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fdopen should set errno when it fails due to invalid mode string

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This commit is contained in:
Rich Felker 2012-06-17 20:34:04 -04:00
commit 3b43d10faf
1 changed files with 4 additions and 1 deletions
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5
src/stdio/__fdopen.c
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@ -7,7 +7,10 @@ FILE *__fdopen(int fd, const char *mode)
int plus = !!strchr(mode, '+');
/* Check for valid initial mode character */
if (!strchr("rwa", *mode)) return 0;
if (!strchr("rwa", *mode)) {
errno = EINVAL;
return 0;
}
/* Allocate FILE+buffer or fail */
if (!(f=malloc(sizeof *f + UNGET + BUFSIZ))) return 0;