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drop direct use of stat syscalls in internal __map_file

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this function is used to implement some baseline ISO C interfaces, so
it cannot call any of the stat functions by their public names. use
the namespace-safe __fstatat instead.
This commit is contained in:
Rich Felker 2022-04-28 02:18:42 -04:00
parent c9ba0769a7
commit 2b754a5424
1 changed files with 3 additions and 3 deletions
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6
src/time/__map_file.c
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@ -1,16 +1,16 @@
#define _BSD_SOURCE
#include <sys/mman.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "syscall.h"
#include "kstat.h"
const char unsigned *__map_file(const char *pathname, size_t *size)
{
struct kstat st;
struct stat st;
const unsigned char *map = MAP_FAILED;
int fd = sys_open(pathname, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
if (fd < 0) return 0;
if (!syscall(SYS_fstat, fd, &st)) {
if (!__fstatat(fd, "", &st, AT_EMPTY_PATH)) {
map = __mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
*size = st.st_size;
}