From fddfebbd1064dec313891ad91dd9ca6e92e622ec Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sat, 17 May 2003 20:53:32 +0000 Subject: Update. 2003-05-17 Ulrich Drepper * sem_open.c: Fix one endless loop. Implement correct semantics wrt opening the same semaphore more then once. * sem_close.c: Adjust for sem_open change. * semaphoreP.h: Include . Define struct inuse_sem. Declare __sem_mappings, __sem_mappings_lock, __sem_search. * Makefile (tests): Add tst-sem7. * tst-sem7.c: New file. --- nptl/tst-sem7.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 nptl/tst-sem7.c (limited to 'nptl/tst-sem7.c') diff --git a/nptl/tst-sem7.c b/nptl/tst-sem7.c new file mode 100644 index 0000000000..a85c73e715 --- /dev/null +++ b/nptl/tst-sem7.c @@ -0,0 +1,109 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 2003. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#include +#include +#include + + +static void +remove_sem (int status, void *arg) +{ + sem_unlink (arg); +} + + +int +main (void) +{ + sem_t *s; + sem_t *s2; + sem_t *s3; + + s = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1); + if (s == SEM_FAILED) + { + if (errno == ENOSYS) + { + puts ("sem_open not supported. Oh well."); + return 0; + } + + /* Maybe the shm filesystem has strict permissions. */ + if (errno == EACCES) + { + puts ("sem_open not allowed. Oh well."); + return 0; + } + + printf ("sem_open: %m\n"); + return 1; + } + + on_exit (remove_sem, (void *) "/glibc-tst-sem7"); + + /* We have the semaphore object. Now try again. We should get the + same address. */ + s2 = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1); + if (s2 == SEM_FAILED) + { + puts ("2nd sem_open failed"); + return 1; + } + if (s != s2) + { + puts ("2nd sem_open didn't return the same address"); + return 1; + } + + /* And again, this time without O_CREAT. */ + s3 = sem_open ("/glibc-tst-sem7", 0); + if (s3 == SEM_FAILED) + { + puts ("3rd sem_open failed"); + return 1; + } + if (s != s3) + { + puts ("3rd sem_open didn't return the same address"); + return 1; + } + + /* Now close the handle. Three times. */ + if (sem_close (s2) != 0) + { + puts ("1st sem_close failed"); + return 1; + } + if (sem_close (s) != 0) + { + puts ("2nd sem_close failed"); + return 1; + } + if (sem_close (s3) != 0) + { + puts ("3rd sem_close failed"); + return 1; + } + + return 0; +} -- cgit v1.2.3