int main(int argc, char *argv[]) {
int r = EXIT_SUCCESS;
if (argc > 1 && argc != 4) {
log_error("This program takes three or no arguments.");
return EXIT_FAILURE;
}
if (argc > 1)
arg_dest = argv[1];
log_set_target(LOG_TARGET_SAFE);
log_parse_environment();
log_open();
umask(0022);
if (file_is_executable(RC_LOCAL_SCRIPT_PATH_START)) {
log_debug("Automatically adding rc-local.service.");
if (add_symlink("rc-local.service", "multi-user.target") < 0)
r = EXIT_FAILURE;
}
if (file_is_executable(RC_LOCAL_SCRIPT_PATH_STOP)) {
log_debug("Automatically adding halt-local.service.");
if (add_symlink("halt-local.service", "final.target") < 0)
r = EXIT_FAILURE;
}
return r;
}
/* search (*PATHp) for an executable file;
* return allocated string containing full path if found;
* PATHp points to the component after the one where it was found
* (or NULL),
* 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/).
*/
char* FAST_FUNC find_executable(const char *filename, char **PATHp)
{
/* About empty components in $PATH:
* http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap08.html
* 8.3 Other Environment Variables - PATH
* A zero-length prefix is a legacy feature that indicates the current
* working directory. It appears as two adjacent colons ( "::" ), as an
* initial colon preceding the rest of the list, or as a trailing colon
* following the rest of the list.
*/
char *p, *n;
p = *PATHp;
while (p) {
n = strchr(p, ':');
if (n)
*n++ = '\0';
p = concat_path_file(
p[0] ? p : ".", /* handle "::" case */
filename
);
if (file_is_executable(p)) {
*PATHp = n;
return p;
}
free(p);
p = n;
} /* on loop exit p == NULL */
return p;
}
int which_main(int argc UNUSED_PARAM, char **argv)
{
const char *env_path;
int status = 0;
env_path = getenv("PATH");
if (!env_path)
env_path = bb_default_root_path;
opt_complementary = "-1"; /* at least one argument */
getopt32(argv, "a");
argv += optind;
do {
int missing = 1;
/* If file contains a slash don't use PATH */
if (strchr(*argv, '/')) {
if (file_is_executable(*argv)) {
missing = 0;
puts(*argv);
}
} else {
char *path;
char *tmp;
char *p;
path = tmp = xstrdup(env_path);
while ((p = find_executable(*argv, &tmp)) != NULL) {
missing = 0;
puts(p);
free(p);
if (!option_mask32) /* -a not set */
break;
}
free(path);
}
status |= missing;
} while (*++argv);
return status;
}
