1087 lines
29 KiB
C++
1087 lines
29 KiB
C++
/*
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* Copyright (c) 2011-2017, 2021 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* io.cpp
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* Provides system calls for input and output.
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*/
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <errno.h>
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#include <fsmarshall-msg.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <sortix/dirent.h>
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#include <sortix/fcntl.h>
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#include <sortix/ioctl.h>
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#include <sortix/seek.h>
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#include <sortix/socket.h>
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#include <sortix/stat.h>
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#include <sortix/statvfs.h>
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#include <sortix/uio.h>
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#include <sortix/unistd.h>
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#include <sortix/kernel/copy.h>
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#include <sortix/kernel/descriptor.h>
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#include <sortix/kernel/dtable.h>
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#include <sortix/kernel/ioctx.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/kthread.h>
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#include <sortix/kernel/process.h>
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#include <sortix/kernel/refcount.h>
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#include <sortix/kernel/string.h>
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#include <sortix/kernel/syscall.h>
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#include <sortix/kernel/thread.h>
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#include <sortix/kernel/vnode.h>
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#include "partition.h"
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namespace Sortix {
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static Ref<Descriptor> PrepareLookup(const char* path, int dirfd)
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{
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if ( path[0] == '/' )
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return CurrentProcess()->GetRoot();
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if ( dirfd == AT_FDCWD )
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return CurrentProcess()->GetCWD();
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return CurrentProcess()->GetDescriptor(dirfd);
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}
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ssize_t sys_write(int fd, const void* buffer, size_t count)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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ssize_t ret = desc->write(&ctx, (const uint8_t*) buffer, count);
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return ret;
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}
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ssize_t sys_pwrite(int fd, const void* buffer, size_t count, off_t off)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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ssize_t ret = desc->pwrite(&ctx, (const uint8_t*) buffer, count, off);
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return ret;
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}
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ssize_t sys_read(int fd, void* buffer, size_t count)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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ssize_t ret = desc->read(&ctx, (uint8_t*) buffer, count);
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return ret;
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}
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ssize_t sys_pread(int fd, void* buffer, size_t count, off_t off)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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ssize_t ret = desc->pread(&ctx, (uint8_t*) buffer, count, off);
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return ret;
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}
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off_t sys_lseek(int fd, off_t offset, int whence)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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off_t ret = desc->lseek(&ctx, offset, whence);
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return ret;
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}
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int sys_close(int fd)
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{
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<DescriptorTable> dtable = CurrentProcess()->GetDTable();
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Ref<Descriptor> desc = dtable->FreeKeep(fd);
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dtable.Reset();
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if ( !desc )
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return -1;
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// TODO: This can be a significant bottleneck. All we need to do is ask the
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// filesystem for whether any errors occurred that should be reported
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// at close time.
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//return desc->sync(&ctx);
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return 0;
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}
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int sys_closefrom(int fd)
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{
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<DescriptorTable> dtable = CurrentProcess()->GetDTable();
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int ret = dtable->CloseFrom(fd);
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dtable.Reset();
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return ret;
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}
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int sys_dup(int fd)
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{
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Ref<DescriptorTable> dtable = CurrentProcess()->GetDTable();
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Ref<Descriptor> desc = dtable->Get(fd);
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return dtable->Allocate(desc, 0);
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}
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int sys_dup3(int oldfd, int newfd, int flags)
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{
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if ( flags & ~(O_CLOEXEC | O_CLOFORK) )
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return errno = EINVAL, -1;
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int fd_flags = 0;
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fd_flags |= flags & O_CLOEXEC ? FD_CLOEXEC : 0;
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fd_flags |= flags & O_CLOFORK ? FD_CLOFORK : 0;
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Ref<DescriptorTable> dtable = CurrentProcess()->GetDTable();
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return dtable->Copy(oldfd, newfd, fd_flags);
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}
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int sys_dup2(int oldfd, int newfd)
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{
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if ( oldfd < 0 || newfd < 0 )
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return errno = EINVAL, -1;
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int ret = sys_dup3(oldfd, newfd, 0);
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if ( ret < 0 && errno == EINVAL )
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return errno = 0, newfd;
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return ret;
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}
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// TODO: If this function fails the file may still have been created. Does a
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// standard prohibit this and is that the wrong thing?
