/
logrotate.c
1591 lines (1401 loc) · 40.3 KB
/
logrotate.c
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#include <sys/queue.h>
#include <alloca.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <glob.h>
#include <locale.h>
#ifdef WITH_SELINUX
#include <selinux/selinux.h>
static security_context_t prev_context = NULL;
int selinux_enabled = 0;
int selinux_enforce = 0;
#endif
#include "basenames.h"
#include "log.h"
#include "logrotate.h"
#if !defined(GLOB_ABORTED) && defined(GLOB_ABEND)
#define GLOB_ABORTED GLOB_ABEND
#endif
struct logState {
char *fn;
struct tm lastRotated; /* only tm.mon, tm_mday, tm_year are good! */
struct stat sb;
int doRotate;
LIST_ENTRY(logState) list;
};
struct logNames {
char *firstRotated;
char *disposeName;
char *finalName;
char *dirName;
char *baseName;
};
LIST_HEAD(stateSet, logState) states;
int numLogs = 0;
int debug = 0;
char *mailCommand = DEFAULT_MAIL_COMMAND;
time_t nowSecs = 0;
static int shred_file(char *filename, struct logInfo *log);
static int globerr(const char *pathname, int theerr)
{
message(MESS_ERROR, "error accessing %s: %s\n", pathname,
strerror(theerr));
/* We want the glob operation to continue, so return 0 */
return 1;
}
static struct logState *newState(const char *fn)
{
struct tm now = *localtime(&nowSecs);
struct logState *new;
time_t lr_time;
if ((new = malloc(sizeof(*new))) == NULL)
return NULL;
if ((new->fn = strdup(fn)) == NULL)
return NULL;
new->doRotate = 0;
memset(&new->lastRotated, 0, sizeof(new->lastRotated));
new->lastRotated.tm_mon = now.tm_mon;
new->lastRotated.tm_mday = now.tm_mday;
new->lastRotated.tm_year = now.tm_year;
/* fill in the rest of the new->lastRotated fields */
lr_time = mktime(&new->lastRotated);
new->lastRotated = *localtime(&lr_time);
return new;
}
static struct logState *findState(const char *fn)
{
struct logState *p;
for (p = states.lh_first; p != NULL; p = p->list.le_next)
if (!strcmp(fn, p->fn))
break;
/* new state */
if (p == NULL) {
if ((p = newState(fn)) == NULL)
return NULL;
LIST_INSERT_HEAD(&states, p, list);
}
return p;
}
static int runScript(char *logfn, char *script)
{
int rc;
if (debug) {
message(MESS_DEBUG, "running script with arg %s: \"%s\"\n",
logfn, script);
return 0;
}
if (!fork()) {
execl("/bin/sh", "sh", "-c", script, "logrotate_script", logfn, NULL);
exit(1);
}
wait(&rc);
return rc;
}
int createOutputFile(char *fileName, int flags, struct stat *sb)
{
int fd;
fd = open(fileName, flags, sb->st_mode);
if (fd < 0) {
message(MESS_ERROR, "error creating output file %s: %s\n",
fileName, strerror(errno));
return -1;
}
if (fchmod(fd, (S_IRUSR | S_IWUSR) & sb->st_mode)) {
message(MESS_ERROR, "error setting mode of %s: %s\n",
fileName, strerror(errno));
close(fd);
return -1;
}
if (fchown(fd, sb->st_uid, sb->st_gid)) {
message(MESS_ERROR, "error setting owner of %s: %s\n",
fileName, strerror(errno));
close(fd);
return -1;
}
if (fchmod(fd, sb->st_mode)) {
message(MESS_ERROR, "error setting mode of %s: %s\n",
fileName, strerror(errno));
close(fd);
return -1;
}
return fd;
}
#define SHRED_CALL "shred -u "
#define SHRED_COUNT_FLAG "-n "
#define DIGITS 10
/* unlink, but try to call shred from GNU fileutils */
static int shred_file(char *filename, struct logInfo *log)
{
int len, ret;
char *cmd;
char count[DIGITS]; /* that's a lot of shredding :) */
if (!(log->flags & LOG_FLAG_SHRED)) {
return unlink(filename);
}
len = strlen(filename) + strlen(SHRED_CALL);
