11573Srgrimes/* 21573Srgrimes * Copyright (c) 1989, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 4. Neither the name of the University nor the names of its contributors 141573Srgrimes * may be used to endorse or promote products derived from this software 151573Srgrimes * without specific prior written permission. 161573Srgrimes * 171573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271573Srgrimes * SUCH DAMAGE. 281573Srgrimes */ 291573Srgrimes 301573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 311573Srgrimesstatic char sccsid[] = "@(#)getttyent.c 8.1 (Berkeley) 6/4/93"; 321573Srgrimes#endif /* LIBC_SCCS and not lint */ 3390045Sobrien#include <sys/cdefs.h> 3490045Sobrien__FBSDID("$FreeBSD: releng/10.2/lib/libc/gen/getttyent.c 267236 2014-06-08 17:50:07Z nwhitehorn $"); 351573Srgrimes 361573Srgrimes#include <ttyent.h> 371573Srgrimes#include <stdio.h> 3819031Sjoerg#include <stdlib.h> 391573Srgrimes#include <ctype.h> 401573Srgrimes#include <string.h> 411573Srgrimes 42267236Snwhitehorn#include <sys/types.h> 43267236Snwhitehorn#include <sys/sysctl.h> 44267236Snwhitehorn 451573Srgrimesstatic char zapchar; 461573Srgrimesstatic FILE *tf; 4719031Sjoergstatic size_t lbsize; 4819031Sjoergstatic char *line; 491573Srgrimes 5019031Sjoerg#define MALLOCCHUNK 100 5119031Sjoerg 5290045Sobrienstatic char *skip(char *); 5390045Sobrienstatic char *value(char *); 5419031Sjoerg 551573Srgrimesstruct ttyent * 56200150Sedgetttynam(const char *tty) 571573Srgrimes{ 5890045Sobrien struct ttyent *t; 591573Srgrimes 6024899Sdavidn if (strncmp(tty, "/dev/", 5) == 0) 6124893Sdavidn tty += 5; 621573Srgrimes setttyent(); 6317141Sjkh while ( (t = getttyent()) ) 641573Srgrimes if (!strcmp(tty, t->ty_name)) 651573Srgrimes break; 661573Srgrimes endttyent(); 671573Srgrimes return (t); 681573Srgrimes} 691573Srgrimes 70267236Snwhitehornstatic int 71267236Snwhitehornauto_tty_status(const char *ty_name) 72267236Snwhitehorn{ 73267236Snwhitehorn size_t len; 74267236Snwhitehorn char *buf, *cons, *nextcons; 75267236Snwhitehorn 76267236Snwhitehorn /* Check if this is an enabled kernel console line */ 77267236Snwhitehorn buf = NULL; 78267236Snwhitehorn if (sysctlbyname("kern.console", NULL, &len, NULL, 0) == -1) 79267236Snwhitehorn return (0); /* Errors mean don't enable */ 80267236Snwhitehorn buf = malloc(len); 81267236Snwhitehorn if (sysctlbyname("kern.console", buf, &len, NULL, 0) == -1) 82267236Snwhitehorn goto done; 83267236Snwhitehorn 84267236Snwhitehorn if ((cons = strchr(buf, '/')) == NULL) 85267236Snwhitehorn goto done; 86267236Snwhitehorn *cons = '\0'; 87267236Snwhitehorn nextcons = buf; 88267236Snwhitehorn while ((cons = strsep(&nextcons, ",")) != NULL && strlen(cons) != 0) { 89267236Snwhitehorn if (strcmp(cons, ty_name) == 0) { 90267236Snwhitehorn free(buf); 91267236Snwhitehorn return (TTY_ON); 92267236Snwhitehorn } 93267236Snwhitehorn } 94267236Snwhitehorn 95267236Snwhitehorndone: 96267236Snwhitehorn free(buf); 97267236Snwhitehorn return (0); 98267236Snwhitehorn} 99267236Snwhitehorn 1001573Srgrimesstruct ttyent * 101200150Sedgetttyent(void) 