Fix ptsname_r(3) return type to match glibc
The gHardy man pages specify the return type of ptsname_r to be char*, but the
return value to be 0 on success, negative on error and the gHardy stdlib.h
defines extern int ptsname_r(...).
Busybox telnetd fails to run successfully without this change.
diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index acfe694..41e8d26 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -132,7 +132,7 @@
extern int unlockpt(int);
extern char* ptsname(int);
-extern char* ptsname_r(int, char*, size_t);
+extern int ptsname_r(int, char*, size_t);
extern int getpt(void);
static __inline__ int grantpt(int __fd)
diff --git a/libc/unistd/ptsname_r.c b/libc/unistd/ptsname_r.c
index 1ed067b..2fa4c3d 100644
--- a/libc/unistd/ptsname_r.c
+++ b/libc/unistd/ptsname_r.c
@@ -32,7 +32,7 @@
#include <errno.h>
#include <string.h>
-char* ptsname_r( int fd, char* buf, size_t buflen)
+int ptsname_r( int fd, char* buf, size_t buflen)
{
unsigned int pty_num;
char buff[64];
@@ -40,17 +40,19 @@
if (buf == NULL) {
errno = EINVAL;
- return NULL;
+ return -1;
}
- if ( ioctl( fd, TIOCGPTN, &pty_num ) != 0 )
- return NULL;
+ if ( ioctl( fd, TIOCGPTN, &pty_num ) != 0 ) {
+ errno = ENOTTY;
+ return -1;
+ }
len = snprintf( buff, sizeof(buff), "/dev/pts/%u", pty_num );
if (len+1 > (int)buflen) {
errno = ERANGE;
- return NULL;
+ return -1;
}
memcpy( buf, buff, len+1 );
- return buf;
+ return 0;
}