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/************************************************************************
* fspy - experimental POC linux filesystem activity monitor *
* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ *
* it's based on the new linux kernel inotify interface (merged into *
* the 2.6.13 linux kernel) *
* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ *
* this code was tested on 2.6.18.4 and newer kernels *
************************************************************************
* Copyright (C) 2007 Richard Sammet (e-axe) *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* http://www.gnu.org/licenses/gpl.txt *
************************************************************************
* Contact, Bugs & Infos: *
* richard.sammet@gmail.com *
************************************************************************
* Some infos: *
* - tabstop size: *
* set ts=2 *
************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/inotify.h>
#include "fspy.h"
#include "output.h"
#include "fsevents.h"
#include "stating.h"
/* the base of allowed diffable fields */
/* do not forget to modify this list as needed! */
char dbasewhitelist[] = "sAMSOUGID";
/* holds the fields to be printed colored */
struct diffprint dprint;
/* holds all the needed data to perform a diff */
struct festat *felsptr;
/* global diffing element counter */
unsigned int delc_oa = 0;
struct festat *init_diff(void) {
dprint.s = dprint.A = dprint.M = dprint.S = dprint.O = dprint.U = dprint.G = dprint.G = dprint.I = dprint.D = 0;
if((felsptr = (struct festat *) malloc(DIFF_ELEMENT_INIT_COUNT * sizeof(struct festat))) == NULL) {
fprintf(stderr, "ERROR: could not allocate mem for initial festat list!\n");
exit(EXIT_FAILURE);
}
#ifdef _DEBUG
printf("INIT_FESTAT_LIST: %i\n", DIFF_ELEMENT_INIT_COUNT);
#endif
return felsptr;
}
struct festat *extend_diff_list(struct festat *felsptr) {
if((felsptr = (struct festat *) realloc(felsptr, (delc_oa + DIFF_ELEMENT_INIT_COUNT) * sizeof(struct festat))) == NULL) {
fprintf(stderr, "ERROR: could not reallocate mem to extend dir list!\n");
exit(EXIT_FAILURE);
}
#ifdef _DEBUG
printf("EXTEND_DIFF_LIST: %i (%i)\n", delc_oa + DIFF_ELEMENT_INIT_COUNT, (delc_oa + DIFF_ELEMENT_INIT_COUNT) * sizeof(struct festat));
#endif
return felsptr;
}
void diffing(char *fpath, struct stat *statdat, struct diffprint *dprintptr, char *diffstring) {
char *mystrin_tmp;
char *mystr;
char mychar;
char *freeme;
unsigned int i, id;
#ifdef _DEBUG
printf("DIFFING: %s\n", fpath);
#endif
/* getting the element id */
for(i=0; i <= delc_oa; i++) {
if(strcmp(felsptr[i].path, fpath) == 0) {
id = felsptr[i].id;
break;
}
}
mystrin_tmp = strdup(diffstring);
while((mystr = strtok(mystrin_tmp, DELIM))) {
if(strlen(mystr) == 1) {
mychar = mystr[0];
switch(mychar) {
case 's': if(memcmp(&felsptr[i].statdat.st_size, &statdat->st_size, sizeof(off_t))) {
dprintptr->s = 1;
memcpy(&felsptr[i].statdat.st_size, &statdat->st_size, sizeof(off_t));
}
break;
case 'A': if(memcmp(&felsptr[i].statdat.st_atime, &statdat->st_atime, sizeof(time_t))) {
dprintptr->A = 1;
memcpy(&felsptr[i].statdat.st_atime, &statdat->st_atime, sizeof(time_t));
}
break;
case 'M': if(memcmp(&felsptr[i].statdat.st_mtime, &statdat->st_mtime, sizeof(time_t))) {
dprintptr->M = 1;
memcpy(&felsptr[i].statdat.st_mtime, &statdat->st_mtime, sizeof(time_t));
}
break;
case 'S': if(memcmp(&felsptr[i].statdat.st_ctime, &statdat->st_ctime, sizeof(time_t))) {
dprintptr->S = 1;
memcpy(&felsptr[i].statdat.st_ctime, &statdat->st_ctime, sizeof(time_t));
}
break;
case 'O': if(memcmp(&felsptr[i].statdat.st_mode, &statdat->st_mode, sizeof(mode_t))) {
dprintptr->O = 1;
memcpy(&felsptr[i].statdat.st_mode, &statdat->st_mode, sizeof(mode_t));
}
break;
case 'U': if(memcmp(&felsptr[i].statdat.st_uid, &statdat->st_uid, sizeof(uid_t))) {
dprintptr->U = 1;
memcpy(&felsptr[i].statdat.st_uid, &statdat->st_uid, sizeof(uid_t));
}
break;
case 'G': if(memcmp(&felsptr[i].statdat.st_gid, &statdat->st_gid, sizeof(gid_t))) {
dprintptr->G = 1;
memcpy(&felsptr[i].statdat.st_gid, &statdat->st_gid, sizeof(gid_t));
}
break;
case 'I': if(memcmp(&felsptr[i].statdat.st_ino, &statdat->st_ino, sizeof(ino_t))) {
dprintptr->I = 1;
memcpy(&felsptr[i].statdat.st_ino, &statdat->st_ino, sizeof(ino_t));
}
break;
case 'D': if(memcmp(&felsptr[i].statdat.st_dev, &statdat->st_dev, sizeof(dev_t))) {
dprintptr->D = 1;
memcpy(&felsptr[i].statdat.st_dev, &statdat->st_dev, sizeof(dev_t));
}
break;
default : printf("diffing()->WARNING: This should never happen!!!\n");
break;
}
}
freeme = mystrin_tmp;
mystrin_tmp = NULL;
}
free(freeme);
}
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