diff options
Diffstat (limited to 'mit-pthreads/bin/finger/net.c')
| -rwxr-xr-x | mit-pthreads/bin/finger/net.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/mit-pthreads/bin/finger/net.c b/mit-pthreads/bin/finger/net.c new file mode 100755 index 00000000000..77ccd92ee8c --- /dev/null +++ b/mit-pthreads/bin/finger/net.c @@ -0,0 +1,189 @@ +/* ==== net.c ============================================================ + * Copyright (c) 1993, 1995 by Chris Provenzano, proven@athena.mit.edu + * + * Copyright (c) 1989 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. + * + * 1.00 93/08/26 proven + * -Pthread redesign of this file. + */ + +#include <pthreadutil.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/param.h> +#include <netinet/in.h> +#include <stdlib.h> +#include <string.h> +#include <netdb.h> +#include <stdio.h> +#include <ctype.h> + +#ifndef MAXHOSTNAMELEN +#define MAXHOSTNAMELEN 64 +#endif +/* + * These globals are set initialy and then are only read. + * They do not need mutexes. + */ +extern int lflag; +char myhostname[MAXHOSTNAMELEN]; + +/* + * These globals change and therefor do need mutexes + */ +pthread_mutex_t spmutex = PTHREAD_MUTEX_INITIALIZER; +pthread_cond_t spcond = PTHREAD_COND_INITIALIZER; +struct servent *sp = NULL; + +void netsetup(void) +{ + pthread_mutex_lock(&spmutex); + if (sp) { + fprintf(stderr, "finger: service pointer already initialized.\n"); + exit(2); + } + if ((sp = (struct servent *)malloc(sizeof(struct servent) + 4096)) == NULL){ + fprintf(stderr, "finger: Couldn't allocate service pointer.\n"); + exit(2); + } + if (getservbyname_r("finger", "tcp", sp, (char *)sp + sizeof(struct servent), 4096) == NULL) { + fprintf(stderr, "finger: tcp/finger: unknown service\n"); + exit(2); + } + if (gethostname(myhostname, MAXHOSTNAMELEN)) { + fprintf(stderr, "finger: couldn't get my hostname.\n"); + exit(2); + } + pthread_cond_broadcast(&spcond); + pthread_mutex_unlock(&spmutex); +} + +void netsetupwait(void) +{ + pthread_mutex_lock(&spmutex); + while(sp == NULL) { + pthread_cond_wait(&spcond, &spmutex); + } + pthread_mutex_unlock(&spmutex); +} + +void *netfinger(char *name) +{ + pthread_atexit_t atexit_id; + register int c, lastc; + struct in_addr defaddr; + struct hostent *hp; + struct sockaddr_in sin; + int s, i, readbuflen; + char readbuf[1024]; + char *host; + + netsetupwait(); + pthread_atexit_add(&atexit_id, fflush_nrv, NULL); + + if (!(host = strrchr(name, '@'))) { + host = myhostname; + } else { + *host++ = '\0'; + } + if (!(hp = gethostbyname(host))) { + if ((defaddr.s_addr = inet_addr(host)) < 0) { + fprintf(stderr, "[%s] gethostbyname: Unknown host\n", host); + return; + } + } + sin.sin_family = hp->h_addrtype; + memcpy((char *)&sin.sin_addr, hp->h_addr, hp->h_length); + sin.sin_port = sp->s_port; + + if ((s = socket(sin.sin_family, SOCK_STREAM, 0)) < 0) { + sprintf(readbuf, "[%s]: socket", hp->h_name); + perror(readbuf); + return; + } + + /* have network connection; identify the host connected with */ + if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { + sprintf(readbuf, "[%s]: connect", hp->h_name); + perror(readbuf); + close(s); + return; + } + + /* -l flag for remote fingerd */ + if (lflag) + write(s, "/W ", 3); + /* send the name followed by <CR><LF> */ + write(s, name, strlen(name)); + 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, or + * until the thread timeout expires. + * + * 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. + */ + for (readbuflen = read(s, readbuf, 1024), flockfile(stdout), lastc = '\n', + printf("[%s]\n", hp->h_name); readbuflen > 0; + readbuflen = read(s, readbuf, 1024)) { + for (i = 0; i < readbuflen; i++) { + c = readbuf[i] & 0x7f; + if (c == 0x0d) { + c = '\n'; + lastc = '\r'; + } else { + if (!isprint(c) && !isspace(c)) + c |= 0x40; + if (lastc != '\r' || c != '\n') + lastc = c; + else { + lastc = '\n'; + continue; + } + } + putchar_unlocked(c); + } + } + if (lastc != '\n') + putchar_unlocked('\n'); + funlockfile(stdout); +} |