/* vi: set sw=4 ts=4: * * which.c - Find executable files in $PATH. * * Copyright 2006 Rob landley <rob@landley.net> * * Not in SUSv3. USE_WHICH(NEWTOY(which, "<1a", TOYFLAG_USR|TOYFLAG_BIN)) config WHICH bool "which" default y help usage: which [-a] filename ... Search $PATH for executable files matching filename(s). -a Show all matches */ #include "toys.h" // Find an exectuable file either at a path with a slash in it (absolute or // relative to current directory), or in $PATH. Returns absolute path to file, // or NULL if not found. static int which_in_path(char *filename) { struct string_list *list; // If they gave us a path, don't worry about $PATH or -a if (index(filename, '/')) { // Confirm it has the executable bit set, and it's not a directory. if (!access(filename, X_OK)) { struct stat st; if (!stat(filename, &st) && S_ISREG(st.st_mode)) { puts(filename); return 0; } return 1; } } // Search $PATH for matches. list = find_in_path(getenv("PATH"), filename); if (!list) return 1; // Print out matches while (list) { if (!access(list->str, X_OK)) { puts(list->str); // If we should stop at one match, do so if (!toys.optflags) { llist_free(list, NULL); break; } } free(llist_pop(&list)); } return 0; } void which_main(void) { int i; for (i=0; toys.optargs[i]; i++) toys.exitval |= which_in_path(toys.optargs[i]); }