getgrent_r

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Version: 2003-11-15 (openSuse - 09/10/07)

Section: 3 (Bibliothèques de fonctions)

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̾Á°

getgrent_r, fgetgrent_r - ¥°¥ë¡¼¥×¥Õ¥¡¥¤¥ë¥¨¥ó¥È¥ê¤ò¥ê¥¨¥ó¥È¥é¥ó¥È (reentrant) ¤Ë¼è¤ê½Ð¤¹

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#define _GNU_SOURCE




#include <grp.h>



int getgrent_r(struct group *gbuf, char *buf,




               size_t buflen, struct group **gbufp);



int fgetgrent_r(FILE *fp, struct group *gbuf, char *buf,




                size_t buflen, struct group **gbufp);
 

ÀâÌÀ

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group ¹½Â¤ÂÎ¤Ï <grp.h> ¤Ë¤ª¤¤¤Æ°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë:


struct group {

    char    *gr_name;      /* ¥°¥ë¡¼¥×̾ */

    char    *gr_passwd;    /* ¥°¥ë¡¼¥×¥Ñ¥¹¥ï¡¼¥É */

    gid_t   gr_gid;        /* ¥°¥ë¡¼¥× ID */

    char    **gr_mem;      /* ¥°¥ë¡¼¥×¥á¥ó¥Ð */

};

¥ê¥¨¥ó¥È¥é¥ó¥È¤Ç¤Ê¤¤´Ø¿ô¤ÏÀÅŪ¤Ê³ÊǼÎΰè¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£ ¤³¤ÎÀÅŪ¤Ê³ÊǼÎΰè¤Ë¤Ï¡¢¹¹¤Ë¥°¥ë¡¼¥×̾¡¦¥Ñ¥¹¥ï¡¼¥É¡¦ ¥á¥ó¥Ð¤Ø¤Î¥Ý¥¤¥ó¥¿¤¬´Þ¤Þ¤ì¤ë¡£ ¤³¤³¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë¥ê¥¨¥ó¥È¥é¥ó¥È¤Ê´Ø¿ô¤Ï¡¢ ¸Æ¤Ó½Ð¤·Â¦¤«¤éÄ󶡤µ¤ì¤ë¥Ð¥Ã¥Õ¥¡¤Ë¥°¥ë¡¼¥×̾¤Ê¤ÉÁ´¤Æ¤òÊÖ¤¹¡£ ºÇ½é¤Î°ú¤­¿ô¤È¤·¤Æ struct group ¤òÊÝ»ý¤Ç¤­¤ë¥Ð¥Ã¥Õ¥¡ gbuf ¤¬¤¢¤ë¡£ ¼¡¤Ë¤½¤Î¾¤Îʸ»úÎó¤òÊÝ»ý¤Ç¤­¤ë¥µ¥¤¥º buflen ¤Î¥Ð¥Ã¥Õ¥¡ buf ¤¬¤¢¤ë¡£ ¤³¤ì¤é¤Î´Ø¿ô¤Î·ë²Ì (¥¹¥È¥ê¡¼¥à¤«¤éÆɤ߹þ¤Þ¤ì¤¿ struct group) ¤Ï¡¢ Ä󶡤µ¤ì¤¿¥Ð¥Ã¥Õ¥¡ *gbuf ¤Ë³ÊǼ¤µ¤ì¡¢¤³¤Î struct group ¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ï *gbufp ¤ËÊÖ¤µ¤ì¤ë¡£

ÊÖ¤êÃÍ

À®¸ù¤·¤¿¾ì¹ç¡¢¤³¤ì¤é¤Î´Ø¿ô¤Ï 0 ¤òÊÖ¤·¡¢ *gbufp ¤Ï struct group ¤Ø¤Î¥Ý¥¤¥ó¥¿¤È¤Ê¤ë¡£ ¥¨¥é¡¼¤Î¾ì¹ç¡¢¤³¤ì¤é¤Î´Ø¿ô¤Ï¥¨¥é¡¼ÃͤòÊÖ¤·¡¢ *gbufp ¤Ï NULL ¤Ë¤Ê¤ë¡£

¥¨¥é¡¼

ENOENT
¼¡¤Î¥¨¥ó¥È¥ê¤¬¤Ê¤¤¡£
ERANGE
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½àµò

¤³¤ì¤é¤Î´Ø¿ô¤Ï GNU ³ÈÄ¥¤Ç¤¢¤ê¡¢POSIX ÈǤδؿô getpwnam_r(3) ¤Î·Á¼°¤Ë»÷¤»¤Æ¤¢¤ë¡£ ¾¤Î¥·¥¹¥Æ¥à¤Ç¤Ï°Ê²¼¤Î¥×¥í¥È¥¿¥¤¥×¤¬»È¤ï¤ì¤Æ¤¤¤ë¡£ 

struct group *

getgrent_r(struct group *grp, char *buf, int buflen);

¤è¤êÎɤ¤¤â¤Î¤Ç¤Ï¡¢°Ê²¼¤Î¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¡£


int

getgrent_r(struct group *grp, char *buf, int buflen,

           FILE **gr_fp);

Ãí°Õ

´Ø¿ô getgrent_r() ¤ÏËÜÅö¤Î¥ê¥¨¥ó¥È¥é¥ó¥È¤Ç¤Ï¤Ê¤¤¡£ ¤Ê¤¼¤Ê¤é¡¢¥¹¥È¥ê¡¼¥à¤ÎÆɤ߹þ¤ß°ÌÃÖ¤ò ¾¤ÎÁ´¤Æ¤Î¥¹¥ì¥Ã¥É¤È¶¦Í­¤·¤Æ¤¤¤ë¤¿¤á¤Ç¤¢¤ë¡£

Îã


#define _GNU_SOURCE

#include <grp.h>

#include <stdio.h>

#define BUFLEN 4096



int

main(void)

{

    struct group grp, *grpp;

    char buf[BUFLEN];

    int i;



    setgrent();

    while (1) {

        i = getgrent_r(&grp, buf, BUFLEN, &grpp);

        if (i)

            break;

        printf("%s (%d):", grpp->gr_name, grpp->gr_gid);

        for (i = 0; ; i++) {

            if (grpp->gr_mem[i] == NULL)

                break;

            printf(" %s", grpp->gr_mem[i]);

        }

        printf("\n");

    }

    endgrent();

    exit(EXIT_SUCCESS);

}

´ØÏ¢¹àÌÜ

fgetgrent(3), getgrent(3), getgrgid(3), getgrnam(3), putgrent(3), group(5), feature_test_macros(7)