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int sys_openat(int dirfd, const char* path, int flags, mode_t mode)
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{
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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int fdflags = 0;
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if ( flags & O_CLOEXEC ) fdflags |= FD_CLOEXEC;
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if ( flags & O_CLOFORK ) fdflags |= FD_CLOFORK;
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flags &= ~(O_CLOEXEC | O_CLOFORK);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, flags, mode);
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from.Reset();
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delete[] pathcopy;
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if ( !desc )
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return -1;
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Ref<DescriptorTable> dtable = CurrentProcess()->GetDTable();
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int ret = dtable->Allocate(desc, fdflags);
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if ( ret < 0 )
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{
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// TODO: We should use a fail-safe dtable reservation mechanism that
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// causes this error earlier before we have side effects.
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}
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return ret;
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}
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int sys_faccessat(int dirfd, const char* path, int mode, int flags)
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{
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if ( flags & ~(AT_SYMLINK_NOFOLLOW | AT_EACCESS) )
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return errno = EINVAL, -1;
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if ( mode & ~(X_OK | W_OK | R_OK) )
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return errno = EINVAL, -1;
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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int open_flags = O_READ | O_IS_STAT |
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(flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
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delete[] pathcopy;
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if ( !desc )
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return -1;
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ioctx_t kctx; SetupKernelIOCtx(&kctx);
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struct stat st;
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if ( desc->stat(&kctx, &st) < 0 )
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return -1;
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mode_t mask;
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if ( kctx.uid == 0 )
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mask = 0777;
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else if ( kctx.uid == st.st_uid )
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mask = 0700;
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else if ( kctx.gid == st.st_gid )
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mask = 0070;
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else
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mask = 0007;
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if ( (mode & X_OK) && !(st.st_mode & 0111 & mask) )
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return errno = EACCES, -1;
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if ( (mode & W_OK) && !(st.st_mode & 0222 & mask) )
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return errno = EACCES, -1;
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if ( (mode & R_OK) && !(st.st_mode & 0444 & mask) )
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return errno = EACCES, -1;
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return 0;
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}
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int sys_unlinkat(int dirfd, const char* path, int flags)
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{
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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int ret = from->unlinkat(&ctx, pathcopy, flags);
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delete[] pathcopy;
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return ret;
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}
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int sys_mkdirat(int dirfd, const char* path, mode_t mode)
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{
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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int ret = from->mkdir(&ctx, pathcopy, mode);
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delete[] pathcopy;
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return ret;
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}
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int sys_truncateat(int dirfd, const char* path, off_t length)
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{
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, O_WRITE);
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delete[] pathcopy;
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if ( !desc )
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return -1;
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return desc->truncate(&ctx, length);
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}
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int sys_ftruncate(int fd, off_t length)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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return desc->truncate(&ctx, length);
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}
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int sys_fstatat(int dirfd, const char* path, struct stat* st, int flags)
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{
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if ( flags & ~(AT_SYMLINK_NOFOLLOW) )
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return errno = EINVAL;
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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int open_flags = O_READ | O_IS_STAT |
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(flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
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delete[] pathcopy;
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if ( !desc )
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return -1;
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return desc->stat(&ctx, st);
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}
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int sys_fstat(int fd, struct stat* st)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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return desc->stat(&ctx, st);
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}
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int sys_fstatvfs(int fd, struct statvfs* stvfs)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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return desc->statvfs(&ctx, stvfs);
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}
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int sys_fstatvfsat(int dirfd, const char* path, struct statvfs* stvfs, int flags)
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{
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if ( flags & ~(AT_SYMLINK_NOFOLLOW) )
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return errno = EINVAL;
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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int open_flags = O_READ | O_IS_STAT |
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(flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
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delete[] pathcopy;
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if ( !desc )
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return -1;
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return desc->statvfs(&ctx, stvfs);
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}
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int sys_fcntl(int fd, int cmd, uintptr_t arg)
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{
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// Operations on the descriptor table.
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Ref<DescriptorTable> dtable = CurrentProcess()->GetDTable();
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if ( cmd == F_PREVFD )
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return dtable->Previous(fd);
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if ( cmd == F_NEXTFD )
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return dtable->Next(fd);
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// Operations on the file descriptior.
