int which_main(int argc, char **argv)
{
int status = EXIT_SUCCESS;
char *p;
if (argc <= 1 || argv[1][0] == '-') {
bb_show_usage();
}
/* We shouldn't do this. Ever. Not our business.
if (!getenv("PATH")) {
putenv((char*)bb_PATH_root_path);
}
*/
while (--argc > 0) {
argv++;
if (strchr(*argv, '/')) {
if (execable_file(*argv)) {
puts(*argv);
continue;
}
} else {
p = find_execable(*argv);
if (p) {
puts(p);
free(p);
continue;
}
}
status = EXIT_FAILURE;
}
fflush_stdout_and_exit(status);
}
int which_main(int argc, char **argv)
{
int status = EXIT_SUCCESS;
char *p;
if (argc <= 1 || argv[1][0] == '-') {
bb_show_usage();
}
if (!getenv("PATH")) {
setenv("PATH", "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin", 1);
}
while (--argc > 0) {
argv++;
if (strchr(*argv, '/')) {
if (execable_file(*argv)) {
puts(*argv);
continue;
}
} else {
p = find_execable(*argv);
if (p) {
puts(p);
free(p);
continue;
}
}
status = EXIT_FAILURE;
}
fflush_stdout_and_exit(status);
}
/* 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_execable 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_execable(const char *filename, char **PATHp)
{
char *p, *n;
p = *PATHp;
while (p) {
n = strchr(p, ':');
if (n)
*n++ = '\0';
if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
p = concat_path_file(p, filename);
if (execable_file(p)) {
*PATHp = n;
return p;
}
free(p);
}
p = n;
} /* on loop exit p == NULL */
return p;
}
/* search $PATH for an executable file;
* return allocated string containing full path if found;
* return NULL otherwise;
*/
char *find_execable(const char *filename)
{
char *path, *p, *n;
p = path = xstrdup(getenv("PATH"));
while (p) {
n = strchr(p, ':');
if (n)
*n++ = '\0';
if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
p = concat_path_file(p, filename);
if (execable_file(p)) {
free(path);
return p;
}
free(p);
}
p = n;
}
free(path);
return NULL;
}