len += strlen(SHRED_COUNT_FLAG) + DIGITS;
cmd = malloc(len);
if (!cmd) {
message(MESS_ERROR, "malloc error while shredding");
return unlink(filename);
}
strcpy(cmd, SHRED_CALL);
if (log->shred_cycles != 0) {
strcat(cmd, SHRED_COUNT_FLAG);
snprintf(count, DIGITS - 1, "%d", log->shred_cycles);
strcat(count, " ");
strcat(cmd, count);
}
strcat(cmd, filename);
ret = system(cmd);
free(cmd);
if (ret != 0) {
message(MESS_ERROR, "Failed to shred %s\n, trying unlink", filename);
if (ret != -1) {
message(MESS_NORMAL, "Shred returned %d\n", ret);
}
return unlink(filename);
} else {
return ret;
}
}
static int removeLogFile(char *name, struct logInfo *log)
{
message(MESS_DEBUG, "removing old log %s\n", name);
if (!debug && shred_file(name, log)) {
message(MESS_ERROR, "Failed to remove old log %s: %s\n",
name, strerror(errno));
return 1;
}
return 0;
}
static int compressLogFile(char *name, struct logInfo *log, struct stat *sb)
{
char *compressedName;
const char **fullCommand;
int inFile;
int outFile;
int i;
int status;
message(MESS_DEBUG, "compressing log with: %s\n", log->compress_prog);
if (debug)
return 0;
fullCommand = alloca(sizeof(*fullCommand) *
(log->compress_options_count + 2));
fullCommand[0] = log->compress_prog;
for (i = 0; i < log->compress_options_count; i++)
fullCommand[i + 1] = log->compress_options_list[i];
fullCommand[log->compress_options_count + 1] = NULL;
compressedName = alloca(strlen(name) + strlen(log->compress_ext) + 2);
sprintf(compressedName, "%s%s", name, log->compress_ext);
if ((inFile = open(name, O_RDONLY)) < 0) {
message(MESS_ERROR, "unable to open %s for compression\n", name);
return 1;
}
outFile =
createOutputFile(compressedName, O_RDWR | O_CREAT | O_TRUNC, sb);
if (outFile < 0) {
close(inFile);
return 1;
}
if (!fork()) {
dup2(inFile, 0);
close(inFile);
dup2(outFile, 1);
close(outFile);
execvp(fullCommand[0], (void *) fullCommand);
exit(1);
}
close(inFile);
close(outFile);
wait(&status);
if (!WIFEXITED(status) || WEXITSTATUS(status)) {
message(MESS_ERROR, "failed to compress log %s\n", name);
return 1;
}
shred_file(name, log);
return 0;
}
static int mailLog(char *logFile, char *mailCommand,
char *uncompressCommand, char *address, char *subject)
{
int mailInput;
pid_t mailChild, uncompressChild;
int mailStatus, uncompressStatus;
int uncompressPipe[2];
char *mailArgv[] = { mailCommand, "-s", subject, address, NULL };
int rc = 0;
if ((mailInput = open(logFile, O_RDONLY)) < 0) {
message(MESS_ERROR, "failed to open %s for mailing: %s\n", logFile,
strerror(errno));
return 1;
}
if (uncompressCommand) {
pipe(uncompressPipe);
if (!(uncompressChild = fork())) {
/* uncompress child */
dup2(mailInput, 0);
close(mailInput);
dup2(uncompressPipe[1], 1);
close(uncompressPipe[0]);
close(uncompressPipe[1]);
execlp(uncompressCommand, uncompressCommand, NULL);
exit(1);
}
close(mailInput);
mailInput = uncompressPipe[0];
close(uncompressPipe[1]);
}
if (!(mailChild = fork())) {
dup2(mailInput, 0);
close(mailInput);
close(1);
execvp(mailArgv[0], mailArgv);
exit(1);
}
close(mailInput);
waitpid(mailChild, &mailStatus, 0);
if (!WIFEXITED(mailStatus) || WEXITSTATUS(mailStatus)) {
message(MESS_ERROR, "mail command failed for %s\n", logFile);
rc = 1;
}
if (uncompressCommand) {
waitpid(uncompressChild, &uncompressStatus, 0);
if (!WIFEXITED(uncompressStatus) || WEXITSTATUS(uncompressStatus)) {
message(MESS_ERROR, "uncompress command failed mailing %s\n",
