src/auto-gid.c


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

#include "buffer.h"
#include "exit.h"
#include "fmt.h"
#include "scan.h"

char inbuf[256];
buffer b = BUFFER_INIT(write, 1, inbuf, sizeof(inbuf));

void outs(char *s)
{
  if (buffer_puts(&b, s) == -1) _exit(111);
}

int main(int argc, char **argv)
{
  char *name;
  char *value;
  struct group *gr;
  char strnum[FMT_ULONG];

  name = argv[1];
  if (!name) _exit(100);
  value = argv[2];
  if (!value) _exit(100);

  gr = getgrnam(value);
  if (!gr) {
    buffer_puts(buffer_2, "fatal: unable to find group ");
    buffer_puts(buffer_2, value);
    buffer_puts(buffer_2, "\n");
    buffer_flush(buffer_2);
    _exit(111);
  }

  strnum[fmt_ulong(strnum, (unsigned long)gr->gr_gid)] = 0;

  outs("int ");
  outs(name);
  outs(" = ");
  outs(strnum);
  outs(";\n");
  if (buffer_flush(&b) == -1) _exit(111);
  _exit(0);
}