diff options
Diffstat (limited to 'src/mman')
-rw-r--r-- | src/mman/shm_open.c | 21 | ||||
-rw-r--r-- | src/mman/shm_unlink.c | 21 |
2 files changed, 42 insertions, 0 deletions
diff --git a/src/mman/shm_open.c b/src/mman/shm_open.c new file mode 100644 index 00000000..d368622d --- /dev/null +++ b/src/mman/shm_open.c @@ -0,0 +1,21 @@ +#include <sys/mman.h> +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> + +int shm_open(const char *name, int flag, mode_t mode) +{ + int fd, dir; + + while (*name == '/') name++; + if (strchr(name, '/')) { + errno = EINVAL; + return -1; + } + + if ((dir = open("/dev/shm", O_DIRECTORY|O_RDONLY)) < 0) return -1; + fd = openat(dir, name, flag|O_NOFOLLOW|O_CLOEXEC|O_NONBLOCK, mode); + close(dir); + return fd; +} diff --git a/src/mman/shm_unlink.c b/src/mman/shm_unlink.c new file mode 100644 index 00000000..46e60b3b --- /dev/null +++ b/src/mman/shm_unlink.c @@ -0,0 +1,21 @@ +#include <sys/mman.h> +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> + +int shm_unlink(const char *name) +{ + int dir, ret; + + while (*name == '/') name++; + if (strchr(name, '/')) { + errno = EINVAL; + return -1; + } + + if ((dir = open("/dev/shm", O_DIRECTORY|O_RDONLY)) < 0) return -1; + ret = unlinkat(dir, name, 0); + close(dir); + return ret; +} |