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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 #ident "%Z%%M% %I% %E% SMI" /* from SVR4 bnu:dial.c 1.3 */ 27 /*LINTLIBRARY*/ 28 /*************************************************************** 29 * dial() returns an fd for an open tty-line connected to the 30 * specified remote. The caller should trap all ways to 31 * terminate, and call undial(). This will release the `lock' 32 * file and return the outgoing line to the system. This routine 33 * would prefer that the calling routine not use the `alarm()' 34 * system call, nor issue a `signal(SIGALRM, xxx)' call. 35 * If you must, then please save and restore the alarm times. 36 * The sleep() library routine is ok, though. 37 * 38 * #include <sys/types.h> 39 * #include <sys/stat.h> 40 * #include "dial.h" 41 * 42 * int dial(call); 43 * CALL call; 44 * 45 * void undial(rlfd); 46 * int rlfd; 47 * 48 * rlfd is the "remote-lne file descriptor" returned from dial. 49 * 50 * The CALL structure as (defined in dial.h): 51 * 52 * typedef struct { 53 * struct termio *attr; ptr to term attribute structure 54 * int baud; no longer used -- 55 * left in for backwards compatibility 56 * int speed; 212A modem: low=300, high=1200 57 * negative for "Any" speed 58 * char *line; device name for out-going line 59 * char *telno; ptr to tel-no digit string 60 * int modem no longer used -- 61 * left in for backwards compatibility 62 * char *device no longer used -- 63 * left in for backwards compatibility 64 * int dev_len no longer used -- 65 * left in for backwards compatibility 66 * } CALL; 67 * 68 * The error returns from dial are negative, in the range -1 69 * to -13, and their meanings are: 70 * 71 * INTRPT -1: interrupt occured 72 * D_HUNG -2: dialer hung (no return from write) 73 * NO_ANS -3: no answer (caller script failed) 74 * ILL_BD -4: illegal baud-rate 75 * A_PROB -5: acu problem (open() failure) 76 * L_PROB -6: line problem (open() failure) 77 * NO_Ldv -7: can't open Devices file 78 * DV_NT_A -8: specified device not available 79 * DV_NT_K -9: specified device not known 80 * NO_BD_A -10: no device available at requested baud-rate 81 * NO_BD_K -11: no device known at requested baud-rate 82 * DV_NT_E -12: requested speed does not match 83 * BAD_SYS -13: system not in Systems file 84 * 85 * Setting attributes in the termio structure indicated in 86 * the `attr' field of the CALL structure before passing the 87 * structure to dial(), will cause those attributes to be set 88 * before the connection is made. This can be important for 89 * some attributes such as parity and baud. 90 * 91 * With an error return (negative value), there will not be 92 * any `lock-file' entry, so no need to call undial(). 93 ***************************************************************/ 94 95 #include <stdio.h> 96 #include <stdlib.h> 97 #include <string.h> 98 #include <sys/types.h> 99 #include <unistd.h> 100 #include <setjmp.h> 101 #include <sys/stat.h> 102 #include <sys/times.h> 103 #include <fcntl.h> 104 105 #include "dial.h" 106 107 #include "uucp.h" 108 #include "uucpdefs.c" 109 110 #include "callers.c" 111 #include "conn.c" 112 #include "getargs.c" 113 #include "interface.c" 114 #include "line.c" 115 #include "stoa.c" 116 #include "strecpy.c" 117 #include "strsave.c" 118 #include "sysfiles.c" 119 #include "ulockf.c" 120 121 #ifdef DATAKIT 122 #include "dkbreak.c" 123 #include "dkerr.c" 124 #include "dkdial.c" 125 #include "dkminor.c" 126 #include "dtnamer.c" 127 #endif 128 129 static int 130 rlfd; /* fd for remote comm line */ 131 132 GLOBAL jmp_buf Sjbuf; /*needed by connection routines*/ 133 134 /*VARARGS*/ 135 /*ARGSUSED*/ 136 static void 137 assert(s1,s2,i1,s3,i2) 138 char *s1, *s2, *s3; 139 int i1, i2; 140 {} /* for ASSERT in conn() */ 141 142 /*ARGSUSED*/ 143 static void 144 logent(s1,s2) 145 char *s1, *s2; 146 {} /* so we can load unlockf() */ 147 148 static void 149 cleanup(Cn) /*this is executed only in the parent process*/ 150 int Cn; /*fd for remote comm line */ 151 { 152 (void)restline(); 153 (void)setuid(Euid); 154 if(Cn > 0) { 155 (void) close(Cn); 156 } 157 158 159 rmlock((char*) NULL); /*uucp routine in ulockf.c*/ 160 return; /* code=negative for signal causing disconnect*/ 161 } 162 163 int 164 dial(call) 165 CALL call; 166 { 167 char *alt[7]; 168 char speed[10]; /* character value of speed passed to dial */ 169 170 /* set service so we know which Sysfiles entries to use, then */ 171 /* be sure can access Devices file(s). use "cu" entries ... */ 172 /* dial is more like cu than like uucico. */ 173 (void)strcpy(Progname,"cu"); 174 setservice(Progname); 175 if ( sysaccess(EACCESS_DEVICES) != 0 ) { 176 /* can't read Devices file(s) */ 177 return(NO_Ldv); 178 } 179 180 if (call.attr != NULL) { 181 if ( call.attr->c_cflag & PARENB ) { 182 Evenflag = ((call.attr->c_cflag & PARODD) ? 0 : 1); 183 Oddflag = ((call.attr->c_cflag & PARODD) ? 1 : 0); 184 } 185 line_8bit = (call.attr->c_cflag & CS8 ? 1 : 0); 186 } 187 188 if (call.speed <= 0) 189 strcpy(speed,"Any"); 190 else 191 sprintf(speed,"%d",call.speed); 192 193 /* Determine whether contents of "telno" is a system name. */ 194 if ( (call.telno != NULL) && 195 (strlen(call.telno) != strspn(call.telno,"0123456789=-*#")) ) { 196 /* use conn() for system names */ 197 rlfd = conn(call.telno); 198 } else { 199 alt[F_NAME] = "dummy"; /* to replace the Systems file fields */ 200 alt[F_TIME] = "Any"; /* needed for getto(); [F_TYPE] and */ 201 alt[F_TYPE] = ""; /* [F_PHONE] assignment below */ 202 alt[F_CLASS] = speed; 203 alt[F_PHONE] = ""; 204 alt[F_LOGIN] = ""; 205 alt[6] = ""; 206 207 if ( (call.telno != NULL) && (*call.telno != '\0') ) { 208 /* given a phone number, use an ACU */ 209 alt[F_PHONE] = call.telno; 210 alt[F_TYPE] = "ACU"; 211 } else { 212 /* otherwise, use a Direct connection */ 213 alt[F_TYPE] = "Direct"; 214 /* If device name starts with "/dev/", strip it off */ 215 /* since Devices file entries will also be stripped. */ 216 if ( (call.line != NULL) && 217 (strncmp(call.line, "/dev/", 5) == 0) ) 218 Myline = (call.line + 5); 219 else 220 Myline = call.line; 221 } 222 223 #ifdef forfutureuse 224 if (call->class != NULL) 225 alt[F_TYPE] = call->class; 226 #endif 227 228 229 rlfd = getto(alt); 230 } 231 if (rlfd < 0) 232 switch (Uerror) { 233 case SS_NO_DEVICE: return(NO_BD_A); 234 case SS_DIAL_FAILED: return(D_HUNG); 235 case SS_LOCKED_DEVICE: return(DV_NT_A); 236 case SS_BADSYSTEM: return(BAD_SYS); 237 case SS_CANT_ACCESS_DEVICE: return(L_PROB); 238 case SS_CHAT_FAILED: return(NO_ANS); 239 default: return(-Uerror); 240 } 241 (void)savline(); 242 if ((call.attr) && ioctl(rlfd, TCSETA, call.attr) < 0) { 243 perror("stty for remote"); 244 return(L_PROB); 245 } 246 Euid = geteuid(); 247 if(setuid(getuid()) && setgid(getgid()) < 0) 248 undial(rlfd); 249 return(rlfd); 250 } 251 252 /* 253 * undial(fd) 254 */ 255 void 256 undial(fd) 257 int fd; 258 { 259 sethup(fd); 260 sleep(2); 261 cleanup(fd); 262 } 263