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/* 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 GPLv2 or later, see file LICENSE in this source tree.
*
* Based on which from debianutils
*/
//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"
#if ENABLE_PLATFORM_MINGW32
static char *win32_execable_file(const char *p)
{
char *path;
int len = strlen(p) + 5;
if ( (path=malloc(len)) != NULL ) {
memcpy(path, p, len);
memcpy(path+len, ".exe", 5);
if (execable_file(path)) {
return path;
}
memcpy(path+len, ".com", 5);
if (execable_file(path)) {
return path;
}
free(path);
}
return NULL;
}
#endif
int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int which_main(int argc UNUSED_PARAM, char **argv)
{
IF_DESKTOP(int opt;)
int status = EXIT_SUCCESS;
char *path;
char *p;
opt_complementary = "-1"; /* at least one argument */
IF_DESKTOP(opt =) getopt32(argv, "a");
argv += optind;
/* This matches what is seen on e.g. ubuntu.
* "which" there is a shell script. */
path = getenv("PATH");
if (!path) {
path = (char*)bb_PATH_root_path;
putenv(path);
path += 5; /* skip "PATH=" */
}
do {
#if ENABLE_FEATURE_PREFER_APPLETS
if ( find_applet_by_name(*argv) >= 0 ) {
puts(*argv);
IF_DESKTOP(if ( !opt ))
continue;
}
#endif
#if ENABLE_DESKTOP
/* Much bloat just to support -a */
if (strchr(*argv, '/') || (ENABLE_PLATFORM_MINGW32 && strchr(*argv, '\\'))) {
if (execable_file(*argv)) {
puts(*argv);
continue;
}
#if ENABLE_PLATFORM_MINGW32
else if ((p=win32_execable_file(*argv)) != NULL) {
puts(p);
free(p);
continue;
}
#endif
status = EXIT_FAILURE;
} else {
char *path2 = xstrdup(path);
char *tmp = path2;
p = find_execable(*argv, &tmp);
if (!p)
status = EXIT_FAILURE;
else {
print:
puts(p);
free(p);
if (opt) {
/* -a: show matches in all PATH components */
if (tmp) {
p = find_execable(*argv, &tmp);
if (p)
goto print;
}
}
}
free(path2);
}
#else
/* Just ignoring -a */
if (strchr(*argv, '/') || (ENABLE_PLATFORM_MINGW32 && strchr(*argv, '\\'))) {
if (execable_file(*argv)) {
puts(*argv);
continue;
}
#if ENABLE_PLATFORM_MINGW32
else if ((p=win32_execable_file(*argv)) != NULL) {
puts(p);
free(p);
continue;
}
#endif
} else {
char *path2 = xstrdup(path);
char *tmp = path2;
p = find_execable(*argv, &tmp);
free(path2);
if (p) {
puts(p);
free(p);
continue;
}
}
status = EXIT_FAILURE;
#endif
} while (*(++argv) != NULL);
fflush_stdout_and_exit(status);
}
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