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libc: Add symlink(), symlinkat(), and lstat()

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This commit is contained in:
apio 2023-05-20 21:47:20 +02:00
parent 67a9d130e2
commit cb205c851c
Signed by: apio
GPG Key ID: B8A7D06E42258954
4 changed files with 27 additions and 0 deletions
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3
libc/include/sys/stat.h
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@ -29,6 +29,9 @@ extern "C"
#pragma GCC pop_options #pragma GCC pop_options
/* Retrieve information about a file or symbolic link. */
int lstat(const char* path, struct stat* st);
/* Retrieve information about a file. */ /* Retrieve information about a file. */
int fstat(int fd, struct stat* st); int fstat(int fd, struct stat* st);

6
libc/include/unistd.h
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@ -133,6 +133,12 @@ extern "C"
/* Create a pipe for inter-process communication. */ /* Create a pipe for inter-process communication. */
int pipe(int pfds[2]); int pipe(int pfds[2]);
/* Create a symbolic link. */
int symlink(const char* target, const char* linkpath);
/* Create a symbolic link relative to a file descriptor. */
int symlinkat(const char* target, int dirfd, const char* linkpath);
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

6
libc/src/sys/stat.cpp
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@ -30,6 +30,12 @@ extern "C"
__errno_return(rc, int); __errno_return(rc, int);
} }
int lstat(const char* path, struct stat* st)
{
long rc = syscall(SYS_fstatat, AT_FDCWD, path, st, AT_SYMLINK_NOFOLLOW);
__errno_return(rc, int);
}
int fstat(int fd, struct stat* st) int fstat(int fd, struct stat* st)
{ {
long rc = syscall(SYS_fstatat, fd, "", st, AT_EMPTY_PATH); long rc = syscall(SYS_fstatat, fd, "", st, AT_EMPTY_PATH);

12
libc/src/unistd.cpp
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@ -406,4 +406,16 @@ extern "C"
long rc = syscall(SYS_pipe, (int*)pfds); long rc = syscall(SYS_pipe, (int*)pfds);
__errno_return(rc, int); __errno_return(rc, int);
} }
int symlink(const char* target, const char* linkpath)
{
long rc = syscall(SYS_symlinkat, target, AT_FDCWD, linkpath);
__errno_return(rc, int);
}
int symlinkat(const char* target, int dirfd, const char* linkpath)
{
long rc = syscall(SYS_symlinkat, target, dirfd, linkpath);
__errno_return(rc, int);
}
} }