--- /dev/null
+/* -*-C-*-
+ Server code for handling requests from clients and forwarding them
+ on to the GNU Emacs process.
+
+ This file is part of GNU Emacs.
+
+ Copying is permitted under those conditions described by the GNU
+ General Public License.
+
+ Copyright (C) 1989 Free Software Foundation, Inc.
+
+ Author: Andy Norman (ange@hplb.hpl.hp.com), based on 'etc/server.c'
+ from the 18.52 GNU Emacs distribution.
+
+ Please mail bugs and suggestions to the author at the above address.
+*/
+
+/* HISTORY
+ * 11-Nov-1990 bristor@simba
+ * Added EOT stuff.
+ */
+
+/*
+ * This file incorporates new features added by Bob Weiner <weiner@mot.com>,
+ * Darrell Kindred <dkindred@cmu.edu> and Arup Mukherjee <arup@cmu.edu>.
+ * Please see the note at the end of the README file for details.
+ *
+ * (If gnuserv came bundled with your emacs, the README file is probably
+ * ../etc/gnuserv.README relative to the directory containing this file)
+ */
+
+#include "gnuserv.h"
+
+char gnuserv_version[] = "gnuserv version" GNUSERV_VERSION;
+
+
+#ifdef USE_LITOUT
+#ifdef linux
+#include <bsd/sgtty.h>
+#else
+#include <sgtty.h>
+#endif
+#endif
+
+#ifdef AIX
+#include <sys/select.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif /* HAVE_STRING_H */
+
+#if !defined(SYSV_IPC) && !defined(UNIX_DOMAIN_SOCKETS) && \
+ !defined(INTERNET_DOMAIN_SOCKETS)
+main ()
+{
+ fprintf (stderr,"Sorry, the Emacs server is only supported on systems that have\n");
+ fprintf (stderr,"Unix Domain sockets, Internet Domain sockets or System V IPC\n");
+ exit (1);
+} /* main */
+#else /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
+
+#ifdef SYSV_IPC
+
+int ipc_qid = 0; /* ipc message queue id */
+pid_t ipc_wpid = 0; /* watchdog task pid */
+
+
+/*
+ ipc_exit -- clean up the queue id and queue, then kill the watchdog task
+ if it exists. exit with the given status.
+*/
+void
+ipc_exit (int stat)
+{
+ msgctl (ipc_qid,IPC_RMID,0);
+
+ if (ipc_wpid != 0)
+ kill (ipc_wpid, SIGKILL);
+
+ exit (stat);
+} /* ipc_exit */
+
+
+/*
+ ipc_handle_signal -- catch the signal given and clean up.
+*/
+void
+ipc_handle_signal(int sig)
+{
+ ipc_exit (0);
+} /* ipc_handle_signal */
+
+
+/*
+ ipc_spawn_watchdog -- spawn a watchdog task to clean up the message queue should the
+ server process die.
+*/
+void
+ipc_spawn_watchdog (void)
+{
+ if ((ipc_wpid = fork ()) == 0)
+ { /* child process */
+ pid_t ppid = getppid (); /* parent's process id */
+
+ setpgrp(); /* gnu kills process group on exit */
+
+ while (1)
+ {
+ if (kill (ppid, 0) < 0) /* ppid is no longer valid, parent
+ may have died */
+ {
+ ipc_exit (0);
+ } /* if */
+
+ sleep(10); /* have another go later */
+ } /* while */
+ } /* if */
+
+} /* ipc_spawn_watchdog */
+
+
+/*
+ ipc_init -- initialize server, setting the global msqid that can be listened on.
