/* 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) { const char *env_path; int status = 0; env_path = getenv("PATH"); if (!env_path) env_path = 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 *tmp; char *p; path = tmp = xstrdup(env_path); //NOFORK FIXME: nested xmallocs (one is inside find_executable()) //can leak memory on failure while ((p = find_executable(*argv, &tmp)) != NULL) { missing = 0; puts(p); free(p); if (!option_mask32) /* -a not set */ break; } free(path); } status |= missing; } while (*++argv); return status; }