nfs-utils: convert rpc.nfsd to use xlog()
authorJeff Layton <jlayton@redhat.com>
Sat, 1 Aug 2009 10:27:40 +0000 (06:27 -0400)
committerSteve Dickson <steved@redhat.com>
Sat, 1 Aug 2009 10:27:40 +0000 (06:27 -0400)
...and add --debug and --syslog options.

With the switch to xlog(), it becomes trivial to add debug messages, so
add an option to turn them on when requested.

Also, rpc.nfsd isn't a proper daemon per-se, so it makes more sense to
log errors to stderr where possible. Usually init scripts take care of
redirecting stderr output to syslog anyway.

For those that don't, add a --syslog option that forces all output to go
to syslog instead. Note that even with this option, errors encountered
during option processing will still go to stderr.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
utils/nfsd/nfsd.c
utils/nfsd/nfssvc.c

index 183681b..1589a9f 100644 (file)
@@ -18,7 +18,6 @@
 #include <string.h>
 #include <errno.h>
 #include <getopt.h>
-#include <syslog.h>
 #include <netdb.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
@@ -26,6 +25,7 @@
 
 #include "nfslib.h"
 #include "nfssvc.h"
+#include "xlog.h"
 
 static void    usage(const char *);
 
@@ -38,6 +38,8 @@ static struct option longopts[] =
        { "no-udp", 0, 0, 'U' },
        { "port", 1, 0, 'P' },
        { "port", 1, 0, 'p' },
+       { "debug", 0, 0, 'd' },
+       { "syslog", 0, 0, 's' },
        { NULL, 0, 0, 0 }
 };
 unsigned int protobits = NFSCTL_ALLBITS;
@@ -51,7 +53,7 @@ main(int argc, char **argv)
        int     count = 1, c, error, port, fd, found_one;
        struct servent *ent;
        struct hostent *hp;
-       char *p;
+       char *p, *progname;
 
        ent = getservbyname ("nfs", "udp");
        if (ent != NULL)
@@ -59,8 +61,20 @@ main(int argc, char **argv)
        else
                port = 2049;
 
-       while ((c = getopt_long(argc, argv, "H:hN:p:P:TU", longopts, NULL)) != EOF) {
+       progname = strdup(basename(argv[0]));
+       if (!progname) {
+               fprintf(stderr, "%s: unable to allocate memory.\n", argv[0]);
+               exit(1);
+       }
+
+       xlog_syslog(0);
+       xlog_stderr(1);
+
+       while ((c = getopt_long(argc, argv, "dH:hN:p:P:sTU", longopts, NULL)) != EOF) {
                switch(c) {
+               case 'd':
+                       xlog_config(D_ALL, 1);
+                       break;
                case 'H':
                        if (inet_addr(optarg) != INADDR_NONE) {
                                haddr = strdup(optarg);
@@ -68,8 +82,8 @@ main(int argc, char **argv)
                                haddr = inet_ntoa((*(struct in_addr*)(hp->h_addr_list[0])));
                        } else {
                                fprintf(stderr, "%s: Unknown hostname: %s\n",
-                                       argv[0], optarg);
-                               usage(argv [0]);
+                                       progname, optarg);
+                               usage(progname);
                        }
                        break;
                case 'P':       /* XXX for nfs-server compatibility */
@@ -77,8 +91,8 @@ main(int argc, char **argv)
                        port = atoi(optarg);
                        if (port <= 0 || port > 65535) {
                                fprintf(stderr, "%s: bad port number: %s\n",
-                                       argv[0], optarg);
-                               usage(argv [0]);
+                                       progname, optarg);
+                               usage(progname);
                        }
                        break;
                case 'N':
@@ -97,6 +111,10 @@ main(int argc, char **argv)
                                exit(1);
                        }
                        break;
+               case 's':
+                       xlog_syslog(1);
+                       xlog_stderr(0);
+                       break;
                case 'T':
                        NFSCTL_TCPUNSET(protobits);
                        break;
@@ -106,14 +124,17 @@ main(int argc, char **argv)
                default:
                        fprintf(stderr, "Invalid argument: '%c'\n", c);
                case 'h':
-                       usage(argv[0]);
+                       usage(progname);
                }
        }
+
+       xlog_open(progname);
+
        /*
         * Do some sanity checking, if the ctlbits are set
         */
        if (!NFSCTL_UDPISSET(protobits) && !NFSCTL_TCPISSET(protobits)) {
-               fprintf(stderr, "invalid protocol specified\n");
+               xlog(L_ERROR, "invalid protocol specified");
                exit(1);
        }
        found_one = 0;
@@ -122,12 +143,12 @@ main(int argc, char **argv)
                        found_one = 1;
        }
        if (!found_one) {
-               fprintf(stderr, "no version specified\n");
+               xlog(L_ERROR, "no version specified");
                exit(1);
        }                       
 