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if ( cmd == F_SETFD )
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return dtable->SetFlags(fd, (int) arg) ? 0 : -1;
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if ( cmd == F_GETFD )
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return dtable->GetFlags(fd);
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// Operations on the file description.
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if ( F_DECODE_CMD(F_DECODE_CMD_RAW(cmd)) == F_DUPFD_NUM )
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{
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int fd_flags = F_DECODE_FLAGS(F_DECODE_CMD_RAW(cmd));
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return dtable->Allocate(fd, fd_flags, (int) arg);
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}
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Ref<Descriptor> desc = dtable->Get(fd);
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if ( !desc )
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return -1;
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if ( cmd == F_SETFL )
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return desc->SetFlags((int) arg) ? 0 : -1;
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if ( cmd == F_GETFL )
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return desc->GetFlags();
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return errno = EINVAL, -1;
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}
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int sys_ioctl(int fd, int cmd, uintptr_t arg)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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return desc->ioctl(&ctx, cmd, arg);
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}
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ssize_t sys_readdirents(int fd, struct dirent* dirent, size_t size)
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{
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if ( SSIZE_MAX < size )
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size = SSIZE_MAX;
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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return desc->readdirents(&ctx, dirent, size);
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}
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int sys_fchdir(int fd)
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{
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Process* process = CurrentProcess();
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Ref<Descriptor> desc = process->GetDescriptor(fd);
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if ( !desc )
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return -1;
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if ( !S_ISDIR(desc->type) )
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return errno = ENOTDIR, -1;
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process->SetCWD(desc);
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return 0;
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}
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int sys_fchdirat(int dirfd, const char* path)
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{
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, O_READ | O_DIRECTORY);
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from.Reset();
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delete[] pathcopy;
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if ( !desc )
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return -1;
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CurrentProcess()->SetCWD(desc);
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return 0;
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}
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int sys_fchroot(int fd)
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{
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Process* process = CurrentProcess();
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Ref<Descriptor> desc = process->GetDescriptor(fd);
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if ( !desc )
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return -1;
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if ( !S_ISDIR(desc->type) )
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return errno = ENOTDIR, -1;
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process->SetRoot(desc);
