1 files changed, 90 insertions, 0 deletions
diff --git a/debianutils/which.c b/debianutils/which.c
new file mode 100644
index 0000000..748e6dc
--- /dev/null
+++ b/debianutils/which.c
@@ -0,0 +1,90 @@
+/* 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 or later, see the file LICENSE in this tarball.
+ *
+ * Based on which from debianutils
+ */
+
+#include "libbb.h"
+
+int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int which_main(int argc UNUSED_PARAM, char **argv)
+{
+	USE_DESKTOP(int opt;)
+	int status = EXIT_SUCCESS;
+	char *path;
+	char *p;
+
+	opt_complementary = "-1"; /* at least one argument */
+	USE_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_DESKTOP
+/* Much bloat just to support -a */
+		if (strchr(*argv, '/')) {
+			if (execable_file(*argv)) {
+				puts(*argv);
+				continue;
+			}
+			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, '/')) {
+			if (execable_file(*argv)) {
+				puts(*argv);
+				continue;
+			}
+		} 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);
+}