apio/Luna
1
1
Fork 0
Code Issues Pull Requests Actions Projects Releases 8 Wiki Activity

fcntl(F_DUPFD): Allocate any file descriptor greater than or equal to arg

Browse Source
This commit is contained in:
apio 2022-10-17 17:01:22 +02:00
parent 891651f2d6
commit ce10fb5743
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
kernel/src/sys/stdio.cpp
View File

@ -20,7 +20,7 @@
#define FNCTL_DUPFD 0 #define FNCTL_DUPFD 0
void sys_fcntl(Context* context, int fd, int command, [[maybe_unused]] uintptr_t arg) void sys_fcntl(Context* context, int fd, int command, uintptr_t arg)
{ {
if (fd >= TASK_MAX_FDS || fd < 0) if (fd >= TASK_MAX_FDS || fd < 0)
{ {
@ -34,10 +34,14 @@ void sys_fcntl(Context* context, int fd, int command, [[maybe_unused]] uintptr_t
return; return;
} }
Descriptor& file = current_task->files[fd]; Descriptor& file = current_task->files[fd];
if (command == FNCTL_DUPFD) // FIXME: If arg is greater than 0, return the lowest numbered available file descriptor if (command == FNCTL_DUPFD)
// greater than or equal to arg.
{ {
int dupfd = current_task->alloc_fd(); if ((int)arg < 0 || (int)arg >= TASK_MAX_FDS)
{
context->rax = -EINVAL;
return;
}
int dupfd = current_task->alloc_fd_greater_than_or_equal((int)arg);
if (dupfd < 0) if (dupfd < 0)
{ {
context->rax = -EMFILE; context->rax = -EMFILE;