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Windows: Work around an oddity when a pipe with no reader is written to.

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On Windows, write() is implemented using WriteFile(). After the reader
closed its end of the pipe, the first WriteFile() returns
ERROR_BROKEN_PIPE (which translates to EPIPE), subsequent WriteFile()s
return ERROR_NO_DATA, which is translated to EINVAL.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
This commit is contained in:
Johannes Sixt 2007-08-17 18:40:36 +02:00
parent bfdd9ffd2f
commit b2f5e2684d
1 changed files with 6 additions and 1 deletions
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7
write_or_die.c
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@ -34,7 +34,12 @@ void maybe_flush_or_die(FILE *f, const char *desc)
return;
}
if (fflush(f)) {
if (errno == EPIPE)
/*
* On Windows, EPIPE is returned only by the first write()
* after the reading end has closed its handle; subsequent
* write()s return EINVAL.
*/
if (errno == EPIPE || errno == EINVAL)
exit(0);
die("write failure on %s: %s", desc, strerror(errno));
}