xref: /aosp_15_r20/external/musl/src/unistd/ttyname.c (revision c9945492fdd68bbe62686c5b452b4dc1be3f8453) 
1*c9945492SAndroid Build Coastguard Worker #include <unistd.h>
2*c9945492SAndroid Build Coastguard Worker #include <errno.h>
3*c9945492SAndroid Build Coastguard Worker #include <limits.h>
4*c9945492SAndroid Build Coastguard Worker 
ttyname(int fd)5*c9945492SAndroid Build Coastguard Worker char *ttyname(int fd)
6*c9945492SAndroid Build Coastguard Worker {
7*c9945492SAndroid Build Coastguard Worker 	static char buf[TTY_NAME_MAX];
8*c9945492SAndroid Build Coastguard Worker 	int result;
9*c9945492SAndroid Build Coastguard Worker 	if ((result = ttyname_r(fd, buf, sizeof buf))) {
10*c9945492SAndroid Build Coastguard Worker 		errno = result;
11*c9945492SAndroid Build Coastguard Worker 		return NULL;
12*c9945492SAndroid Build Coastguard Worker 	}
13*c9945492SAndroid Build Coastguard Worker 	return buf;
14*c9945492SAndroid Build Coastguard Worker }
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