850 lines
18 KiB
C
850 lines
18 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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char copyright[] =
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"@(#) Copyright (c) 1982, 1986, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#if !defined(lint) && !defined(sgi) && !defined(__NetBSD__)
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static char sccsid[] = "@(#)query.c 8.1 (Berkeley) 6/5/93";
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#elif defined(__NetBSD__)
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static char rcsid[] = "$NetBSD$";
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#endif
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#include <sys/param.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#define RIPVERSION RIPv2
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#include <protocols/routed.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef sgi
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#include <strings.h>
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#include <bstring.h>
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#endif
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#ifndef sgi
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#define _HAVE_SIN_LEN
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#endif
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#include <md5.h>
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#define WTIME 15 /* Time to wait for all responses */
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#define STIME (250*1000) /* usec to wait for another response */
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int s;
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char *pgmname;
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union {
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struct rip rip;
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char packet[MAXPACKETSIZE+MAXPATHLEN];
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} omsg_buf;
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#define OMSG omsg_buf.rip
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int omsg_len = sizeof(struct rip);
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union {
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struct rip rip;
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char packet[MAXPACKETSIZE+1024];
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} imsg_buf;
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#define IMSG imsg_buf.rip
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int nflag; /* numbers, no names */
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int pflag; /* play the `gated` game */
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int ripv2 = 1; /* use RIP version 2 */
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int wtime = WTIME;
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int rflag; /* 1=ask about a particular route */
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int trace, not_trace; /* send trace command or not */
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int auth_type = RIP_AUTH_NONE;
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char passwd[RIP_AUTH_PW_LEN];
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u_long keyid;
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struct timeval sent; /* when query sent */
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static void rip_input(struct sockaddr_in*, int);
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static int out(char *);
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static void trace_loop(char *argv[]);
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static void query_loop(char *argv[], int);
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static int getnet(char *, struct netinfo *);
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static u_int std_mask(u_int);
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static int parse_quote(char **, char *, char *, char *, int);
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void
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main(int argc,
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char *argv[])
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{
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int ch, bsize;
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char *p, *options, *value, delim;
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OMSG.rip_nets[0].n_dst = RIP_DEFAULT;
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OMSG.rip_nets[0].n_family = RIP_AF_UNSPEC;
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OMSG.rip_nets[0].n_metric = htonl(HOPCNT_INFINITY);
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pgmname = argv[0];
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while ((ch = getopt(argc, argv, "np1w:r:t:a:")) != -1)
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switch (ch) {
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case 'n':
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not_trace = 1;
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nflag = 1;
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break;
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case 'p':
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not_trace = 1;
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pflag = 1;
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break;
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case '1':
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ripv2 = 0;
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break;
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case 'w':
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not_trace = 1;
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wtime = (int)strtoul(optarg, &p, 0);
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if (*p != '\0'
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|| wtime <= 0)
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goto usage;
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break;
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case 'r':
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not_trace = 1;
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if (rflag)
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goto usage;
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rflag = getnet(optarg, &OMSG.rip_nets[0]);
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if (!rflag) {
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struct hostent *hp = gethostbyname(optarg);
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if (hp == 0) {
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fprintf(stderr, "%s: %s:",
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pgmname, optarg);
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herror(0);
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exit(1);
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}
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bcopy(hp->h_addr, &OMSG.rip_nets[0].n_dst,
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sizeof(OMSG.rip_nets[0].n_dst));
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OMSG.rip_nets[0].n_family = RIP_AF_INET;
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OMSG.rip_nets[0].n_mask = -1;
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rflag = 1;
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}
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break;
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case 't':
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trace = 1;
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options = optarg;
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while (*options != '\0') {
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char *traceopts[] = {
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# define TRACE_ON 0
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"on",
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# define TRACE_MORE 1
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"more",
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# define TRACE_OFF 2
