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use getopt.h to parse command line options

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This commit is contained in:
Mathias Panzenböck
2014-02-15 06:44:43 +01:00
parent 5fef530aa0
commit 5da7e859f4
1 changed files with 81 additions and 49 deletions
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130
src/main.cpp
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@ -20,9 +20,10 @@
#include <QSystemTrayIcon> #include <QSystemTrayIcon>
#include <poll.h> #include <poll.h>
#include <cstdlib> #include <cstdlib>
#include <getopt.h>
//for making universally available variables //for making universally available variables
QHash<int, JoyPad*> available; //to device.h QHash<int, JoyPad*> available; //to device.h
QHash<int, JoyPad*> joypads; //to device.h QHash<int, JoyPad*> joypads; //to device.h
//variables needed in various functions in this file //variables needed in various functions in this file
@ -53,8 +54,8 @@ void catchSIGUSR1( int sig ) {
/* A new feature to add? We'll see. /* A new feature to add? We'll see.
void catchSIGUSR2( int sig ) { void catchSIGUSR2( int sig ) {
lm->trayClick(); lm->trayClick();
signal( sig, catchSIGUSR2 ); signal( sig, catchSIGUSR2 );
} }
*/ */
@ -79,7 +80,7 @@ int main( int argc, char **argv )
//start out with no special layout. //start out with no special layout.
QString layout = ""; QString layout;
//by default, we use a tray icon //by default, we use a tray icon
bool useTrayIcon = true; bool useTrayIcon = true;
//this execution wasn't made to update the joystick device list. //this execution wasn't made to update the joystick device list.
@ -87,56 +88,86 @@ int main( int argc, char **argv )
bool forceTrayIcon = false; bool forceTrayIcon = false;
//parse command-line options //parse command-line options
for (int i = 1; i < a.argc(); i++) { struct option long_options[] = {
//if a device directory was specified, {"help", no_argument, 0, 'h'},
if (QRegExp("-{1,2}device").exactMatch(a.argv()[i])) { {"device", required_argument, 0, 'd'},
++i; {"force-tray", no_argument, 0, 't'},
if (i < a.argc()) { {"notray", no_argument, 0, 'T'},
if (QFile::exists(a.argv()[i])) { {"update", no_argument, 0, 'u'},
devdir = a.argv()[i]; {0, 0, 0, 0 }
};
for (;;) {
int c = getopt_long(argc, argv, "hd:tTu", long_options, NULL);
if (c == -1)
break;
switch (c) {
case 'h':
printf("%s\n"
"Usage: %s [--device=\"/device/path\"] [--notray|--force-tray] [\"layout name\"]\n"
"\n"
"Options:\n"
" -h, --help Print this help message.\n"
" -d, --device=PATH Look for joystick devices in PATH. This should\n"
" be something like \"/dev/input\" if your game\n"
" devices are in /dev/input/js0, /dev/input/js1, etc.\n"
" -t, --force-tray Forece to use a system tray icon.\n"
" -T, --notray Do not use a system tray icon. This is useful for\n"
" window managers that don't support this feature.\n"
" -u, --update Force a running instance of QJoyPad to update its\n"
" list of devices and layouts.\n"
" \"layout name\" Load the given layout in an already running\n"
" instance of QJoyPad, or start QJoyPad using the\n"
" given layout.\n", NAME, argc > 0 ? argv[0] : "qjoypad");
return 0;
case 'd':
if (QFile::exists(optarg)) {
devdir = optarg;
} }
else { else {
error("Command Line Argument Problems", "No such directory: " + QString(a.argv()[i])); fprintf(stderr, "No such file or directory: %s\n", optarg);
continue; return 1;
} }
} break;
case 'T':
useTrayIcon = false;
break;
case 't':
useTrayIcon = true;
forceTrayIcon = true;
break;
case 'u':
update = true;
break;
case '?':
fprintf(stderr,
"See `%s --help` for more information\n",
argc > 0 ? argv[0] : "qjoypad");
return 1;
} }
//if no-tray mode was requested, }
else if (QRegExp("-{1,2}notray").exactMatch(a.argv()[i])) {
useTrayIcon = false; if (optind < argc) {
} layout = argv[optind ++];
//if this execution is just meant to update the joystick devices,
else if (QRegExp("-{1,2}update").exactMatch(a.argv()[i])) { if (optind < argc) {
update = true; fprintf(stderr,
} "Too many arguments.\n"
//if help was requested, "See `%s --help` for more information\n",
else if (QRegExp("-{1,2}h(elp)?").exactMatch(a.argv()[i])) { argc > 0 ? argv[0] : "qjoypad");
printf("%s\n"
"Usage: qjoypad [--device \"/device/path\"] [--notray] [\"layout name\"]\n"
"\n"
"Options:\n"
" --device path Look for joystick devices in \"path\". This should\n"
" be something like \"/dev/input\" if your game\n"
" devices are in /dev/input/js0, /dev/input/js1, etc.\n"
" --notray Do not use a system tray icon. This is useful for\n"
" window managers that don't support this feature.\n"
" --update Force a running instance of QJoyPad to update its\n"
" list of devices and layouts.\n"
" \"layout name\" Load the given layout in an already running\n"
" instance of QJoyPad, or start QJoyPad using the\n"
" given layout.\n", NAME);
return 1; return 1;
} else if(QRegExp("--force-tray").exactMatch(a.argv()[i])) {
useTrayIcon = true;
forceTrayIcon = true;
} }
//in all other cases, an argument is assumed to be a layout name.
//note: only the last layout name given will be used.
else layout = a.argv()[i];
} }
//if the user specified a layout to use, //if the user specified a layout to use,
if (layout != "") if (!layout.isEmpty())
{ {
//then we try to store that layout in the last-used layout spot, to be //then we try to store that layout in the last-used layout spot, to be
//loaded by default. //loaded by default.
@ -170,12 +201,13 @@ int main( int argc, char **argv )
//then prevent two instances from running at once. //then prevent two instances from running at once.
//however, if we are setting the layout or updating the device //however, if we are setting the layout or updating the device
//list, this is not an error and we shouldn't make one! //list, this is not an error and we shouldn't make one!
if (layout == "" && update == false) error("Instance Error","There is already a running instance of QJoyPad; please close\nthe old instance before starting a new one."); if (layout.isEmpty() && update == false)
else { error("Instance Error","There is already a running instance of QJoyPad; please close\nthe old instance before starting a new one.");
else {
//if one of these is the case, send the approrpriate signal! //if one of these is the case, send the approrpriate signal!
if (update == true) if (update == true)
kill(pid,SIGUSR1); kill(pid,SIGUSR1);
if (layout != "") if (!layout.isEmpty())
kill(pid,SIGIO); kill(pid,SIGIO);
} }
//and quit. We don't need two instances. //and quit. We don't need two instances.
@ -218,7 +250,7 @@ int main( int argc, char **argv )
//prepare the signal handlers //prepare the signal handlers
signal( SIGIO, catchSIGIO ); signal( SIGIO, catchSIGIO );
signal( SIGUSR1, catchSIGUSR1 ); signal( SIGUSR1, catchSIGUSR1 );
// signal( SIGUSR2, catchSIGUSR2 ); // signal( SIGUSR2, catchSIGUSR2 );
//and run the program! //and run the program!
int result = a.exec(); int result = a.exec();