diff options
author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
---|---|---|
committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
commit | f9ab90d9d6d02989a075d0f0074496d5b1045e4b (patch) | |
tree | add7e996bac5289cdc55e6935750c352505560a9 /usr.bin/finger/net.c | |
parent | be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da (diff) | |
download | FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.zip FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.tar.gz |
BSD 4.4 Lite Usr.bin Sources
Diffstat (limited to 'usr.bin/finger/net.c')
-rw-r--r-- | usr.bin/finger/net.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/usr.bin/finger/net.c b/usr.bin/finger/net.c new file mode 100644 index 0000000..51f1b43 --- /dev/null +++ b/usr.bin/finger/net.c @@ -0,0 +1,148 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Tony Nardo of the Johns Hopkins University/Applied Physics Lab. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)net.c 8.3 (Berkeley) 1/2/94"; +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#include <db.h> +#include <unistd.h> +#include <pwd.h> +#include <utmp.h> +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include "finger.h" + +void +netfinger(name) + char *name; +{ + extern int lflag; + register FILE *fp; + register int c, lastc; + struct in_addr defaddr; + struct hostent *hp, def; + struct servent *sp; + struct sockaddr_in sin; + int s; + char *alist[1], *host; + + if (!(host = rindex(name, '@'))) + return; + *host++ = NULL; + if (isdigit(*host) && (defaddr.s_addr = inet_addr(host)) != -1) { + def.h_name = host; + def.h_addr_list = alist; + def.h_addr = (char *)&defaddr; + def.h_length = sizeof(struct in_addr); + def.h_addrtype = AF_INET; + def.h_aliases = 0; + hp = &def; + } else if (!(hp = gethostbyname(host))) { + (void)fprintf(stderr, + "finger: unknown host: %s\n", host); + return; + } + if (!(sp = getservbyname("finger", "tcp"))) { + (void)fprintf(stderr, "finger: tcp/finger: unknown service\n"); + return; + } + sin.sin_family = hp->h_addrtype; + bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length); + sin.sin_port = sp->s_port; + if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) { + perror("finger: socket"); + return; + } + + /* have network connection; identify the host connected with */ + (void)printf("[%s]\n", hp->h_name); + if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { + perror("finger: connect"); + (void)close(s); + return; + } + + /* -l flag for remote fingerd */ + if (lflag) + write(s, "/W ", 3); + /* send the name followed by <CR><LF> */ + (void)write(s, name, strlen(name)); + (void)write(s, "\r\n", 2); + + /* + * Read from the remote system; once we're connected, we assume some + * data. If none arrives, we hang until the user interrupts. + * + * If we see a <CR> or a <CR> with the high bit set, treat it as + * a newline; if followed by a newline character, only output one + * newline. + * + * Otherwise, all high bits are stripped; if it isn't printable and + * it isn't a space, we can simply set the 7th bit. Every ASCII + * character with bit 7 set is printable. + */ + if (fp = fdopen(s, "r")) + while ((c = getc(fp)) != EOF) { + c &= 0x7f; + if (c == 0x0d) { + if (lastc == '\r') /* ^M^M - skip dupes */ + continue; + c = '\n'; + lastc = '\r'; + } else { + if (!isprint(c) && !isspace(c)) + c |= 0x40; + if (lastc != '\r' || c != '\n') + lastc = c; + else { + lastc = '\n'; + continue; + } + } + putchar(c); + } + if (lastc != '\n') + putchar('\n'); + putchar('\n'); + (void)fclose(fp); +} |