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"off",
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# define TRACE_DUMP 3
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"dump",
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0
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};
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switch (getsubopt(&options,traceopts,&value)) {
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case TRACE_ON:
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OMSG.rip_cmd = RIPCMD_TRACEON;
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if (!value
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|| strlen(value) > MAXPATHLEN)
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goto usage;
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break;
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case TRACE_MORE:
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if (value)
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goto usage;
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OMSG.rip_cmd = RIPCMD_TRACEON;
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value = "";
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break;
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case TRACE_OFF:
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if (value)
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goto usage;
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OMSG.rip_cmd = RIPCMD_TRACEOFF;
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value = "";
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break;
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case TRACE_DUMP:
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if (value)
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goto usage;
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OMSG.rip_cmd = RIPCMD_TRACEON;
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value = "dump/../table";
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break;
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default:
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goto usage;
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}
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strcpy((char*)OMSG.rip_tracefile, value);
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omsg_len += strlen(value) - sizeof(OMSG.ripun);
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}
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break;
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case 'a':
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not_trace = 1;
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p = strchr(optarg,'=');
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if (!p)
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goto usage;
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*p++ = '\0';
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if (!strcasecmp("passwd",optarg))
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auth_type = RIP_AUTH_PW;
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else if (!strcasecmp("md5_passwd",optarg))
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auth_type = RIP_AUTH_MD5;
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else
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goto usage;
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if (0 > parse_quote(&p,"|",&delim,
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passwd,sizeof(passwd)))
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goto usage;
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if (auth_type == RIP_AUTH_MD5
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&& delim == '|') {
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keyid = strtoul(p+1,&p,0);
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if (keyid > 255 || *p != '\0')
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goto usage;
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} else if (delim != '\0') {
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goto usage;
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}
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break;
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default:
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goto usage;
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}
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argv += optind;
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argc -= optind;
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if ((not_trace && trace) || argc == 0) {
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usage: fprintf(stderr, "%s: [-np1v] [-r tgt_rt] [-w wtime]"
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" [-a type=passwd] host1 [host2 ...]\n"
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"or\t-t {on=filename|more|off|dump}"
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" host1 [host2 ...]\n",
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pgmname);
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exit(1);
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}
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s = socket(AF_INET, SOCK_DGRAM, 0);
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if (s < 0) {
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perror("socket");
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exit(2);
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}
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/* be prepared to receive a lot of routes */
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for (bsize = 127*1024; ; bsize -= 1024) {
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if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
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&bsize, sizeof(bsize)) == 0)
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break;
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if (bsize <= 4*1024) {
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perror("setsockopt SO_RCVBUF");
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break;
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}
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}
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if (trace)
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trace_loop(argv);
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else
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query_loop(argv, argc);
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/* NOTREACHED */
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}
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/* tell the target hosts about tracing
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*/
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static void
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trace_loop(char *argv[])
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{
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struct sockaddr_in myaddr;
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int res;
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if (geteuid() != 0) {
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(void)fprintf(stderr, "-t requires UID 0\n");
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exit(1);
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}
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if (ripv2) {
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OMSG.rip_vers = RIPv2;
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} else {
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OMSG.rip_vers = RIPv1;
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}
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bzero(&myaddr, sizeof(myaddr));
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myaddr.sin_family = AF_INET;
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#ifdef _HAVE_SIN_LEN
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myaddr.sin_len = sizeof(myaddr);
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#endif
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myaddr.sin_port = htons(IPPORT_RESERVED-1);
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while (bind(s, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