+*/
+void
+ipc_init (struct msgbuf **msgpp)
+{
+ key_t key; /* messge key */
+ char buf[GSERV_BUFSZ]; /* pathname for key */
+
+ sprintf (buf,"%s/gsrv%d",tmpdir,(int)geteuid ());
+ creat (buf,0600);
+ key = ftok (buf,1);
+
+ if ((ipc_qid = msgget (key,0600|IPC_CREAT)) == -1)
+ {
+ perror (progname);
+ fprintf (stderr, "%s: unable to create msg queue\n", progname);
+ ipc_exit (1);
+ } /* if */
+
+ ipc_spawn_watchdog ();
+
+ signal (SIGTERM,ipc_handle_signal);
+ signal (SIGINT,ipc_handle_signal);
+
+ if ((*msgpp = (struct msgbuf *)
+ malloc (sizeof **msgpp + GSERV_BUFSZ)) == NULL)
+ {
+ fprintf (stderr,
+ "%s: unable to allocate space for message buffer\n", progname);
+ ipc_exit(1);
+ } /* if */
+} /* ipc_init */
+
+
+/*
+ handle_ipc_request -- accept a request from a client, pass the request on
+ to the GNU Emacs process, then wait for its reply and
+ pass that on to the client.
+*/
+void
+handle_ipc_request (struct msgbuf *msgp)
+{
+ struct msqid_ds msg_st; /* message status */
+ char buf[GSERV_BUFSZ];
+ int len; /* length of message / read */
+ int s, result_len; /* tag fields on the response from emacs */
+ int offset = 0;
+ int total = 1; /* # bytes that will actually be sent off */
+
+ if ((len = msgrcv (ipc_qid, msgp, GSERV_BUFSZ - 1, 1, 0)) < 0)
+ {
+ perror (progname);
+ fprintf (stderr, "%s: unable to receive\n", progname);
+ ipc_exit (1);
+ } /* if */
+
+ msgctl (ipc_qid, IPC_STAT, &msg_st);
+ strncpy (buf, msgp->mtext, len);
+ buf[len] = '\0'; /* terminate */
+
+ printf ("%d %s", ipc_qid, buf);
+ fflush (stdout);
+
+ /* now for the response from gnu */
+ msgp->mtext[0] = '\0';
+
+#if 0
+ if ((len = read(0,buf,GSERV_BUFSZ-1)) < 0)
+ {
+ perror (progname);
+ fprintf (stderr, "%s: unable to read\n", progname);
+ ipc_exit (1);
+ } /* if */
+
+ sscanf (buf, "%d:%[^\n]\n", &junk, msgp->mtext);
+#else
+
+ /* read in "n/m:" (n=client fd, m=message length) */
+
+ while (offset < (GSERV_BUFSZ-1) &&
+ ((len = read (0, buf + offset, 1)) > 0) &&
+ buf[offset] != ':')
+ {
+ offset += len;
+ }
+
+ if (len < 0)
+ {
+ perror (progname);
+ fprintf (stderr, "%s: unable to read\n", progname);
+ exit(1);
+ }
+
+ /* parse the response from emacs, getting client fd & result length */
+ buf[offset] = '\0';
+ sscanf (buf, "%d/%d", &s, &result_len);
+
+ while (result_len > 0)
+ {
+ if ((len = read(0, buf, min2 (result_len, GSERV_BUFSZ - 1))) < 0)
+ {
+ perror (progname);
+ fprintf (stderr, "%s: unable to read\n", progname);
+ exit (1);
+ }
+
+ /* Send this string off, but only if we have enough space */
+
+ if (GSERV_BUFSZ > total)
+ {
+ if (total + len <= GSERV_BUFSZ)
+ buf[len] = 0;
+ else
+ buf[GSERV_BUFSZ - total] = 0;
+
+ send_string(s,buf);
+ total += strlen(buf);
+ }
+
+ result_len -= len;
+ }
+
+ /* eat the newline */
+ while ((len = read (0,buf,1)) == 0)
+ ;
+ if (len < 0)
+ {
+ perror(progname);
+ fprintf (stderr,"%s: unable to read\n", progname);
+ exit (1);
+ }
+ if (buf[0] != '\n')
+ {
+ fprintf (stderr,"%s: garbage after result [%c]\n", progname, buf[0]);
+ exit (1);
+ }
+#endif
+
+ /* Send a response back to the client. */
+
+ msgp->mtype = msg_st.msg_lspid;
+ if (msgsnd (ipc_qid,msgp,strlen(msgp->mtext)+1,0) < 0)
+ perror ("msgsend(gnuserv)");
+
+} /* handle_ipc_request */
+#endif /* SYSV_IPC */
+
+
+#if defined(INTERNET_DOMAIN_SOCKETS) || defined(UNIX_DOMAIN_SOCKETS)
+/*
+ echo_request -- read request from a given socket descriptor, and send the information
+ to stdout (the gnu process).
