httpd: require "HTTP/xyz" at the end of request line

[oweals/busybox.git] / debianutils / which.c

diff --git a/debianutils/which.c b/debianutils/which.c
index deb036aa0fb5920d58a1e46f57f016e9b7ee3016..98876521f80906730f8b2906f7689d1ba8c10774 100644 (file)
--- a/debianutils/which.c
+++ b/debianutils/which.c
@@ -1,109 +1,73 @@
 /* vi: set sw=4 ts=4: */
 /*
- * Which implementation for busybox
- *
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
  *
- * Licensed under the GPL v2, see the file LICENSE in this tarball.
- *
- * Based on which from debianutils
+ * 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.
 
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include "busybox.h"
+//applet:IF_WHICH(APPLET_NOFORK(which, which, BB_DIR_USR_BIN, BB_SUID_DROP, which))
 
-extern int which_main(int argc, char **argv)
-{
-       int status = EXIT_SUCCESS;
-       size_t i, count;
-       char *path_list;
+//kbuild:lib-$(CONFIG_WHICH) += which.o
 
-       if (argc <= 1 || **(argv + 1) == '-') {
-               bb_show_usage();
-       }
-       argc--;
+//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"
 
-       path_list = getenv("PATH");
-       if (path_list != NULL) {
-               size_t path_len = bb_strlen(path_list);
-               char *new_list = NULL;
-               count = 1;
+#include "libbb.h"
 
-               for (i = 0; i <= path_len; i++) {
-                       char *this_i = &path_list[i];
-                       if (*this_i == ':') {
-                               /* ^::[^:] == \.: */
-                               if (!i && (*(this_i + 1) == ':')) {
-                                       *this_i = '.';
-                                       continue;
-                               }
-                               *this_i = 0;
-                               count++;
-                               /* ^:[^:] == \.0 and [^:]::[^:] == 0\.0 and [^:]:$ == 0\.0 */
-                               if (!i || (*(this_i + 1) == ':') || (i == path_len-1)) {
-                                       new_list = xrealloc(new_list, path_len += 1);
-                                       if (i) {
-                                               memmove(&new_list[i+2], &path_list[i+1], path_len-i);
-                                               new_list[i+1] = '.';
-                                               memmove(new_list, path_list, i);
-                                       } else {
-                                               memmove(&new_list[i+1], &path_list[i], path_len-i);
-                                               new_list[i] = '.';
-                                       }
-                                       path_list = new_list;
-                               }
-                       }
-               }
-       } else {
-               path_list = "/bin\0/sbin\0/usr/bin\0/usr/sbin\0/usr/local/bin";
-               count = 5;
-       }
+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);
 
-       while (argc-- > 0) {
-               struct stat stat_b;
-               char *buf;
-               char *path_n;
-               char found = 0;
-#define is_executable_file(a, b) (!access(a,X_OK) && !stat(a, &b) && \
-               S_ISREG(b.st_mode))
+       getopt32(argv, "^" "a" "\0" "-1"/*at least one arg*/);
+       argv += optind;
 
-               argv++;
-               path_n = path_list;
-               buf = *argv;
+       do {
+               int missing = 1;
 
-               /* if filename is either absolute or contains slashes,
-                * stat it */
-               if (strchr(buf, '/') != NULL && is_executable_file(buf, stat_b)) {
-                       found = 1;
+               /* If file contains a slash don't use PATH */
+               if (strchr(*argv, '/')) {
+                       if (file_is_executable(*argv)) {
+                               missing = 0;
+                               puts(*argv);
+                       }
                } else {
-                       /* Couldn't access file and file doesn't contain slashes */
-                       for (i = 0; i < count; i++) {
-                               buf = concat_path_file(path_n, *argv);
-                               if (is_executable_file(buf, stat_b)) {
-                                       found = 1;
+                       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;
-                               }
-                               free(buf);
-                               path_n += (bb_strlen(path_n) + 1);
                        }
                }
-               if (found) {
-                       puts(buf);
-               } else {
-                       status = EXIT_FAILURE;
-               }
-       }
-       bb_fflush_stdout_and_exit(status);
-}
+               status |= missing;
+       } while (*++argv);
 
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+       return status;
+}