9fd61be19
Denys Vlasenko
2016-09-05
Subject
libbb/xwrite: print errno on "short write" errors
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libbb/xfuncs_printf.c+10 -2
| @@ -235,8 +235,16 @@ void FAST_FUNC xwrite(int fd, const void *buf, size_t count) | |
| { | |
| if (count) { | |
| ssize_t size = full_write(fd, buf, count); | |
| - | if ((size_t)size != count) |
| - | bb_error_msg_and_die("short write"); |
| + | if ((size_t)size != count) { |
| + | /* |
| + | * Two cases: write error immediately; |
| + | * or some writes succeeded, then we hit an error. |
| + | * In either case, errno is set. |
| + | */ |
| + | bb_perror_msg_and_die( |
| + | size >= 0 ? "short write" : "write error" |
| + | ); |
| + | } |
| } | |
| } | |
| void FAST_FUNC xwrite_str(int fd, const char *str) | |