp);
00068   }
00069 #else
00070   return INLINE_SYSCALL (execve, 3, file, argv, envp);
00071 #endif
00072 }
00073 weak_alias (__execve, execve)