+*/
+static void
+echo_request (int s)
+{
+ char buf[GSERV_BUFSZ];
+ int len;
+
+ printf("%d ",s);
+
+ /* read until we get a newline or no characters */
+ while ((len = recv(s,buf,GSERV_BUFSZ-1,0)) > 0) {
+ buf[len] = '\0';
+ printf("%s",buf);
+
+ if (buf[len-1] == EOT_CHR) {
+ fflush(stdout);
+ break; /* end of message */
+ }
+
+ } /* while */
+
+ if (len < 0) {
+ perror(progname);
+ fprintf(stderr,"%s: unable to recv\n",progname);
+ exit(1);
+ } /* if */
+
+} /* echo_request */
+
+
+/*
+ handle_response -- accept a response from stdin (the gnu process) and pass the
+ information on to the relevant client.
+*/
+static void
+handle_response (void)
+{
+ char buf[GSERV_BUFSZ+1];
+ int offset=0;
+ int s;
+ int len = 0;
+ int result_len;
+
+ /* read in "n/m:" (n=client fd, m=message length) */
+ while (offset < GSERV_BUFSZ &&
+ ((len = read(0,buf+offset,1)) > 0) &&
+ buf[offset] != ':') {
+ offset += len;
+ }
+
+ if (len < 0) {
+ perror(progname);
+ fprintf(stderr,"%s: unable to read\n",progname);
+ exit(1);
+ }
+
+ /* parse the response from emacs, getting client fd & result length */
+ buf[offset] = '\0';
+ sscanf(buf,"%d/%d", &s, &result_len);
+
+ while (result_len > 0) {
+ if ((len = read(0,buf,min2(result_len,GSERV_BUFSZ))) < 0) {
+ perror(progname);
+ fprintf(stderr,"%s: unable to read\n",progname);
+ exit(1);
+ }
+ buf[len] = '\0';
+ send_string(s,buf);
+ result_len -= len;
+ }
+
+ /* eat the newline */
+ while ((len = read(0,buf,1)) == 0)
+ ;
+ if (len < 0)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to read\n",progname);
+ exit(1);
+ }
+ if (buf[0] != '\n')
+ {
+ fprintf(stderr,"%s: garbage after result\n",progname);
+ exit(1);
+ }
+ /* send the newline */
+ buf[1] = '\0';
+ send_string(s,buf);
+ close(s);
+
+} /* handle_response */
+#endif /* INTERNET_DOMAIN_SOCKETS || UNIX_DOMAIN_SOCKETS */
+
+
+#ifdef INTERNET_DOMAIN_SOCKETS
+struct entry {
+ unsigned long host_addr;
+ struct entry *next;
+};
+
+struct entry *permitted_hosts[TABLE_SIZE];
+
+#ifdef AUTH_MAGIC_COOKIE
+# include <X11/X.h>
+# include <X11/Xauth.h>
+
+static Xauth *server_xauth = NULL;
+#endif
+
+static int
+timed_read (int fd, char *buf, int max, int timeout, int one_line)
+{
+ fd_set rmask;
+ struct timeval tv; /* = {timeout, 0}; */
+ char c = 0;
+ int nbytes = 0;
+ int r;
+
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+
+ FD_ZERO(&rmask);
+ FD_SET(fd, &rmask);
+
+ do
+ {
+ r = select(fd + 1, &rmask, NULL, NULL, &tv);
+
+ if (r > 0)
+ {
+ if (read (fd, &c, 1) == 1 )
+ {
+ *buf++ = c;
+ ++nbytes;
+ }
+ else
+ {
+ printf ("read error on socket\004\n");
+ return -1;
+ }
+ }
+ else if (r == 0)
+ {
+ printf ("read timed out\004\n");
+ return -1;
+ }
+ else
+ {
+ printf ("error in select\004\n");
+ return -1;
+ }
+ } while ((nbytes < max) && !(one_line && (c == '\n')));
+
+ --buf;
+ if (one_line && *buf == '\n')
+ {
+ *buf = 0;
+ }
+
+ return nbytes;
+}
+
+
+
+/*
+ permitted -- return whether a given host is allowed to connect to the server.
