getgrouplist

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Version: 2003-11-18 (openSuse - 09/10/07)

Section: 3 (Bibliothèques de fonctions)

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getgrouplist - ¥æ¡¼¥¶¤¬½ê°¤¹¤ë¥°¥ë¡¼¥×¤Î¥ê¥¹¥È

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#include <grp.h>

int getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups);

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¸«¤Ä¤«¤Ã¤¿Á´¤Æ¤Î¥°¥ë¡¼¥×¤Î¿ô¤è¤ê *ngroups ¤¬¾®¤µ¤¤¾ì¹ç¡¢ getgrouplist() ¤ÏÃÍ `-1' ¤òÊÖ¤¹¡£ À®¸ù¤·¤¿¾ì¹ç¤â¡¢¼ºÇÔ¤·¤¿¾ì¹ç¤â¡¢¼ÂºÝ¤Î¥°¥ë¡¼¥×¤Î¿ô¤¬ *ngroups ¤Ë³ÊǼ¤µ¤ì¤ë¡£

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¤³¤Î´Ø¿ô¤Ï glibc 2.2.4 ¤«¤é¸ºß¤¹¤ë¡£

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¤³¤Î´Ø¿ô¤Î glibc 2.3.2 ¤Ç¤Î¼ÂÁõ¤Ï´Ö°ã¤¨¤Æ¤¤¤ë: ¼ÂºÝ¤Î¥°¥ë¡¼¥×¤Î¿ô¤¬ *ngroups ¤è¤êÂ礭¤¤¾ì¹ç¡¢¥á¥â¥ê¤ò¾å½ñ¤­¤·¤Æ¤·¤Þ¤¦¡£

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/* ¤³¤ì¤Ï glibc 2.3.2 ¤Ç¤Ï¥¯¥é¥Ã¥·¥å¤¹¤ë¡£*/

#include <stdio.h>

#include <stdlib.h>

#include <grp.h>

#include <pwd.h>



int

main(void)

{

    int i, ng = 0;

    char *user = "who";       /* ¥æ¡¼¥¶Ì¾¤ò¤³¤³¤Ë½ñ¤¯¡£ */

    gid_t *groups = NULL;

    struct passwd *pw = getpwnam(user);



    if (pw == NULL)

        exit(EXIT_SUCCESS);



    if (getgrouplist(user, pw->pw_gid, NULL, &ng) < 0) {

        groups = (gid_t *) malloc(ng * sizeof (gid_t));

        getgrouplist(user, pw->pw_gid, groups, &ng);

    }



    for(i = 0; i < ng; i++)

        printf("%d\n", groups[i]);



    exit(EXIT_SUCCESS);

}

´ØÏ¢¹àÌÜ

getgroups(3), setgroups(3)