Add gss support from citi @ umich

[nfs-utils.git] / utils / gssd / gss_clnt_send_err.c

diff --git a/utils/gssd/gss_clnt_send_err.c b/utils/gssd/gss_clnt_send_err.c
new file mode 100644 (file)
index 0000000..5260b53
--- /dev/null
+++ b/utils/gssd/gss_clnt_send_err.c
@@ -0,0 +1,104 @@
+/*
+  Copyright (c) 2000 The Regents of the University of Michigan.
+  All rights reserved.
+
+  Copyright (c) 2004 Bruce Fields <bfields@umich.edu>
+
+  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, 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.
+  3. Neither the name of the University nor the names of its
+     contributors may be used to endorse or promote products derived
+     from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED ``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 REGENTS 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.
+*/
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <rpc/rpc.h>
+
+#include <unistd.h>
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pwd.h>
+#include <fcntl.h>
+
+#include "gssd.h"
+#include "write_bytes.h"
+
+char pipefsdir[PATH_MAX] = GSSD_PIPEFS_DIR;
+
+static void
+usage(char *progname)
+{
+       fprintf(stderr, "usage: %s clntdir user [user ...]\n", progname);
+       exit(1);
+}
+
+static int
+do_error_downcall(int k5_fd, uid_t uid, int err)
+{
+       char    buf[1024];
+       char    *p = buf, *end = buf + 1024;
+       unsigned int timeout = 0;
+       int     zero = 0;
+
+       if (WRITE_BYTES(&p, end, uid)) return -1;
+       if (WRITE_BYTES(&p, end, timeout)) return -1;
+       /* use seq_win = 0 to indicate an error: */
+       if (WRITE_BYTES(&p, end, zero)) return -1;
+       if (WRITE_BYTES(&p, end, err)) return -1;
+
+       if (write(k5_fd, buf, p - buf) < p - buf) return -1;
+       return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+       int fd;
+       int i;
+       uid_t uid;
+       char *endptr;
+       struct passwd *pw;
+
+       if (argc < 3)
+               usage(argv[0]);
+       fd = open(argv[1], O_WRONLY);
+       if (fd == -1)
+               err(1, "unable to open %s", argv[1]);
+
+       for (i = 2; i < argc; i++) {
+               uid = strtol(argv[i], &endptr, 10);
+               if (*endptr != '\0') {
+                       pw = getpwnam(argv[i]);
+                       if (!pw)
+                               err(1, "unknown user %s", argv[i]);
+                       uid = pw->pw_uid;
+               }
+               if (do_error_downcall(fd, uid, -1))
+                       err(1, "failed to destroy cred for user %s", argv[i]);
+       }
+       exit(0);
+}