logFile);
rc = 1;
}
}
return rc;
}
static int mailLogWrapper(char *mailFilename, char *mailCommand,
int logNum, struct logInfo *log)
{
/* if the log is compressed (and we're not mailing a
* file whose compression has been delayed), we need
* to uncompress it */
if ((log->flags & LOG_FLAG_COMPRESS) &&
!((log->flags & LOG_FLAG_DELAYCOMPRESS) &&
(log->flags & LOG_FLAG_MAILFIRST))) {
if (mailLog(mailFilename, mailCommand,
log->uncompress_prog, log->logAddress,
log->files[logNum]))
return 1;
} else {
if (mailLog(mailFilename, mailCommand, NULL,
log->logAddress, mailFilename))
return 1;
}
return 0;
}
static int copyTruncate(char *currLog, char *saveLog, struct stat *sb,
int flags)
{
char buf[BUFSIZ];
int fdcurr = -1, fdsave = -1;
ssize_t cnt;
message(MESS_DEBUG, "copying %s to %s\n", currLog, saveLog);
if (!debug) {
if ((fdcurr = open(currLog, O_RDWR)) < 0) {
message(MESS_ERROR, "error opening %s: %s\n", currLog,
strerror(errno));
return 1;
}
#ifdef WITH_SELINUX
if (selinux_enabled) {
security_context_t oldContext;
if (fgetfilecon_raw(fdcurr, &oldContext) >= 0) {
if (getfscreatecon_raw(&prev_context) < 0) {
message(MESS_ERROR,
"getting default context: %s\n",
strerror(errno));
if (selinux_enforce) {
if (oldContext) {
freecon(oldContext);
}
return 1;
}
}
if (setfscreatecon_raw(oldContext) < 0) {
message(MESS_ERROR,
"setting file context %s to %s: %s\n",
saveLog, oldContext, strerror(errno));
if (selinux_enforce) {
if (oldContext) {
freecon(oldContext);
}
return 1;
}
}
message(MESS_DEBUG, "set default create context\n");
if (oldContext) {
freecon(oldContext);
}
} else {
if (errno != ENOTSUP) {
message(MESS_ERROR, "getting file context %s: %s\n",
currLog, strerror(errno));
if (selinux_enforce) {
return 1;
}
}
}
}
#endif
fdsave =
createOutputFile(saveLog, O_WRONLY | O_CREAT | O_TRUNC, sb);
#ifdef WITH_SELINUX
if (selinux_enabled) {
setfscreatecon_raw(prev_context);
if (prev_context != NULL) {
freecon(prev_context);
prev_context = NULL;
}
}
#endif
if (fdsave < 0) {
close(fdcurr);
return 1;
}
while ((cnt = read(fdcurr, buf, sizeof(buf))) > 0) {
if (write(fdsave, buf, cnt) != cnt) {
message(MESS_ERROR, "error writing to %s: %s\n",
saveLog, strerror(errno));
close(fdcurr);
close(fdsave);
return 1;
}
}
if (cnt != 0) {
message(MESS_ERROR, "error reading %s: %s\n",
currLog, strerror(errno));
close(fdcurr);
close(fdsave);
return 1;
}
}
if (flags & LOG_FLAG_COPYTRUNCATE) {
message(MESS_DEBUG, "truncating %s\n", currLog);
if (!debug)
if (ftruncate(fdcurr, 0)) {
message(MESS_ERROR, "error truncating %s: %s\n", currLog,
strerror(errno));
close(fdcurr);
close(fdsave);
return 1;
}
} else
message(MESS_DEBUG, "Not truncating %s\n", currLog);
close(fdcurr);
close(fdsave);
return 0;
}
int findNeedRotating(struct logInfo *log, int logNum)
{
struct stat sb;
struct logState *state = NULL;
struct tm now = *localtime(&nowSecs);
message(MESS_DEBUG, "considering log %s\n", log->files[logNum]);
if (stat(log->files[logNum], &sb)) {
if ((log->flags & LOG_FLAG_MISSINGOK) && (errno == ENOENT)) {
message(MESS_DEBUG, " log %s does not exist -- skipping\n",
log->files[logNum]);
return 0;
}
message(MESS_ERROR, "stat of %s failed: %s\n", log->files[logNum],
strerror(errno));
return 1;
}
state = findState(log->files[logNum]);
state->doRotate = 0;
state->sb = sb;
if (log->criterium == ROT_SIZE) {
state->doRotate = (sb.st_size >= log->threshhold);
