dzwdz
/
catboy
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Exclusively lock save file 

Prevents two instances of catgirl from using the same save file and
clobbering each other's data.
master
C. McEnroe 2021-06-11 21:09:46 -04:00
parent c6009cf13c
commit f6e8078c46
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
ui.c
View File

@ -32,6 +32,7 @@
#include <curses.h> #include <curses.h>
#include <err.h> #include <err.h>
#include <errno.h> #include <errno.h>
#include <fcntl.h>
#include <limits.h> #include <limits.h>
#include <signal.h> #include <signal.h>
#include <stdarg.h> #include <stdarg.h>
@ -1183,6 +1184,11 @@ void uiLoad(const char *name) {
if (!saveFile) exit(EX_CANTCREAT); if (!saveFile) exit(EX_CANTCREAT);
rewind(saveFile); rewind(saveFile);
int error = flock(fileno(saveFile), LOCK_EX | LOCK_NB);
if (error && errno == EWOULDBLOCK) {
errx(EX_CANTCREAT, "%s: save file in use", name);
}
time_t signature; time_t signature;
fread(&signature, sizeof(signature), 1, saveFile); fread(&signature, sizeof(signature), 1, saveFile);
if (ferror(saveFile)) err(EX_IOERR, "fread"); if (ferror(saveFile)) err(EX_IOERR, "fread");