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if (errno != EADDRINUSE
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|| myaddr.sin_port == 0) {
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perror("bind");
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exit(2);
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}
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myaddr.sin_port = htons(ntohs(myaddr.sin_port)-1);
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}
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res = 1;
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while (*argv != 0) {
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if (out(*argv++) <= 0)
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res = 0;
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}
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exit(res);
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}
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/* query all of the listed hosts
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*/
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static void
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query_loop(char *argv[], int argc)
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{
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# define NA0 (OMSG.rip_auths[0])
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# define NA2 (OMSG.rip_auths[2])
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struct seen {
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struct seen *next;
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struct in_addr addr;
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} *seen, *sp;
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int answered = 0;
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int cc;
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fd_set bits;
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struct timeval now, delay;
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struct sockaddr_in from;
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int fromlen;
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MD5_CTX md5_ctx;
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OMSG.rip_cmd = (pflag) ? RIPCMD_POLL : RIPCMD_REQUEST;
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if (ripv2) {
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OMSG.rip_vers = RIPv2;
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if (auth_type == RIP_AUTH_PW) {
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OMSG.rip_nets[1] = OMSG.rip_nets[0];
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NA0.a_family = RIP_AF_AUTH;
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NA0.a_type = RIP_AUTH_PW;
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bcopy(passwd, NA0.au.au_pw,
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RIP_AUTH_PW_LEN);
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omsg_len += sizeof(OMSG.rip_nets[0]);
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} else if (auth_type == RIP_AUTH_MD5) {
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OMSG.rip_nets[1] = OMSG.rip_nets[0];
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NA0.a_family = RIP_AF_AUTH;
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NA0.a_type = RIP_AUTH_MD5;
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NA0.au.a_md5.md5_keyid = (int8_t)keyid;
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NA0.au.a_md5.md5_auth_len = RIP_AUTH_PW_LEN;
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NA0.au.a_md5.md5_seqno = 0;
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NA0.au.a_md5.md5_pkt_len = sizeof(OMSG.rip_nets[1]);
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NA2.a_family = RIP_AF_AUTH;
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NA2.a_type = 1;
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bcopy(passwd, NA2.au.au_pw, sizeof(NA2.au.au_pw));
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MD5Init(&md5_ctx);
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MD5Update(&md5_ctx, (u_char *)&NA0,
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(char *)(&NA2+1) - (char *)&NA0);
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MD5Final(NA2.au.au_pw, &md5_ctx);
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omsg_len += 2*sizeof(OMSG.rip_nets[0]);
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}
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} else {
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OMSG.rip_vers = RIPv1;
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OMSG.rip_nets[0].n_mask = 0;
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}
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/* ask the first (valid) host */
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seen = 0;
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while (0 > out(*argv++)) {
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if (*argv == 0)
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exit(-1);
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answered++;
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}
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FD_ZERO(&bits);
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for (;;) {
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FD_SET(s, &bits);
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delay.tv_sec = 0;
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delay.tv_usec = STIME;
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cc = select(s+1, &bits, 0,0, &delay);
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if (cc > 0) {
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fromlen = sizeof(from);
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cc = recvfrom(s, imsg_buf.packet,
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sizeof(imsg_buf.packet), 0,
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(struct sockaddr *)&from, &fromlen);
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if (cc < 0) {
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perror("recvfrom");
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exit(1);
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}
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/* count the distinct responding hosts.
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* You cannot match responding hosts with
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* addresses to which queries were transmitted,
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* because a router might respond with a
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* different source address.
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*/
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for (sp = seen; sp != 0; sp = sp->next) {
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if (sp->addr.s_addr == from.sin_addr.s_addr)
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break;
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}
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if (sp == 0) {
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sp = malloc(sizeof(*sp));
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sp->addr = from.sin_addr;
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sp->next = seen;
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seen = sp;
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answered++;
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}
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rip_input(&from, cc);
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continue;
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}
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if (cc < 0) {
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if ( errno == EINTR)
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continue;
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perror("select");
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exit(1);
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}
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/* After a pause in responses, probe another host.
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* This reduces the intermingling of answers.