} else if (log->criterium == ROT_FORCE) {
/* user forced rotation of logs from command line */
state->doRotate = 1;
} else if (state->lastRotated.tm_year > now.tm_year ||
(state->lastRotated.tm_year == now.tm_year &&
(state->lastRotated.tm_mon > now.tm_mon ||
(state->lastRotated.tm_mon == now.tm_mon &&
state->lastRotated.tm_mday > now.tm_mday)))) {
message(MESS_ERROR,
"log %s last rotated in the future -- rotation forced\n",
log->files[logNum]);
state->doRotate = 1;
} else if (state->lastRotated.tm_year != now.tm_year ||
state->lastRotated.tm_mon != now.tm_mon ||
state->lastRotated.tm_mday != now.tm_mday) {
switch (log->criterium) {
case ROT_WEEKLY:
/* rotate if:
1) the current weekday is before the weekday of the
last rotation
2) more then a week has passed since the last
rotation */
state->doRotate = ((now.tm_wday < state->lastRotated.tm_wday)
||
((mktime(&now) -
mktime(&state->lastRotated)) >
(7 * 24 * 3600)));
break;
case ROT_MONTHLY:
/* rotate if the logs haven't been rotated this month or
this year */
state->doRotate = ((now.tm_mon != state->lastRotated.tm_mon) ||
(now.tm_year !=
state->lastRotated.tm_year));
break;
case ROT_DAYS:
/* FIXME: only days=1 is implemented!! */
state->doRotate = 1;
break;
case ROT_YEARLY:
/* rotate if the logs haven't been rotated this year */
state->doRotate = (now.tm_year != state->lastRotated.tm_year);
break;
default:
/* ack! */
state->doRotate = 0;
break;
}
if (log->minsize && sb.st_size < log->minsize)
state->doRotate = 0;
}
/* The notifempty flag overrides the normal criteria */
if (!(log->flags & LOG_FLAG_IFEMPTY) && !sb.st_size)
state->doRotate = 0;
if (state->doRotate) {
message(MESS_DEBUG, " log needs rotating\n");
} else {
message(MESS_DEBUG, " log does not need rotating\n");
}
return 0;
}
int prerotateSingleLog(struct logInfo *log, int logNum, struct logState *state,
struct logNames *rotNames)
{
struct tm now = *localtime(&nowSecs);
char *oldName, *newName = NULL;
char *tmp;
char *compext = "";
char *fileext = "";
int hasErrors = 0;
int i, j;
char *glob_pattern;
glob_t globResult;
int rc;
int rotateCount = log->rotateCount ? log->rotateCount : 1;
int logStart = (log->logStart == -1) ? 1 : log->logStart;
#define DATEEXT_LEN 64
#define PATTERN_LEN (DATEEXT_LEN * 2)
char dext_str[DATEEXT_LEN];
char dformat[DATEEXT_LEN];
char dext_pattern[PATTERN_LEN];
char *dext;
if (!state->doRotate)
return 0;
/* Logs with rotateCounts of 0 are rotated once, then removed. This
lets scripts run properly, and everything gets mailed properly. */
message(MESS_DEBUG, "rotating log %s, log->rotateCount is %d\n",
log->files[logNum], log->rotateCount);
if (log->flags & LOG_FLAG_COMPRESS)
compext = log->compress_ext;
state->lastRotated = now;
if (log->oldDir) {
if (log->oldDir[0] != '/') {
char *ld = ourDirName(log->files[logNum]);
rotNames->dirName =
malloc(strlen(ld) + strlen(log->oldDir) + 2);
sprintf(rotNames->dirName, "%s/%s", ld, log->oldDir);
free(ld);
} else
rotNames->dirName = strdup(log->oldDir);
} else
rotNames->dirName = ourDirName(log->files[logNum]);
rotNames->baseName = strdup(ourBaseName(log->files[logNum]));
oldName = alloca(PATH_MAX);
newName = alloca(PATH_MAX);
rotNames->disposeName = malloc(PATH_MAX);
if (log->extension &&
strncmp(&
(rotNames->
baseName[strlen(rotNames->baseName) -
strlen(log->extension)]), log->extension,
strlen(log->extension)) == 0) {
char *tempstr;
fileext = log->extension;
