From ccb423ed6f317da5a02f4feeda082d791215a4ba Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Wed, 14 Feb 2018 17:16:53 +0000
Subject:  Add execvep_loose, prepare for 2.6.4.0

---
 src/libposixplz/execvep.c           | 33 ++++-----------------------------
 src/libposixplz/execvep_internal.c  | 37 +++++++++++++++++++++++++++++++++++++
 src/libposixplz/execvep_loose.c     | 13 +++++++++++++
 src/libposixplz/posixplz-internal.h |  8 ++++++++
 4 files changed, 62 insertions(+), 29 deletions(-)
 create mode 100644 src/libposixplz/execvep_internal.c
 create mode 100644 src/libposixplz/execvep_loose.c
 create mode 100644 src/libposixplz/posixplz-internal.h

(limited to 'src/libposixplz')

diff --git a/src/libposixplz/execvep.c b/src/libposixplz/execvep.c
index acdf11f..461f238 100644
--- a/src/libposixplz/execvep.c
+++ b/src/libposixplz/execvep.c
@@ -2,38 +2,13 @@
 
 #include <unistd.h>
 #include <string.h>
-#include <errno.h>
-#include <skalibs/bytestr.h>
 #include <skalibs/posixplz.h>
+#include "posixplz-internal.h"
 
 void execvep (char const *file, char const *const *argv, char const *const *envp, char const *path)
 {
-  if (!path) errno = EINVAL ;
-  else if (file[str_chr(file, '/')])
-    execve(file, (char *const *)argv, (char *const *)envp) ; /* execve prototype sucks */
+  if (strchr(file, '/'))
+    execve(file, (char *const *)argv, (char *const *)envp) ;
   else
-  {
-    size_t pathlen = strlen(path) + 1 ;
-    size_t filelen = strlen(file) ;
-    int savederrno = 0 ;
-    while (pathlen)
-    {
-      size_t split = byte_chr(path, pathlen - 1, ':') ;
-      if (split)
-      {
-        char tmp[split + 2 + filelen] ;
-        memcpy(tmp, path, split) ;
-        tmp[split] = '/' ;
-        memcpy(tmp + split + 1, file, filelen + 1) ;
-        execve(tmp, (char *const *)argv, (char *const *)envp) ;
-        if (errno != ENOENT)
-        {
-          savederrno = errno ;
-          if ((errno != EACCES) && (errno != EPERM) && (errno != EISDIR)) break ;
-        }
-      }
-      path += split+1 ; pathlen -= split+1 ;
-    }
-    if (savederrno) errno = savederrno ;
-  }
+    execvep_internal(file, argv, envp, path) ;
 }
diff --git a/src/libposixplz/execvep_internal.c b/src/libposixplz/execvep_internal.c
new file mode 100644
index 0000000..17858f0
--- /dev/null
+++ b/src/libposixplz/execvep_internal.c
@@ -0,0 +1,37 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/posixplz.h>
+
+void execvep_internal (char const *file, char const *const *argv, char const *const *envp, char const *path)
+{
+  if (!path) errno = EINVAL ;
+  else
+  {
+    size_t pathlen = strlen(path) + 1 ;
+    size_t filelen = strlen(file) ;
+    int savederrno = 0 ;
+    while (pathlen)
+    {
+      size_t split = byte_chr(path, pathlen - 1, ':') ;
+      if (split)
+      {
+        char tmp[split + 2 + filelen] ;
+        memcpy(tmp, path, split) ;
+        tmp[split] = '/' ;
+        memcpy(tmp + split + 1, file, filelen + 1) ;
+        execve(tmp, (char *const *)argv, (char *const *)envp) ;
+        if (errno != ENOENT)
+        {
+          savederrno = errno ;
+          if ((errno != EACCES) && (errno != EPERM) && (errno != EISDIR)) break ;
+        }
+      }
+      path += split+1 ; pathlen -= split+1 ;
+    }
+    if (savederrno) errno = savederrno ;
+  }
+}
diff --git a/src/libposixplz/execvep_loose.c b/src/libposixplz/execvep_loose.c
new file mode 100644
index 0000000..7506362
--- /dev/null
+++ b/src/libposixplz/execvep_loose.c
@@ -0,0 +1,13 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <skalibs/posixplz.h>
+#include "posixplz-internal.h"
+
+void execvep_loose (char const *file, char const *const *argv, char const *const *envp, char const *path)
+{
+  if (file[0] == '/')
+    execve(file, (char *const *)argv, (char *const *)envp) ;
+  else
+    execvep_internal(file, argv, envp, path) ;
+}
diff --git a/src/libposixplz/posixplz-internal.h b/src/libposixplz/posixplz-internal.h
new file mode 100644
index 0000000..c3da73a
--- /dev/null
+++ b/src/libposixplz/posixplz-internal.h
@@ -0,0 +1,8 @@
+/* ISC license. */
+
+#ifndef POSIXPLZ_INTERNAL_H
+#define POSIXPLZ_INTERNAL_H
+
+extern void execvep_internal (char const *, char const *const *, char const *const *, char const *) ;
+
+#endif
-- 
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