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Sourcecode: samba-doc-ja version File versions

initgroups.c

#include <stdio.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#include <sys/types.h>

int main(int argc, char **argv)
{
      int result, ngroups, i;
      gid_t *groups;
      struct passwd *pw;

      if (!(pw = getpwnam(argv[1]))) {
            printf("FAIL: no passwd entry for %s\n", argv[1]);
            return 1;
      }

      result = initgroups(argv[1], pw->pw_gid);

      if (result == -1) {
            printf("FAIL");
            return 1;
      }

      ngroups = getgroups(0, NULL);

      groups = (gid_t *)malloc(sizeof(gid_t) * ngroups);
      ngroups = getgroups(ngroups, groups);

      printf("%s is a member of groups:\n", argv[1]);

      for (i = 0; i < ngroups; i++) {
            struct group *grp;

            grp = getgrgid(groups[i]);

            printf("%d (%s)\n", groups[i], grp ? grp->gr_name : "?");
      }

      printf("PASS\n");
      return 0;
}

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