+*/
+static int
+permitted (unsigned long host_addr, int fd)
+{
+ int key;
+ struct entry *entry;
+
+ char auth_protocol[128];
+ char buf[1024];
+ int auth_data_len;
+
+ if (fd > 0)
+ {
+ /* we are checking permission on a real connection */
+
+ /* Read auth protocol name */
+
+ if (timed_read(fd, auth_protocol, AUTH_NAMESZ, AUTH_TIMEOUT, 1) <= 0)
+ return FALSE;
+
+ if (strcmp (auth_protocol, DEFAUTH_NAME) &&
+ strcmp (auth_protocol, MCOOKIE_NAME))
+ {
+ printf ("authentication protocol (%s) from client is invalid...\n",
+ auth_protocol);
+ printf ("... Was the client an old version of gnuclient/gnudoit?\004\n");
+
+ return FALSE;
+ }
+
+ if (!strcmp(auth_protocol, MCOOKIE_NAME))
+ {
+
+ /*
+ * doing magic cookie auth
+ */
+
+ if (timed_read(fd, buf, 10, AUTH_TIMEOUT, 1) <= 0)
+ return FALSE;
+
+ auth_data_len = atoi(buf);
+
+ if (auth_data_len <= 0 || auth_data_len > (int) sizeof(buf))
+ {
+ return FALSE;
+ }
+
+ if (timed_read(fd, buf, auth_data_len, AUTH_TIMEOUT, 0) != auth_data_len)
+ return FALSE;
+
+#ifdef AUTH_MAGIC_COOKIE
+ if (server_xauth && server_xauth->data)
+ {
+ /* Do a compare without comprising info about
+ the size of the cookie */
+ int auth_data_pos;
+ int auth_mismatches =
+ ( auth_data_len ^
+ server_xauth->data_length );
+
+ for(auth_data_pos=0; auth_data_pos < auth_data_len; ++auth_data_pos)
+ auth_mismatches |=
+ ( buf[auth_data_pos] ^
+ server_xauth->data[auth_data_pos % server_xauth->data_length]);
+
+ if (auth_mismatches == 0)
+ return TRUE;
+
+ for(;rand() % 1000;);
+ }
+
+#else
+ printf ("client tried Xauth, but server is not compiled with Xauth\n");
+#endif
+
+ /*
+ * auth failed, but allow this to fall through to the GNU_SECURE
+ * protocol....
+ */
+
+ printf ("Xauth authentication failed, trying GNU_SECURE auth...\004\n");
+
+ }
+
+ /* Other auth protocols go here, and should execute only if the
+ * auth_protocol name matches.
+ */
+
+ }
+
+
+ /* Now, try the old GNU_SECURE stuff... */
+
+ /* First find the hash key */
+ key = HASH(host_addr) % TABLE_SIZE;
+
+ /* Now check the chain for that hash key */
+ for(entry=permitted_hosts[key]; entry != NULL; entry=entry->next)
+ if (host_addr == entry->host_addr)
+ return(TRUE);
+
+ return(FALSE);
+
+} /* permitted */
+
+
+/*
+ add_host -- add the given host to the list of permitted hosts, provided it isn't
+ already there.
