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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2018-01-12 13:21:33 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-01-12 13:21:33 +0100 |
| commit | cca7c611f26d98415c0f986e5a5e731ab5e379ff (patch) | |
| tree | a080a096774447299f7772bc5c5e6a47d2a9ef0f /libbb | |
| parent | 3bb3e1d0a1eed01306e22e59db8de6c2d945165a (diff) | |
| download | busybox-cca7c611f26d98415c0f986e5a5e731ab5e379ff.tar.gz | |
which: fix TODO with NOFORK+malloc_failure misbehaving
function old new delta
find_executable 86 104 +18
which_main 202 194 -8
executable_exists 66 51 -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 18/-23) Total: -5 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/executable.c | 18 | ||||
| -rw-r--r-- | libbb/messages.c | 8 |
2 files changed, 11 insertions, 15 deletions
diff --git a/libbb/executable.c b/libbb/executable.c index 325dd0107..29d2a2c85 100644 --- a/libbb/executable.c +++ b/libbb/executable.c @@ -25,7 +25,8 @@ int FAST_FUNC file_is_executable(const char *name) * you may call find_executable again with this PATHp to continue * (if it's not NULL). * return NULL otherwise; (PATHp is undefined) - * in all cases (*PATHp) contents will be trashed (s/:/NUL/). + * in all cases (*PATHp) contents are temporarily modified + * but are restored on return (s/:/NUL/ and back). */ char* FAST_FUNC find_executable(const char *filename, char **PATHp) { @@ -41,14 +42,17 @@ char* FAST_FUNC find_executable(const char *filename, char **PATHp) p = *PATHp; while (p) { + int ex; + n = strchr(p, ':'); - if (n) - *n++ = '\0'; + if (n) *n = '\0'; p = concat_path_file( p[0] ? p : ".", /* handle "::" case */ filename ); - if (file_is_executable(p)) { + ex = file_is_executable(p); + if (n) *n++ = ':'; + if (ex) { *PATHp = n; return p; } @@ -64,10 +68,8 @@ char* FAST_FUNC find_executable(const char *filename, char **PATHp) */ int FAST_FUNC executable_exists(const char *filename) { - char *path = xstrdup(getenv("PATH")); - char *tmp = path; - char *ret = find_executable(filename, &tmp); - free(path); + char *path = getenv("PATH"); + char *ret = find_executable(filename, &path); free(ret); return ret != NULL; } diff --git a/libbb/messages.c b/libbb/messages.c index 0a6cf3bf8..6914d5701 100644 --- a/libbb/messages.c +++ b/libbb/messages.c @@ -6,11 +6,6 @@ */ #include "libbb.h" -/* allow default system PATH to be extended via CFLAGS */ -#ifndef BB_ADDITIONAL_PATH -#define BB_ADDITIONAL_PATH "" -#endif - /* allow version to be extended, via CFLAGS */ #ifndef BB_EXTRA_VERSION #define BB_EXTRA_VERSION " ("AUTOCONF_TIMESTAMP")" @@ -36,8 +31,7 @@ const char bb_busybox_exec_path[] ALIGN1 = CONFIG_BUSYBOX_EXEC_PATH; const char bb_default_login_shell[] ALIGN1 = LIBBB_DEFAULT_LOGIN_SHELL; /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin, * but I want to save a few bytes here. Check libbb.h before changing! */ -const char bb_PATH_root_path[] ALIGN1 = - "PATH=/sbin:/usr/sbin:/bin:/usr/bin" BB_ADDITIONAL_PATH; +const char bb_PATH_root_path[] ALIGN1 = BB_PATH_ROOT_PATH; //const int const_int_1 = 1; |