1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 /* 38 * Finger server. 39 */ 40 #include <sys/types.h> 41 #include <netinet/in.h> 42 #include <sys/socket.h> 43 #include <stdio.h> 44 #include <ctype.h> 45 46 #define MAXARGS 10 47 48 main(argc, argv) 49 char *argv[]; 50 { 51 register char *sp; 52 char line[512]; 53 struct sockaddr_storage sin; 54 pid_t pid, w; 55 int i, p[2], status; 56 FILE *fp; 57 char *av[MAXARGS + 1]; 58 59 i = sizeof (sin); 60 if (getpeername(0, (struct sockaddr *)&sin, &i) < 0) 61 fatal(argv[0], "getpeername"); 62 line[0] = '\0'; 63 if (fgets(line, sizeof (line), stdin) == NULL) 64 exit(1); 65 sp = line; 66 av[0] = "finger"; 67 i = 1; 68 69 /* skip past leading white space */ 70 while (isspace(*sp)) 71 sp++; 72 73 /* 74 * The finger protocol says a "/W" switch means verbose output. 75 * We explicitly set either the "long" or "short" output flags 76 * to the finger program so that we don't have to know what what 77 * the "finger" program's default is. 78 */ 79 if (*sp == '/' && (sp[1] == 'W' || sp[1] == 'w')) { 80 sp += 2; 81 av[i++] = "-l"; 82 } else { 83 av[i++] = "-s"; 84 } 85 86 /* look for username arguments */ 87 while (i < MAXARGS) { 88 89 /* skip over leading white space */ 90 while (isspace(*sp)) 91 sp++; 92 93 /* check for end of "command line" */ 94 if (*sp == '\0') 95 break; 96 97 /* pick up another name argument */ 98 av[i++] = sp; 99 while ((*sp != '\0') && !isspace(*sp)) 100 sp++; 101 102 /* check again for end of "command line" */ 103 if (*sp == '\0') 104 break; 105 else 106 *sp++ = '\0'; 107 } 108 109 av[i] = (char *)0; 110 if (pipe(p) < 0) 111 fatal(argv[0], "pipe"); 112 113 if ((pid = fork()) == 0) { 114 close(p[0]); 115 if (p[1] != 1) { 116 dup2(p[1], 1); 117 close(p[1]); 118 } 119 execv("/usr/bin/finger", av); 120 printf("No local finger program found\n"); 121 fflush(stdout); 122 _exit(1); 123 } 124 if (pid == (pid_t)-1) 125 fatal(argv[0], "fork"); 126 close(p[1]); 127 if ((fp = fdopen(p[0], "r")) == NULL) 128 fatal(argv[0], "fdopen"); 129 while ((i = getc(fp)) != EOF) { 130 if (i == '\n') 131 putchar('\r'); 132 putchar(i); 133 } 134 fclose(fp); 135 while ((w = wait(&status)) != pid && w != (pid_t)-1) 136 ; 137 return (0); 138 } 139 140 fatal(prog, s) 141 char *prog, *s; 142 { 143 144 fprintf(stderr, "%s: ", prog); 145 perror(s); 146 exit(1); 147 } 148