(x)dvipdfmx: Fix more bugs in exec_spawn()

git-svn-id: svn://tug.org/texlive/trunk@22764 c570f23f-e606-0410-a88d-b1316a301751

2 files changed, 21 insertions, 20 deletions

diff --git a/Build/source/texk/dvipdfmx/ChangeLog b/Build/source/texk/dvipdfmx/ChangeLog
index 48e5bc3f654..72070a25acd 100644
--- a/Build/source/texk/dvipdfmx/ChangeLog
+++ b/Build/source/texk/dvipdfmx/ChangeLog
@@ -1,3 +1,7 @@
+2011-06-03  Peter Breitenlohner  <peb@mppmu.mpg.de>
+
+	* dpxfile.c (exec_spawn): Exit if execvp() fails, some clean up.
+
 2011-06-03  Akira Kakuto  <kakuto@fuk.kindai.ac.jp>
 
 	* dpxfile.c: fix a bug in exec_spawn().
diff --git a/Build/source/texk/dvipdfmx/dvipdfmx-20110311/src/dpxfile.c b/Build/source/texk/dvipdfmx/dvipdfmx-20110311/src/dpxfile.c
index 16c81eaf503..dbbf077989c 100644
--- a/Build/source/texk/dvipdfmx/dvipdfmx-20110311/src/dpxfile.c
+++ b/Build/source/texk/dvipdfmx/dvipdfmx-20110311/src/dpxfile.c
@@ -155,9 +155,13 @@ static int exec_spawn (char *cmd)
   char **cmdv, **qv;
   char *p, *pp;
   char buf[1024];
-  int  i, ret;
+  int  i, ret = -1;
 
-  if (!cmd || !*cmd)
+  if (!cmd)
+    return -1;
+  while (*cmd == ' ' || *cmd == '\t')
+    cmd++;
+  if (*cmd == '\0')
     return -1;
   i = 0;
   p = cmd;
@@ -166,19 +170,16 @@ static int exec_spawn (char *cmd)
       i++;
     p++;
   }
-  cmdv = (char **) xmalloc (sizeof (char *) * (i+2));
+  cmdv = xcalloc (i + 2, sizeof (char *));
   p = cmd;
   qv = cmdv;
-  while (*p == ' ' || *p == '\t')
-    p++;
   while (*p) {
     pp = buf;
     if (*p == '"') {
       p++;
       while (*p != '"') {
         if (*p == '\0') {
-          free (cmdv);
-          return -1;
+          goto done;
         }
         *pp++ = *p++;
       }
@@ -187,8 +188,7 @@ static int exec_spawn (char *cmd)
       p++;
       while (*p != '\'') {
         if (*p == '\0') {
-          free (cmdv);
-          return -1;
+          goto done;
         }
         *pp++ = *p++;
       }
@@ -199,8 +199,7 @@ static int exec_spawn (char *cmd)
           p++;
           while (*p != '\'') {
              if (*p == '\0') {
-                 free (cmdv);
-                 return -1;
+                 goto done;
              }
              *pp++ = *p++;
           }
@@ -211,7 +210,7 @@ static int exec_spawn (char *cmd)
       }
     }
     *pp = '\0';
-    if ((pp = strchr (buf, ' ')) || (pp = strchr (buf, '\t'))) {
+    if (strchr (buf, ' ') || strchr (buf, '\t')) {
 #ifdef WIN32
       *qv = concat3 ("\"", buf, "\"");
 #else
@@ -227,7 +226,6 @@ static int exec_spawn (char *cmd)
       p++;
     qv++;
   }
-  *qv = NULL;
 #ifdef WIN32
   ret = spawnvp (_P_WAIT, *cmdv, (const char* const*) cmdv);
 #else
@@ -236,7 +234,7 @@ static int exec_spawn (char *cmd)
     ret = -1;
   else if (i == 0) {
     if (execvp (*cmdv, cmdv))
-      ret = -1;
+      _exit (-1);
   } else {
     if (wait (&ret) == i) {
       ret = (WIFEXITED (ret) ? WEXITSTATUS (ret) : -1);
@@ -245,14 +243,13 @@ static int exec_spawn (char *cmd)
     }
   }
 #endif
+done:
   qv = cmdv;
-  if (qv) {
-    while (*qv) {
-      free (*qv);
-      qv++;
-    }
-    free (cmdv);
+  while (*qv) {
+    free (*qv);
+    qv++;
   }
+  free (cmdv);
   return ret;
 }