74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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* Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config WHICH
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//config: bool "which (3.8 kb)"
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//config: default y
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//config: help
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//config: which is used to find programs in your PATH and
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//config: print out their pathnames.
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//applet:IF_WHICH(APPLET_NOFORK(which, which, BB_DIR_USR_BIN, BB_SUID_DROP, which))
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//kbuild:lib-$(CONFIG_WHICH) += which.o
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//usage:#define which_trivial_usage
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//usage: "[COMMAND]..."
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//usage:#define which_full_usage "\n\n"
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//usage: "Locate a COMMAND"
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//usage:
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//usage:#define which_example_usage
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//usage: "$ which login\n"
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//usage: "/bin/login\n"
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#include "libbb.h"
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int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int which_main(int argc UNUSED_PARAM, char **argv)
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{
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char *env_path;
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int status = 0;
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/* This sizeof(): bb_default_root_path is shorter than BB_PATH_ROOT_PATH */
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char buf[sizeof(BB_PATH_ROOT_PATH)];
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env_path = getenv("PATH");
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if (!env_path)
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/* env_path must be writable, and must not alloc, so... */
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env_path = strcpy(buf, bb_default_root_path);
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getopt32(argv, "^" "a" "\0" "-1"/*at least one arg*/);
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argv += optind;
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do {
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int missing = 1;
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/* If file contains a slash don't use PATH */
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if (strchr(*argv, '/')) {
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if (file_is_executable(*argv)) {
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missing = 0;
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puts(*argv);
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}
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} else {
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char *path;
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char *p;
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path = env_path;
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/* NOFORK NB: xmalloc inside find_executable(), must have no allocs above! */
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while ((p = find_executable(*argv, &path)) != NULL) {
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missing = 0;
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puts(p);
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free(p);
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if (!option_mask32) /* -a not set */
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break;
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}
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}
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status |= missing;
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} while (*++argv);
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return status;
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}
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