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 2005 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 /* 36 * Finger server. 37 */ 38 #include <sys/types.h> 39 #include <netinet/in.h> 40 #include <sys/socket.h> 41 #include <stdio.h> 42 #include <ctype.h> 43 44 #define MAXARGS 10 45 46 void fatal(char *prog, char *s); 47 48 int 49 main(argc, argv) 50 int argc; 51 char *argv[]; 52 { 53 register char *sp; 54 char line[512]; 55 struct sockaddr_storage sin; 56 pid_t pid, w; 57 int i, p[2], status; 58 FILE *fp; 59 char *av[MAXARGS + 1]; 60 61 i = sizeof (sin); 62 if (getpeername(0, (struct sockaddr *)&sin, &i) < 0) 63 fatal(argv[0], "getpeername"); 64 line[0] = '\0'; 65 if (fgets(line, sizeof (line), stdin) == NULL) 66 exit(1); 67 sp = line; 68 av[0] = "finger"; 69 i = 1; 70 71 /* skip past leading white space */ 72 while (isspace(*sp)) 73 sp++; 74 75 /* 76 * The finger protocol says a "/W" switch means verbose output. 77 * We explicitly set either the "long" or "short" output flags 78 * to the finger program so that we don't have to know what what 79 * the "finger" program's default is. 80 */ 81 if (*sp == '/' && (sp[1] == 'W' || sp[1] == 'w')) { 82 sp += 2; 83 av[i++] = "-l"; 84 } else { 85 av[i++] = "-s"; 86 } 87 88 /* look for username arguments */ 89 while (i < MAXARGS) { 90 91 /* skip over leading white space */ 92 while (isspace(*sp)) 93 sp++; 94 95 /* check for end of "command line" */ 96 if (*sp == '\0') 97 break; 98 99 /* pick up another name argument */ 100 av[i++] = sp; 101 while ((*sp != '\0') && !isspace(*sp)) 102 sp++; 103 104 /* check again for end of "command line" */ 105 if (*sp == '\0') 106 break; 107 else 108 *sp++ = '\0'; 109 } 110 111 av[i] = (char *)0; 112 if (pipe(p) < 0) 113 fatal(argv[0], "pipe"); 114 115 if ((pid = fork()) == 0) { 116 close(p[0]); 117 if (p[1] != 1) { 118 dup2(p[1], 1); 119 close(p[1]); 120 } 121 execv("/usr/bin/finger", av); 122 printf("No local finger program found\n"); 123 fflush(stdout); 124 _exit(1); 125 } 126 if (pid == (pid_t)-1) 127 fatal(argv[0], "fork"); 128 close(p[1]); 129 if ((fp = fdopen(p[0], "r")) == NULL) 130 fatal(argv[0], "fdopen"); 131 while ((i = getc(fp)) != EOF) { 132 if (i == '\n') 133 putchar('\r'); 134 putchar(i); 135 } 136 fclose(fp); 137 while ((w = wait(&status)) != pid && w != (pid_t)-1) 138 ; 139 return (0); 140 } 141 142 void 143 fatal(prog, s) 144 char *prog, *s; 145 { 146 147 fprintf(stderr, "%s: ", prog); 148 perror(s); 149 exit(1); 150 } 151