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use lighter internal stdio lock in getopt error printing

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the public flockfile interface is significantly heavier because it has
to handle the possibility of caller returning or thread exiting while
holding the lock.
This commit is contained in:
Rich Felker 2018-09-10 23:04:42 -04:00
parent 7ab1578d05
commit cf7db2427f
1 changed files with 3 additions and 2 deletions
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5
src/misc/getopt.c
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@ -5,6 +5,7 @@
#include <stdlib.h>
#include "libc.h"
#include "locale_impl.h"
#include "stdio_impl.h"
char *optarg;
int optind=1, opterr=1, optopt, __optpos, __optreset=0;
@ -16,12 +17,12 @@ void __getopt_msg(const char *a, const char *b, const char *c, size_t l)
{
FILE *f = stderr;
b = __lctrans_cur(b);
flockfile(f);
FLOCK(f);
fputs(a, f)>=0
&& fwrite(b, strlen(b), 1, f)
&& fwrite(c, 1, l, f)==l
&& putc('\n', f);
funlockfile(f);
FUNLOCK(f);
}
int getopt(int argc, char * const argv[], const char *optstring)