2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
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18 * may be used to endorse or promote products derived from this software
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33 * $FreeBSD: src/lib/libc/gen/getttyent.c,v 1.13 2005/07/25 17:57:15 mdodd Exp $
35 * @(#)getttyent.c 8.1 (Berkeley) 6/4/93
48 static int maxpts = -1;
49 static int curpts = 0;
54 #define MALLOCCHUNK 100
56 static char *skip (char *);
57 static char *value (char *);
60 getttynam(const char *tty)
64 if (strncmp(tty, "/dev/", 5) == 0)
67 while ( (t = getttyent()) )
68 if (!strcmp(tty, t->ty_name))
77 static struct ttyent tty;
78 static char devpts_name[] = "pts/9999999999";
83 if (!tf && !setttyent())
86 if (!fgets(p = line, lbsize, tf)) {
87 if (curpts <= maxpts) {
88 sprintf(devpts_name, "pts/%d", curpts++);
89 tty.ty_name = devpts_name;
92 tty.ty_status = TTY_NETWORK;
94 tty.ty_comment = NULL;
95 tty.ty_group = _TTYS_NOGROUP;
100 /* extend buffer if line was too big, and retry */
101 while (!index(p, '\n') && !feof(tf)) {
103 lbsize += MALLOCCHUNK;
104 if ((p = realloc(line, lbsize)) == NULL) {
109 if (!fgets(&line[i], lbsize - i, tf))
112 while (isspace((unsigned char)*p))
118 #define scmp(e) !strncmp(p, e, sizeof(e) - 1) && isspace((unsigned char)p[sizeof(e) - 1])
119 #define vcmp(e) !strncmp(p, e, sizeof(e) - 1) && p[sizeof(e) - 1] == '='
124 tty.ty_window = NULL;
125 tty.ty_group = _TTYS_NOGROUP;
128 if (!*(tty.ty_getty = p))
129 tty.ty_getty = tty.ty_type = NULL;
132 if (!*(tty.ty_type = p))
135 /* compatibility kludge: handle network/dialup specially */
136 if (scmp(_TTYS_DIALUP))
137 tty.ty_status |= TTY_DIALUP;
138 else if (scmp(_TTYS_NETWORK))
139 tty.ty_status |= TTY_NETWORK;
144 for (; *p; p = skip(p)) {
146 tty.ty_status &= ~TTY_ON;
147 else if (scmp(_TTYS_ON))
148 tty.ty_status |= TTY_ON;
149 else if (scmp(_TTYS_SECURE))
150 tty.ty_status |= TTY_SECURE;
151 else if (scmp(_TTYS_INSECURE))
152 tty.ty_status &= ~TTY_SECURE;
153 else if (scmp(_TTYS_DIALUP))
154 tty.ty_status |= TTY_DIALUP;
155 else if (scmp(_TTYS_NETWORK))
156 tty.ty_status |= TTY_NETWORK;
157 else if (vcmp(_TTYS_WINDOW))
158 tty.ty_window = value(p);
159 else if (vcmp(_TTYS_GROUP))
160 tty.ty_group = value(p);
165 if (zapchar == '#' || *p == '#')
166 while ((c = *++p) == ' ' || c == '\t')
171 if ( (p = index(p, '\n')) )
179 * Skip over the current field, removing quotes, and return a pointer to
188 for (q = 0, t = p; (c = *p) != '\0'; p++) {
190 q ^= QUOTED; /* obscure, but nice */
193 if (q == QUOTED && *p == '\\' && *(p+1) == '"')
203 if (c == '\t' || c == ' ' || c == '\n') {
206 while ((c = *p) == '\t' || c == ' ' || c == '\n')
219 return ((p = index(p, '=')) ? ++p : NULL);
230 if ((line = malloc(MALLOCCHUNK)) == NULL)
232 lbsize = MALLOCCHUNK;
234 devpts_dir = opendir(_PATH_DEV PTS);
237 while ((dp = readdir(devpts_dir))) {
238 if (strcmp(dp->d_name, ".") == 0 ||
239 strcmp(dp->d_name, "..") == 0)
242 unit = (int)strtol(dp->d_name, NULL, 10);
249 closedir(devpts_dir);
254 } else if ( (tf = fopen(_PATH_TTYS, "r")) )
266 * NB: Don't free `line' because getttynam()
267 * may still be referencing it
270 rval = (fclose(tf) != EOF);
278 isttystat(const char *tty, int flag)
282 return ((t = getttynam(tty)) == NULL) ? 0 : !!(t->ty_status & flag);
287 isdialuptty(const char *tty)
290 return isttystat(tty, TTY_DIALUP);
294 isnettty(const char *tty)
297 return isttystat(tty, TTY_NETWORK);