move more files.

[apps/madmutt.git] / lib-sys / filter.c

diff --git a/lib-sys/filter.c b/lib-sys/filter.c
new file mode 100644 (file)
index 0000000..193b2ad
--- /dev/null
+++ b/lib-sys/filter.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright notice from original mutt:
+ * Copyright (C) 1996-2000 Michael R. Elkins.
+ *
+ * This file is part of mutt-ng, see http://www.muttng.org/.
+ * It's licensed under the GNU General Public License,
+ * please see the file GPL in the top level source directory.
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <stdio.h>
+
+#include "mutt_signal.h"
+#include "unix.h"
+
+/* Invokes a commmand on a pipe and optionally connects its stdin and stdout
+ * to the specified handles.
+ */
+pid_t
+mutt_create_filter_fd (const char *cmd, FILE ** in, FILE ** out, FILE ** err,
+                       int fdin, int fdout, int fderr)
+{
+  int pin[2], pout[2], perr[2], thepid;
+
+  if (in) {
+    *in = 0;
+    if (pipe (pin) == -1)
+      return (-1);
+  }
+
+  if (out) {
+    *out = 0;
+    if (pipe (pout) == -1) {
+      if (in) {
+        close (pin[0]);
+        close (pin[1]);
+      }
+      return (-1);
+    }
+  }
+
+  if (err) {
+    *err = 0;
+    if (pipe (perr) == -1) {
+      if (in) {
+        close (pin[0]);
+        close (pin[1]);
+      }
+      if (out) {
+        close (pout[0]);
+        close (pout[1]);
+      }
+      return (-1);
+    }
+  }
+
+  mutt_block_signals_system ();
+
+  if ((thepid = fork ()) == 0) {
+    mutt_unblock_signals_system (0);
+
+    if (in) {
+      close (pin[1]);
+      dup2 (pin[0], 0);
+      close (pin[0]);
+    }
+    else if (fdin != -1) {
+      dup2 (fdin, 0);
+      close (fdin);
+    }
+
+    if (out) {
+      close (pout[0]);
+      dup2 (pout[1], 1);
+      close (pout[1]);
+    }
+    else if (fdout != -1) {
+      dup2 (fdout, 1);
+      close (fdout);
+    }
+
+    if (err) {
+      close (perr[0]);
+      dup2 (perr[1], 2);
+      close (perr[1]);
+    }
+    else if (fderr != -1) {
+      dup2 (fderr, 2);
+      close (fderr);
+    }
+
+    execl ("/bin/sh", "sh", "-c", cmd, NULL);
+    _exit (127);
+  }
+  else if (thepid == -1) {
+    mutt_unblock_signals_system (1);
+
+    if (in) {
+      close (pin[0]);
+      close (pin[1]);
+    }
+
+    if (out) {
+      close (pout[0]);
+      close (pout[1]);
+    }
+
+    if (err) {
+      close (perr[0]);
+      close (perr[1]);
+    }
+
+    return (-1);
+  }
+
+  if (out) {
+    close (pout[1]);
+    *out = fdopen (pout[0], "r");
+  }
+
+  if (in) {
+    close (pin[0]);
+    *in = fdopen (pin[1], "w");
+  }
+
+  if (err) {
+    close (perr[1]);
+    *err = fdopen (perr[0], "r");
+  }
+
+  return (thepid);
+}
+
+pid_t mutt_create_filter (const char *s, FILE ** in, FILE ** out, FILE ** err)
+{
+  return (mutt_create_filter_fd (s, in, out, err, -1, -1, -1));
+}
+
+int mutt_wait_filter (pid_t pid)
+{
+  int rc;
+
+  waitpid (pid, &rc, 0);
+  mutt_unblock_signals_system (1);
+  rc = WIFEXITED (rc) ? WEXITSTATUS (rc) : -1;
+
+  return rc;
+}