提交 cff4b910 编写于 作者: R Rich Felker

prevent perror from clobbering stderr's orientation

this requirement is specified by POSIX.
上级 cd8d8309
......@@ -9,6 +9,11 @@ void perror(const char *msg)
char *errstr = strerror(errno);
FLOCK(f);
/* Save stderr's orientation and encoding rule, since perror is not
* permitted to change them. */
void *old_locale = f->locale;
int old_mode = f->mode;
if (msg && *msg) {
fwrite(msg, strlen(msg), 1, f);
......@@ -18,5 +23,8 @@ void perror(const char *msg)
fwrite(errstr, strlen(errstr), 1, f);
fputc('\n', f);
f->mode = old_mode;
f->locale = old_locale;
FUNLOCK(f);
}
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