| /* 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; |
| } |