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/* vi: set sw=4 ts=4: */
/*
* 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.
*/
//config:config WHICH
//config: bool "which (3.7 kb)"
//config: default y
//config: help
//config: which is used to find programs in your PATH and
//config: print out their pathnames.
//applet:IF_WHICH(APPLET_NOFORK(which, which, BB_DIR_USR_BIN, BB_SUID_DROP, which))
//kbuild:lib-$(CONFIG_WHICH) += which.o
//usage:#define which_trivial_usage
//usage: "[COMMAND]..."
//usage:#define which_full_usage "\n\n"
//usage: "Locate a COMMAND"
//usage:
//usage:#define which_example_usage
//usage: "$ 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)
{
char *env_path;
int status = 0;
/* This sizeof(): bb_default_root_path is shorter than BB_PATH_ROOT_PATH */
char buf[sizeof(BB_PATH_ROOT_PATH)];
env_path = getenv("PATH");
if (!env_path)
/* env_path must be writable, and must not alloc, so... */
env_path = strcpy(buf, bb_default_root_path);
getopt32(argv, "^" "a" "\0" "-1"/*at least one arg*/);
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 *p;
path = env_path;
/* NOFORK NB: xmalloc inside find_executable(), must have no allocs above! */
while ((p = find_executable(*argv, &path)) != NULL) {
missing = 0;
puts(p);
free(p);
if (!option_mask32) /* -a not set */
break;
}
}
status |= missing;
} while (*++argv);
return status;
}
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