diff options
Diffstat (limited to 'sysdeps/posix/preadv_common.c')
| -rw-r--r-- | sysdeps/posix/preadv_common.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sysdeps/posix/preadv_common.c b/sysdeps/posix/preadv_common.c index 37efdc0ec0..76cf261a5c 100644 --- a/sysdeps/posix/preadv_common.c +++ b/sysdeps/posix/preadv_common.c @@ -24,6 +24,7 @@ #include <malloc.h> #include <ldsodefs.h> +#include <libc-pointer-arith.h> /* Read data from file descriptor FD at the given position OFFSET without change the file pointer, and put the result in the buffers @@ -54,8 +55,9 @@ PREADV (int fd, const struct iovec *vector, int count, OFF_T offset) but 1. it is system specific (not meant in generic implementation), and 2. it would make the implementation more complex, and 3. it will require another syscall (fcntl). */ - void *buffer = NULL; - if (__posix_memalign (&buffer, GLRO(dl_pagesize), bytes) != 0) + void *buffer = __mmap (NULL, bytes, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (__glibc_unlikely (buffer == MAP_FAILED)) return -1; ssize_t bytes_read = PREAD (fd, buffer, bytes, offset); @@ -78,6 +80,6 @@ PREADV (int fd, const struct iovec *vector, int count, OFF_T offset) } end: - free (buffer); + __munmap (buffer, bytes); return bytes_read; } |