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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* tfslog.c:
*
* Optional facility for TFS that supports the ability to log all
* tfs actions that affect flash, to a log file.
*
* This function is called by tfsadd(), tfsunlink() and tfsipmod() to
* write to a log file indicating that something in tfs has been changed.
* Note that the function can be called at any user level, but it must be
* able to modify the TFS_CHANGELOG_FILE that has "u3" flags. The
* user level must be temporarily forced to MAXUSRLEVEL for this.
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
#include "config.h"
#include "stddefs.h"
#include "genlib.h"
#include "tfs.h"
#include "tfsprivate.h"
#include "cli.h"
#if TFS_CHANGELOG_SIZE
static int tfsLogging;
#endif
void
tfslog(int action, char *string)
{
#if TFS_CHANGELOG_SIZE
static char *tfslogaction[] = { "ADD", "DEL", "IPM", " ON", "OFF" };
extern void *setTmpMaxUsrLvl();
static char buf[TFS_CHANGELOG_SIZE];
TFILE *tfp;
int (*fptr)();
char *eol, *eob, *logaction, tbuf[32];
int newfsize, fsize, lsize, tfd, err, len, tbuflen;
switch(action) {
case TFSLOG_ADD: /* Return here if logging is off, */
case TFSLOG_DEL: /* or this tfslog() call is on the */
case TFSLOG_IPM: /* TFS_CHANGELOG_FILE itself. */
if(!tfsLogging || !strcmp(string,TFS_CHANGELOG_FILE)) {
return;
}
break;
case TFSLOG_ON:
if(tfsLogging == 1) {
return;
}
tfsLogging = 1;
break;
case TFSLOG_OFF:
if(tfsLogging == 0) {
return;
}
tfsLogging = 0;
break;
}
/* Force the getUsrLvl() function to return MAX: */
fptr = (int(*)())setTmpMaxUsrLvl();
logaction = tfslogaction[action];
tfp = tfsstat(TFS_CHANGELOG_FILE);
tfsGetAtime(0,tbuf,sizeof(tbuf));
tbuflen = strlen(tbuf);
if(tfp) {
tfd = tfsopen(TFS_CHANGELOG_FILE,TFS_RDONLY,0);
fsize = tfsread(tfd,buf,TFS_CHANGELOG_SIZE);
tfsclose(tfd,0);
newfsize = (fsize+strlen(logaction)+strlen(string)+3);
if(tbuflen) {
newfsize += tbuflen + 3;
}
eob = buf + fsize;
/* If newfsize is greater than the maximum size the file is
* allowed to grow, then keep removing the first line
* (oldest entry) until new size is within the limit...
*/
if(newfsize > TFS_CHANGELOG_SIZE) {
lsize = 0;
eol = buf;
while((newfsize-lsize) > TFS_CHANGELOG_SIZE) {
while((*eol != '\r') && (*eol != '\n')) {
eol++;
}
while((*eol == '\r') || (*eol == '\n')) {
eol++;
}
lsize = eol-buf;
}
fsize -= lsize;
newfsize -= lsize;
eob -= lsize;
memcpy(buf,eol,fsize);
}
if(tbuflen) {
sprintf(eob,"%s: %s @ %s\n",logaction,string,tbuf);
} else {
sprintf(eob,"%s: %s\n",logaction,string);
}
err = _tfsunlink(TFS_CHANGELOG_FILE);
if(err < 0)
printf("%s: %s\n",TFS_CHANGELOG_FILE,
(char *)tfsctrl(TFS_ERRMSG,err,0));
err = tfsadd(TFS_CHANGELOG_FILE,0,"u3",buf,newfsize);
if(err < 0)
printf("%s: %s\n",TFS_CHANGELOG_FILE,
(char *)tfsctrl(TFS_ERRMSG,err,0));
} else {
if(tbuflen) {
len = sprintf(buf,"%s: %s @ %s\n",logaction,string,tbuf);
} else {
len = sprintf(buf,"%s: %s\n",logaction,string);
}
err = tfsadd(TFS_CHANGELOG_FILE,0,"u3",buf,len);
if(err < 0)
printf("%s: %s\n",TFS_CHANGELOG_FILE,
(char *)tfsctrl(TFS_ERRMSG,err,0));
}
/* Restore the original getUsrLvl() functionality: */
clrTmpMaxUsrLvl(fptr);
#endif
}
int
tfsLogCmd(int argc,char *argv[], int optind)
{
#if TFS_CHANGELOG_SIZE
int status;
int retval = 0;
if(getUsrLvl() < MAXUSRLEVEL) {
status = showTfsError(TFSERR_USERDENIED,0);
} else {
if(argc == optind + 3) {
if(!strcmp(argv[optind+1],"on")) {
tfslog(TFSLOG_ON,argv[optind+2]);
} else if(!strcmp(argv[optind+1],"off")) {
tfslog(TFSLOG_OFF,argv[optind+2]);
} else {
retval = CMD_PARAM_ERROR;
}
} else if(argc == optind + 1) {
printf("TFS logging %sabled\n",tfsLogging ? "en" : "dis");
} else {
retval = CMD_PARAM_ERROR;
}
}
return(retval);
#else
return(CMD_FAILURE);
#endif
}
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