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Kernel: Pass a parameter struct to chown()

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This commit is contained in:
Andreas Kling 2020-01-11 10:17:08 +01:00
parent 29b3d95004
commit 6536a80aa9
Notes: sideshowbarker 2024-07-19 10:12:40 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/6536a80aa9f
4 changed files with 21 additions and 6 deletions
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12
Kernel/Process.cpp
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@ -2640,12 +2640,16 @@ int Process::sys$fchown(int fd, uid_t uid, gid_t gid)
return description->chown(uid, gid);
}
int Process::sys$chown(const char* pathname, uid_t uid, gid_t gid)
int Process::sys$chown(const Syscall::SC_chown_params* user_params)
{
SmapDisabler disabler;
if (!validate_read_str(pathname))
if (!validate_read_typed(user_params))
return -EFAULT;
return VFS::the().chown(StringView(pathname), uid, gid, current_directory());
Syscall::SC_chown_params params;
copy_from_user(&params, user_params, sizeof(params));
auto path = get_syscall_path_argument(params.path.characters, params.path.length);
if (path.is_error())
return path.error();
return VFS::the().chown(path.value(), params.uid, params.gid, current_directory());
}
void Process::finalize()

2
Kernel/Process.h
View file

@ -183,7 +183,7 @@ public:
int sys$umount(const char* mountpoint, size_t mountpoint_length);
int sys$chmod(const char* pathname, size_t path_length, mode_t);
int sys$fchmod(int fd, mode_t);
int sys$chown(const char* pathname, uid_t, gid_t);
int sys$chown(const Syscall::SC_chown_params*);
int sys$fchown(int fd, uid_t, gid_t);
int sys$socket(int domain, int type, int protocol);
int sys$bind(int sockfd, const sockaddr* addr, socklen_t);

6
Kernel/Syscall.h
View file

@ -333,6 +333,12 @@ struct SC_link_params {
StringArgument new_path;
};
struct SC_chown_params {
StringArgument path;
u32 uid;
u32 gid;
};
void initialize();
int sync();

7
Libraries/LibC/unistd.cpp
View file

@ -27,7 +27,12 @@ int systrace(pid_t pid)
int chown(const char* pathname, uid_t uid, gid_t gid)
{
int rc = syscall(SC_chown, pathname, uid, gid);
if (!pathname) {
errno = EFAULT;
return -1;
}
Syscall::SC_chown_params params { { pathname, strlen(pathname) }, uid, gid };
int rc = syscall(SC_chown, &params);
__RETURN_WITH_ERRNO(rc, rc, -1);
}