From 7081e0a34c10eb54ab5f4ca62c5f4f4fa222cbff Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 1 Apr 1999 09:33:06 +0000 Subject: Update. 1999-04-01 Andreas Jaeger * sysdeps/unix/sysv/linux/ttyname.c (ttyname): Terminate the string. * sysdeps/unix/sysv/linux/ttyname_r.c (__ttyname_r): Likewise. --- sysdeps/unix/sysv/linux/ttyname.c | 12 ++++++++++-- sysdeps/unix/sysv/linux/ttyname_r.c | 5 ++++- 2 files changed, 14 insertions(+), 3 deletions(-) (limited to 'sysdeps/unix/sysv') diff --git a/sysdeps/unix/sysv/linux/ttyname.c b/sysdeps/unix/sysv/linux/ttyname.c index 20c794daf4..0dd9c704af 100644 --- a/sysdeps/unix/sysv/linux/ttyname.c +++ b/sysdeps/unix/sysv/linux/ttyname.c @@ -112,6 +112,7 @@ ttyname (fd) int dostat = 0; char *name; int save = errno; + int len; if (!__isatty (fd)) return NULL; @@ -130,10 +131,17 @@ ttyname (fd) } } - if (__readlink (procname, buf, buflen) != -1 + len = __readlink (procname, buf, buflen); + if (len != -1 /* This is for Linux 2.0. */ && buf[0] != '[') - return buf; + { + if (len >= buflen) + return NULL; + /* readlink need not terminate the string. */ + buf[len] = '\0'; + return buf; + } if (__fxstat (_STAT_VER, fd, &st) < 0) return NULL; diff --git a/sysdeps/unix/sysv/linux/ttyname_r.c b/sysdeps/unix/sysv/linux/ttyname_r.c index b92c712fcc..9a0ce4cea9 100644 --- a/sysdeps/unix/sysv/linux/ttyname_r.c +++ b/sysdeps/unix/sysv/linux/ttyname_r.c @@ -134,7 +134,10 @@ __ttyname_r (fd, buf, buflen) ret = __readlink (procname, buf, buflen - 1); if (ret != -1 && buf[0] != '[') - return 0; + { + buf[ret] = '\0'; + return 0; + } if (ret == -1 && errno == ENAMETOOLONG) { __set_errno (ERANGE); -- cgit v1.2.3