Merge branch 'master' into squeeze
[debian/amanda] / ndmp-src / ndma_data_pfe.c
diff --git a/ndmp-src/ndma_data_pfe.c b/ndmp-src/ndma_data_pfe.c
new file mode 100644 (file)
index 0000000..98631a7
--- /dev/null
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 1998,1999,2000
+ *     Traakan, Inc., Los Altos, CA
+ *     All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Project:  NDMJOB
+ * Ident:    $Id: $
+ *
+ * Description:
+ *
+ */
+
+
+#include "ndmagents.h"
+
+#ifndef NDMOS_OPTION_NO_DATA_AGENT
+
+
+int
+ndmda_pipe_fork_exec (struct ndm_session *sess, char *cmd, int is_backup)
+{
+       struct ndm_data_agent * da = &sess->data_acb;
+       struct ndmchan *        ch;
+       int                     errpipe[2];
+       int                     datpipe[2];
+       int                     wrppipe[2];
+       int                     nullfd;
+       int                     rc = -1;
+
+       ndmalogf (sess, 0, 2, "Starting %s", cmd);
+
+       nullfd = open ("/dev/null", 2);
+       if (nullfd < 0) {
+               return rc;
+       }
+
+       rc = pipe (errpipe);
+       if (rc < 0) {
+               close (nullfd);
+               return rc;
+       }
+
+       rc = pipe (datpipe);
+       if (rc < 0) {
+               close (nullfd);
+               close (errpipe[0]);
+               close (errpipe[1]);
+               return rc;
+       }
+
+       rc = pipe (wrppipe);
+       if (rc < 0) {
+               close (nullfd);
+               close (errpipe[0]);
+               close (errpipe[1]);
+               close (datpipe[0]);
+               close (datpipe[1]);
+               return rc;
+       }
+
+       rc = fork();
+       if (rc < 0) {
+               close (nullfd);
+               close (errpipe[0]);
+               close (errpipe[1]);
+               close (datpipe[0]);
+               close (datpipe[1]);
+               close (wrppipe[0]);
+               close (wrppipe[1]);
+               return rc;
+       }
+
+       if (rc == 0) {
+               /* child */
+               dup2 (errpipe[1], 2);
+               dup2 (wrppipe[1], 3);
+               close (errpipe[0]);
+               close (wrppipe[0]);
+
+               if (is_backup) {
+                       dup2 (nullfd, 0);
+                       dup2 (datpipe[1], 1);
+                       close (datpipe[0]);
+               } else {
+                       dup2 (datpipe[0], 0);
+                       dup2 (nullfd, 1);
+                       close (datpipe[1]);
+               }
+
+               /*
+                * 0 -- formatter stdin
+                * 1 -- formatter stdout
+                * 2 -- formatter stderr
+                * 3 -- formatter wrap chan (wraplib.c)
+                */
+               for (rc = 4; rc < 100; rc++) {
+                       close(rc);
+               }
+
+               execl ("/bin/sh", "sh", "-c", cmd, NULL);
+
+               fprintf (stderr, "EXEC FAILED %s\n", cmd);
+               exit(127);
+       }
+
+       /* parent */
+       close (nullfd);
+
+       ch = &da->formatter_error;
+       ndmchan_initialize (ch, "dfp-error");
+       ndmchan_setbuf (ch, da->fmt_error_buf, sizeof da->fmt_error_buf);
+       close (errpipe[1]);
+       ndmos_condition_pipe_fd (sess, errpipe[0]);
+       ndmchan_start_read (ch, errpipe[0]);
+
+       ch = &da->formatter_wrap;
+       ndmchan_initialize (ch, "dfp-wrap");
+       ndmchan_setbuf (ch, da->fmt_wrap_buf, sizeof da->fmt_wrap_buf);
+       close (wrppipe[1]);
+       ndmos_condition_pipe_fd (sess, wrppipe[0]);
+       ndmchan_start_read (ch, wrppipe[0]);
+
+       ch = &da->formatter_image;
+       ndmchan_initialize (ch, "dfp-image");
+       ndmchan_setbuf (ch, da->fmt_image_buf, sizeof da->fmt_image_buf);
+
+       if (is_backup) {
+               ndmalogf (sess, 0, 2, "backup...");
+               close (datpipe[1]);
+               ndmos_condition_pipe_fd (sess, datpipe[0]);
+               ndmchan_start_read (ch, datpipe[0]);
+       } else {
+               ndmalogf (sess, 0, 2, "recover...");
+               close (datpipe[0]);
+               ndmos_condition_pipe_fd (sess, datpipe[1]);
+               ndmchan_start_write (ch, datpipe[1]);
+       }
+
+       da->formatter_pid = rc;
+
+       return rc;      /* PID */
+}
+
+int
+ndmda_add_to_cmd_with_escapes (char *cmd, char *word, char *special)
+{
+       char *          cmd_lim = &cmd[NDMDA_MAX_CMD-3];
+       char *          p;
+       int             c;
+
+       p = cmd;
+       while (*p) p++;
+       if (p != cmd) *p++ = ' ';
+
+       while ((c = *word++) != 0) {
+               if (p >= cmd_lim)
+                       return -1;      /* overflow */
+               if (c == '\\' || strchr (special, c))
+                       *p++ = '\\';
+               *p++ = c;
+       }
+       *p = 0;
+
+       return 0;
+}
+
+int
+ndmda_add_to_cmd (char *cmd, char *word)
+{
+       return ndmda_add_to_cmd_with_escapes (cmd, word, " \t`'\"*?[]$");
+}
+
+int
+ndmda_add_to_cmd_allow_file_wildcards (char *cmd, char *word)
+{
+       return ndmda_add_to_cmd_with_escapes (cmd, word, " \t`'\"$");
+}
+
+#endif /* !NDMOS_OPTION_NO_DATA_AGENT */