tempstr =
calloc(strlen(rotNames->baseName) - strlen(log->extension) + 1,
sizeof(char));
strncat(tempstr, rotNames->baseName,
strlen(rotNames->baseName) - strlen(log->extension));
free(rotNames->baseName);
rotNames->baseName = tempstr;
}
/* Allow only %Y %d %m and create valid strftime format string
* Construct the glob pattern corresponding to the date format */
dext_str[0] = '\0';
if (log->dateformat) {
i = j = 0;
memset(dext_pattern, 0, sizeof(dext_pattern));
dext = log->dateformat;
while (*dext == ' ')
dext++;
while ((*dext != '\0') && (!hasErrors)) {
/* Will there be a space for a char and '\0'? */
if (j >= (sizeof(dext_pattern) - 1)) {
message(MESS_ERROR, "Date format %s is too long\n",
log->dateformat);
hasErrors = 1;
break;
}
if (*dext == '%') {
switch (*(dext + 1)) {
case 'Y':
strncat(dext_pattern, "[0-9][0-9]",
sizeof(dext_pattern) - strlen(dext_pattern));
j += 10; /* strlen("[0-9][0-9]") */
case 'm':
case 'd':
strncat(dext_pattern, "[0-9][0-9]",
sizeof(dext_pattern) - strlen(dext_pattern));
j += 10;
if (j >= (sizeof(dext_pattern) - 1)) {
message(MESS_ERROR, "Date format %s is too long\n",
log->dateformat);
hasErrors = 1;
break;
}
dformat[i++] = *(dext++);
dformat[i] = *dext;
break;
default:
dformat[i++] = *dext;
dformat[i] = '%';
dext_pattern[j++] = *dext;
break;
}
} else {
dformat[i] = *dext;
dext_pattern[j++] = *dext;
}
++i;
++dext;
}
dformat[i] = '\0';
message(MESS_DEBUG, "Converted '%s' -> '%s'\n", log->dateformat, dformat);
strftime(dext_str, sizeof(dext_str), dformat, &now);
} else {
/* The default dateformat and glob pattern */
strftime(dext_str, sizeof(dext_str), "-%Y%m%d", &now);
strncpy(dext_pattern, "-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]",
sizeof(dext_pattern));
dext_pattern[PATTERN_LEN - 1] = '\0';
}
message(MESS_DEBUG, "dateext suffix '%s'\n", dext_str);
message(MESS_DEBUG, "glob pattern '%s'\n", dext_pattern);
/* First compress the previous log when necessary */
if (log->flags & LOG_FLAG_COMPRESS &&
log->flags & LOG_FLAG_DELAYCOMPRESS) {
if (log->flags & LOG_FLAG_DATEEXT) {
/* glob for uncompressed files with our pattern */
asprintf(&glob_pattern, "%s/%s%s%s",
rotNames->dirName, rotNames->baseName, dext_pattern, fileext);
rc = glob(glob_pattern, 0, globerr, &globResult);
if (!rc && globResult.gl_pathc > 0) {
for (i = 0; i < globResult.gl_pathc && !hasErrors; i++) {
struct stat sbprev;
snprintf(oldName, PATH_MAX, "%s", (globResult.gl_pathv)[i]);
if (stat(oldName, &sbprev)) {
message(MESS_DEBUG,
"previous log %s does not exist\n",
oldName);
} else {
hasErrors = compressLogFile(oldName, log, &sbprev);
}
}
} else {
message(MESS_DEBUG,
"glob finding logs to compress failed\n");
/* fallback to old behaviour */
snprintf(oldName, PATH_MAX, "%s/%s.%d%s", rotNames->dirName,
rotNames->baseName, logStart, fileext);
}
globfree(&globResult);
free(glob_pattern);
} else {
struct stat sbprev;
snprintf(oldName, PATH_MAX, "%s/%s.%d%s", rotNames->dirName,
rotNames->baseName, logStart, fileext);
if (stat(oldName, &sbprev)) {
message(MESS_DEBUG, "previous log %s does not exist\n",
oldName);
} else {
hasErrors = compressLogFile(oldName, log, &sbprev);
}
}
}
rotNames->firstRotated =
malloc(strlen(rotNames->dirName) + strlen(rotNames->baseName) +
strlen(fileext) + strlen(compext) + 30);
if (log->flags & LOG_FLAG_DATEEXT) {
/* glob for compressed files with our pattern
* and compress ext */
asprintf(&glob_pattern, "%s/%s%s%s%s",