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*/
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while (*argv != 0 && 0 > out(*argv++))
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answered++;
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/* continue until no more packets arrive
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* or we have heard from all hosts
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*/
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if (answered >= argc)
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break;
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/* or until we have waited a long time
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*/
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if (gettimeofday(&now, 0) < 0) {
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perror("gettimeofday(now)");
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exit(1);
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}
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if (sent.tv_sec + wtime <= now.tv_sec)
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break;
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}
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/* fail if there was no answer */
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exit (answered >= argc ? 0 : 1);
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}
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/* send to one host
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*/
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static int
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out(char *host)
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{
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struct sockaddr_in router;
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struct hostent *hp;
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if (gettimeofday(&sent, 0) < 0) {
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perror("gettimeofday(sent)");
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return -1;
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}
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bzero(&router, sizeof(router));
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router.sin_family = AF_INET;
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#ifdef _HAVE_SIN_LEN
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router.sin_len = sizeof(router);
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#endif
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if (!inet_aton(host, &router.sin_addr)) {
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hp = gethostbyname(host);
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if (hp == 0) {
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herror(host);
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return -1;
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}
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bcopy(hp->h_addr, &router.sin_addr, sizeof(router.sin_addr));
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}
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router.sin_port = htons(RIP_PORT);
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if (sendto(s, &omsg_buf, omsg_len, 0,
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(struct sockaddr *)&router, sizeof(router)) < 0) {
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perror(host);
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return -1;
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}
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return 0;
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}
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/*
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* Convert string to printable characters
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*/
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static char *
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qstring(u_char *s, int len)
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{
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static char buf[8*20+1];
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char *p;
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u_char *s2, c;
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for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
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c = *s++;
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if (c == '\0') {
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for (s2 = s+1; s2 < &s[len]; s2++) {
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if (*s2 != '\0')
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break;
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}
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if (s2 >= &s[len])
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goto exit;
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}
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if (c >= ' ' && c < 0x7f && c != '\\') {
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*p++ = c;
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continue;
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}
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*p++ = '\\';
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switch (c) {
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case '\\':
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*p++ = '\\';
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break;
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case '\n':
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*p++= 'n';
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break;
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case '\r':
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*p++= 'r';
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break;
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case '\t':
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*p++ = 't';
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break;
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case '\b':
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*p++ = 'b';
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break;
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default:
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p += sprintf(p,"%o",c);
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break;
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}
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}
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exit:
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*p = '\0';
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return buf;
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}
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/*
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* Handle an incoming RIP packet.
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*/
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static void
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rip_input(struct sockaddr_in *from,
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int size)
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{
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|
struct netinfo *n, *lim;
|
|
struct in_addr in;
|
|
char *name;
|
|
char net_buf[80];
|
|
u_int mask, dmask;
|
|
char *sp;
|
|
int i;
|
|
struct hostent *hp;
|
|
struct netent *np;
|
|
struct netauth *na;
|
|
|
|
|
|
if (nflag) {
|
|
printf("%s:", inet_ntoa(from->sin_addr));
|
|
} else {
|
|
hp = gethostbyaddr((char*)&from->sin_addr,
|
|
sizeof(struct in_addr), AF_INET);
|
|
if (hp == 0) {
|
|
printf("%s:",
|
|
inet_ntoa(from->sin_addr));
|
|
} else {
|
|
printf("%s (%s):", hp->h_name,
|
|
inet_ntoa(from->sin_addr));
|
|
}
|
|
}
|
|
if (IMSG.rip_cmd != RIPCMD_RESPONSE) {
|
|
printf("\n unexpected response type %d\n", IMSG.rip_cmd);
|
|
return;
|
|
}
|
|
printf(" RIPv%d%s %d bytes\n", IMSG.rip_vers,
|
|
(IMSG.rip_vers != RIPv1 && IMSG.rip_vers != RIPv2) ? " ?" : "",
|
|
size);
|
|
if (size > MAXPACKETSIZE) {
|
|
if (size > sizeof(imsg_buf) - sizeof(*n)) {
|
|
printf(" at least %d bytes too long\n",
|
|
size-MAXPACKETSIZE);
|
|
size = sizeof(imsg_buf) - sizeof(*n);
|
|
} else {
|
|
printf(" %d bytes too long\n",
|
|
size-MAXPACKETSIZE);
|
|
}
|
|
} else if (size%sizeof(*n) != sizeof(struct rip)%sizeof(*n)) {
|
|
printf(" response of bad length=%d\n", size);
|
|
}
|
|
|
|
n = IMSG.rip_nets;
|
|
lim = (struct netinfo *)((char*)n + size) - 1;
|
|
for (; n <= lim; n++) {
|
|
name = "";
|
|
if (n->n_family == RIP_AF_INET) {
|
|
in.s_addr = n->n_dst;
|
|
(void)strcpy(net_buf, inet_ntoa(in));
|
|
|
|
mask = ntohl(n->n_mask);
|
|
dmask = mask & -mask;
|
|
if (mask != 0) {
|
|
sp = &net_buf[strlen(net_buf)];
|
|
if (IMSG.rip_vers == RIPv1) {
|
|
(void)sprintf(sp," mask=%#x ? ",mask);
|
|
mask = 0;
|
|
} else if (mask + dmask == 0) {
|
|
for (i = 0;
|
|
(i != 32
|
|
&& ((1<<i)&mask) == 0);
|
|
i++)
|
|
continue;
|
|
(void)sprintf(sp, "/%d",32-i);
|
|
} else {
|
|
(void)sprintf(sp," (mask %#x)", mask);
|
|
}
|
|
}
|
|
|
|
if (!nflag) {
|
|
if (mask == 0) {
|
|
mask = std_mask(in.s_addr);
|
|
if ((ntohl(in.s_addr) & ~mask) != 0)
|
|
mask = 0;
|
|
}
|
|
/* Without a netmask, do not worry about
|
|
* whether the destination is a host or a
|
|
* network. Try both and use the first name
|
|
* we get.
