util-vserver-0.30.208

[util-vserver.git] / src / chain-echo.c

diff --git a/src/chain-echo.c b/src/chain-echo.c
new file mode 100644 (file)
index 0000000..4965ae2
--- /dev/null
+++ b/src/chain-echo.c
@@ -0,0 +1,86 @@
+// $Id: chain-echo.c,v 1.1 2004/04/20 17:54:40 ensc Exp $    --*- c -*--
+
+// Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//  
+// 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; version 2 of the License.
+//  
+// 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 program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+#include "util.h"
+
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define ENSC_WRAPPERS_PREFIX   "chain-echo: "
+#define ENSC_WRAPPERS_FCNTL    1
+#define ENSC_WRAPPERS_UNISTD   1
+#define ENSC_WRAPPERS_IO       1
+#include <wrappers.h>
+
+int    wrapper_exit_code = 255;
+
+static void
+showHelp(char const *cmd)
+{
+  WRITE_MSG(1, "Usage:  ");
+  WRITE_STR(1, cmd);
+  WRITE_MSG(1,
+           " [--] <file> <data> <command> <args>*\n\n"
+           "Please report bugs to " PACKAGE_BUGREPORT "\n");
+  exit(0);
+}
+
+static void
+showVersion()
+{
+  WRITE_MSG(1,
+           "chain-echo " VERSION " -- puts data into a file within a command-chain\n"
+           "This program is part of " PACKAGE_STRING "\n\n"
+           "Copyright (C) 2004 Enrico Scholz\n"
+           VERSION_COPYRIGHT_DISCLAIMER);
+  exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+  int          idx = 1;
+  int          fd;
+
+  if (argc>=2) {
+    if (strcmp(argv[1], "--help")   ==0) showHelp(argv[0]);
+    if (strcmp(argv[1], "--version")==0) showVersion();
+    if (strcmp(argv[1], "--")       ==0) ++idx;
+  }
+  
+  if (argc<idx+3) {
+    WRITE_MSG(2, "Not enough parameters; use '--help' for more information\n");
+   return wrapper_exit_code;
+  }
+
+  if (argv[idx][0]=='\0')
+    fd = 1;
+  else {
+    fd = Eopen(argv[idx], O_WRONLY|O_NOFOLLOW, 0600);
+    Efcntl(fd, F_SETFD, FD_CLOEXEC);
+  }
+
+  if (argv[idx+1][0]!='\0')
+    EwriteAll(fd, argv[idx+1], strlen(argv[idx+1]));
+
+  Eexecv(argv[idx+2], argv+idx+2);
+}