From 5cb46485dd5c752b6db9ad54b6a5621a7bcf14e0 Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Thu, 12 Oct 2006 06:12:11 +0000
Subject: execable.c: forgot to do "svn add" again...
---
libbb/execable.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 libbb/execable.c
(limited to 'libbb')
diff --git a/libbb/execable.c b/libbb/execable.c
new file mode 100644
index 000000000..cb56b9181
--- /dev/null
+++ b/libbb/execable.c
@@ -0,0 +1,62 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+/* check if path points to an executable file;
+ * return 1 if found;
+ * return 0 otherwise;
+ */
+int execable_file(const char *name)
+{
+ struct stat s;
+ return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode));
+}
+
+/* search $PATH for an executable file;
+ * return allocated string containing full path if found;
+ * return NULL otherwise;
+ */
+char *find_execable(const char *filename)
+{
+ char *path, *p, *n;
+
+ p = path = xstrdup(getenv("PATH") ? : "");
+ while (p) {
+ n = strchr(p, ':');
+ if (n)
+ *n++ = '\0';
+ if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
+ p = concat_path_file(p, filename);
+ if (execable_file(p)) {
+ free(path);
+ return p;
+ }
+ free(p);
+ }
+ p = n;
+ }
+ free(path);
+ return NULL;
+}
+
+/* search $PATH for an executable file;
+ * return 1 if found;
+ * return 0 otherwise;
+ */
+int exists_execable(const char *filename)
+{
+ char *ret = find_execable(filename);
+ if (ret) {
+ free(ret);
+ return 1;
+ }
+ return 0;
+}
+
--
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