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 #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 void fatal(char *prog, char *s); 49 50 int 51 main(argc, argv) 52 int argc; 53 char *argv[]; 54 { 55 register char *sp; 56 char line[512]; 57 struct sockaddr_storage sin; 58 pid_t pid, w; 59 int i, p[2], status; 60 FILE *fp; 61 char *av[MAXARGS + 1]; 62 63 i = sizeof (sin); 64 if (getpeername(0, (struct sockaddr *)&sin, &i) < 0) 65 fatal(argv[0], "getpeername"); 66 line[0] = '\0'; 67 if (fgets(line, sizeof (line), stdin) == NULL) 68 exit(1); 69 sp = line; 70 av[0] = "finger"; 71 i = 1; 72 73 /* skip past leading white space */ 74 while (isspace(*sp)) 75 sp++; 76 77 /* 78 * The finger protocol says a "/W" switch means verbose output. 79 * We explicitly set either the "long" or "short" output flags 80 * to the finger program so that we don't have to know what what 81 * the "finger" program's default is. 82 */ 83 if (*sp == '/' && (sp[1] == 'W' || sp[1] == 'w')) { 84 sp += 2; 85 av[i++] = "-l"; 86 } else { 87 av[i++] = "-s"; 88 } 89 90 /* look for username arguments */ 91 while (i < MAXARGS) { 92 93 /* skip over leading white space */ 94 while (isspace(*sp)) 95 sp++; 96 97 /* check for end of "command line" */ 98 if (*sp == '\0') 99 break; 100 101 /* pick up another name argument */ 102 av[i++] = sp; 103 while ((*sp != '\0') && !isspace(*sp)) 104 sp++; 105 106 /* check again for end of "command line" */ 107 if (*sp == '\0') 108 break; 109 else 110 *sp++ = '\0'; 111 } 112 113 av[i] = (char *)0; 114 if (pipe(p) < 0) 115 fatal(argv[0], "pipe"); 116 117 if ((pid = fork()) == 0) { 118 close(p[0]); 119 if (p[1] != 1) { 120 dup2(p[1], 1); 121 close(p[1]); 122 } 123 execv("/usr/bin/finger", av); 124 printf("No local finger program found\n"); 125 fflush(stdout); 126 _exit(1); 127 } 128 if (pid == (pid_t)-1) 129 fatal(argv[0], "fork"); 130 close(p[1]); 131 if ((fp = fdopen(p[0], "r")) == NULL) 132 fatal(argv[0], "fdopen"); 133 while ((i = getc(fp)) != EOF) { 134 if (i == '\n') 135 putchar('\r'); 136 putchar(i); 137 } 138 fclose(fp); 139 while ((w = wait(&status)) != pid && w != (pid_t)-1) 140 ; 141 return (0); 142 } 143 144 void 145 fatal(prog, s) 146 char *prog, *s; 147 { 148 149 fprintf(stderr, "%s: ", prog); 150 perror(s); 151 exit(1); 152 } 153