*
* Author: S. Piccardi Jan. 2003
*
- * $Id: DirMonitor.c,v 1.5 2003/01/12 00:24:28 piccardi Exp $
- *
*****************************************************************************/
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h> /* directory */
-#include <stdlib.h> /* C standard library */
-#include <unistd.h>
+#include <sys/types.h> /* primitive system data types */
+#include <sys/stat.h> /* file characteristics constants and functions */
+#include <dirent.h> /* directory operation constants and functions */
+#include <stdlib.h> /* C standard library */
+#include <unistd.h> /* unix standard library */
+#include <string.h> /* C strings library */
#include "Gapil.h"
#include "macros.h"
/* Help printing routine */
void usage(void);
-/* computation function for DirScan */
+/* computation function for dir_scan */
int ComputeValues(struct dirent * direntry);
void HandSIGTERM(int signo);
int tot_char;
int tot_sock;
} *shmptr;
-int shmid;
+key_t key;
int mutex;
int main(int argc, char *argv[])
{
int i, pause = 10;
- key_t key;
/*
* Input section: decode command line parameters
* Use getopt function
Signal(SIGINT, HandSIGTERM);
Signal(SIGQUIT, HandSIGTERM);
key = ftok("~/gapil/sources/DirMonitor.c", 1); /* define a key, use dir */
- shmid = shmget(key, 4096, IPC_CREAT|0666); /* get a shared memory */
- if (shmid < 0) {
+ shmptr = ShmCreate(key, 4096, 0666, 0); /* get a shared memory segment */
+ if (!shmptr) {
perror("Cannot create shared memory");
exit(1);
}
- if ( (shmptr = shmat(shmid, NULL, 0)) == NULL ) { /* attach to process */
- perror("Cannot attach segment");
- exit(1);
- }
if ((mutex = MutexCreate(key)) == -1) { /* get a Mutex */
perror("Cannot create mutex");
exit(1);
while (1) {
MutexLock(mutex); /* lock shared memory */
memset(shmptr, 0, sizeof(struct DirProp)); /* erase previous data */
- DirScan(argv[1], ComputeValues); /* execute scan */
+ dir_scan(argv[1], ComputeValues); /* execute scan */
MutexUnlock(mutex); /* unlock shared memory */
sleep(pause); /* sleep until next watch */
}
}
/*
- * Routine to compute directory properties inside DirScan
+ * Routine to compute directory properties inside dir_scan
*/
int ComputeValues(struct dirent * direntry)
{
void HandSIGTERM(int signo) {
MutexLock(mutex);
debug("Terminated by %s\n", strsignal(signo));
- if (shmdt(shmptr)) {
- perror("Error detaching shared memory");
- exit(1);
- }
- if (shmctl(shmid, IPC_RMID, NULL)) {
- perror("Cannot remove shared memory segment");
- exit(1);
- }
+ ShmRemove(key, shmptr);
MutexRemove(mutex);
exit(0);
}