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Kernel: Implement SYS_FSTAT

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Bananymous
2023-06-11 00:54:04 +03:00
parent c423164066
commit aa86125f2b
4 changed files with 42 additions and 11 deletions
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2
libc/include/sys/syscall.h
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@@ -22,7 +22,7 @@ __BEGIN_DECLS
#define SYS_EXEC 15
#define SYS_REALLOC 16
#define SYS_WAIT 17
#define SYS_STAT 18
#define SYS_FSTAT 18
#define SYS_SETENVP 19
#define SYS_READ_DIR_ENTRIES 20

36
libc/sys/stat.cpp
View File

@@ -1,14 +1,46 @@
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>
int fstat(int fildes, struct stat* buf)
{
return syscall(SYS_FSTAT, fildes, buf);
}
int fstatat(int fd, const char* __restrict path, struct stat* __restrict buf, int flag)
{
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
errno = EINVAL;
return -1;
}
int target = openat(fd, path, (flag & AT_SYMLINK_NOFOLLOW) ? O_NOFOLLOW : 0);
if (target == -1)
return -1;
int ret = fstat(target, buf);
close(target);
return ret;
}
int lstat(const char* __restrict path, struct stat* __restrict buf)
{
return syscall(SYS_STAT, path, buf, O_RDONLY | O_NOFOLLOW);
int fd = open(path, O_SEARCH | O_NOFOLLOW);
if (fd == -1)
return -1;
int ret = fstat(fd, buf);
close(fd);
return ret;
}
int stat(const char* __restrict path, struct stat* __restrict buf)
{
return syscall(SYS_STAT, path, buf, O_RDONLY);
int fd = open(path, O_SEARCH);
if (fd == -1)
return -1;
int ret = fstat(fd, buf);
close(fd);
return ret;
}

7
libc/unistd.cpp
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@@ -149,12 +149,11 @@ long syscall(long syscall, ...)
ret = Kernel::syscall(SYS_WAIT, pid, (uintptr_t)stat_loc, options);
break;
}
case SYS_STAT:
case SYS_FSTAT:
{
const char* path = va_arg(args, const char*);
int fd = va_arg(args, int);
struct stat* buf = va_arg(args, struct stat*);
int flags = va_arg(args, int);
ret = Kernel::syscall(SYS_STAT, (uintptr_t)path, (uintptr_t)buf, flags);
ret = Kernel::syscall(SYS_FSTAT, (uintptr_t)fd, (uintptr_t)buf);
break;
}
case SYS_SETENVP: