diff options
| -rw-r--r-- | rt/shm_open.c | 34 | ||||
| -rw-r--r-- | sysdeps/posix/shm_open.c | 62 |
2 files changed, 29 insertions, 67 deletions
diff --git a/rt/shm_open.c b/rt/shm_open.c index e2bd25978a..a89aac4102 100644 --- a/rt/shm_open.c +++ b/rt/shm_open.c @@ -1,4 +1,5 @@ -/* Copyright (C) 2000-2021 Free Software Foundation, Inc. +/* shm_open -- open a POSIX shared memory object. Generic POSIX file version. + Copyright (C) 2001-2021 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 @@ -16,13 +17,36 @@ <https://www.gnu.org/licenses/>. */ #include <errno.h> -#include <sys/mman.h> +#include <fcntl.h> +#include <pthread.h> +#include <shm-directory.h> +#include <unistd.h> /* Open shared memory object. */ int shm_open (const char *name, int oflag, mode_t mode) { - __set_errno (ENOSYS); - return -1; + struct shmdir_name dirname; + if (__shm_get_name (&dirname, name, false) != 0) + { + __set_errno (EINVAL); + return -1; + } + + oflag |= O_NOFOLLOW | O_CLOEXEC; + + /* Disable asynchronous cancellation. */ + int state; + pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &state); + + int fd = open (dirname.name, oflag, mode); + if (fd == -1 && __glibc_unlikely (errno == EISDIR)) + /* It might be better to fold this error with EINVAL since + directory names are just another example for unsuitable shared + object names and the standard does not mention EISDIR. */ + __set_errno (EINVAL); + + pthread_setcancelstate (state, NULL); + + return fd; } -stub_warning (shm_open) diff --git a/sysdeps/posix/shm_open.c b/sysdeps/posix/shm_open.c deleted file mode 100644 index 1817c52f7f..0000000000 --- a/sysdeps/posix/shm_open.c +++ /dev/null @@ -1,62 +0,0 @@ -/* shm_open -- open a POSIX shared memory object. Generic POSIX file version. - Copyright (C) 2001-2021 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 - 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, see - <https://www.gnu.org/licenses/>. */ - -#include <unistd.h> - -#if ! _POSIX_MAPPED_FILES - -# include <rt/shm_open.c> - -#else - -# include <errno.h> -# include <fcntl.h> -# include <pthread.h> -# include <shm-directory.h> - - -/* Open shared memory object. */ -int -shm_open (const char *name, int oflag, mode_t mode) -{ - struct shmdir_name dirname; - if (__shm_get_name (&dirname, name, false) != 0) - { - __set_errno (EINVAL); - return -1; - } - - oflag |= O_NOFOLLOW | O_CLOEXEC; - - /* Disable asynchronous cancellation. */ - int state; - pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &state); - - int fd = open (dirname.name, oflag, mode); - if (fd == -1 && __glibc_unlikely (errno == EISDIR)) - /* It might be better to fold this error with EINVAL since - directory names are just another example for unsuitable shared - object names and the standard does not mention EISDIR. */ - __set_errno (EINVAL); - - pthread_setcancelstate (state, NULL); - - return fd; -} - -#endif /* _POSIX_MAPPED_FILES */ |