implement pdf export / import

implement pdf export / import

1 files changed, 76 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..f33c1b4
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,76 @@
+/* 
+ * "$Id: util.c,v 1.1 2005/02/28 17:56:51 hofmann Exp $"
+ *
+ * flpsed program.
+ *
+ * Copyright 2005 by Johannes Hofmann
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *  
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "util.h"
+
+FILE *
+pexecvp(const char *file, char *const argv[], pid_t *pid, char *type) {
+  FILE *iop;
+  int   pdes[2];
+
+  if (pipe(pdes) < 0) {
+    return NULL;
+  }
+	
+  *pid = vfork();
+
+  if (*pid == -1) {
+    perror("vfork");
+    close(pdes[0]);
+    close(pdes[1]);
+    return NULL;
+  } else if (*pid == 0) {
+    /* child */
+    
+    if (*type == 'r') {
+      close(pdes[0]);
+      if (pdes[1] != STDOUT_FILENO) {
+	dup2(pdes[1], STDOUT_FILENO);
+	close(pdes[1]);
+      }
+    } else {
+      close(pdes[1]);
+      if (pdes[0] != STDIN_FILENO) {
+	dup2(pdes[0], STDIN_FILENO);
+	close(pdes[0]);
+      }
+    }
+
+    execvp(file, argv);
+    exit(127);
+  } else {
+    /* parent */ 
+    if (*type == 'r') {
+      iop = fdopen(pdes[0], "r");
+      close(pdes[1]);
+    } else {
+      iop = fdopen(pdes[1], "w");
+      close(pdes[0]);
+    }
+    return iop;
+  }
+}