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Fix errno handling in posix_openpt.

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The implementation of posix_openpt on Linux can fail in a few extra
ways if the appropriate pseudo filesystems are not mounted etc.  In
some of these cases we have to explicitly set errno.
This commit is contained in:
Andreas Schwab
2009-10-29 11:27:53 -07:00
committed by Ulrich Drepper
parent 22bc5239e1
commit d79eccd6dd
2 changed files with 10 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2009-10-27 Andreas Schwab <schwab@redhat.com>
* sysdeps/unix/sysv/linux/getpt.c (__posix_openpt): Make sure
errno is always set when returning unsuccessfully.
2009-10-29 Andreas Schwab <schwab@redhat.com> 2009-10-29 Andreas Schwab <schwab@redhat.com>
* malloc/memusage.c (update_data): Fix index wraparound handling * malloc/memusage.c (update_data): Fix index wraparound handling

7
sysdeps/unix/sysv/linux/getpt.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc. /* Copyright (C) 1998, 1999, 2001, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998. Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
@ -64,9 +64,10 @@ __posix_openpt (oflag)
} }
/* If /dev/pts is not mounted then the UNIX98 pseudo terminals /* If /dev/pts is not mounted then the UNIX98 pseudo terminals
are not usable. */ are not usable. */
__close (fd); __close (fd);
have_no_dev_ptmx = 1; have_no_dev_ptmx = 1;
__set_errno (ENOENT);
} }
else else
{ {
@ -76,6 +77,8 @@ __posix_openpt (oflag)
return -1; return -1;
} }
} }
else
__set_errno (ENOENT);
return -1; return -1;
} }