1021573Srgrimes{ 1031573Srgrimes static struct ttyent tty; 10490045Sobrien char *p; 10590045Sobrien int c; 10619031Sjoerg size_t i; 1071573Srgrimes 1081573Srgrimes if (!tf && !setttyent()) 1091573Srgrimes return (NULL); 1101573Srgrimes for (;;) { 111203068Sed if (!fgets(p = line, lbsize, tf)) 1121573Srgrimes return (NULL); 11319031Sjoerg /* extend buffer if line was too big, and retry */ 114229403Sed while (!strchr(p, '\n') && !feof(tf)) { 11519031Sjoerg i = strlen(p); 11619031Sjoerg lbsize += MALLOCCHUNK; 11719082Sjoerg if ((p = realloc(line, lbsize)) == NULL) { 11819031Sjoerg (void)endttyent(); 11919031Sjoerg return (NULL); 12019031Sjoerg } 12119082Sjoerg line = p; 12219031Sjoerg if (!fgets(&line[i], lbsize - i, tf)) 12319031Sjoerg return (NULL); 1241573Srgrimes } 12552856Sache while (isspace((unsigned char)*p)) 1261573Srgrimes ++p; 1271573Srgrimes if (*p && *p != '#') 1281573Srgrimes break; 1291573Srgrimes } 1301573Srgrimes 13152856Sache#define scmp(e) !strncmp(p, e, sizeof(e) - 1) && isspace((unsigned char)p[sizeof(e) - 1]) 13224893Sdavidn#define vcmp(e) !strncmp(p, e, sizeof(e) - 1) && p[sizeof(e) - 1] == '=' 13324893Sdavidn 1341573Srgrimes zapchar = 0; 1351573Srgrimes tty.ty_name = p; 136148401Smdodd tty.ty_status = 0; 137148401Smdodd tty.ty_window = NULL; 138148401Smdodd tty.ty_group = _TTYS_NOGROUP; 139148401Smdodd 1401573Srgrimes p = skip(p); 1411573Srgrimes if (!*(tty.ty_getty = p)) 1421573Srgrimes tty.ty_getty = tty.ty_type = NULL; 1431573Srgrimes else { 1441573Srgrimes p = skip(p); 1451573Srgrimes if (!*(tty.ty_type = p)) 1461573Srgrimes tty.ty_type = NULL; 14724893Sdavidn else { 14824893Sdavidn /* compatibility kludge: handle network/dialup specially */ 14924893Sdavidn if (scmp(_TTYS_DIALUP)) 15024893Sdavidn tty.ty_status |= TTY_DIALUP; 15124893Sdavidn else if (scmp(_TTYS_NETWORK)) 15224893Sdavidn tty.ty_status |= TTY_NETWORK; 1531573Srgrimes p = skip(p); 15424893Sdavidn } 1551573Srgrimes } 1561573Srgrimes 1571573Srgrimes for (; *p; p = skip(p)) { 1581573Srgrimes if (scmp(_TTYS_OFF)) 1591573Srgrimes tty.ty_status &= ~TTY_ON; 1601573Srgrimes else if (scmp(_TTYS_ON)) 1611573Srgrimes tty.ty_status |= TTY_ON; 162267236Snwhitehorn else if (scmp(_TTYS_ONIFCONSOLE)) 163267236Snwhitehorn tty.ty_status |= auto_tty_status(tty.ty_name); 1641573Srgrimes else if (scmp(_TTYS_SECURE)) 1651573Srgrimes tty.ty_status |= TTY_SECURE; 16622734Sdavidn else if (scmp(_TTYS_INSECURE)) 16722734Sdavidn tty.ty_status &= ~TTY_SECURE; 16824893Sdavidn else if (scmp(_TTYS_DIALUP)) 16924893Sdavidn tty.ty_status |= TTY_DIALUP; 17024893Sdavidn else if (scmp(_TTYS_NETWORK)) 17124893Sdavidn tty.ty_status |= TTY_NETWORK; 1721573Srgrimes else if (vcmp(_TTYS_WINDOW)) 1731573Srgrimes tty.ty_window = value(p); 17421189Sdavidn else if (vcmp(_TTYS_GROUP)) 17521189Sdavidn tty.ty_group = value(p); 1761573Srgrimes else 1771573Srgrimes break; 1781573Srgrimes } 1791573Srgrimes 1801573Srgrimes if (zapchar == '#' || *p == '#') 1811573Srgrimes while ((c = *++p) == ' ' || c == '\t') 1821573Srgrimes ; 1831573Srgrimes tty.ty_comment = p; 1841573Srgrimes if (*p == 0) 1851573Srgrimes tty.ty_comment = 0; 186229403Sed if ((p = strchr(p, '\n'))) 1871573Srgrimes *p = '\0'; 1881573Srgrimes return (&tty); 1891573Srgrimes} 1901573Srgrimes 1911573Srgrimes#define QUOTED 1 1921573Srgrimes 1931573Srgrimes/* 1941573Srgrimes * Skip over the current field, removing quotes, and return a pointer to 1951573Srgrimes * the next field. 