diff options
Diffstat (limited to 'chkspawn.c')
-rw-r--r-- | chkspawn.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/chkspawn.c b/chkspawn.c new file mode 100644 index 0000000..d19259e --- /dev/null +++ b/chkspawn.c @@ -0,0 +1,48 @@ +#include "substdio.h" +#include "subfd.h" +#include "fmt.h" +#include "select.h" +#include "exit.h" +#include "auto_spawn.h" + +char num[FMT_ULONG]; +fd_set fds; + +void main() +{ + unsigned long hiddenlimit; + unsigned long maxnumd; + + hiddenlimit = sizeof(fds) * 8; + maxnumd = (hiddenlimit - 5) / 2; + + if (auto_spawn < 1) { + substdio_puts(subfderr,"Oops. You have set conf-spawn lower than 1.\n"); + substdio_flush(subfderr); + _exit(1); + } + + if (auto_spawn > 255) { + substdio_puts(subfderr,"Oops. You have set conf-spawn higher than 255.\n"); + substdio_flush(subfderr); + _exit(1); + } + + if (auto_spawn > maxnumd) { + substdio_puts(subfderr,"Oops. Your system's FD_SET() has a hidden limit of "); + substdio_put(subfderr,num,fmt_ulong(num,hiddenlimit)); + substdio_puts(subfderr," descriptors.\n\ +This means that the qmail daemons could crash if you set the run-time\n\ +concurrency higher than "); + substdio_put(subfderr,num,fmt_ulong(num,maxnumd)); + substdio_puts(subfderr,". So I'm going to insist that the concurrency\n\ +limit in conf-spawn be at most "); + substdio_put(subfderr,num,fmt_ulong(num,maxnumd)); + substdio_puts(subfderr,". Right now it's "); + substdio_put(subfderr,num,fmt_ulong(num,(unsigned long) auto_spawn)); + substdio_puts(subfderr,".\n"); + substdio_flush(subfderr); + _exit(1); + } + _exit(0); +} |