static char sccsid[] = "@(#)ttyname.c 8.2 (Berkeley) 1/27/94";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/gen/ttyname.c,v 1.12 2002/02/01 01:32:19 obrien Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/gen/ttyname.c,v 1.16 2004/01/06 18:26:14 nectar Exp $");
#include "namespace.h"
#include <sys/types.h>
#include <string.h>
#include <paths.h>
#include <pthread.h>
+#include <errno.h>
#include "un-namespace.h"
-#include <db.h>
#include "libc_private.h"
-static char buf[sizeof(_PATH_DEV) + MAXNAMLEN] = _PATH_DEV;
-static char *oldttyname(int, struct stat *);
+#ifndef BUILDING_VARIANT
+static pthread_once_t ttyname_buf_control = PTHREAD_ONCE_INIT;
+static char *buf = NULL;
static char *ttyname_threaded(int fd);
static char *ttyname_unthreaded(int fd);
ret = ttyname_threaded(fd);
return (ret);
}
+#endif /* !BUILDING_VARIANT */
+#if __DARWIN_UNIX03
+int
+#else /* !__DARWIN_UNIX03 */
char *
-ttyname_r(int fd, char *buf, size_t len)
+#endif /* __DARWIN_UNIX03 */
+ttyname_r(int fd, char *thrbuf, size_t len)
{
- struct dirent *dirp;
- DIR *dp;
- struct stat dsb;
struct stat sb;
- char *rval;
- int minlen;
-
- rval = NULL;
+#if __DARWIN_UNIX03
+ if (_fstat(fd, &sb) < 0)
+ return (EBADF);
/* Must be a terminal. */
if (!isatty(fd))
- return (rval);
+ return (ENOTTY);
/* Must be a character device. */
- if (_fstat(fd, &sb) || !S_ISCHR(sb.st_mode))
- return (rval);
+ if (!S_ISCHR(sb.st_mode))
+ return (ENOTTY);
/* Must have enough room */
if (len <= sizeof(_PATH_DEV))
- return (rval);
-
- if ((dp = opendir(_PATH_DEV)) != NULL) {
- memcpy(buf, _PATH_DEV, sizeof(_PATH_DEV));
- for (rval = NULL; (dirp = readdir(dp)) != NULL;) {
- if (dirp->d_fileno != sb.st_ino)
- continue;
- minlen = (len - (sizeof(_PATH_DEV) - 1)) < (dirp->d_namlen + 1) ?
- (len - (sizeof(_PATH_DEV) - 1)) : (dirp->d_namlen + 1);
- memcpy(buf + sizeof(_PATH_DEV) - 1, dirp->d_name, minlen);
- if (stat(buf, &dsb) || sb.st_dev != dsb.st_dev ||
- sb.st_ino != dsb.st_ino)
- continue;
- rval = buf;
- break;
- }
- (void) closedir(dp);
+ return (ERANGE);
+#else /* !__DARWIN_UNIX03 */
+ /* Must be a terminal. */
+ if (!isatty(fd))
+ return (NULL);
+ /* Must be a character device. */
+ if (_fstat(fd, &sb))
+ return (NULL);
+ if (!S_ISCHR(sb.st_mode)) {
+ errno = ENOTTY;
+ return (NULL);
+ }
+ /* Must have enough room */
+ if (len <= sizeof(_PATH_DEV)) {
+ errno = ERANGE;
+ return (NULL);
+ }
+#endif /* __DARWIN_UNIX03 */
+
+ strlcpy(thrbuf, _PATH_DEV, len);
+ if (devname_r(sb.st_rdev, S_IFCHR,
+ thrbuf + strlen(thrbuf), len - strlen(thrbuf)) == NULL)
+#if __DARWIN_UNIX03
+ return (ERANGE);
+ return (0);
+#else /* !__DARWIN_UNIX03 */
+ {
+ errno = ERANGE;
+ return (NULL);
}
- return (rval);
+ return (thrbuf);