+*/
+static void
+add_host (unsigned long host_addr)
+{
+ int key;
+ struct entry *new_entry;
+
+ if (!permitted(host_addr, -1))
+ {
+ if ((new_entry = (struct entry *) malloc(sizeof(struct entry))) == NULL) {
+ fprintf(stderr,"%s: unable to malloc space for permitted host entry\n",
+ progname);
+ exit(1);
+ } /* if */
+
+ new_entry->host_addr = host_addr;
+ key = HASH(host_addr) % TABLE_SIZE;
+ new_entry->next = permitted_hosts[key];
+ permitted_hosts[key] = new_entry;
+ } /* if */
+
+} /* add_host */
+
+
+/*
+ setup_table -- initialize the table of hosts allowed to contact the server,
+ by reading from the file specified by the GNU_SECURE
+ environment variable
+ Put in the local machine, and, if a security file is specifed,
+ add each host that is named in the file.
+ Return the number of hosts added.
+*/
+static int
+setup_table (void)
+{
+ FILE *host_file;
+ char *file_name;
+ char hostname[HOSTNAMSZ];
+ unsigned int host_addr;
+ int i, hosts=0;
+ int t;
+
+ /* Make sure every entry is null */
+ for (i=0; i<TABLE_SIZE; i++)
+ permitted_hosts[i] = NULL;
+
+ gethostname(hostname,HOSTNAMSZ);
+
+ if ((t = internet_addr(hostname)) == -1) {
+ fprintf(stderr,"%s: unable to find %s in /etc/hosts or from YP",
+ progname,hostname);
+ exit(1);
+ } else {
+ host_addr = t;
+ } /* if */
+
+#ifdef AUTH_MAGIC_COOKIE
+
+ server_xauth = XauGetAuthByAddr (FamilyInternet,
+ sizeof(host_addr), (char *)&host_addr,
+ strlen(MCOOKIE_SCREEN), MCOOKIE_SCREEN,
+ strlen(MCOOKIE_X_NAME), MCOOKIE_X_NAME);
+ hosts++;
+
+#endif /* AUTH_MAGIC_COOKIE */
+
+
+#if 0 /* Don't even want to allow access from the local host by default */
+ add_host(host_addr); /* add local host */
+#endif
+
+ if (((file_name = getenv("GNU_SECURE")) != NULL && /* security file */
+ (host_file = fopen(file_name,"r")) != NULL)) /* opened ok */
+ {
+ while ((fscanf(host_file,"%s",hostname) != EOF)) { /* find a host */
+ t = internet_addr(hostname);
+ if (t != -1)/* get its addr */
+ {
+ host_addr = t;
+ add_host(host_addr); /* add the addr */
+ hosts++;
+ }
+ }
+ fclose(host_file);
+ } /* if */
+
+ return hosts;
+} /* setup_table */
+
+
+/*
+ internet_init -- initialize server, returning an internet socket that can
+ be listened on.
+*/
+static int
+internet_init (void)
+{
+ int ls; /* socket descriptor */
+ struct servent *sp; /* pointer to service information */
+ struct sockaddr_in server; /* for local socket address */
+ char *ptr; /* ptr to return from getenv */
+
+ if (setup_table() == 0)
+ return -1;
+
+ /* clear out address structure */
+ memset (&server, '\0', sizeof (server));
+
+ /* Set up address structure for the listen socket. */
+ server.sin_family = AF_INET;
+ server.sin_addr.s_addr = INADDR_ANY;
+
+ /* Find the information for the gnu server
+ * in order to get the needed port number.
+ */
+ if ((ptr=getenv("GNU_PORT")) != NULL)
+ server.sin_port = htons(atoi(ptr));
+ else if ((sp = getservbyname ("gnuserv", "tcp")) == NULL)
+ server.sin_port = htons(DEFAULT_PORT+getuid());
+ else
+ server.sin_port = sp->s_port;
+
+ /* Create the listen socket. */
+ if ((ls = socket (AF_INET,SOCK_STREAM, 0)) == -1)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to create socket\n",progname);
+ exit(1);
+ } /* if */
+
+ /* Bind the listen address to the socket. */
+ if (bind(ls,(struct sockaddr *) &server,sizeof(struct sockaddr_in)) == -1)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to bind socket\n",progname);
+ exit(1);
+ } /* if */
+
+ /* Initiate the listen on the socket so remote users
+ * can connect.
