From 78488dc84afac1398e582ae6bbaf9606d07afa1e Mon Sep 17 00:00:00 2001
From: John Denker <jsd@av8n.com>
Date: Sat, 2 Jun 2012 18:38:28 -0700
Subject: checkpassword ... as downloaded

---
 checkpasswd/pathexec_run.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 checkpasswd/pathexec_run.c

(limited to 'checkpasswd/pathexec_run.c')

diff --git a/checkpasswd/pathexec_run.c b/checkpasswd/pathexec_run.c
new file mode 100644
index 0000000..17837eb
--- /dev/null
+++ b/checkpasswd/pathexec_run.c
@@ -0,0 +1,46 @@
+#include "error.h"
+#include "stralloc.h"
+#include "str.h"
+#include "env.h"
+#include "pathexec.h"
+
+static stralloc tmp;
+
+void pathexec_run(char *file,char **argv,char **envp)
+{
+  char *path;
+  unsigned int split;
+  int savederrno;
+
+  if (file[str_chr(file,'/')]) {
+    execve(file,argv,envp);
+    return;
+  }
+
+  path = env_get("PATH");
+  if (!path) path = "/bin:/usr/bin";
+
+  savederrno = 0;
+  for (;;) {
+    split = str_chr(path,':');
+    if (!stralloc_copyb(&tmp,path,split)) return;
+    if (!split)
+      if (!stralloc_cats(&tmp,".")) return;
+    if (!stralloc_cats(&tmp,"/"))  return;
+    if (!stralloc_cats(&tmp,file)) return;
+    if (!stralloc_0(&tmp)) return;
+
+    execve(tmp.s,argv,envp);
+    if (errno != error_noent) {
+      savederrno = errno;
+      if ((errno != error_acces) && (errno != error_perm) && (errno != error_isdir)) return;
+    }
+
+    if (!path[split]) {
+      if (savederrno) errno = savederrno;
+      return;
+    }
+    path += split;
+    path += 1;
+  }
+}
-- 
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