chkspawn.c

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#include "buffer.h"
#include "fmt.h"
#include "select.h"
#include "exit.h"
#include "auto_spawn.h"
#define MAXSPAWN 1000    /* Silent spawn limit increased to 1000 */
 
char num[FMT_ULONG];
fd_set fds;
 
int main()
{
  unsigned long hiddenlimit;
  unsigned long maxnumd;
 
  hiddenlimit = sizeof(fds) * 8;
  maxnumd = (hiddenlimit - 5) / 2;
 
  if (auto_spawn < 1) {
    buffer_puts(buffer_2,"Oops. You have set conf-spawn lower than 1.\n");
    buffer_flush(buffer_2);
    _exit(1);
  }
 
  if (auto_spawn > MAXSPAWN) {
    buffer_puts(buffer_2,"Oops. You have set conf-spawn higher than MAXSPAWN.\n");
    buffer_flush(buffer_2);
    _exit(1);
  }
 
  if (auto_spawn > maxnumd) {
    buffer_puts(buffer_2,"Oops. Your system's FD_SET() has a hidden limit of ");
    buffer_put(buffer_2,num,fmt_ulong(num,hiddenlimit));
    buffer_puts(buffer_2," descriptors.\n\
This means that the qmail daemons could crash if you set the run-time\n\
concurrency higher than ");
    buffer_put(buffer_2,num,fmt_ulong(num,maxnumd));
    buffer_puts(buffer_2,". So I'm going to insist that the concurrency\n\
limit in conf-spawn be at most ");
    buffer_put(buffer_2,num,fmt_ulong(num,maxnumd));
    buffer_puts(buffer_2,". Right now it's ");
    buffer_put(buffer_2,num,fmt_ulong(num,(unsigned long) auto_spawn));
    buffer_puts(buffer_2,".\n");
    buffer_flush(buffer_2);
    _exit(1);
  }
  _exit(0);
}