int main(int argc, char *argv[])
{
struct sysfs_cxt cxt = UL_SYSFSCXT_EMPTY;
char *devname;
dev_t devno;
char path[PATH_MAX];
int i;
uint64_t u64;
ssize_t len;
if (argc != 2)
errx(EXIT_FAILURE, "usage: %s <devname>", argv[0]);
devname = argv[1];
devno = sysfs_devname_to_devno(devname, NULL);
if (!devno)
err(EXIT_FAILURE, "failed to read devno");
printf("NAME: %s\n", devname);
printf("DEVNO: %u\n", (unsigned int) devno);
printf("DEVNOPATH: %s\n", sysfs_devno_path(devno, path, sizeof(path)));
printf("DEVPATH: %s\n", sysfs_devno_to_devpath(devno, path, sizeof(path)));
printf("PARTITION: %s\n",
sysfs_devno_has_attribute(devno, "partition") ? "YES" : "NOT");
if (sysfs_init(&cxt, devno, NULL))
return EXIT_FAILURE;
len = sysfs_readlink(&cxt, NULL, path, sizeof(path) - 1);
if (len > 0) {
path[len] = '\0';
printf("DEVNOLINK: %s\n", path);
}
printf("SLAVES: %d\n", sysfs_count_dirents(&cxt, "slaves"));
if (sysfs_read_u64(&cxt, "size", &u64))
printf("read SIZE failed\n");
else
printf("SIZE: %jd\n", u64);
if (sysfs_read_int(&cxt, "queue/hw_sector_size", &i))
printf("read SECTOR failed\n");
else
printf("SECTOR: %d\n", i);
printf("DEVNAME: %s\n", sysfs_get_devname(&cxt, path, sizeof(path)));
sysfs_deinit(&cxt);
return EXIT_SUCCESS;
}
char *next_proc_partition(FILE **f)
{
char line[128 + 1];
if (!*f) {
*f = fopen(_PATH_PROC_PARTITIONS, "r");
if (!*f) {
warn(_("cannot open %s"), _PATH_PROC_PARTITIONS);
return NULL;
}
}
while (fgets(line, sizeof(line), *f)) {
char buf[PATH_MAX], *cn;
dev_t devno;
if (sscanf(line, " %*d %*d %*d %128[^\n ]", buf) != 1)
continue;
devno = sysfs_devname_to_devno(buf, NULL);
if (devno <= 0)
continue;
if (sysfs_devno_is_lvm_private(devno) ||
sysfs_devno_is_wholedisk(devno) <= 0)
continue;
if (!sysfs_devno_to_devpath(devno, buf, sizeof(buf)))
continue;
cn = canonicalize_path(buf);
if (!cn)
continue;
if (!is_ide_cdrom_or_tape(cn))
return cn;
}
fclose(*f);
*f = NULL;
return NULL;
}
/**
* blkid_devno_to_devname:
* @devno: device number
*
* This function finds the pathname to a block device with a given
* device number.
*
* Returns: a pointer to allocated memory to the pathname on success,
* and NULL on failure.
*/
char *blkid_devno_to_devname(dev_t devno)
{
char *path = NULL;
char buf[PATH_MAX];
path = sysfs_devno_to_devpath(devno, buf, sizeof(buf));
if (path)
path = strdup(path);
if (!path)
path = scandev_devno_to_devpath(devno);
if (!path) {
DBG(DEVNO, ul_debug("blkid: couldn't find devno 0x%04lx",
(unsigned long) devno));
} else {
DBG(DEVNO, ul_debug("found devno 0x%04llx as %s", (long long)devno, path));
}
return path;
}
