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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12 * documentation and/or other materials provided with the distribution.
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.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * $FreeBSD: src/lib/libc/gen/getttyent.c,v 1.13 2005/07/25 17:57:15 mdodd Exp $
34 * $DragonFly: src/lib/libc/gen/getttyent.c,v 1.5 2005/11/13 00:07:42 swildner Exp $
36 * @(#)getttyent.c 8.1 (Berkeley) 6/4/93
39 #include <sys/cdefs.h>
51 static int maxpts = -1;
52 static int curpts = 0;
57 #define MALLOCCHUNK 100
59 static char *skip (char *);
60 static char *value (char *);
63 getttynam(const char *tty)
67 if (strncmp(tty, "/dev/", 5) == 0)
70 while ( (t = getttyent()) )
71 if (!strcmp(tty, t->ty_name))
80 static struct ttyent tty;
81 static char devpts_name[] = "pts/9999999999";
86 if (!tf && !setttyent())
89 if (!fgets(p = line, lbsize, tf)) {
90 if (curpts <= maxpts) {
91 sprintf(devpts_name, "pts/%d", curpts++);
92 tty.ty_name = devpts_name;
95 tty.ty_status = TTY_NETWORK;
97 tty.ty_comment = NULL;
98 tty.ty_group = _TTYS_NOGROUP;
103 /* extend buffer if line was too big, and retry */
104 while (!index(p, '\n') && !feof(tf)) {
106 lbsize += MALLOCCHUNK;
107 if ((p = realloc(line, lbsize)) == NULL) {
112 if (!fgets(&line[i], lbsize - i, tf))
115 while (isspace((unsigned char)*p))
121 #define scmp(e) !strncmp(p, e, sizeof(e) - 1) && isspace((unsigned char)p[sizeof(e) - 1])
122 #define vcmp(e) !strncmp(p, e, sizeof(e) - 1) && p[sizeof(e) - 1] == '='
127 tty.ty_window = NULL;
128 tty.ty_group = _TTYS_NOGROUP;
131 if (!*(tty.ty_getty = p))
132 tty.ty_getty = tty.ty_type = NULL;
135 if (!*(tty.ty_type = p))
138 /* compatibility kludge: handle network/dialup specially */
139 if (scmp(_TTYS_DIALUP))
140 tty.ty_status |= TTY_DIALUP;
141 else if (scmp(_TTYS_NETWORK))
142 tty.ty_status |= TTY_NETWORK;
147 for (; *p; p = skip(p)) {
149 tty.ty_status &= ~TTY_ON;
150 else if (scmp(_TTYS_ON))
151 tty.ty_status |= TTY_ON;
152 else if (scmp(_TTYS_SECURE))
153 tty.ty_status |= TTY_SECURE;
154 else if (scmp(_TTYS_INSECURE))
155 tty.ty_status &= ~TTY_SECURE;
156 else if (scmp(_TTYS_DIALUP))
157 tty.ty_status |= TTY_DIALUP;
158 else if (scmp(_TTYS_NETWORK))
159 tty.ty_status |= TTY_NETWORK;
160 else if (vcmp(_TTYS_WINDOW))
161 tty.ty_window = value(p);
162 else if (vcmp(_TTYS_GROUP))
163 tty.ty_group = value(p);
168 if (zapchar == '#' || *p == '#')
169 while ((c = *++p) == ' ' || c == '\t')
174 if ( (p = index(p, '\n')) )
182 * Skip over the current field, removing quotes, and return a pointer to
191 for (q = 0, t = p; (c = *p) != '\0'; p++) {
193 q ^= QUOTED; /* obscure, but nice */
196 if (q == QUOTED && *p == '\\' && *(p+1) == '"')
206 if (c == '\t' || c == ' ' || c == '\n') {
209 while ((c = *p) == '\t' || c == ' ' || c == '\n')
222 return ((p = index(p, '=')) ? ++p : NULL);
233 if ((line = malloc(MALLOCCHUNK)) == NULL)
235 lbsize = MALLOCCHUNK;
237 devpts_dir = opendir(_PATH_DEV PTS);
240 while ((dp = readdir(devpts_dir))) {
241 if (strcmp(dp->d_name, ".") == 0 ||
242 strcmp(dp->d_name, "..") == 0)
245 unit = (int)strtol(dp->d_name, NULL, 10);
252 closedir(devpts_dir);
257 } else if ( (tf = fopen(_PATH_TTYS, "r")) )
269 * NB: Don't free `line' because getttynam()
270 * may still be referencing it
273 rval = (fclose(tf) != EOF);
281 isttystat(const char *tty, int flag)
285 return ((t = getttynam(tty)) == NULL) ? 0 : !!(t->ty_status & flag);
290 isdialuptty(const char *tty)
293 return isttystat(tty, TTY_DIALUP);
297 isnettty(const char *tty)
300 return isttystat(tty, TTY_NETWORK);