1961573Srgrimes */ 1971573Srgrimesstatic char * 198200150Sedskip(char *p) 1991573Srgrimes{ 20090045Sobrien char *t; 20190045Sobrien int c, q; 2021573Srgrimes 2031573Srgrimes for (q = 0, t = p; (c = *p) != '\0'; p++) { 2041573Srgrimes if (c == '"') { 2051573Srgrimes q ^= QUOTED; /* obscure, but nice */ 2061573Srgrimes continue; 2071573Srgrimes } 2081573Srgrimes if (q == QUOTED && *p == '\\' && *(p+1) == '"') 2091573Srgrimes p++; 2101573Srgrimes *t++ = *p; 2111573Srgrimes if (q == QUOTED) 2121573Srgrimes continue; 2131573Srgrimes if (c == '#') { 2141573Srgrimes zapchar = c; 2151573Srgrimes *p = 0; 2161573Srgrimes break; 2171573Srgrimes } 2181573Srgrimes if (c == '\t' || c == ' ' || c == '\n') { 2191573Srgrimes zapchar = c; 2201573Srgrimes *p++ = 0; 2211573Srgrimes while ((c = *p) == '\t' || c == ' ' || c == '\n') 2221573Srgrimes p++; 2231573Srgrimes break; 2241573Srgrimes } 2251573Srgrimes } 2261573Srgrimes *--t = '\0'; 2271573Srgrimes return (p); 2281573Srgrimes} 2291573Srgrimes 2301573Srgrimesstatic char * 231200150Sedvalue(char *p) 2321573Srgrimes{ 2331573Srgrimes 234229403Sed return ((p = strchr(p, '=')) ? ++p : NULL); 2351573Srgrimes} 2361573Srgrimes 2371573Srgrimesint 238200150Sedsetttyent(void) 2391573Srgrimes{ 2401573Srgrimes 24119031Sjoerg if (line == NULL) { 24219031Sjoerg if ((line = malloc(MALLOCCHUNK)) == NULL) 24319031Sjoerg return (0); 24419031Sjoerg lbsize = MALLOCCHUNK; 24519031Sjoerg } 2461573Srgrimes if (tf) { 2479272Shsu rewind(tf); 2481573Srgrimes return (1); 249244092Sjilles } else if ( (tf = fopen(_PATH_TTYS, "re")) ) 2501573Srgrimes return (1); 2511573Srgrimes return (0); 2521573Srgrimes} 2531573Srgrimes 2541573Srgrimesint 255200150Sedendttyent(void) 2561573Srgrimes{ 2571573Srgrimes int rval; 2581573Srgrimes 25920383Sjoerg /* 26020383Sjoerg * NB: Don't free `line' because getttynam() 26120383Sjoerg * may still be referencing it 26220383Sjoerg */ 2631573Srgrimes if (tf) { 26419031Sjoerg rval = (fclose(tf) != EOF); 2651573Srgrimes tf = NULL; 2661573Srgrimes return (rval); 2671573Srgrimes } 2681573Srgrimes return (1); 2691573Srgrimes} 27024893Sdavidn 27124893Sdavidnstatic int 272200150Sedisttystat(const char *tty, int flag) 27324893Sdavidn{ 27490045Sobrien struct ttyent *t; 27524893Sdavidn 27624893Sdavidn return ((t = getttynam(tty)) == NULL) ? 0 : !!(t->ty_status & flag); 27724893Sdavidn} 27824893Sdavidn 27924893Sdavidn 28024893Sdavidnint 281200150Sedisdialuptty(const char *tty) 28224893Sdavidn{ 28324893Sdavidn 28424893Sdavidn return isttystat(tty, TTY_DIALUP); 28524893Sdavidn} 28624893Sdavidn 287200150Sedint 288200150Sedisnettty(const char *tty) 28924893Sdavidn{ 29024893Sdavidn 29124893Sdavidn return isttystat(tty, TTY_NETWORK); 29224893Sdavidn} 293