Kernel/LibC: add dup() syscall and function

This commit is contained in:
Bananymous 2023-08-17 12:03:29 +03:00
parent 5bd7099b96
commit 8e4216215e
7 changed files with 37 additions and 7 deletions

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@ -25,6 +25,7 @@ namespace Kernel
BAN::ErrorOr<void> pipe(int fds[2]);
BAN::ErrorOr<int> dup(int);
BAN::ErrorOr<int> dup2(int, int);
BAN::ErrorOr<void> seek(int fd, off_t offset, int whence);

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@ -86,6 +86,7 @@ namespace Kernel
BAN::ErrorOr<long> sys_creat(BAN::StringView name, mode_t);
BAN::ErrorOr<long> sys_pipe(int fildes[2]);
BAN::ErrorOr<long> sys_dup(int fildes);
BAN::ErrorOr<long> sys_dup2(int fildes, int fildes2);
BAN::ErrorOr<long> sys_seek(int fd, off_t offset, int whence);

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@ -85,6 +85,19 @@ namespace Kernel
return {};
}
BAN::ErrorOr<int> OpenFileDescriptorSet::dup(int fildes)
{
TRY(validate_fd(fildes));
int result = TRY(get_free_fd());
m_open_files[result] = m_open_files[fildes];
if (m_open_files[result]->flags & O_WRONLY && m_open_files[result]->inode->is_pipe())
((Pipe*)m_open_files[result]->inode.ptr())->clone_writing();
return result;
}
BAN::ErrorOr<int> OpenFileDescriptorSet::dup2(int fildes, int fildes2)
{
if (fildes2 < 0 || fildes2 >= (int)m_open_files.size())

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@ -596,6 +596,12 @@ namespace Kernel
return 0;
}
BAN::ErrorOr<long> Process::sys_dup(int fildes)
{
LockGuard _(m_lock);
return TRY(m_open_file_descriptors.dup(fildes));
}
BAN::ErrorOr<long> Process::sys_dup2(int fildes, int fildes2)
{
LockGuard _(m_lock);

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@ -149,6 +149,9 @@ namespace Kernel
case SYS_PIPE:
ret = Process::current().sys_pipe((int*)arg1);
break;
case SYS_DUP:
ret = Process::current().sys_dup((int)arg1);
break;
case SYS_DUP2:
ret = Process::current().sys_dup2((int)arg1, (int)arg2);
break;

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@ -40,13 +40,14 @@ __BEGIN_DECLS
#define SYS_SET_PWD 33
#define SYS_CLOCK_GETTIME 34
#define SYS_PIPE 35
#define SYS_DUP2 36
#define SYS_RAISE 37
#define SYS_KILL 38
#define SYS_SIGNAL 39
#define SYS_SIGNAL_DONE 40
#define SYS_TCSETPGRP 41
#define SYS_GET_PID 42
#define SYS_DUP 36
#define SYS_DUP2 37
#define SYS_RAISE 38
#define SYS_KILL 39
#define SYS_SIGNAL 40
#define SYS_SIGNAL_DONE 41
#define SYS_TCSETPGRP 42
#define SYS_GET_PID 43
__END_DECLS

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@ -61,6 +61,11 @@ ssize_t write(int fildes, const void* buf, size_t nbyte)
return syscall(SYS_WRITE, fildes, buf, nbyte);
}
int dup(int fildes)
{
return syscall(SYS_DUP, fildes);
}
int dup2(int fildes, int fildes2)
{
return syscall(SYS_DUP2, fildes, fildes2);