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LibC+Everywhere: Remove open_with_path_length() in favor of open()

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This API was a mostly gratuitous deviation from POSIX that gave up some
portability in exchange for avoiding the occasional strlen().

I don't think that was actually achieving anything valuable, so let's
just chill out and have the same open() API as everyone else. :^)
This commit is contained in:
Andreas Kling 2021-01-12 19:21:59 +01:00
parent d551263b11
commit 1a08ac72ad
21 changed files with 51 additions and 69 deletions
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43
Userland/Libraries/LibC/fcntl.cpp
View file

@ -53,42 +53,24 @@ int creat(const char* path, mode_t mode)
return open(path, O_CREAT | O_WRONLY | O_TRUNC, mode);
}
int creat_with_path_length(const char* path, size_t path_length, mode_t mode)
{
return open_with_path_length(path, path_length, O_CREAT | O_WRONLY | O_TRUNC, mode);
}
int open_with_path_length(const char* path, size_t path_length, int options, mode_t mode)
{
return openat_with_path_length(AT_FDCWD, path, path_length, options, mode);
}
int openat_with_path_length(int dirfd, const char* path, size_t path_length, int options, mode_t mode)
{
if (!path) {
errno = EFAULT;
return -1;
}
if (path_length > INT32_MAX) {
errno = EINVAL;
return -1;
}
Syscall::SC_open_params params { dirfd, { path, path_length }, options, mode };
int rc = syscall(SC_open, &params);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int open(const char* path, int options, ...)
{
if (!path) {
errno = EFAULT;
return -1;
}
auto path_length = strlen(path);
if (path_length > INT32_MAX) {
errno = EINVAL;
return -1;
}
va_list ap;
va_start(ap, options);
auto mode = (mode_t)va_arg(ap, unsigned);
va_end(ap);
return open_with_path_length(path, strlen(path), options, mode);
Syscall::SC_open_params params { AT_FDCWD, { path, path_length }, options, mode };
int rc = syscall(SC_open, &params);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int openat(int dirfd, const char* path, int options, ...)
@ -97,10 +79,17 @@ int openat(int dirfd, const char* path, int options, ...)
errno = EFAULT;
return -1;
}
auto path_length = strlen(path);
if (path_length > INT32_MAX) {
errno = EINVAL;
return -1;
}
va_list ap;
va_start(ap, options);
auto mode = (mode_t)va_arg(ap, unsigned);
va_end(ap);
return openat_with_path_length(dirfd, path, strlen(path), options, mode);
Syscall::SC_open_params params { dirfd, { path, path_length }, options, mode };
int rc = syscall(SC_open, &params);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
}

3
Userland/Libraries/LibC/fcntl.h
View file

@ -85,11 +85,8 @@ __BEGIN_DECLS
int creat(const char* path, mode_t);
int open(const char* path, int options, ...);
int creat_with_path_length(const char* path, size_t path_length, mode_t);
int open_with_path_length(const char* path, size_t path_length, int options, mode_t);
#define AT_FDCWD -100
int openat(int dirfd, const char* path, int options, ...);
int openat_with_path_length(int dirfd, const char* path, size_t path_length, int options, mode_t);
int fcntl(int fd, int cmd, ...);
int watch_file(const char* path, size_t path_length);