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#define _GNU_SOURCE
#include <grp.h>
#include <stdio.h>
int putgrent(const struct group *gr, FILE *f)
{
int r;
size_t i;
flockfile(f);
if ((r = fprintf(f, "%s:%s:%u:", gr->gr_name, gr->gr_passwd, gr->gr_gid))<0) goto done;
if (gr->gr_mem) for (i=0; gr->gr_mem[i]; i++)
if ((r = fprintf(f, "%s%s", i?",":"", gr->gr_mem[i]))<0) goto done;
r = fputc('\n', f);
done:
funlockfile(f);
return r<0 ? -1 : 0;
}
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