notgne2/tuxpaint-pencil-sharpener
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added lockfile feature, to prevent multiple launches within 30 seconds

Browse source 
(due to over-clicking, for example).
This commit is contained in:
William Kendrick 2004-09-14 06:39:51 +00:00
parent 6752deb266
commit 00c5d44b96
5 changed files with 144 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

75
src/tuxpaint.c
View file

@ -21,12 +21,12 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
June 14, 2002 - September 4, 2004
June 14, 2002 - September 13, 2004
*/
#define VER_VERSION "0.9.14"
#define VER_DATE "2004-09-04"
#define VER_DATE "2004-09-13"
/* #define DEBUG */
@ -3746,7 +3746,7 @@ void show_usage(FILE * f, char * prg)
#endif
" %s [--printdelay=SECONDS]\n"
" %s [--lang LANGUAGE | --locale LOCALE | --lang help]\n"
" %s [--nosysconfig]\n"
" %s [--nosysconfig] [--nolockfile]\n"
/* " %s [--record FILE | --playback FILE]\n" */
"\n",
prg, prg,
@ -3903,7 +3903,7 @@ const char *getfilename(const char* path)
void setup(int argc, char * argv[])
{
int i, ok_to_use_sysconfig;
int i, ok_to_use_sysconfig, ok_to_use_lockfile;
char str[128];
char * upstr;
SDL_Color black = {0, 0, 0, 0};
@ -3961,6 +3961,7 @@ void setup(int argc, char * argv[])
playfile = NULL;
recording = 0;
playing = 0;
ok_to_use_lockfile = 1;
#ifdef __BEOS__
@ -3979,6 +3980,7 @@ void setup(int argc, char * argv[])
#endif
/* Load options from global config file: */
#ifndef WIN32
@ -4370,6 +4372,11 @@ void setup(int argc, char * argv[])
{
debug("Not using system config.");
}
else if (strcmp(argv[i], "--nolockfile") == 0)
{
debug("Not using lockfile");
ok_to_use_lockfile = 0;
}
else
{
show_usage(stderr, (char *) getfilename(argv[0]));
@ -4690,6 +4697,66 @@ void setup(int argc, char * argv[])
putenv("SDL_VIDEO_X11_WMCLASS=TuxPaint.TuxPaint");
#endif
/* Test for lockfile, if we're using one: */
if (ok_to_use_lockfile)
{
char * lock_fname;
FILE * fi;
time_t time_lock, time_now;
/* Get the current time: */
time_now = time(NULL);
/* Look for the lockfile... */
lock_fname = get_fname("lockfile.dat");
fi = fopen(lock_fname, "r");
if (fi != NULL)
{
/* If it exists, read its contents: */
if (fread(&time_lock, sizeof(time_t), 1, fi) > 0)
{
/* Has it not been 30 seconds yet? */
if (time_now < time_lock + 30)
{
/* FIXME: Wrap in gettext() */
printf("\nYou're already running a copy of Tux Paint!\n\n");
fclose(fi);
exit(0);
}
}
fclose(fi);
}
/* Okay to run; create/update the lockfile */
fi = fopen(lock_fname, "w");
if (fi != NULL)
{
/* If we can write to it, do so! */
fwrite(&time_now, sizeof(time_t), 1, fi);
fclose(fi);
}
else
{
fprintf(stderr,
"\nWarning: I couldn't create the lockfile (%s)\n"
"The error that occurred was:\n"
"%s\n\n", lock_fname, strerror(errno));
}
}
/* Init SDL Video: */