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libbb: make BB_EXECVP/LP try to exec real binary if there's no /proc/self/exe

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2011-02-02 03:28:56 +01:00
parent 099e528919
commit c71b469f5d
3 changed files with 18 additions and 16 deletions
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10
libbb/execable.c
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@ -68,12 +68,12 @@ int FAST_FUNC exists_execable(const char *filename)
}
#if ENABLE_FEATURE_PREFER_APPLETS
/* just like the real execvp, but try to launch an applet named 'file' first
*/
int FAST_FUNC bb_execvp(const char *file, char *const argv[])
/* just like the real execvp, but try to launch an applet named 'file' first */
int FAST_FUNC BB_EXECVP(const char *file, char *const argv[])
{
return execvp(find_applet_by_name(file) >= 0 ? bb_busybox_exec_path : file,
argv);
if (find_applet_by_name(file) >= 0)
execvp(bb_busybox_exec_path, argv);
return execvp(file, argv);
}
#endif

12
libbb/vfork_daemon_rexec.c
View File

@ -182,17 +182,17 @@ int FAST_FUNC spawn_and_wait(char **argv)
int a = find_applet_by_name(argv[0]);
if (a >= 0 && (APPLET_IS_NOFORK(a)
#if BB_MMU
# if BB_MMU
|| APPLET_IS_NOEXEC(a) /* NOEXEC trick needs fork() */
#endif
# endif
)) {
#if BB_MMU
# if BB_MMU
if (APPLET_IS_NOFORK(a))
#endif
# endif
{
return run_nofork_applet(a, argv);
}
#if BB_MMU
# if BB_MMU
/* MMU only */
/* a->noexec is true */
rc = fork();
@ -201,7 +201,7 @@ int FAST_FUNC spawn_and_wait(char **argv)
/* child */
xfunc_error_retval = EXIT_FAILURE;
run_applet_no_and_exit(a, argv);
#endif
# endif
}
#endif /* FEATURE_PREFER_APPLETS */
rc = spawn(argv);