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Kernel+LibC+LibCore: Implement renameat(2)

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Now with the ability to specify different bases for the old and new
paths.
This commit is contained in:
sin-ack 2022-10-01 11:42:25 +00:00 • committed by Andrew Kaster
parent eb5389e933
commit d5fbdf1866
7 changed files with 17 additions and 6 deletions
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8
Userland/Libraries/LibC/stdio.cpp
View file

@ -1125,12 +1125,18 @@ int fclose(FILE* stream)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/rename.html
int rename(char const* oldpath, char const* newpath)
{
return renameat(AT_FDCWD, oldpath, AT_FDCWD, newpath);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/renameat.html
int renameat(int olddirfd, char const* oldpath, int newdirfd, char const* newpath)
{
if (!oldpath || !newpath) {
errno = EFAULT;
return -1;
}
Syscall::SC_rename_params params { { oldpath, strlen(oldpath) }, { newpath, strlen(newpath) } };
Syscall::SC_rename_params params { olddirfd, { oldpath, strlen(oldpath) }, newdirfd, { newpath, strlen(newpath) } };
int rc = syscall(SC_rename, &params);
__RETURN_WITH_ERRNO(rc, rc, -1);
}

1
Userland/Libraries/LibC/stdio.h
View file

@ -96,6 +96,7 @@ int setvbuf(FILE*, char* buf, int mode, size_t);
void setbuf(FILE*, char* buf);
void setlinebuf(FILE*);
int rename(char const* oldpath, char const* newpath);
int renameat(int olddirfd, char const* oldpath, int newdirfd, char const* newpath);
FILE* tmpfile(void);
char* tmpnam(char*);
FILE* popen(char const* command, char const* type);

2
Userland/Libraries/LibCore/System.cpp
View file

@ -920,7 +920,9 @@ ErrorOr<void> rename(StringView old_path, StringView new_path)
#ifdef AK_OS_SERENITY
Syscall::SC_rename_params params {
.olddirfd = AT_FDCWD,
.old_path = { old_path.characters_without_null_termination(), old_path.length() },
.newdirfd = AT_FDCWD,
.new_path = { new_path.characters_without_null_termination(), new_path.length() },
};
int rc = syscall(SC_rename, &params);