diff options
Diffstat (limited to 'lib/libc/gen/devname.c')
-rw-r--r-- | lib/libc/gen/devname.c | 57 |
1 files changed, 11 insertions, 46 deletions
diff --git a/lib/libc/gen/devname.c b/lib/libc/gen/devname.c index bd9ac41..ca0d6a9 100644 --- a/lib/libc/gen/devname.c +++ b/lib/libc/gen/devname.c @@ -40,65 +40,22 @@ __FBSDID("$FreeBSD$"); #include <sys/types.h> #include <sys/sysctl.h> -#include <db.h> #include <err.h> #include <fcntl.h> -#include <paths.h> #include <stdio.h> #include <string.h> #include <sys/param.h> #include <sys/stat.h> -static char * -xdevname(dev, type) - dev_t dev; - mode_t type; -{ - struct { - mode_t type; - dev_t dev; - } bkey; - static DB *db; - static int failure; - DBT data, key; - - if (!db && !failure && - !(db = dbopen(_PATH_DEVDB, O_RDONLY, 0, DB_HASH, NULL))) - failure = 1; - if (failure) - return (NULL); - - /* - * Keys are a mode_t followed by a dev_t. The former is the type of - * the file (mode & S_IFMT), the latter is the st_rdev field. Be - * sure to clear any padding that may be found in bkey. - */ - memset(&bkey, 0, sizeof(bkey)); - bkey.dev = dev; - bkey.type = type; - key.data = &bkey; - key.size = sizeof(bkey); - return ((db->get)(db, &key, &data, 0) ? NULL : (char *)data.data); -} - char * -devname(dev, type) - dev_t dev; - mode_t type; +devname_r(dev_t dev, mode_t type, char *buf, int len) { - static char buf[SPECNAMELEN + 1]; int i; size_t j; char *r; - /* First check the DB file. */ - r = xdevname(dev, type); - if (r != NULL) - return (r); - - /* Then ask the kernel. */ if ((type & S_IFMT) == S_IFCHR) { - j = sizeof(buf); + j = len; i = sysctlbyname("kern.devname", buf, &j, &dev, sizeof (dev)); if (i == 0) return (buf); @@ -109,7 +66,15 @@ devname(dev, type) r = "#NODEV"; else r = "#%c:%d:0x%x"; - snprintf(buf, SPECNAMELEN + 1, r, + snprintf(buf, len, r, (type & S_IFMT) == S_IFCHR ? 'C' : 'B', major(dev), minor(dev)); return (buf); } + +char * +devname(dev_t dev, mode_t type) +{ + static char buf[SPECNAMELEN + 1]; + + return(devname_r(dev, type, buf, sizeof(buf))); +} |