        if (NFSCTL_VERISSET(versbits, 4) && !NFSCTL_TCPISSET(protobits)) {
-               fprintf(stderr, "version 4 requires the TCP protocol\n");
+               xlog(L_ERROR, "version 4 requires the TCP protocol");
                exit(1);
        }
        if (haddr == NULL) {
@@ -136,17 +157,15 @@ main(int argc, char **argv)
        }
 
        if (chdir(NFS_STATEDIR)) {
-               fprintf(stderr, "%s: chdir(%s) failed: %s\n",
-                       argv [0], NFS_STATEDIR, strerror(errno));
+               xlog(L_ERROR, "chdir(%s) failed: %m", NFS_STATEDIR);
                exit(1);
        }
 
        if (optind < argc) {
                if ((count = atoi(argv[optind])) < 0) {
                        /* insane # of servers */
-                       fprintf(stderr,
-                               "%s: invalid server count (%d), using 1\n",
-                               argv[0], count);
+                       xlog(L_ERROR, "invalid server count (%d), using 1",
+                                     count);
                        count = 1;
                }
        }
@@ -156,21 +175,21 @@ main(int argc, char **argv)
           everything before spawning kernel threads.  --Chip */
        fd = open("/dev/null", O_RDWR);
        if (fd == -1)
-               perror("/dev/null");
+               xlog(L_ERROR, "Unable to open /dev/null: %m");
        else {
+               /* switch xlog output to syslog since stderr is being closed */
+               xlog_syslog(1);
+               xlog_stderr(0);
                (void) dup2(fd, 0);
                (void) dup2(fd, 1);
                (void) dup2(fd, 2);
        }
        closeall(3);
 
-       openlog("nfsd", LOG_PID, LOG_DAEMON);
-       if ((error = nfssvc(port, count, versbits, minorvers4, protobits, haddr)) < 0) {
-               int e = errno;
-               syslog(LOG_ERR, "nfssvc: %s", strerror(e));
-               closelog();
-       }
+       if ((error = nfssvc(port, count, versbits, minorvers4, protobits, haddr)) < 0)
+               xlog(L_ERROR, "nfssvc: errno %d (%m)", errno);
 
+       free(progname);
        return (error != 0);
 }
 
@@ -178,7 +197,7 @@ static void
 usage(const char *prog)
 {
        fprintf(stderr, "Usage:\n"
-               "%s [-H hostname] [-p|-P|--port port] [-N|--no-nfs-version version ] [-T|--no-tcp] [-U|--no-udp] nrservs\n", 
+               "%s [-d|--debug] [-H hostname] [-p|-P|--port port] [-N|--no-nfs-version version ] [-s|--syslog] [-T|--no-tcp] [-U|--no-udp] nrservs\n", 
                prog);
        exit(2);
 }
index 6c5289a..0a7546a 100644 (file)
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
-#include <syslog.h>
-
 
 #include "nfslib.h"
+#include "xlog.h"
 
