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_env.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 checkpasswd/pathexec_env.c

(limited to 'checkpasswd/pathexec_env.c')

diff --git a/checkpasswd/pathexec_env.c b/checkpasswd/pathexec_env.c
new file mode 100644
index 0000000..48bba7e
--- /dev/null
+++ b/checkpasswd/pathexec_env.c
@@ -0,0 +1,68 @@
+#include "stralloc.h"
+#include "alloc.h"
+#include "str.h"
+#include "byte.h"
+#include "env.h"
+#include "pathexec.h"
+
+static stralloc plus;
+static stralloc tmp;
+
+int pathexec_env(char *s,char *t)
+{
+  if (!s) return 1;
+  if (!stralloc_copys(&tmp,s)) return 0;
+  if (t) {
+    if (!stralloc_cats(&tmp,"=")) return 0;
+    if (!stralloc_cats(&tmp,t)) return 0;
+  }
+  if (!stralloc_0(&tmp)) return 0;
+  return stralloc_cat(&plus,&tmp);
+}
+
+void pathexec(char **argv)
+{
+  char *path;
+  char **e;
+  unsigned int elen;
+  unsigned int i;
+  unsigned int j;
+  unsigned int split;
+  unsigned int t;
+
+  if (!stralloc_cats(&plus,"")) return;
+
+  elen = 0;
+  for (i = 0;environ[i];++i)
+    ++elen;
+  for (i = 0;i < plus.len;++i)
+    if (!plus.s[i])
+      ++elen;
+
+  e = (char **) alloc((elen + 1) * sizeof(char *));
+  if (!e) return;
+
+  elen = 0;
+  for (i = 0;environ[i];++i)
+    e[elen++] = environ[i];
+
+  j = 0;
+  for (i = 0;i < plus.len;++i)
+    if (!plus.s[i]) {
+      split = str_chr(plus.s + j,'=');
+      for (t = 0;t < elen;++t)
+	if (byte_equal(plus.s + j,split,e[t]))
+	  if (e[t][split] == '=') {
+	    --elen;
+	    e[t] = e[elen];
+	    break;
+	  }
+      if (plus.s[j + split])
+	e[elen++] = plus.s + j;
+      j = i + 1;
+    }
+  e[elen] = 0;
+
+  pathexec_run(*argv,argv,e);
+  alloc_free(e);
+}
-- 
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