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 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 /* 34 * ************************************************************* 35 * dial() returns an fd for an open tty-line connected to the 36 * specified remote. The caller should trap all ways to 37 * terminate, and call undial(). This will release the `lock' 38 * file and return the outgoing line to the system. This routine 39 * would prefer that the calling routine not use the `alarm()' 40 * system call, nor issue a `signal(SIGALRM, xxx)' call. 41 * If you must, then please save and restore the alarm times. 42 * The sleep() library routine is ok, though. 43 * 44 * #include <sys/types.h> 45 * #include <sys/stat.h> 46 * #include "dial.h" 47 * 48 * int dial(call); 49 * CALL call; 50 * 51 * void undial(rlfd); 52 * int rlfd; 53 * 54 * rlfd is the "remote-lne file descriptor" returned from dial. 55 * 56 * The CALL structure as (defined in dial.h): 57 * 58 * typedef struct { 59 * struct termio *attr; ptr to term attribute structure 60 * int baud; no longer used -- 61 * left in for backwards compatibility 62 * int speed; 212A modem: low=300, high=1200 63 * negative for "Any" speed 64 * char *line; device name for out-going line 65 * char *telno; ptr to tel-no digit string 66 * int modem no longer used -- 67 * left in for backwards compatibility 68 * char *device no longer used -- 69 * left in for backwards compatibility 70 * int dev_len no longer used -- 71 * left in for backwards compatibility 72 * } CALL; 73 * 74 * The error returns from dial are negative, in the range -1 75 * to -13, and their meanings are: 76 * 77 * INTRPT -1: interrupt occured 78 * D_HUNG -2: dialer hung (no return from write) 79 * NO_ANS -3: no answer (caller script failed) 80 * ILL_BD -4: illegal baud-rate 81 * A_PROB -5: acu problem (open() failure) 82 * L_PROB -6: line problem (open() failure) 83 * NO_Ldv -7: can't open Devices file 84 * DV_NT_A -8: specified device not available 85 * DV_NT_K -9: specified device not known 86 * NO_BD_A -10: no dev available at requested baud-rate 87 * NO_BD_K -11: no device known at requested baud-rate 88 * DV_NT_E -12: requested speed does not match 89 * BAD_SYS -13: system not in Systems file 90 * 91 * Setting attributes in the termio structure indicated in 92 * the `attr' field of the CALL structure before passing the 93 * structure to dial(), will cause those attributes to be set 94 * before the connection is made. This can be important for 95 * some attributes such as parity and baud. 96 * 97 * With an error return (negative value), there will not be 98 * any `lock-file' entry, so no need to call undial(). 99 * ************************************************************* 100 */ 101 102 #include <stdio.h> 103 #include <stdlib.h> 104 #include <string.h> 105 #include <sys/types.h> 106 #include <unistd.h> 107 #include <setjmp.h> 108 #include <sys/stat.h> 109 #include <sys/times.h> 110 111 #include "dial.h" 112 113 #include "uucp.h" 114 #include "uucpdefs.c" 115 116 #include "callers.c" 117 #include "conn.c" 118 #include "getargs.c" 119 #include "interface.c" 120 #include "line.c" 121 #include "stoa.c" 122 #include "strecpy.c" 123 #include "strsave.c" 124 #include "sysfiles.c" 125 #include "ulockf.c" 126 127 static int rlfd; /* fd for remote comm line */ 128 129 static jmp_buf