rework langinfo code for ABI compat and for use by time code

[musl] / src / misc / pty.c

diff --git a/src/misc/pty.c b/src/misc/pty.c
index 0d25a83..9e201ef 100644 (file)
--- a/src/misc/pty.c
+++ b/src/misc/pty.c
@@ -2,6 +2,9 @@
 #include <sys/ioctl.h>
 #include <stdio.h>
 #include <fcntl.h>
+#include <errno.h>
+#include "libc.h"
+#include "syscall.h"
 
 int posix_openpt(int flags)
 {
@@ -19,17 +22,13 @@ int unlockpt(int fd)
        return ioctl(fd, TIOCSPTLCK, &unlock);
 }
 
-char *ptsname(int fd)
+int __ptsname_r(int fd, char *buf, size_t len)
 {
-       static char buf[9 + sizeof(int)*3 + 1];
-       char *s = buf+sizeof(buf)-1;
-       int pty;
-       if (ioctl (fd, TIOCGPTN, &pty))
-               return NULL;
-       if (pty) for (; pty; pty/=10) *--s = '0' + pty%10;
-       else *--s = '0';
-       s -= 9;
-        s[0] = '/'; s[1] = 'd'; s[2] = 'e'; s[3] = 'v';
-       s[4] = '/'; s[5] = 'p'; s[6] = 't'; s[7] = 's'; s[8] = '/';
-       return s;
+       int pty, err;
+       if (!buf) len = 0;
+       if ((err = __syscall(SYS_ioctl, fd, TIOCGPTN, &pty))) return err;
+       if (snprintf(buf, len, "/dev/pts/%d", pty) >= len) return ERANGE;
+       return 0;
 }
+
+weak_alias(__ptsname_r, ptsname_r);