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/* vi: set sw=4 ts=4: */
/*
* Which implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Based on which from debianutils
*/
//usage:#define which_trivial_usage
//usage: "[COMMAND]..."
//usage:#define which_full_usage "\n\n"
//usage: "Locate a COMMAND"
//usage:
//usage:#define which_example_usage
//usage: "$ which login\n"
//usage: "/bin/login\n"
#include "libbb.h"
int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int which_main(int argc UNUSED_PARAM, char **argv)
{
IF_DESKTOP(int opt;)
int status = EXIT_SUCCESS;
char *path;
char *p;
opt_complementary = "-1"; /* at least one argument */
IF_DESKTOP(opt =) getopt32(argv, "a");
argv += optind;
/* This matches what is seen on e.g. ubuntu.
* "which" there is a shell script. */
path = getenv("PATH");
if (!path) {
path = (char*)bb_PATH_root_path;
putenv(path);
path += 5; /* skip "PATH=" */
}
do {
#if ENABLE_DESKTOP
/* Much bloat just to support -a */
if (strchr(*argv, '/')) {
if (file_is_executable(*argv)) {
puts(*argv);
continue;
}
status = EXIT_FAILURE;
} else {
char *path2 = xstrdup(path);
char *tmp = path2;
p = find_executable(*argv, &tmp);
if (!p)
status = EXIT_FAILURE;
else {
print:
puts(p);
free(p);
if (opt) {
/* -a: show matches in all PATH components */
if (tmp) {
p = find_executable(*argv, &tmp);
if (p)
goto print;
}
}
}
free(path2);
}
#else
/* Just ignoring -a */
if (strchr(*argv, '/')) {
if (file_is_executable(*argv)) {
puts(*argv);
continue;
}
} else {
char *path2 = xstrdup(path);
char *tmp = path2;
p = find_executable(*argv, &tmp);
free(path2);
if (p) {
puts(p);
free(p);
continue;
}
}
status = EXIT_FAILURE;
#endif
} while (*(++argv) != NULL);
fflush_stdout_and_exit(status);
}
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