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return 0;
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}
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int sys_fchrootat(int dirfd, const char* path)
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{
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, O_READ | O_DIRECTORY);
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from.Reset();
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delete[] pathcopy;
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if ( !desc )
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return -1;
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CurrentProcess()->SetRoot(desc);
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return 0;
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}
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int sys_fchown(int fd, uid_t owner, gid_t group)
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{
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Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
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if ( !desc )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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return desc->chown(&ctx, owner, group);
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}
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int sys_fchownat(int dirfd, const char* path, uid_t owner, gid_t group, int flags)
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{
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if ( flags & ~(AT_SYMLINK_NOFOLLOW) )
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return errno = EINVAL, -1;
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char* pathcopy = GetStringFromUser(path);
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if ( !pathcopy )
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return -1;
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ioctx_t ctx; SetupUserIOCtx(&ctx);
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Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
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if ( !from ) { delete[] pathcopy; return -1; }
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int open_flags = O_READ | (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
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Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
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from.Reset();
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delete[] pathcopy;
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if ( !desc )
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return -1;
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return desc->chown(&ctx, owner, group);
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}
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|
|
#if defined(__i386__)
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struct fchownat_request /* duplicated in libc/unistd/fchownat.c */
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{
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int dirfd;
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const char* path;
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uid_t owner;
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gid_t group;
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int flags;
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};
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|
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int sys_fchownat_wrapper(const struct fchownat_request* user_request)
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{
|
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struct fchownat_request request;
|
|
if ( !CopyFromUser(&request, user_request, sizeof(request)) )
|
|
return -1;
|
|
return sys_fchownat(request.dirfd, request.path, request.owner,
|
|
request.group, request.flags);
|
|
}
|
|
#endif
|
|
|
|
int sys_fchmod(int fd, mode_t mode)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->chmod(&ctx, mode);
|
|
}
|
|
|
|
int sys_fchmodat(int dirfd, const char* path, mode_t mode, int flags)
|
|
{
|
|
if ( flags & ~(AT_SYMLINK_NOFOLLOW) )
|
|
return errno = EINVAL, -1;
|
|
char* pathcopy = GetStringFromUser(path);
|
|
if ( !pathcopy )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
|
|
if ( !from ) { delete[] pathcopy; return -1; }
|
|
