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dd: exit with 1 if last write was incomplete

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$ busybox dd if=/dev/zero of=/dev/loop0 bs=100M count=8; echo $?
8+0 records in
7+1 records out
805220352 bytes (767.9MB) copied, 0.464010 seconds, 1.6GB/s
1  <=========== FIXED

function                                             old     new   delta
write_and_stats                                       96      97      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-01-10 10:58:55 +01:00
parent d1df1a709f
commit 5afd63a631
1 changed files with 7 additions and 5 deletions
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10
coreutils/dd.c
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@ -195,15 +195,17 @@ static bool write_and_stats(const void *buf, size_t len, size_t obs,
ssize_t n = full_write_or_warn(buf, len, filename); ssize_t n = full_write_or_warn(buf, len, filename);
if (n < 0) if (n < 0)
return 1; return 1;
if ((size_t)n == obs)
G.out_full++;
else if (n) /* > 0 */
G.out_part++;
#if ENABLE_FEATURE_DD_THIRD_STATUS_LINE #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
G.total_bytes += n; G.total_bytes += n;
#endif #endif
if ((size_t)n == obs) {
G.out_full++;
return 0; return 0;
} }
if (n) /* > 0 */
G.out_part++;
return 1;
}
#if ENABLE_LFS #if ENABLE_LFS
# define XATOU_SFX xatoull_sfx # define XATOU_SFX xatoull_sfx