fix ptsname_r to conform to the upcoming posix requirements

it should return the error code rather than 0/-1 and setting errno.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/misc/ptsname.c b/src/misc/ptsname.c
index 4f56781d..a3477927 100644
--- a/src/misc/ptsname.c
+++ b/src/misc/ptsname.c
@@ -1,9 +1,15 @@
 #include <stdlib.h>
+#include <errno.h>
 
 int __ptsname_r(int, char *, size_t);
 
 char *ptsname(int fd)
 {
 	static char buf[9 + sizeof(int)*3 + 1];
-	return __ptsname_r(fd, buf, sizeof buf) < 0 ? 0 : buf;
+	int err = __ptsname_r(fd, buf, sizeof buf);
+	if (err) {
+		errno = err;
+		return 0;
+	}
+	return buf;
 }