|
|
*
|
|
* If we have a netmask we can make a
|
|
* good guess.
|
|
*/
|
|
if ((in.s_addr & ~mask) == 0) {
|
|
np = getnetbyaddr((long)in.s_addr,
|
|
AF_INET);
|
|
if (np != 0)
|
|
name = np->n_name;
|
|
else if (in.s_addr == 0)
|
|
name = "default";
|
|
}
|
|
if (name[0] == '\0'
|
|
&& ((in.s_addr & ~mask) != 0
|
|
|| mask == 0xffffffff)) {
|
|
hp = gethostbyaddr((char*)&in,
|
|
sizeof(in),
|
|
AF_INET);
|
|
if (hp != 0)
|
|
name = hp->h_name;
|
|
}
|
|
}
|
|
|
|
} else if (n->n_family == RIP_AF_AUTH) {
|
|
na = (struct netauth*)n;
|
|
if (na->a_type == RIP_AUTH_PW
|
|
&& n == IMSG.rip_nets) {
|
|
(void)printf(" Password Authentication:"
|
|
" \"%s\"\n",
|
|
qstring(na->au.au_pw,
|
|
RIP_AUTH_PW_LEN));
|
|
continue;
|
|
}
|
|
|
|
if (na->a_type == RIP_AUTH_MD5
|
|
&& n == IMSG.rip_nets) {
|
|
(void)printf(" MD5 Authentication"
|
|
" len=%d KeyID=%d"
|
|
" seqno=%d"
|
|
" rsvd=%#x,%#x\n",
|
|
na->au.a_md5.md5_pkt_len,
|
|
na->au.a_md5.md5_keyid,
|
|
na->au.a_md5.md5_seqno,
|
|
na->au.a_md5.rsvd[0],
|
|
na->au.a_md5.rsvd[1]);
|
|
continue;
|
|
}
|
|
(void)printf(" Authentication type %d: ",
|
|
ntohs(na->a_type));
|
|
for (i = 0; i < sizeof(na->au.au_pw); i++)
|
|
(void)printf("%02x ", na->au.au_pw[i]);
|
|
putc('\n', stdout);
|
|
continue;
|
|
|
|
} else {
|
|
(void)sprintf(net_buf, "(af %#x) %d.%d.%d.%d",
|
|
ntohs(n->n_family),
|
|
(char)(n->n_dst >> 24),
|
|
(char)(n->n_dst >> 16),
|
|
(char)(n->n_dst >> 8),
|
|
(char)n->n_dst);
|
|
}
|
|
|
|
(void)printf(" %-18s metric %2d %-10s",
|
|
net_buf, ntohl(n->n_metric), name);
|
|
|
|
if (n->n_nhop != 0) {
|
|
in.s_addr = n->n_nhop;
|
|
if (nflag)
|
|
hp = 0;
|
|
else
|
|
hp = gethostbyaddr((char*)&in, sizeof(in),
|
|
AF_INET);
|
|
(void)printf(" nhop=%-15s%s",
|
|
(hp != 0) ? hp->h_name : inet_ntoa(in),
|
|
(IMSG.rip_vers == RIPv1) ? " ?" : "");
|
|
}
|
|
if (n->n_tag != 0)
|
|
(void)printf(" tag=%#x%s", n->n_tag,
|
|
(IMSG.rip_vers == RIPv1) ? " ?" : "");
|
|
putc('\n', stdout);
|
|
}
|
|
}
|
|
|
|
|
|
/* Return the classical netmask for an IP address.