int open_flags = O_READ | (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
|
|
Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
|
|
from.Reset();
|
|
delete[] pathcopy;
|
|
if ( !desc )
|
|
return -1;
|
|
return desc->chmod(&ctx, mode);
|
|
}
|
|
|
|
int sys_futimens(int fd, const struct timespec* user_times)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->utimens(&ctx, user_times);
|
|
}
|
|
|
|
int sys_utimensat(int dirfd, const char* path,
|
|
const struct timespec* user_times, int flags)
|
|
{
|
|
if ( flags & ~(AT_SYMLINK_NOFOLLOW) )
|
|
return errno = EINVAL, -1;
|
|
char* pathcopy = GetStringFromUser(path);
|
|
if ( !pathcopy )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
|
|
if ( !from ) { delete[] pathcopy; return -1; }
|
|
int open_flags = O_READ | (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
|
|
Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
|
|
from.Reset();
|
|
delete[] pathcopy;
|
|
if ( !desc )
|
|
return -1;
|
|
return desc->utimens(&ctx, user_times);
|
|
}
|
|
|
|
int sys_linkat(int olddirfd, const char* oldpath,
|
|
int newdirfd, const char* newpath,
|
|
int flags)
|
|
{
|
|
if ( flags & ~(AT_SYMLINK_FOLLOW) )
|
|
return errno = EINVAL, -1;
|
|
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
|
|
char* newpathcopy = GetStringFromUser(newpath);
|
|
if ( !newpathcopy )
|
|
return -1;
|
|
Ref<Descriptor> newfrom(PrepareLookup(newpathcopy, newdirfd));
|
|
if ( !newfrom ) { delete[] newpathcopy; return -1; }
|
|
|
|
char* final_elem;
|
|
Ref<Descriptor> dir = OpenDirContainingPath(&ctx, newfrom, newpathcopy,
|
|
&final_elem);
|
|
delete[] newpathcopy;
|
|
if ( !dir )
|
|
return -1;
|
|
|
|
char* oldpathcopy = GetStringFromUser(oldpath);
|
|
if ( !oldpathcopy ) { delete[] final_elem; return -1; }
|
|
Ref<Descriptor> oldfrom = PrepareLookup(oldpathcopy, olddirfd);
|
|
if ( !oldfrom ) { delete[] oldpathcopy; delete[] final_elem; return -1; }
|
|
|
|
int open_flags = O_READ | (flags & AT_SYMLINK_FOLLOW ? 0 : O_SYMLINK_NOFOLLOW);
|
|
Ref<Descriptor> file = oldfrom->open(&ctx, oldpathcopy, open_flags);
|
|
delete[] oldpathcopy;
|
|
if ( !file ) { delete[] final_elem; return -1; }
|
|
|
|
int ret = dir->link(&ctx, final_elem, file);
|
|
delete[] final_elem;
|
|
return ret;
|
|
}
|
|
|
|
int sys_symlinkat(const char* oldpath, int newdirfd, const char* newpath)
|
|
{
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
|
|
char* newpath_copy = GetStringFromUser(newpath);
|
|
if ( !newpath_copy )
|
|
return -1;
|
|
char* oldpath_copy = GetStringFromUser(oldpath);
|
|
if ( !oldpath_copy )
|
|
return delete[] newpath_copy, -1;
|
|
|
|
Ref<Descriptor> newfrom(PrepareLookup(newpath_copy, newdirfd));
|
|
if ( !newfrom )
|
|
return delete[] newpath_copy, -1;
|
|
|
|
int ret = newfrom->symlink(&ctx, oldpath, newpath_copy);
|
|
|
|
delete[] oldpath_copy;
|
|
delete[] newpath_copy;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int sys_settermmode(int fd, unsigned mode)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->settermmode(&ctx, mode);
|
|
}
|
|
|
|
int sys_gettermmode(int fd, unsigned* mode)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->gettermmode(&ctx, mode);
|
|
}
|
|
|
|
int sys_isatty(int fd)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return 0;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->isatty(&ctx);
|
|
}
|
|
|
|
int sys_tcgetwincurpos(int fd, struct wincurpos* wcp)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcgetwincurpos(&ctx, wcp);
|
|
}
|
|
|
|
int sys_tcgetwinsize(int fd, struct winsize* ws)
|
|
{
|
|
return sys_ioctl(fd, TIOCGWINSZ, (uintptr_t) ws);
|
|
}
|
|
|
|
int sys_tcsetpgrp(int fd, pid_t pgid)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcsetpgrp(&ctx, pgid);
|
|
}
|
|
|
|
int sys_tcgetpgrp(int fd)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcgetpgrp(&ctx);
|
|
}
|
|
|
|
static int sys_renameat_inner(int olddirfd, const char* oldpath,
|
|
int newdirfd, const char* newpath)
|
|
{
|
|
Ref<Descriptor> olddir(PrepareLookup(oldpath, olddirfd));
|
|
if ( !olddir )
|
|
return -1;
|
|
|
|
Ref<Descriptor> newdir(PrepareLookup(newpath, newdirfd));
|
|
if ( !newdir )
|
|
return -1;
|
|
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return newdir->rename_here(&ctx, olddir, oldpath, newpath);
|
|
}
|
|
|
|
int sys_renameat(int olddirfd, const char* oldpath,
|
|
int newdirfd, const char* newpath)
|
|
{
|
|
char* oldpathcopy = GetStringFromUser(oldpath);
|
|
if ( !oldpathcopy ) return -1;
|
|
char* newpathcopy = GetStringFromUser(newpath);
|
|