+#endif /* __DARWIN_UNIX03 */
}
+#ifndef BUILDING_VARIANT
static char *
ttyname_threaded(int fd)
{
if (ttyname_init == 0) {
_pthread_mutex_lock(&ttyname_lock);
if (ttyname_init == 0) {
- if (_pthread_key_create(&ttyname_key, free)) {
+ /* __PTK_LIBC_TTYNAME_KEY */
+ ttyname_key = __LIBC_PTHREAD_KEY_TTYNAME;
+ if (pthread_key_init_np(ttyname_key, free)) {
+ int save = errno;
_pthread_mutex_unlock(&ttyname_lock);
+ errno = save;
return (NULL);
}
ttyname_init = 1;
if ((buf = _pthread_getspecific(ttyname_key)) == NULL) {
if ((buf = malloc(sizeof(_PATH_DEV) + MAXNAMLEN)) != NULL) {
if (_pthread_setspecific(ttyname_key, buf) != 0) {
+ int save = errno;
free(buf);
+ errno = save;
return (NULL);
}
} else {
return (NULL);
}
}
+#if __DARWIN_UNIX03
+ return (ttyname_r(fd, buf, sizeof(_PATH_DEV) + MAXNAMLEN) == 0 ? buf : NULL);
+#else /* !__DARWIN_UNIX03 */
return (ttyname_r(fd, buf, sizeof(_PATH_DEV) + MAXNAMLEN));
+#endif /* __DARWIN_UNIX03 */
+}
+
+static void
+ttyname_buf_allocate(void)
+{
+ buf = malloc(sizeof(_PATH_DEV) + MAXNAMLEN);
}
static char *
{
struct stat sb;
struct termios ttyb;
- DB *db;
- DBT data, key;
- struct {
- mode_t type;
- dev_t dev;
- } bkey;
/* Must be a terminal. */
if (tcgetattr(fd, &ttyb) < 0)
return (NULL);
/* Must be a character device. */
- if (_fstat(fd, &sb) || !S_ISCHR(sb.st_mode))
+ if (_fstat(fd, &sb))
+ return (NULL);
+ if (!S_ISCHR(sb.st_mode)) {
+ errno = ENOTTY;
return (NULL);
-
- if ( (db = dbopen(_PATH_DEVDB, O_RDONLY, 0, DB_HASH, NULL)) ) {
- memset(&bkey, 0, sizeof(bkey));
- bkey.type = S_IFCHR;
- bkey.dev = sb.st_rdev;
- key.data = &bkey;
- key.size = sizeof(bkey);
- if (!(db->get)(db, &key, &data, 0)) {
- bcopy(data.data,
- buf + sizeof(_PATH_DEV) - 1, data.size);
- (void)(db->close)(db);
- return (buf);
- }
- (void)(db->close)(db);
}
- return (oldttyname(fd, &sb));
-}
-
-static char *
-oldttyname(int fd, struct stat *sb)
-{
- struct dirent *dirp;
- struct stat dsb;
- DIR *dp;
- if ((dp = opendir(_PATH_DEV)) == NULL)
+ if (pthread_once(&ttyname_buf_control, ttyname_buf_allocate)
+ || !buf) {
+ errno = ENOMEM;
return (NULL);
+ }
- while ( (dirp = readdir(dp)) ) {
- if (dirp->d_fileno != sb->st_ino)
- continue;
- bcopy(dirp->d_name, buf + sizeof(_PATH_DEV) - 1,
- dirp->d_namlen + 1);
- if (stat(buf, &dsb) || sb->st_dev != dsb.st_dev ||
- sb->st_ino != dsb.st_ino)
- continue;
- (void)closedir(dp);
- return (buf);
+ strlcpy(buf, _PATH_DEV, sizeof(_PATH_DEV) + MAXNAMLEN);
+ if (devname_r(sb.st_rdev, S_IFCHR,
+ buf + strlen(buf), sizeof(_PATH_DEV) + MAXNAMLEN - strlen(buf)) == NULL) {
+ errno = ERANGE;
+ return (NULL);
}
- (void)closedir(dp);
- return (NULL);
+ return (buf);
}
+#endif /* !BUILDING_VARIANT */
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