|
|
*/
|
|
static u_int
|
|
std_mask(u_int addr) /* in network order */
|
|
{
|
|
NTOHL(addr); /* was a host, not a network */
|
|
|
|
if (addr == 0) /* default route has mask 0 */
|
|
return 0;
|
|
if (IN_CLASSA(addr))
|
|
return IN_CLASSA_NET;
|
|
if (IN_CLASSB(addr))
|
|
return IN_CLASSB_NET;
|
|
return IN_CLASSC_NET;
|
|
}
|
|
|
|
|
|
/* get a network number as a name or a number, with an optional "/xx"
|
|
* netmask.
|
|
*/
|
|
static int /* 0=bad */
|
|
getnet(char *name,
|
|
struct netinfo *rt)
|
|
{
|
|
int i;
|
|
struct netent *nentp;
|
|
u_int mask;
|
|
struct in_addr in;
|
|
char hname[MAXHOSTNAMELEN+1];
|
|
char *mname, *p;
|
|
|
|
|
|
/* Detect and separate "1.2.3.4/24"
|
|
*/
|
|
if (0 != (mname = rindex(name,'/'))) {
|
|
i = (int)(mname - name);
|
|
if (i > sizeof(hname)-1) /* name too long */
|
|
return 0;
|
|
bcopy(name, hname, i);
|
|
hname[i] = '\0';
|
|
mname++;
|
|
name = hname;
|
|
}
|
|
|
|
nentp = getnetbyname(name);
|
|
if (nentp != 0) {
|
|
in.s_addr = nentp->n_net;
|
|
} else if (inet_aton(name, &in) == 1) {
|
|
NTOHL(in.s_addr);
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
if (mname == 0) {
|
|
mask = std_mask(in.s_addr);
|
|
if ((~mask & in.s_addr) != 0)
|
|
mask = 0xffffffff;
|
|
} else {
|
|
mask = (u_int)strtoul(mname, &p, 0);
|
|
if (*p != '\0' || mask > 32)
|
|
return 0;
|
|
mask = 0xffffffff << (32-mask);
|
|
}
|
|
|
|
rt->n_dst = htonl(in.s_addr);
|
|
rt->n_family = RIP_AF_INET;
|
|
rt->n_mask = htonl(mask);
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* strtok(), but honoring backslash
|
|
*/
|
|
static int /* -1=bad */
|
|
parse_quote(char **linep,
|
|
char *delims,
|
|
char *delimp,
|
|
char *buf,
|
|
int lim)
|
|
{
|
|
char c, *pc, *p;
|
|
|
|
|
|
pc = *linep;
|
|
if (*pc == '\0')
|
|
return -1;
|
|
|
|
for (;;) {
|
|
if (lim == 0)
|
|
return -1;
|
|
c = *pc++;
|
|
if (c == '\0')
|
|
break;
|
|
|
|
if (c == '\\' && pc != '\0') {
|
|
if ((c = *pc++) == 'n') {
|
|
c = '\n';
|
|
} else if (c == 'r') {
|
|
c = '\r';
|
|
} else if (c == 't') {
|
|
c = '\t';
|
|
} else if (c == 'b') {
|
|
c = '\b';
|
|
} else if (c >= '0' && c <= '7') {
|
|
c -= '0';
|
|
if (*pc >= '0' && *pc <= '7') {
|
|
c = (c<<3)+(*pc++ - '0');
|
|
if (*pc >= '0' && *pc <= '7')
|
|
c = (c<<3)+(*pc++ - '0');
|
|
}
|
|
}
|
|
|
|
} else {
|
|
for (p = delims; *p != '\0'; ++p) {
|
|
if (*p == c)
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
*buf++ = c;
|
|
--lim;
|
|
}
|
|
exit:
|
|
if (delimp != 0)
|
|
*delimp = c;
|
|
*linep = pc-1;
|
|
if (lim != 0)
|
|
*buf = '\0';
|
|
return 0;
|
|
}
|