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Toute la documentation sur la certification Linux LPI

tee

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#define _GNU_SOURCE

#include <fcntl.h>



long tee(int fd_in, int fd_out, size_t len, unsigned int flags);

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flags ¤Ï°ìÏ¢¤Î½¤¾þ¥Õ¥é¥°¤Ç¤¢¤ê¡¢ splice(2) ¤ä vmsplice(2) ¤È¶¦Ä̤Î̾Á°¤Ç¤¢¤ë¡£

SPLICE_F_MOVE

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SPLICE_F_NONBLOCK

Æþ½ÐÎÏ»þ¤ËÄä»ß (block) ¤·¤Ê¤¤¡£ ¾ÜºÙ¤Ï splice(2) »²¾È¡£

SPLICE_F_MORE

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SPLICE_F_GIFT

tee() ¤Ç¤Ï̤»ÈÍÑ¡£ vmsplice(2) »²¾È¡£

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¥¨¥é¡¼¤Î¾ì¹ç¡¢ tee() ¤Ï -1 ¤òÊÖ¤·¡¢ errno ¤Ë¥¨¥é¡¼¤ò¼¨¤¹ÃͤòÀßÄꤹ¤ë¡£

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EINVAL

fd_in ¤È fd_out ¤Î¤É¤Á¤é¤«¤¬¥Ñ¥¤¥×¤ò»²¾È¤·¤Æ¤¤¤Ê¤¤¡£¤â¤·¤¯¤Ï fd_in ¤È fd_out ¤¬Æ±¤¸¥Ñ¥¤¥×¤ò»²¾È¤·¤Æ¤¤¤ë¡£

ENOMEM

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tee(2) ¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ï Linux 2.6.17 ¤Ç½é¤á¤ÆÅо줷¤¿¡£

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°Ê²¼¤ÎÎã¤Ï¡¢ tee(2) ¥·¥¹¥Æ¥à¥³¡¼¥ë¤ò»È¤Ã¤Æ¡¢ ´ðËÜŪ¤Ê tee(1) ¥×¥í¥°¥é¥à¤ò¼ÂÁõ¤·¤¿¤â¤Î¤Ç¤¢¤ë¡£

#define _GNU_SOURCE

#include <fcntl.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <assert.h>

#include <errno.h>

#include <limits.h>



int

main(int argc, char *argv[])

{

    int fd;

    int len, slen;



    assert(argc == 2);



    fd = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0644);

    if (fd == -1) {

        perror("open");

        exit(EXIT_FAILURE);

    }



    do {

        /*

         * tee stdin to stdout.

         */

        len = tee(STDIN_FILENO, STDOUT_FILENO,

                  INT_MAX, SPLICE_F_NONBLOCK);



        if (len < 0) {

            if (errno == EAGAIN)

                continue;

            perror("tee");

            exit(EXIT_FAILURE);

        } else

            if (len == 0)

                break;



        /*

         * Consume stdin by splicing it to a file.

         */

        while (len > 0) {

            slen = splice(STDIN_FILENO, NULL, fd, NULL,

                          len, SPLICE_F_MOVE);

            if (slen < 0) {

                perror("splice");

                break;

            }

            len -= slen;

        }

    } while (1);



    close(fd);

    exit(EXIT_SUCCESS);

}

´ØÏ¢¹àÌÜ

splice(2), vmsplice(2), feature_test_macros(7)