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/*
* Lookup a group by gid.
*/
#include <stdio.h>
#include <grp.h>
#include <sys/types.h>
int main(int argc, char **argv)
{
struct group *gr;
gid_t gid;
/* Check args */
if (argc != 2) {
printf("ERROR: no arg specified\n");
exit(1);
}
if ((gid = atoi(argv[1])) == 0) {
printf("ERROR: invalid gid specified\n");
exit(1);
}
/* Do getgrgid() */
if ((gr = getgrgid(gid)) == NULL) {
printf("FAIL: gid %d does not exist\n", gid);
exit(1);
}
/* Print group info */
printf("PASS: gid %d exists\n", gid);
printf("gr_name = %s\n", gr->gr_name);
printf("gr_passwd = %s\n", gr->gr_passwd);
printf("gr_gid = %d\n", gr->gr_gid);
/* Group membership */
if (gr->gr_mem != NULL) {
int i = 0;
printf("gr_mem = ");
while(gr->gr_mem[i] != NULL) {
printf("%s", gr->gr_mem[i]);
i++;
if (gr->gr_mem != NULL) {
printf(",");
}
}
printf("\n");
}
exit(0);
}
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