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* Copyright 2005, Scott Balneaves <sbalneav@ltsp.org>
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* Mainline handling for the Linux Terminal Server Project File Server Daemon.
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "ltspfsd_functions.h"
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int debug; /* Debug level. 0 = no debug */
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int readonly; /* If true, make filesystem "read only" */
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int noauth; /* If true, skip authentication */
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int syslogopen; /* If true, then log to syslog, else stderr */
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char *mountpoint; /* Point we're "mounted" to */
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int authenticated; /* Mountpoint length */
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int mounted; /* Automounter status */
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* Signal handler function for SIGCHLD
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pid = wait(&stat); /* reap our child process */
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* Signal handler function for SIGTERM
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info("Recieved SIGTERM, shutting down\n");
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int main(int argc, char *argv[])
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int sockfd, newsockfd, childpid;
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struct sockaddr_in cli_addr;
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* We can begin to parse command line options.
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debug = readonly = opterr = noauth = 0;
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while ((c = getopt (argc, argv, "rad")) != -1) {
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fprintf (stderr, "Unknown option character `\\x%x'.\n", optopt);
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* Some initialization work. We call daemon(), which will chdir to /
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* so that the daemon won't lock any filesystems. The daemon() call also
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* closes STDIN, STDOUT, and STDERR, and forks. Then, set up our umask,
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* and redirect the SIGCHLD and SIGTERM signals to handlers.
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if (!debug) { /* if debug's false, then background */
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signal(SIGCHLD, sig_chld);
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signal(SIGTERM, sig_term);
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openlog(argv[0], LOG_PID, LOG_USER);
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sockfd = bindsocket(SERVER_PORT);
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* Log informational message to indicate program starting
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info("Program started\n");
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* Calculate the length of the cli_addr structure (needed for the accept)
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clilen = sizeof(cli_addr);
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* Accept incoming connection
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newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
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error_die("Can't accept connection");
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if (!debug) /* In debug mode, don't fork */
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error_die("fork error"); /* If fork fails, something's wrong */
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else if (childpid == 0) {
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close(sockfd); /* Child process, pass work off */
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handle_connection(newsockfd);
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exit(OK); /* exit child, SIGCHLD sent */
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close(newsockfd); /* parent */
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return OK; /* return 0 from main */
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* handle_connection is where the "work" gets done. Anything you want to "do"
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* as a network daemon should be done here.
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* Dispatch ltspfs calls to ltspfs_dispatch.
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void handle_connection(int sockfd)
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char line[LTSP_MAXBUF];
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fd_set set; /* For select */
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struct timeval automount_timeout; /* Timeout */
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FD_SET(sockfd, &set);
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xdrmem_create(&in, line, LTSP_MAXBUF, XDR_DECODE);
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* Sigh. I really hate to have to re-duplicate most of the readn
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* functionality here, but it's simply cleaner to not butcher the _readn
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* and _writen primitives just to handle automount timeouts. Soooo....
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automount_timeout.tv_sec = AUTOMOUNT_TIMEOUT;
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automount_timeout.tv_usec = 0;
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r = select(FD_SETSIZE, &set, NULL, NULL, &automount_timeout);
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error_die("handle_connection: select error\n");
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am_umount(mountpoint); /* this will return */
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continue; /* Back to the top of the for(;;) loop */
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nleft = BYTES_PER_XDR_UNIT;
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nread = read(sockfd, lineptr, nleft);
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error_die("handle_connection: readline error\n");
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return; /* EOF, connection closed */
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info("Packet length: %d\n", i);
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n = readn(sockfd, lineptr, (i - BYTES_PER_XDR_UNIT));
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return; /* connection closed */
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error_die("handle_connection: readline error\n");
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* OK We've got our command line, pass this off to ltspfs_dispatch
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info("Packet buffer: ");
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for (q = 0; q < i; q++)
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ltspfs_dispatch(sockfd, &in);
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* Well, we're back. Reset our position to the beginning.
added
removed
src/ltspfsd.c
