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isosize: fix read() result check

This commit is contained in:
Karel Zak 2016-10-04 20:15:09 +02:00
parent 9e13b1c1c7
commit 17dd04c92a
1 changed files with 1 additions and 1 deletions
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2
disk-utils/isosize.c
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@ -138,7 +138,7 @@ static void isosize(int argc, char *filenamep, int xflag, long divisor)
if (lseek(fd, 16 << 11, 0) == (off_t) - 1)
err(EXIT_FAILURE, _("seek error on %s"), filenamep);
if (read(fd, &ipd, sizeof(ipd)) != (ssize_t) sizeof(ipd))
if (read(fd, &ipd, sizeof(ipd)) <= 0)
err(EXIT_FAILURE, _("read error on %s"), filenamep);
nsecs = isonum_733(ipd.volume_space_size, xflag);