scripts/trunk/uncache.c

/* This program removes specified (or current) directory/file from Linux filesystem cache */
#define _GNU_SOURCE
#define _XOPEN_SOURCE 600

#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <fts.h>
#include <fcntl.h>

int main(int ac, char ** av) {
        FTS * tree;
        FTSENT * node;
        
        char **paths = malloc(ac*sizeof(char*));
        memcpy(paths,av+1,(ac-1)*sizeof(char*));
        paths[ac]=NULL;
        if (ac<2) paths[0]=getcwd(NULL,0);

        tree=fts_open(paths,FTS_LOGICAL|FTS_NOCHDIR,NULL);
        while((node=fts_read(tree))) {
                int fd;
                if (node->fts_info != FTS_F) continue;
                fd=open(node->fts_path,O_DIRECT);
                posix_fadvise(fd,0,0,POSIX_FADV_DONTNEED);
                close(fd);
        }
        fts_close(tree);
        if (ac<2) free(paths[0]);
        free(paths);
        return(0);
}

1	dpavlin	142	/* This program removes specified (or current) directory/file from Linux filesystem cache */
2			#define _GNU_SOURCE
3			#define _XOPEN_SOURCE 600
4
5			#include <unistd.h>
6			#include <stdlib.h>
7			#include <string.h>
8			#include <stdio.h>
9			#include <fts.h>
10			#include <fcntl.h>
11
12			int main(int ac, char ** av) {
13			FTS * tree;
14			FTSENT * node;
15
16			char *paths = malloc(acsizeof(char*));
17			memcpy(paths,av+1,(ac-1)sizeof(char));
18			paths[ac]=NULL;
19			if (ac<2) paths[0]=getcwd(NULL,0);
20
21			tree=fts_open(paths,FTS_LOGICAL\|FTS_NOCHDIR,NULL);
22			while((node=fts_read(tree))) {
23			int fd;
24			if (node->fts_info != FTS_F) continue;
25			fd=open(node->fts_path,O_DIRECT);
26			posix_fadvise(fd,0,0,POSIX_FADV_DONTNEED);
27			close(fd);
28			}
29			fts_close(tree);
30			if (ac<2) free(paths[0]);
31			free(paths);
32			return(0);
33			}
34