+ */
+ if (listen(ls,20) == -1)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to listen\n",progname);
+ exit(1);
+ } /* if */
+
+ return(ls);
+
+} /* internet_init */
+
+
+/*
+ handle_internet_request -- accept a request from a client and send the information
+ to stdout (the gnu process).
+*/
+static void
+handle_internet_request (int ls)
+{
+ int s;
+ socklen_t addrlen = sizeof (struct sockaddr_in);
+ struct sockaddr_in peer; /* for peer socket address */
+
+ memset (&peer, '\0', sizeof (peer));
+
+ if ((s = accept(ls,(struct sockaddr *)&peer, &addrlen)) == -1)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to accept\n",progname);
+ exit(1);
+ } /* if */
+
+ /* Check that access is allowed - if not return crud to the client */
+ if (!permitted(peer.sin_addr.s_addr, s))
+ {
+ send_string(s,"gnudoit: Connection refused\ngnudoit: unable to connect to remote");
+ close(s);
+
+ printf("Refused connection from %s\004\n", inet_ntoa(peer.sin_addr));
+ return;
+ } /* if */
+
+ echo_request(s);
+
+} /* handle_internet_request */
+#endif /* INTERNET_DOMAIN_SOCKETS */
+
+
+#ifdef UNIX_DOMAIN_SOCKETS
+/*
+ unix_init -- initialize server, returning an unix-domain socket that can
+ be listened on.
+*/
+static int
+unix_init (void)
+{
+ int ls; /* socket descriptor */
+ struct sockaddr_un server; /* unix socket address */
+ socklen_t bindlen;
+
+ if ((ls = socket(AF_UNIX,SOCK_STREAM, 0)) < 0)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to create socket\n",progname);
+ exit(1);
+ } /* if */
+
+ /* Set up address structure for the listen socket. */
+#ifdef HIDE_UNIX_SOCKET
+ sprintf(server.sun_path,"%s/gsrvdir%d",tmpdir,(int)geteuid());
+ if (mkdir(server.sun_path, 0700) < 0)
+ {
+ /* assume it already exists, and try to set perms */
+ if (chmod(server.sun_path, 0700) < 0)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: can't set permissions on %s\n",
+ progname, server.sun_path);
+ exit(1);
+ }
+ }
+ strcat(server.sun_path,"/gsrv");
+ unlink(server.sun_path); /* remove old file if it exists */
+#else /* HIDE_UNIX_SOCKET */
+ sprintf(server.sun_path,"%s/gsrv%d",tmpdir,(int)geteuid());
+ unlink(server.sun_path); /* remove old file if it exists */
+#endif /* HIDE_UNIX_SOCKET */
+
+ server.sun_family = AF_UNIX;
+#ifdef HAVE_SOCKADDR_SUN_LEN
+ /* See W. R. Stevens "Advanced Programming in the Unix Environment"
+ p. 502 */
+ bindlen = (sizeof (server.sun_len) + sizeof (server.sun_family)
+ + strlen (server.sun_path) + 1);
+ server.sun_len = bindlen;
+#else
+ bindlen = strlen (server.sun_path) + sizeof (server.sun_family);
+#endif
+
+ if (bind(ls,(struct sockaddr *)&server,bindlen) < 0)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to bind socket\n",progname);
+ exit(1);
+ } /* if */
+
+ chmod(server.sun_path,0700); /* only this user can send commands */
+
+ if (listen(ls,20) < 0) {
+ perror(progname);
+ fprintf(stderr,"%s: unable to listen\n",progname);
+ exit(1);
+ } /* if */
+
+ /* #### there are also better ways of dealing with this when
+ sigvec() is present. */
+#if defined (HAVE_SIGPROCMASK)
+ {
+ sigset_t _mask;
+ sigemptyset (&_mask);
+ sigaddset (&_mask, SIGPIPE);
+ sigprocmask (SIG_BLOCK, &_mask, NULL);
+ }
+#else
+ signal(SIGPIPE,SIG_IGN); /* in case user kills client */
+#endif
+
+ return(ls);
+
+} /* unix_init */
+
+
+/*
+ handle_unix_request -- accept a request from a client and send the information
+ to stdout (the gnu process).
