tests/getgroups.c

ソースコードを見る。

関数
	main ()

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関数

main

(

void

)

getgroups.c の 19 行で定義されています。

参照先 fprintf()・printf().

{
        int i;
        int *igroups;
        char *cgroups;
        int grp = 0;
        int  ngroups = getgroups(0,&grp);

        if (sizeof(gid_t) == sizeof(int)) {
                fprintf(stderr,"gid_t and int are the same size\n");
                exit(1);
        }

        if (ngroups <= 0)
                ngroups = 32;

        igroups = (int *)malloc(sizeof(int)*ngroups);

        for (i=0;i<ngroups;i++)
                igroups[i] = 0x42424242;

        ngroups = getgroups(ngroups,(gid_t *)igroups);

        if (igroups[0] == 0x42424242)
                ngroups = 0;

        if (ngroups == 0) {
                printf("WARNING: can't determine getgroups return type\n");
                exit(1);
        }
        
        cgroups = (char *)igroups;

        if (ngroups == 1 && 
            cgroups[2] == 0x42 && cgroups[3] == 0x42) {
                fprintf(stderr,"getgroups returns gid_t\n");
                exit(1);
        }
          
        for (i=0;i<ngroups;i++) {
                if (igroups[i] == 0x42424242) {
                        fprintf(stderr,"getgroups returns gid_t\n");
                        exit(1);
                }
        }

        exit(0);
}

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