if ( !newpathcopy ) { delete[] oldpathcopy; return -1; }
|
|
int ret = sys_renameat_inner(olddirfd, oldpathcopy, newdirfd, newpathcopy);
|
|
delete[] newpathcopy;
|
|
delete[] oldpathcopy;
|
|
return ret;
|
|
}
|
|
|
|
// TODO: This should probably be moved into user-space. It'd be nice if
|
|
// user-space could just open the symlink and read/write it like a regular file.
|
|
ssize_t sys_readlinkat(int dirfd, const char* path, char* buf, size_t size)
|
|
{
|
|
char* pathcopy = GetStringFromUser(path);
|
|
if ( !pathcopy )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
|
|
if ( !from ) { delete[] pathcopy; return -1; }
|
|
Ref<Descriptor> desc = from->open(&ctx, pathcopy, O_READ | O_SYMLINK_NOFOLLOW);
|
|
delete[] pathcopy;
|
|
if ( !desc )
|
|
return -1;
|
|
return desc->readlink(&ctx, buf, size);
|
|
}
|
|
|
|
int sys_fsync(int fd)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->sync(&ctx);
|
|
}
|
|
|
|
int sys_accept4(int fd, void* addr, size_t* addrlen, int flags)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
int fdflags = 0;
|
|
if ( flags & SOCK_CLOEXEC ) fdflags |= FD_CLOEXEC;
|
|
if ( flags & SOCK_CLOFORK ) fdflags |= FD_CLOFORK;
|
|
flags &= ~(SOCK_CLOEXEC | SOCK_CLOFORK);
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
Ref<Descriptor> conn = desc->accept4(&ctx, (uint8_t*) addr, addrlen, flags);
|
|
if ( !conn )
|
|
return -1;
|
|
return CurrentProcess()->GetDTable()->Allocate(conn, fdflags);
|
|
}
|
|
|
|
int sys_bind(int fd, const void* addr, size_t addrlen)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->bind(&ctx, (const uint8_t*) addr, addrlen);
|
|
}
|
|
|
|
int sys_connect(int fd, const void* addr, size_t addrlen)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->connect(&ctx, (const uint8_t*) addr, addrlen);
|
|
}
|
|
|
|
int sys_listen(int fd, int backlog)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->listen(&ctx, backlog);
|
|
}
|
|
|
|
ssize_t sys_recv(int fd, void* buffer, size_t count, int flags)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->recv(&ctx, (uint8_t*) buffer, count, flags);
|
|
}
|
|
|
|
ssize_t sys_send(int fd, const void* buffer, size_t count, int flags)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->send(&ctx, (const uint8_t*) buffer, count, flags);
|
|
}
|
|
|
|
ssize_t sys_readv(int fd, const struct iovec* iov, int iovcnt)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->readv(&ctx, iov, iovcnt);
|
|
}
|
|
|
|
ssize_t sys_preadv(int fd, const struct iovec* iov, int iovcnt, off_t offset)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->preadv(&ctx, iov, iovcnt, offset);
|
|
}
|
|
|
|
ssize_t sys_writev(int fd, const struct iovec* iov, int iovcnt)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->writev(&ctx, iov, iovcnt);
|
|
}
|
|
|
|
ssize_t sys_pwritev(int fd, const struct iovec* iov, int iovcnt, off_t offset)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->pwritev(&ctx, iov, iovcnt, offset);
|
|
}
|
|
|
|
int sys_mkpartition(int fd, off_t start, off_t length, int flags)
|
|
{
|
|
int fdflags = 0;
|
|
if ( flags & O_CLOEXEC ) fdflags |= FD_CLOEXEC;
|
|
if ( flags & O_CLOFORK ) fdflags |= FD_CLOFORK;
|
|
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
|
|
int dflags = desc->GetFlags();
|
|
Ref<Inode> inner_inode = desc->vnode->inode;
|
|
desc.Reset();
|
|
|
|
if ( inner_inode->type & S_IFNEVERWRAP )
|
|
return errno = EPERM, -1;
|
|
if ( !S_ISBLK(inner_inode->type) && !S_ISREG(inner_inode->type) )
|
|
return errno = EPERM, -1;
|
|
if ( start < 0 || length < 0 )
|
|
return errno = EINVAL, -1;
|
|
off_t end;
|
|
if ( __builtin_add_overflow(start, length, &end) )
|
|
return errno = EOVERFLOW, -1;
|
|
|
|
Ref<Inode> partition(new Partition(inner_inode, start, length));
|
|
if ( !partition )
|
|
return -1;
|
|
inner_inode.Reset();
|
|
|
|
Ref<Vnode> partition_vnode(new Vnode(partition, Ref<Vnode>(NULL), 0, 0));
|
|
if ( !partition_vnode )
|
|
return -1;
|
|
partition.Reset();
|
|
|
|
Ref<Descriptor> partition_desc(new Descriptor(partition_vnode, dflags));
|
|
if ( !partition_desc )
|
|
return -1;
|
|
partition_vnode.Reset();
|
|
|
|
return CurrentProcess()->GetDTable()->Allocate(partition_desc, fdflags);
|
|
}
|
|
|
|
ssize_t sys_sendmsg(int fd, const struct msghdr* msg, int flags)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->sendmsg(&ctx, msg, flags);
|
|
}
|
|
|
|
ssize_t sys_recvmsg(int fd, struct msghdr* msg, int flags)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->recvmsg(&ctx, msg, flags);
|
|
}
|
|
|
|
int sys_getsockopt(int fd, int level, int option_name,
