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-d switch for daemonizing on Unix

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This commit is contained in:
Adam Ierymenko 2014-03-03 11:53:43 -08:00
parent cef750d1d2
commit bae9fa1480
1 changed files with 26 additions and 3 deletions
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29
main.cpp
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@ -95,6 +95,9 @@ static void printHelp(const char *cn,FILE *out)
fprintf(out," -v - Show version"ZT_EOL_S); fprintf(out," -v - Show version"ZT_EOL_S);
fprintf(out," -p<port> - Bind to this port for network I/O"ZT_EOL_S); fprintf(out," -p<port> - Bind to this port for network I/O"ZT_EOL_S);
fprintf(out," -c<port> - Bind to this port for local control packets"ZT_EOL_S); fprintf(out," -c<port> - Bind to this port for local control packets"ZT_EOL_S);
#ifdef __UNIX_LIKE__
fprintf(out," -d - Fork and run as daemon (Unix-ish OSes)"ZT_EOL_S);
#endif
fprintf(out," -q - Send a query to a running service (zerotier-cli)"ZT_EOL_S); fprintf(out," -q - Send a query to a running service (zerotier-cli)"ZT_EOL_S);
fprintf(out," -i - Run idtool command (zerotier-idtool)"ZT_EOL_S); fprintf(out," -i - Run idtool command (zerotier-idtool)"ZT_EOL_S);
#ifdef __WINDOWS__ #ifdef __WINDOWS__
@ -520,6 +523,9 @@ int main(int argc,char **argv)
const char *homeDir = (const char *)0; const char *homeDir = (const char *)0;
unsigned int port = 0; unsigned int port = 0;
unsigned int controlPort = 0; unsigned int controlPort = 0;
#ifdef __UNIX_LIKE__
bool runAsDaemon = false;
#endif
#ifdef __WINDOWS__ #ifdef __WINDOWS__
bool winRunFromCommandLine = false; bool winRunFromCommandLine = false;
#endif #endif
@ -533,6 +539,11 @@ int main(int argc,char **argv)
return 1; return 1;
} }
break; break;
#ifdef __UNIX_LIKE__
case 'd':
runAsDaemon = true;
break;
#endif
case 'v': case 'v':
printf("%s"ZT_EOL_S,Node::versionString()); printf("%s"ZT_EOL_S,Node::versionString());
return 0; return 0;
@ -617,11 +628,23 @@ int main(int argc,char **argv)
homeDir = ZT_DEFAULTS.defaultHomePath.c_str(); homeDir = ZT_DEFAULTS.defaultHomePath.c_str();
#ifdef __UNIX_LIKE__ #ifdef __UNIX_LIKE__
if (getuid()) { if (getuid() != 0) {
fprintf(stderr,"%s: must be run as root (uid==0)\n",argv[0]); fprintf(stderr,"%s: must be run as root (uid 0)\n",argv[0]);
return 1; return 1;
} }
mkdir(homeDir,0755); // will fail if it already exists
if (runAsDaemon) {
long p = (long)fork();
if (p < 0) {
fprintf(stderr,"%s: could not fork"ZT_EOL_S,argv[0]);
return 1;
} else if (p > 0)
return 0; // forked
// else p == 0, so we are daemonized
}
mkdir(homeDir,0755); // will fail if it already exists, but that's fine
{ {
// Write .pid file to home folder // Write .pid file to home folder
char pidpath[4096]; char pidpath[4096];