/* vi: set sw=4 ts=4: */ /* * Copyright (C) 1999-2004 by Erik Andersen * Copyright (C) 2006 Gabriel Somlo * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ //config:config WHICH //config: bool "which (3.8 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-$(CONFIG_WHICH) += which.o //usage:#define which_trivial_usage //usage: "[-a] COMMAND..." //usage:#define which_full_usage "\n\n" //usage: "Locate COMMAND\n" //usage: "\n -a Show all matches" //usage: //usage:#define which_example_usage //usage: "$ 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)]; #if ENABLE_PLATFORM_MINGW32 && ENABLE_FEATURE_SH_STANDALONE /* If we were run as 'which.exe' skip standalone shell behaviour */ int sh_standalone = is_suffixed_with_case(bb_busybox_exec_path, "which.exe") == NULL; #endif 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 ENABLE_PLATFORM_MINGW32 && ENABLE_FEATURE_SH_STANDALONE if (sh_standalone) { if (strcmp(*argv, "busybox") == 0 && is_prefixed_with_case(bb_basename(bb_busybox_exec_path), "busybox")) { missing = 0; puts(bb_busybox_exec_path); if (!option_mask32) /* -a not set */ break; } else if (find_applet_by_name(*argv) >= 0) { missing = 0; puts(*argv); if (!option_mask32) /* -a not set */ break; } } #endif #if !ENABLE_PLATFORM_MINGW32 /* If file contains a slash don't use PATH */ if (strchr(*argv, '/')) { if (file_is_executable(*argv)) { missing = 0; puts(*argv); } #else if (has_path(*argv)) { char *path = alloc_system_drive(*argv); if (add_win32_extension(path) || file_is_executable(path)) { missing = 0; puts(bs_to_slash(path)); } # if ENABLE_FEATURE_SH_STANDALONE else if (sh_standalone) { const char *name = bb_basename(*argv); if (unix_path(*argv) && find_applet_by_name(name) >= 0) { missing = 0; puts(name); } } # endif #endif } 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; #if ENABLE_PLATFORM_MINGW32 puts(bs_to_slash(p)); #else puts(p); #endif free(p); if (!option_mask32) /* -a not set */ break; } } status |= missing; } while (*++argv); return status; }