third_party/ulib/musl/src/passwd/putgrent.c

#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:%d:", 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;
}