38 lines
828 B
C
38 lines
828 B
C
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#include <unistd.h>
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#ifdef _THREAD_SAFE
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#include <pthread.h>
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#include "pthread_private.h"
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int
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dup(int fd)
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{
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int ret;
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/* Lock the file descriptor: */
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if ((ret = _thread_fd_lock(fd, FD_RDWR, NULL, __FILE__, __LINE__)) == 0) {
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/* Perform the 'dup' syscall: */
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if ((ret = _thread_sys_dup(fd)) < 0) {
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}
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/* Initialise the file descriptor table entry: */
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else if (_thread_fd_table_init(ret) != 0) {
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/* Quietly close the file: */
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_thread_sys_close(ret);
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/* Reset the file descriptor: */
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ret = -1;
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} else {
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/*
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* Save the file open flags so that they can be
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* checked later:
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*/
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_thread_fd_table[ret]->flags = _thread_fd_table[fd]->flags;
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}
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/* Unlock the file descriptor: */
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_thread_fd_unlock(fd, FD_RDWR);
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}
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/* Return the completion status: */
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return (ret);
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}
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#endif
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