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tools/dirtpan/dirtpan.c: new option -b to background/daemonize

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- dirtpan.c (usage): added detailed description of the arguments
- dirtpan.c (usage, main): new option -b to daemonize after initialization
This commit is contained in:
Werner Almesberger 2011-05-18 14:07:05 -03:00
parent f5b1693a0c
commit 81a8e138c7
1 changed files with 17 additions and 4 deletions
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21
tools/dirtpan/dirtpan.c
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@ -533,7 +533,14 @@ static int open_tun(const char *cmd)
static void usage(const char *name)
{
fprintf(stderr,
"usage: %s [-d [-d]] pan_id src_addr dst_addr [command]\n"
"usage: %s [-b] [-d [-d]] pan_id src_addr dst_addr [command]\n\n"
" pan_id PAN (network) identifier\n"
" src_addr source short address\n"
" dst_addr destination short address\n"
" command configuration command to run after creating the TUN interface.\n"
" The environment variable $ITF is set to the interface name.\n\n"
" -b background the process after initialization\n"
" -d ... increase verbosity of debug output\n"
, name);
exit(1);
}
@ -557,10 +564,14 @@ int main(int argc, char **argv)
{
const char *cmd = NULL;
uint16_t pan, src, dst;
int foreground = 1;
int c;
while ((c = getopt(argc, argv, "d")) != EOF)
while ((c = getopt(argc, argv, "bd")) != EOF)
switch (c) {
case 'b':
foreground = 0;
break;
case 'd':
debug++;
break;
@ -583,8 +594,10 @@ int main(int argc, char **argv)
net = open_net(pan, src, dst);
tun = open_tun(cmd);
while (1)
event();
if (foreground || !daemonize())
while (1)
event();
return 0;
}