 #define NFSD_PORTS_FILE     "/proc/fs/nfsd/portlist"
 #define NFSD_VERS_FILE    "/proc/fs/nfsd/versions"
@@ -57,13 +56,13 @@ nfssvc_setfds(int port, unsigned int ctlbits, char *haddr)
        if (NFSCTL_UDPISSET(ctlbits)) {
                udpfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
                if (udpfd < 0) {
-                       syslog(LOG_ERR, "nfssvc: unable to create UPD socket: "
-                               "errno %d (%s)\n", errno, strerror(errno));
+                       xlog(L_ERROR, "unable to create UDP socket: "
+                               "errno %d (%m)", errno);
                        exit(1);
                }
                if (bind(udpfd, (struct  sockaddr  *)&sin, sizeof(sin)) < 0){
-                       syslog(LOG_ERR, "nfssvc: unable to bind UPD socket: "
-                               "errno %d (%s)\n", errno, strerror(errno));
+                       xlog(L_ERROR, "unable to bind UDP socket: "
+                               "errno %d (%m)", errno);
                        exit(1);
                }
        }
@@ -71,32 +70,32 @@ nfssvc_setfds(int port, unsigned int ctlbits, char *haddr)
        if (NFSCTL_TCPISSET(ctlbits)) {
                tcpfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
                if (tcpfd < 0) {
-                       syslog(LOG_ERR, "nfssvc: unable to createt tcp socket: "
-                               "errno %d (%s)\n", errno, strerror(errno));
+                       xlog(L_ERROR, "unable to create TCP socket: "
+                               "errno %d (%m)", errno);
                        exit(1);
                }
                if (setsockopt(tcpfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
-                       syslog(LOG_ERR, "nfssvc: unable to set SO_REUSEADDR: "
-                               "errno %d (%s)\n", errno, strerror(errno));
+                       xlog(L_ERROR, "unable to set SO_REUSEADDR: "
+                               "errno %d (%m)", errno);
                        exit(1);
                }
                if (bind(tcpfd, (struct  sockaddr  *)&sin, sizeof(sin)) < 0){
-                       syslog(LOG_ERR, "nfssvc: unable to bind TCP socket: "
-                               "errno %d (%s)\n", errno, strerror(errno));
+                       xlog(L_ERROR, "unable to bind TCP socket: "
+                               "errno %d (%m)", errno);
                        exit(1);
                }
                if (listen(tcpfd, 64) < 0){
-                       syslog(LOG_ERR, "nfssvc: unable to create listening socket: "
-                               "errno %d (%s)\n", errno, strerror(errno));
+                       xlog(L_ERROR, "unable to create listening socket: "
+                               "errno %d (%m)", errno);
                        exit(1);
                }
        }
        if (udpfd >= 0) {
                snprintf(buf, BUFSIZ,"%d\n", udpfd); 
                if (write(fd, buf, strlen(buf)) != strlen(buf)) {
-                       syslog(LOG_ERR, 
-                              "nfssvc: writing fds to kernel failed: errno %d (%s)", 
-                              errno, strerror(errno));
+                       xlog(L_ERROR, 
+                              "writing fds to kernel failed: errno %d (%m)", 
+                              errno);
                }
                close(fd);
                fd = -1;
@@ -106,9 +105,9 @@ nfssvc_setfds(int port, unsigned int ctlbits, char *haddr)
                        fd = open(NFSD_PORTS_FILE, O_WRONLY);
                snprintf(buf, BUFSIZ,"%d\n", tcpfd); 
                if (write(fd, buf, strlen(buf)) != strlen(buf)) {
-                       syslog(LOG_ERR, 
-                              "nfssvc: writing fds to kernel failed: errno %d (%s)", 
-                              errno, strerror(errno));
+                       xlog(L_ERROR, 
+                              "writing fds to kernel failed: errno %d (%m)", 
+                              errno);
                }
        }
        close(fd);
@@ -138,11 +137,11 @@ nfssvc_versbits(unsigned int ctlbits, int minorvers4)
                    off += snprintf(ptr+off, BUFSIZ - off, "%c4.%d",
                                    minorvers4 > 0 ? '+' : '-',
                                    n);
+       xlog(D_GENERAL, "Writing version string to kernel: %s", buf);
        snprintf(ptr+off, BUFSIZ - off, "\n");
-       if (write(fd, buf, strlen(buf)) != strlen(buf)) {
-               syslog(LOG_ERR, "nfssvc: Setting version failed: errno %d (%s)", 
-                       errno, strerror(errno));
-       }
+       if (write(fd, buf, strlen(buf)) != strlen(buf))
+               xlog(L_ERROR, "Setting version failed: errno %d (%m)", errno);
+
        close(fd);
 
        return;