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33 * $FreeBSD: src/lib/libc/gen/ttyname.c,v 1.10.6.2 2002/10/15 19:46:46 fjoe Exp $
34 * $DragonFly: src/lib/libc/gen/ttyname.c,v 1.4 2004/06/06 15:05:55 hmp Exp $
36 * @(#)ttyname.c 8.2 (Berkeley) 1/27/94
39 #include <sys/types.h>
52 #include "pthread_private.h"
53 static struct pthread_mutex _ttyname_lockd = PTHREAD_MUTEX_STATIC_INITIALIZER;
54 static pthread_mutex_t ttyname_lock = &_ttyname_lockd;
55 static pthread_key_t ttyname_key;
56 static int ttyname_init = 0;
63 if (_FD_LOCK(fd, FD_READ, NULL) == 0) {
64 ret = __ttyname_basic(fd);
65 _FD_UNLOCK(fd, FD_READ);
74 __ttyname_r_basic(int fd, char *buf, size_t len)
85 /* Must be a terminal. */
88 /* Must be a character device. */
89 if (__sys_fstat(fd, &sb) || !S_ISCHR(sb.st_mode))
91 /* Must have enough room */
92 if (len <= sizeof(_PATH_DEV))
95 if ((dp = opendir(_PATH_DEV)) != NULL) {
96 memcpy(buf, _PATH_DEV, sizeof(_PATH_DEV));
97 for (rval = NULL; (dirp = readdir(dp)) != NULL;) {
98 if (dirp->d_fileno != sb.st_ino)
100 minlen = (len - (sizeof(_PATH_DEV) - 1)) < (dirp->d_namlen + 1) ?
101 (len - (sizeof(_PATH_DEV) - 1)) : (dirp->d_namlen + 1);
102 memcpy(buf + sizeof(_PATH_DEV) - 1, dirp->d_name, minlen);
103 if (stat(buf, &dsb) || sb.st_dev != dsb.st_dev ||
104 sb.st_ino != dsb.st_ino)
115 __ttyname_basic(int fd)
119 pthread_mutex_lock(&ttyname_lock);
120 if (ttyname_init == 0) {
121 if (pthread_key_create(&ttyname_key, free)) {
122 pthread_mutex_unlock(&ttyname_lock);
127 pthread_mutex_unlock(&ttyname_lock);
129 /* Must have thread specific data field to put data */
130 if ((buf = pthread_getspecific(ttyname_key)) == NULL) {
131 if ((buf = malloc(sizeof(_PATH_DEV) + MAXNAMLEN)) != NULL) {
132 if (pthread_setspecific(ttyname_key, buf) != 0) {
140 return (__ttyname_r_basic(fd, buf, sizeof(_PATH_DEV) + MAXNAMLEN));
144 ttyname_r(int fd, char *buf, size_t len)
148 if (_FD_LOCK(fd, FD_READ, NULL) == 0) {
149 ret = __ttyname_r_basic(fd, buf, len);
150 _FD_UNLOCK(fd, FD_READ);
157 static char buf[sizeof(_PATH_DEV) + MAXNAMLEN] = _PATH_DEV;
158 static char *oldttyname (int, struct stat *);
173 /* Must be a terminal. */
174 if (tcgetattr(fd, &ttyb) < 0)
176 /* Must be a character device. */
177 if (fstat(fd, &sb) || !S_ISCHR(sb.st_mode))
180 if ( (db = dbopen(_PATH_DEVDB, O_RDONLY, 0, DB_HASH, NULL)) ) {
181 memset(&bkey, 0, sizeof(bkey));
183 bkey.dev = sb.st_rdev;
185 key.size = sizeof(bkey);
186 if (!(db->get)(db, &key, &data, 0)) {
188 buf + sizeof(_PATH_DEV) - 1, data.size);
189 (void)(db->close)(db);
192 (void)(db->close)(db);
194 return (oldttyname(fd, &sb));
206 if ((dp = opendir(_PATH_DEV)) == NULL)
209 while ( (dirp = readdir(dp)) ) {
210 if (dirp->d_fileno != sb->st_ino)
212 bcopy(dirp->d_name, buf + sizeof(_PATH_DEV) - 1,
214 if (stat(buf, &dsb) || sb->st_dev != dsb.st_dev ||
215 sb->st_ino != dsb.st_ino)