xref: /aosp_15_r20/external/musl/src/stdio/fileno.c (revision c9945492fdd68bbe62686c5b452b4dc1be3f8453) 
1*c9945492SAndroid Build Coastguard Worker #include "stdio_impl.h"
2*c9945492SAndroid Build Coastguard Worker #include <errno.h>
3*c9945492SAndroid Build Coastguard Worker 
fileno(FILE * f)4*c9945492SAndroid Build Coastguard Worker int fileno(FILE *f)
5*c9945492SAndroid Build Coastguard Worker {
6*c9945492SAndroid Build Coastguard Worker 	FLOCK(f);
7*c9945492SAndroid Build Coastguard Worker 	int fd = f->fd;
8*c9945492SAndroid Build Coastguard Worker 	FUNLOCK(f);
9*c9945492SAndroid Build Coastguard Worker 	if (fd < 0) {
10*c9945492SAndroid Build Coastguard Worker 		errno = EBADF;
11*c9945492SAndroid Build Coastguard Worker 		return -1;
12*c9945492SAndroid Build Coastguard Worker 	}
13*c9945492SAndroid Build Coastguard Worker 	return fd;
14*c9945492SAndroid Build Coastguard Worker }
15*c9945492SAndroid Build Coastguard Worker 
16*c9945492SAndroid Build Coastguard Worker weak_alias(fileno, fileno_unlocked);
17