libblkid: don't require udev symlinks verification for non-root users
There is noway how to verify LABEL/UUID for non-root users, we have to follow udev symlinks or use cached information from blkid.tab. Use unverified symlinks is faster. Signed-off-by: Karel Zak <kzak@redhat.com>
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@ -42,6 +42,7 @@ static int verify_tag(const char *devname, const char *name, const char *value)
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int fd = -1, rc = -1;
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size_t len;
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const char *data;
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int errsv = 0;
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pr = blkid_new_probe();
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if (!pr)
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@ -50,8 +51,10 @@ static int verify_tag(const char *devname, const char *name, const char *value)
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blkid_probe_set_request(pr, BLKID_PROBREQ_LABEL | BLKID_PROBREQ_UUID);
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fd = open(devname, O_RDONLY);
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if (fd < 0)
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if (fd < 0) {
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errsv = errno;
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goto done;
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}
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if (blkid_probe_set_device(pr, fd, 0, 0))
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goto done;
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rc = blkid_do_safeprobe(pr);
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@ -66,7 +69,9 @@ done:
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if (fd >= 0)
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close(fd);
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blkid_free_probe(pr);
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return rc;
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/* for non-root users we use unverified udev links */
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return errsv == EACCES ? 0 : rc;
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}
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/**
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