From 6e42ef0edaba59fd344e89ffd469202ff2bd39ac Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@fe.uni-lj.si>
Date: Tue, 15 Mar 2016 15:40:24 +0000
Subject: [PATCH] File locking into .lock seems to work fine
---
src/main.c | 4 ++++
src/general.c | 14 +++++++-------
2 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/src/general.c b/src/general.c
index 68b0611..9782e47 100644
--- a/src/general.c
+++ b/src/general.c
@@ -61,7 +61,7 @@
fd = open(pidFile, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
if (fd == -1){
ts_fprintf(stderr,"Could not open PID file %s", pidFile);
- fatal("Cannot continue",1);
+ fatal("Cannot continue (1)",1);
}
if (flags & CPF_CLOEXEC) {
@@ -75,13 +75,13 @@
flags = fcntl(fd, F_GETFD); /* Fetch flags */
if (flags == -1){
ts_fprintf(stderr,"Could not get flags for PID file %s", pidFile);
- fatal("Cannot continue",1);
+ fatal("Cannot continue (2)",1);
}
flags |= FD_CLOEXEC; /* Turn on FD_CLOEXEC */
if (fcntl(fd, F_SETFD, flags) == -1) /* Update flags */
ts_fprintf(stderr,"Could not set flags for PID file %s", pidFile);
- fatal("Cannot continue",1);
+ fatal("Cannot continue (3)",1);
}
@@ -89,24 +89,24 @@
if (errno == EAGAIN || errno == EACCES){
ts_fprintf(stderr,"PID file '%s' is locked; probably "
"'%s' is already running", pidFile, progName);
- fatal("Cannot continue",1);
+ fatal("Cannot continue (4)",1);
}
else{
ts_fprintf(stderr,"Unable to lock PID file '%s'", pidFile);
- fatal("Cannot continue",1);
+ fatal("Cannot continue (5)",1);
}
}
if (ftruncate(fd, 0) == -1){
ts_fprintf(stderr,"Could not truncate PID file '%s'", pidFile);
- fatal("Cannot continue",1);
+ fatal("Cannot continue (6)",1);
}
snprintf(buf, BUF_SIZE, "%ld\n", (long) getpid());
if (write(fd, buf, strlen(buf)) != strlen(buf)){
ts_fprintf(stderr,"Writing to PID file '%s'", pidFile);
- fatal("Cannot continue",1);
+ fatal("Cannot continue (7)",1);
}
return fd;
}
diff --git a/src/main.c b/src/main.c
index 8cf3e92..e4b306f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -17,6 +17,8 @@
#include "shcomplex.h"
#include "dumpstate.h"
#include "restore.h"
+
+#include <fcntl.h>
/** Entrance function to the program
* @param argv is a number of parameters used in program call (including the program name
* @param argc is a pointer to strings (character arrays) which holds the arguments
@@ -28,6 +30,8 @@
ts_tape *tape;
ts_uint start_iteration=0;
force_from_tape=0;
+ /* create lock file */
+ createPidFile("ts_trisurf",".lock",0);
parse_args(argv,argc); // sets global variable command_line_args (defined in io.h)
ts_fprintf(stdout,"TRISURF-NG v. %s, compiled on: %s %s.\n", TS_VERSION, __DATE__, __TIME__);
ts_fprintf(stdout,"Programming done by: Samo Penic and Miha Fosnaric\n");
--
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