Sjbuf; /* needed by connection routines */ 130 131 /* VARARGS */ 132 /* ARGSUSED */ 133 static void 134 assert(const char *s1, const char *s2, int i1, const char *s3, int i2) 135 { /* for ASSERT in conn() */ 136 } 137 138 /* ARGSUSED */ 139 static void 140 logent(const char *s1, const char *s2) 141 { /* so we can load unlockf() */ 142 } 143 144 static void 145 cleanup(int Cn) /* this is executed only in the parent process */ 146 { 147 (void) restline(); 148 (void) setuid(Euid); 149 if (Cn > 0) 150 (void) close(Cn); 151 152 rmlock(NULL); /* uucp routine in ulockf.c */ 153 } 154 155 int 156 dial(CALL call) 157 { 158 char *alt[7]; 159 char speed[10]; /* character value of speed passed to dial */ 160 161 /* set service so we know which Sysfiles entries to use, then */ 162 /* be sure can access Devices file(s). use "cu" entries ... */ 163 /* dial is more like cu than like uucico. */ 164 165 (void) strcpy(Progname, "cu"); 166 setservice(Progname); 167 if (sysaccess(EACCESS_DEVICES) != 0) 168 /* can't read Devices file(s) */ 169 return (NO_Ldv); 170 171 if (call.attr != NULL) { 172 if (call.attr->c_cflag & PARENB) { 173 Evenflag = ((call.attr->c_cflag & PARODD) ? 0 : 1); 174 Oddflag = ((call.attr->c_cflag & PARODD) ? 1 : 0); 175 } 176 line_8bit = (call.attr->c_cflag & CS8 ? 1 : 0); 177 } 178 179 if (call.speed <= 0) 180 (void) strcpy(speed, "Any"); 181 else 182 (void) sprintf(speed, "%d", call.speed); 183 184 /* Determine whether contents of "telno" is a system name. */ 185 if ((call.telno != NULL) && 186 (strlen(call.telno) != strspn(call.telno, "0123456789=-*#"))) { 187 /* use conn() for system names */ 188 rlfd = conn(call.telno); 189 } else { 190 alt[F_NAME] = "dummy"; /* to replace the Systems file fields */ 191 alt[F_TIME] = "Any"; /* needed for getto(); [F_TYPE] and */ 192 alt[F_TYPE] = ""; /* [F_PHONE] assignment below */ 193 alt[F_CLASS] = speed; 194 alt[F_PHONE] = ""; 195 alt[F_LOGIN] = ""; 196 alt[6] = ""; 197 198 if ((call.telno != NULL) && (*call.telno != '\0')) { 199 /* given a phone number, use an ACU */ 200 alt[F_PHONE] = call.telno; 201 alt[F_TYPE] = "ACU"; 202 } else { 203 /* otherwise, use a Direct connection */ 204 alt[F_TYPE] = "Direct"; 205 /* If device name starts with "/dev/", strip it off */ 206 /* since Devices file entries will also be stripped. */ 207 if ((call.line != NULL) && 208 (strncmp(call.line, "/dev/", 5) == 0)) 209 Myline = (call.line + 5); 210 else 211 Myline = call.line; 212 } 213 214 #ifdef forfutureuse 215 if (call->class != NULL) 216 alt[F_TYPE] = call->class; 217 #endif 218 219 220 rlfd = getto(alt); 221 } 222 if (rlfd < 0) 223 switch (Uerror) { 224 case SS_NO_DEVICE: 225 return (NO_BD_A); 226 case SS_DIAL_FAILED: 227 return (D_HUNG); 228 case SS_LOCKED_DEVICE: 229 return (DV_NT_A); 230 case SS_BADSYSTEM: 231 return (BAD_SYS); 232 case SS_CANT_ACCESS_DEVICE: 233 return (L_PROB); 234 case SS_CHAT_FAILED: 235 return (NO_ANS); 236 default: 237 return (-Uerror); 238 } 239 (void) savline(); 240 if ((call.attr) && ioctl(rlfd, TCSETA, call.attr) < 0) { 241 perror("stty for remote"); 242 return (L_PROB); 243 } 244 Euid = geteuid(); 245 if (setuid(getuid()) && setgid(getgid()) < 0) 246 undial(rlfd); 247 return (rlfd); 248 } 249 250 /* 251 * undial(fd) 252 */ 253 void 254 undial(int fd) 255 { 256 sethup(fd); 257 (void) sleep(2); 258 cleanup(fd); 259 } 260