int dup2(int fd1, int fd2)
{
/* Check the range of the descriptor to see if we got a file or a socket
* descriptor.
*/
if ((unsigned int)fd1 >= CONFIG_NFILE_DESCRIPTORS)
{
/* Not a valid file descriptor. Did we get a valid socket descriptor? */
if ((unsigned int)fd1 < (CONFIG_NFILE_DESCRIPTORS+CONFIG_NSOCKET_DESCRIPTORS))
{
/* Yes.. dup the socket descriptor */
return net_dupsd2(fd1, fd2);
}
else
{
/* No.. then it is a bad descriptor number */
set_errno(EBADF);
return ERROR;
}
}
else
{
/* Its a valid file descriptor.. dup the file descriptor */
return fs_dupfd2(fd1, fd2);
}
}
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)fs_dupfd2(0, 1);
(void)fs_dupfd2(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)
{
sinfo("Open /dev/console fd: %d\n", fd);
(void)close(fd);
}
else
{
serr("ERROR: 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
}