|
|
void* option_value, size_t* option_size_ptr)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->getsockopt(&ctx, level, option_name, option_value, option_size_ptr);
|
|
}
|
|
|
|
int sys_setsockopt(int fd, int level, int option_name,
|
|
const void* option_value, size_t option_size)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->setsockopt(&ctx, level, option_name, option_value, option_size);
|
|
}
|
|
|
|
ssize_t sys_tcgetblob(int fd, const char* name, void* buffer, size_t count)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
|
|
char* name_copy = NULL;
|
|
if ( name && !(name_copy = GetStringFromUser(name)) )
|
|
return -1;
|
|
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
ssize_t result = desc->tcgetblob(&ctx, name_copy, buffer, count);
|
|
delete[] name_copy;
|
|
return result;
|
|
}
|
|
|
|
ssize_t sys_tcsetblob(int fd, const char* name, const void* buffer, size_t count)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
|
|
char* name_copy = NULL;
|
|
if ( name && !(name_copy = GetStringFromUser(name)) )
|
|
return -1;
|
|
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
ssize_t result = desc->tcsetblob(&ctx, name_copy, buffer, count);
|
|
delete[] name_copy;
|
|
return result;
|
|
}
|
|
|
|
int sys_getpeername(int fd, void* addr, size_t* addrsize)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->getpeername(&ctx, (uint8_t*) addr, addrsize);
|
|
}
|
|
|
|
int sys_getsockname(int fd, void* addr, size_t* addrsize)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->getsockname(&ctx, (uint8_t*) addr, addrsize);
|
|
}
|
|
|
|
int sys_shutdown(int fd, int how)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->shutdown(&ctx, how);
|
|
}
|
|
|
|
int sys_unmountat(int dirfd, const char* path, int flags)
|
|
{
|
|
char* pathcopy = GetStringFromUser(path);
|
|
if ( !pathcopy )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
|
|
if ( !from )
|
|
return delete[] pathcopy, -1;
|
|
int ret = from->unmount(&ctx, pathcopy, flags);
|
|
delete[] pathcopy;
|
|
return ret;
|
|
}
|
|
|
|
int sys_fsm_fsbind(int rootfd, int mpointfd, int flags)
|
|
{
|
|
if ( flags & ~(0) )
|
|
return errno = EINVAL, -1;
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(rootfd);
|
|
if ( !desc )
|
|
return -1;
|
|
Ref<Descriptor> mpoint = CurrentProcess()->GetDescriptor(mpointfd);
|
|
if ( !mpoint )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return mpoint->fsm_fsbind(&ctx, desc, flags);
|
|
}
|
|
|
|
int sys_fsm_mountat(int dirfd, const char* path, const struct stat* rootst, int flags)
|
|
{
|
|
if ( flags & ~(FSM_MOUNT_CLOEXEC | FSM_MOUNT_CLOFORK |
|
|
FSM_MOUNT_NOFOLLOW | FSM_MOUNT_NONBLOCK) )
|
|
return -1;
|
|
int fdflags = 0;
|
|
if ( flags & FSM_MOUNT_CLOEXEC ) fdflags |= FD_CLOEXEC;
|
|
if ( flags & FSM_MOUNT_CLOFORK ) fdflags |= FD_CLOFORK;
|
|
flags &= ~(FSM_MOUNT_CLOEXEC | FSM_MOUNT_CLOFORK);
|
|
char* pathcopy = GetStringFromUser(path);
|
|
if ( !pathcopy )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
|
|
if ( !from )
|
|
return delete[] pathcopy, -1;
|
|
Ref<DescriptorTable> dtable = CurrentProcess()->GetDTable();
|
|
int reservation;
|
|
if ( !dtable->Reserve(1, &reservation) )
|
|
return delete[] pathcopy, -1;
|
|
Ref<Descriptor> desc = from->fsm_mount(&ctx, pathcopy, rootst, flags);
|
|
delete[] pathcopy;
|
|
if ( !desc )
|
|
return dtable->Unreserve(&reservation), -1;
|
|
int ret = dtable->Allocate(desc, fdflags, 0, &reservation);
|
|
assert(0 <= ret);
|
|
return ret;
|
|
}
|
|
|
|
int sys_tcdrain(int fd)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcdrain(&ctx);
|
|
}
|
|
|
|
int sys_tcflow(int fd, int action)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcflow(&ctx, action);
|
|
}
|
|
|
|
int sys_tcflush(int fd, int queue_selector)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcflush(&ctx, queue_selector);
|
|
}
|
|
|
|
int sys_tcgetattr(int fd, struct termios* tio)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcgetattr(&ctx, tio);
|
|
}
|
|
|
|
pid_t sys_tcgetsid(int fd)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcgetsid(&ctx);
|
|
}
|
|
|
|
int sys_tcsendbreak(int fd, int duration)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcsendbreak(&ctx, duration);
|
|
}
|
|
|
|
int sys_tcsetattr(int fd, int actions, const struct termios* tio)
|
|
{
|
|
Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
|
|
if ( !desc )
|
|
return -1;
|
|
ioctx_t ctx; SetupUserIOCtx(&ctx);
|
|
return desc->tcsetattr(&ctx, actions, tio);
|
|
}
|
|
|
|
} // namespace Sortix
|