Update.

1998-10-22  H.J. Lu  <hjl@gnu.org>

	* sysdeps/unix/sysv/linux/i386/getgroups.c (__getgroups): Add
	sanity check for n.
	* sysdeps/unix/sysv/linux/i386/setgroups.c (setgroups): Likewise.

	* sysdeps/posix/fpathconf.c (__fpathconf): Set errno to
	EINVAL if errno == ENODEV.  Tested by VSX-PCT.

	* sysdeps/posix/isatty.c (__isatty): Don't reset errno.  Tested
	by VSX-PCT.

	* posix/execvp.c (execvp): Check "".  Tested by VSX-PCT.

ChangeLog

@@ -1,3 +1,17 @@
+1998-10-22  H.J. Lu  <hjl@gnu.org>
+
+	* sysdeps/unix/sysv/linux/i386/getgroups.c (__getgroups): Add
+	sanity check for n.
+	* sysdeps/unix/sysv/linux/i386/setgroups.c (setgroups): Likewise.
+
+	* sysdeps/posix/fpathconf.c (__fpathconf): Set errno to
+	EINVAL if errno == ENODEV.  Tested by VSX-PCT.
+
+	* sysdeps/posix/isatty.c (__isatty): Don't reset errno.  Tested
+	by VSX-PCT.
+
+	* posix/execvp.c (execvp): Check "".  Tested by VSX-PCT.
+
 1998-10-22  Philip Blundell  <pb@nexus.co.uk>
 
 	* sysdeps/unix/arm/sysdep.h: Wrap assembler macros in #ifdef

posix/execvp.c

@@ -67,6 +67,13 @@ execvp (file, argv)
 {
   int got_eacces = 0;
 
+  if (*file == '\0')
+    {
+      /* We check the simple case first. */
+      __set_errno (ENOENT);
+      return -1;
+    }
+
   if (strchr (file, '/') != NULL)
     /* Don't search when it contains a slash.  */
     execute (file, argv);

sysdeps/posix/fpathconf.c

@@ -72,9 +72,12 @@ __fpathconf (fd, name)
 	  {
 	    if (errno == ENOSYS)
 	      {
-		errno = save_errno;
+		__set_errno (save_errno);
 		return NAME_MAX;
 	      }
+	    else if (errno == ENODEV)
+	      __set_errno (EINVAL);
+
 	    return -1;
 	  }
 	else

sysdeps/posix/isatty.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1995, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -16,7 +16,6 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <errno.h>
 #include <unistd.h>
 #include <termios.h>
 
@@ -25,15 +24,9 @@ int
 __isatty (fd)
      int fd;
 {
-  int save;
-  int is_tty;
   struct termios term;
 
-  save = errno;
+  return __tcgetattr (fd, &term) == 0;
-  is_tty = __tcgetattr (fd, &term) == 0;
-  __set_errno (save);
-
-  return is_tty;
 }
 
 weak_alias (__isatty, isatty)

sysdeps/unix/sysv/linux/i386/getgroups.c

@@ -17,10 +17,13 @@
    Boston, MA 02111-1307, USA.  */
 
 #include <errno.h>
-#include <sys/types.h>
 #include <unistd.h>
+#include <sys/param.h>
+#include <sys/types.h>
 
 #include <sysdep.h>
+#include <sys/syscall.h>
+
 #include <linux/posix_types.h>
 
 extern int __syscall_getgroups __P ((int, __kernel_gid_t *));
@@ -32,14 +35,23 @@ __getgroups (n, groups)
      int n;
      gid_t *groups;
 {
+  if (n < 0)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+  else
+    {
       int i, ngids;
-  __kernel_gid_t kernel_groups[n];
+      __kernel_gid_t kernel_groups[n = MIN (n, __sysconf (_SC_NGROUPS_MAX))];
 
       ngids = INLINE_SYSCALL (getgroups, 2, n, kernel_groups);
       if (n != 0 && ngids > 0)
 	for (i = 0; i < ngids; i++)
 	  groups[i] = kernel_groups[i];
+
       return ngids;
+    }
 }
 
 weak_alias (__getgroups, getgroups)

sysdeps/unix/sysv/linux/i386/setgroups.c

@@ -36,6 +36,13 @@ setgroups (n, groups)
      size_t n;
      const gid_t *groups;
 {
+  if (n < 0 || n > __sysconf (_SC_NGROUPS_MAX))
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+  else if
+    {
       size_t i;
       __kernel_gid_t kernel_groups[n];
 
@@ -50,4 +57,5 @@ setgroups (n, groups)
 	}
 
       return INLINE_SYSCALL (setgroups, 2, n, kernel_groups);
+    }
 }