Source : watch.c
파일(디렉토리) 의 create, modify, delete, move에 대해서 모니터링
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/inotify.h>
#define EVENT_SIZE ( sizeof (struct inotify_event) )
#define BUF_LEN ( 1024 * ( EVENT_SIZE + 16 ) )
int main( int argc, char **argv ) {
char target[20]; /* monitoring directory name */
int fd;
int wd; /* watch desc */
char buffer[BUF_LEN];
fd = inotify_init();
if (fd < 0) {
perror("inotify_init");
}
if (argc < 2) {
fprintf (stderr, "Watching the current directory\n");
strcpy (target, ".");
} else {
fprintf (stderr, "Watching '%s' directory\n", argv[1]);
strcpy (target, argv[1]);
}
wd = inotify_add_watch(fd, "/home1/knight", IN_MODIFY | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO | IN_MOVE_SELF);
while(1) {
int length, i = 0;
length = read(fd, buffer, BUF_LEN);
if (length < 0) {
perror("read");
}
while (i < length) {
struct inotify_event *event = (struct inotify_event *) &buffer[i];
printf ("[debug] wd=%d mask=%d cookie=%d len=%d dir=%s\n", event->wd, event->mask, event->cookie, event->len, (event->mask & IN_ISDIR)?"yes":"no");
if (event->len) {
if (event->mask & IN_CREATE) {
if (event->mask & IN_ISDIR) {
printf("The directory %s was created.\n", event->name);
} else {
printf("The file %s was created.\n", event->name);
}
} else if (event->mask & IN_DELETE) {
if (event->mask & IN_ISDIR) {
printf("The directory %s was deleted.\n", event->name);
} else {
printf("The file %s was deleted.\n", event->name);
}
} else if (event->mask & IN_MODIFY) {
if (event->mask & IN_ISDIR) {
printf("The directory %s was modified.\n", event->name);
} else {
printf("The file %s was modified.\n", event->name);
}
} else if (event->mask & IN_MOVED_FROM || event->mask & IN_MOVED_TO || event->mask & IN_MOVE_SELF) {
if (event->mask & IN_ISDIR) {
printf("The directory %s was moved.\n", event->name);
} else {
printf("The file %s was moved.\n", event->name);
}
}
}
i += EVENT_SIZE + event->len;
}
}
/*
inotify_rm_watch(fd, wd);
close(fd);
*/
return 0;
}
빌드 및 실행
[/home/knight] gcc -o watch.out watch.c
[/home/knight] ./watch.out
Watching the current directory
터미널 하나를 띄워서 테스트해본다.
[/home/knight] mkdir xx1
[/home/knight] mkdir xx2
[/home/knight] mv xx2 xx222
[/home/knight] rm -rf xx222
watch.out을 실행시켰던 터미널에서 결과를 확인한다.
./watch.out
Watching the current directory
[debug] wd=1 mask=1073742080 cookie=0 len=16 dir=yes
The directory xx1 was created.
[debug] wd=1 mask=1073742080 cookie=0 len=16 dir=yes
The directory xx2 was created.
[debug] wd=1 mask=1073741888 cookie=33508 len=16 dir=yes
The directory xx2 was moved.
[debug] wd=1 mask=1073741952 cookie=33508 len=16 dir=yes
The directory xx222 was moved.
[debug] wd=1 mask=1073742336 cookie=0 len=16 dir=yes
The directory xx222 was deleted.
괜찮은 Referneces
http://ko.wikipedia.org/wiki/Inotify
http://www.ibm.com/developerworks/kr/library/l-ubuntu-inotify/index.html
http://linux.die.net/man/7/inotify
http://darkeside.blogspot.com/2007/12/linux-inotify-example.html
Posted by 김용환 '김용환'
csh 스크립트를 정리하다가. 발견한 사실.. (이미 오래전에 적었을지도 모르지만.. ^^;;)
|
#!/bin/csh
wget -O serverStatusLog 'http://127.0.0.1/server-status?auto';
cat serverStatusLog | awk -F: '{ print $2 }' > statusCurrent
set current=(`cat statusCurrent`) |
csh에서의 ( ) 마크는 bash 에서는 다르게 해석한다고 말했는데..
csh에서는 개행문자뿐 아니라 사이띄기도 ( )를 이용하면 배열로 만들 수 있는데 반해서
bash에서는 오직 개행문자만 배열로 만들 수 있다.
만약 개행문자로 나눌 수 있는 값이면, 아래처럼 그래도 쓸 수 있다.
|
#!/bin/csh
wget -O serverStatusLog 'http://127.0.0.1/server-status?auto';
cat serverStatusLog | awk -F: '{ print $2 }' > nstatusCurrent
current=(`cat nstatusCurrent`) |
그러나, 스페이로 이루어질 때는 tr을 이용해서 배열로 만들면 된다.
|
#!/bin/csh
wget -O serverStatusLog 'http://127.0.0.1/server-status?auto';
cat serverStatusLog | awk -F: '{ print $2 }' > nstatusCurrent
current=`echo nstatusCurrent | tr ' ' ' '` |
Posted by 김용환 '김용환'