+*/
+static void
+handle_unix_request (int ls)
+{
+ int s;
+ socklen_t len = sizeof (struct sockaddr_un);
+ struct sockaddr_un server; /* for unix socket address */
+
+ server.sun_family = AF_UNIX;
+
+ if ((s = accept(ls,(struct sockaddr *)&server, &len)) < 0)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to accept\n",progname);
+ } /* if */
+
+ echo_request(s);
+
+} /* handle_unix_request */
+#endif /* UNIX_DOMAIN_SOCKETS */
+
+
+int
+main (int argc, char *argv[])
+{
+ int chan; /* temporary channel number */
+#ifdef SYSV_IPC
+ struct msgbuf *msgp; /* message buffer */
+#else
+ int ils = -1; /* internet domain listen socket */
+ int uls = -1; /* unix domain listen socket */
+#endif /* SYSV_IPC */
+
+ progname = argv[0];
+
+ for(chan=3; chan < _NFILE; close(chan++)) /* close unwanted channels */
+ ;
+
+#ifdef USE_TMPDIR
+ tmpdir = getenv("TMPDIR");
+#endif
+ if (!tmpdir)
+ tmpdir = "/tmp";
+#ifdef USE_LITOUT
+ {
+ /* this is to allow ^D to pass to emacs */
+ int d = LLITOUT;
+ (void) ioctl(fileno(stdout), TIOCLBIS, &d);
+ }
+#endif
+
+#ifdef SYSV_IPC
+ ipc_init(&msgp); /* get a msqid to listen on, and a message buffer */
+#endif /* SYSV_IPC */
+
+#ifdef INTERNET_DOMAIN_SOCKETS
+ ils = internet_init(); /* get an internet domain socket to listen on */
+#endif /* INTERNET_DOMAIN_SOCKETS */
+
+#ifdef UNIX_DOMAIN_SOCKETS
+ uls = unix_init(); /* get a unix domain socket to listen on */
+#endif /* UNIX_DOMAIN_SOCKETS */
+
+ while (1) {
+#ifdef SYSV_IPC
+ handle_ipc_request(msgp);
+#else /* NOT SYSV_IPC */
+ fd_set rmask;
+ FD_ZERO(&rmask);
+ FD_SET(fileno(stdin), &rmask);
+ if (uls >= 0)
+ FD_SET(uls, &rmask);
+ if (ils >= 0)
+ FD_SET(ils, &rmask);
+
+ if (select(max2(fileno(stdin),max2(uls,ils)) + 1, &rmask,
+ (fd_set *)NULL, (fd_set *)NULL, (struct timeval *)NULL) < 0)
+ {
+ perror(progname);
+ fprintf(stderr,"%s: unable to select\n",progname);
+ return 1;
+ } /* if */
+
+#ifdef UNIX_DOMAIN_SOCKETS
+ if (uls > 0 && FD_ISSET(uls, &rmask))
+ handle_unix_request(uls);
+#endif
+
+#ifdef INTERNET_DOMAIN_SOCKETS
+ if (ils > 0 && FD_ISSET(ils, &rmask))
+ handle_internet_request(ils);
+#endif /* INTERNET_DOMAIN_SOCKETS */
+
+ if (FD_ISSET(fileno(stdin), &rmask)) /* from stdin (gnu process) */
+ handle_response();
+#endif /* NOT SYSV_IPC */
+ } /* while (1) */
+} /* main */
+
+#endif /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
projects / chise / xemacs-chise.git / blobdiff