2001-11-26 Chip Salzenberg <chip@pobox.com>

[nfs-utils.git] / utils / nfsd / nfsd.c

diff --git a/utils/nfsd/nfsd.c b/utils/nfsd/nfsd.c
index c1cb56fe46db0e8e276bccecdbb3532a42cf5fbc..772f72df54693751550eac1c9fbe978d427720b9 100644 (file)
--- a/utils/nfsd/nfsd.c
+++ b/utils/nfsd/nfsd.c
@@ -12,9 +12,11 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <fcntl.h>
 #include <string.h>
 #include <errno.h>
 #include <getopt.h>
+#include <syslog.h>
 #include "nfslib.h"
 
 static void    usage(const char *);
@@ -22,7 +24,7 @@ static void   usage(const char *);
 int
 main(int argc, char **argv)
 {
-       int     count = 1, c, error, port;
+       int     count = 1, c, error, port, fd;
 
        port = 2049;
 
@@ -62,8 +64,28 @@ main(int argc, char **argv)
                }
        }
 
-       if ((error = nfssvc(port, count)) < 0)
-               perror("nfssvc");
+       /* KLUDGE ALERT:
+          Some kernels let nfsd kernel threads inherit open files
+          from the program that spawns them (i.e. us).  So close
+          everything before spawning kernel threads.  --Chip */
+       fd = open("/dev/null", O_RDWR);
+       if (fd == -1)
+               perror("/dev/null");
+       else {
+               (void) dup2(fd, 0);
+               (void) dup2(fd, 1);
+               (void) dup2(fd, 2);
+       }
+       fd = sysconf(_SC_OPEN_MAX);
+       while (--fd > 2)
+               (void) close(fd);
+
+       if ((error = nfssvc(port, count)) < 0) {
+               int e = errno;
+               openlog("nfsd", LOG_PID, LOG_DAEMON);
+               syslog(LOG_ERR, "nfssvc: %s", strerror(e));
+               closelog();
+       }
 
        return (error != 0);
 }