static inline void sched_dupfiles(FAR struct task_tcb_s *tcb)
{
/* The parent task is the one at the head of the ready-to-run list */
FAR struct tcb_s *rtcb = (FAR struct tcb_s *)g_readytorun.head;
FAR struct file *parent;
FAR struct file *child;
int i;
DEBUGASSERT(tcb && tcb->cmn.group && rtcb->group);
/* Duplicate the file descriptors. This will be either all of the
* file descriptors or just the first three (stdin, stdout, and stderr)
* if CONFIG_FDCLONE_STDIO is defined. NFSDS_TOCLONE is set
* accordingly above.
*/
/* Get pointers to the parent and child task file lists */
parent = rtcb->group->tg_filelist.fl_files;
child = tcb->cmn.group->tg_filelist.fl_files;
/* Check each file in the parent file list */
for (i = 0; i < NFDS_TOCLONE; i++)
{
/* Check if this file is opened by the parent. We can tell if
* if the file is open because it contain a reference to a non-NULL
* i-node structure.
*/
if (parent[i].f_inode)
{
/* Yes... duplicate it for the child */
(void)file_dup2(&parent[i], &child[i]);
}
}
}
int group_setupidlefiles(FAR struct task_tcb_s *tcb)
{
#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NSOCKET_DESCRIPTORS > 0
FAR struct task_group_s *group = tcb->cmn.group;
#endif
#if CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_DEV_CONSOLE)
int fd;
#endif
#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NSOCKET_DESCRIPTORS > 0
DEBUGASSERT(group);
#endif
#if CONFIG_NFILE_DESCRIPTORS > 0
/* Initialize file descriptors for the TCB */
files_initlist(&group->tg_filelist);
#endif
#if CONFIG_NSOCKET_DESCRIPTORS > 0
/* Allocate socket descriptors for the TCB */
net_initlist(&group->tg_socketlist);
#endif
/* Open stdin, dup to get stdout and stderr. This should always
* be the first file opened and, hence, should always get file
* descriptor 0.
*/
#if CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_DEV_CONSOLE)
fd = open("/dev/console", O_RDWR);
if (fd == 0)
{
/* Successfully opened /dev/console as stdin (fd == 0) */
(void)file_dup2(0, 1);
(void)file_dup2(0, 2);
}
else
{
/* We failed to open /dev/console OR for some reason, we opened
* it and got some file descriptor other than 0.
*/
if (fd > 0)
{
slldbg("Open /dev/console fd: %d\n", fd);
(void)close(fd);
}
else
{
slldbg("Failed to open /dev/console: %d\n", errno);
}
return -ENFILE;
}
#endif
/* Allocate file/socket streams for the TCB */
#if CONFIG_NFILE_STREAMS > 0
return group_setupstreams(tcb);
#else
return OK;
#endif
}
int sched_setupidlefiles(FAR _TCB *tcb)
{
#if CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_DEV_CONSOLE)
int fd;
#endif
#if CONFIG_NFILE_DESCRIPTORS > 0
/* Allocate file descriptors for the TCB */
tcb->filelist = files_alloclist();
if (!tcb->filelist)
{
return -ENOMEM;
}
#endif /* CONFIG_NFILE_DESCRIPTORS */
#if CONFIG_NSOCKET_DESCRIPTORS > 0
/* Allocate socket descriptors for the TCB */
tcb->sockets = net_alloclist();
if (!tcb->sockets)
{
return -ENOMEM;
}
#endif /* CONFIG_NSOCKET_DESCRIPTORS */
#if CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_DEV_CONSOLE)
/* Open stdin, dup to get stdout and stderr. This should always
* be the first file opened and, hence, should always get file
* descriptor 0.
*/
fd = open("/dev/console", O_RDWR);
if (fd == 0)
{
/* Successfully opened /dev/console as stdin (fd == 0) */
(void)file_dup2(0, 1);
(void)file_dup2(0, 2);
}
else
{
/* We failed to open /dev/console OR for some reason, we opened
* it and got some file descriptor other than 0.
*/
if (fd >- 0)
{
slldbg("Open /dev/console fd: %d\n", fd);
(void)close(fd);
}
else
{
slldbg("Failed to open /dev/console: %d\n", errno);
}
return -ENFILE;
}
#if CONFIG_NFILE_STREAMS > 0
/* Allocate file strems for the TCB */
return sched_setupstreams(tcb);
#else
return OK;
#endif /* CONFIG_NFILE_STREAMS */
#else
return OK;
#endif /* CONFIG_NFILE_DESCRIPTORS && CONFIG_DEV_CONSOLE */
}