rotNames->dirName, rotNames->baseName, dext_pattern, fileext, compext);
rc = glob(glob_pattern, 0, globerr, &globResult);
if (!rc) {
/* search for files to drop, if we find one remember it,
* if we find another one mail and remove the first and
* remember the second and so on */
struct stat fst_buf;
int mail_out = -1;
/* remove the first (n - rotateCount) matches
* no real rotation needed, since the files have
* the date in their name */
for (i = 0; i < globResult.gl_pathc; i++) {
if (!stat((globResult.gl_pathv)[i], &fst_buf)) {
if ((i <= ((int) globResult.gl_pathc - rotateCount))
|| ((log->rotateAge > 0)
&&
(((nowSecs - fst_buf.st_mtime) / 60 / 60 / 24)
> log->rotateAge))) {
if (mail_out != -1) {
char *mailFilename =
(globResult.gl_pathv)[mail_out];
if (!hasErrors && log->logAddress)
hasErrors =
mailLogWrapper(mailFilename,
mailCommand, logNum,
log);
if (!hasErrors)
message(MESS_DEBUG, "removing %s\n", mailFilename);
hasErrors = removeLogFile(mailFilename, log);
}
mail_out = i;
}
}
}
if (mail_out != -1) {
/* oldName is oldest Backup found (for unlink later) */
snprintf(oldName, PATH_MAX, "%s", (globResult.gl_pathv)[mail_out]);
strcpy(rotNames->disposeName, oldName);
} else {
free(rotNames->disposeName);
rotNames->disposeName = NULL;
}
} else {
message(MESS_DEBUG, "glob finding old rotated logs failed\n");
free(rotNames->disposeName);
rotNames->disposeName = NULL;
}
/* firstRotated is most recently created/compressed rotated log */
sprintf(rotNames->firstRotated, "%s/%s%s%s%s",
rotNames->dirName, rotNames->baseName, dext_str, fileext, compext);
globfree(&globResult);
free(glob_pattern);
} else {
if (log->rotateAge) {
struct stat fst_buf;
for (i = 1; i <= rotateCount + 1; i++) {
snprintf(oldName, PATH_MAX, "%s/%s.%d%s%s", rotNames->dirName,
rotNames->baseName, i, fileext, compext);
if (!stat(oldName, &fst_buf)
&& (((nowSecs - fst_buf.st_mtime) / 60 / 60 / 24)
> log->rotateAge)) {
char *mailFilename = oldName;
if (!hasErrors && log->logAddress)
hasErrors =
mailLogWrapper(mailFilename, mailCommand,
logNum, log);
if (!hasErrors)
hasErrors = removeLogFile(mailFilename, log);
}
}
}
snprintf(oldName, PATH_MAX, "%s/%s.%d%s%s", rotNames->dirName,
rotNames->baseName, logStart + rotateCount, fileext,
compext);
strcpy(newName, oldName);
strcpy(rotNames->disposeName, oldName);
sprintf(rotNames->firstRotated, "%s/%s.%d%s%s", rotNames->dirName,
rotNames->baseName, logStart, fileext,
(log->flags & LOG_FLAG_DELAYCOMPRESS) ? "" : compext);
#ifdef WITH_SELINUX
if (selinux_enabled) {
security_context_t oldContext = NULL;
if (getfilecon_raw(log->files[logNum], &oldContext) > 0) {
if (getfscreatecon_raw(&prev_context) < 0) {
message(MESS_ERROR,
"getting default context: %s\n",
strerror(errno));
if (selinux_enforce) {
if (oldContext) {
freecon(oldContext);
}
return 1;
}
}
if (setfscreatecon_raw(oldContext) < 0) {
message(MESS_ERROR,
"setting file context %s to %s: %s\n",
log->files[logNum], oldContext,
strerror(errno));
if (selinux_enforce) {
if (oldContext) {
freecon(oldContext);
}
return 1;
}
}
if (oldContext) {
freecon(oldContext);
}
} else {
if (errno != ENOENT && errno != ENOTSUP) {
message(MESS_ERROR, "getting file context %s: %s\n",
log->files[logNum], strerror(errno));
if (selinux_enforce) {
return 1;
}
}
}
}
#endif
for (i = rotateCount + logStart - 1; (i >= 0) && !hasErrors; i--) {
tmp = newName;
newName = oldName;
oldName = tmp;
snprintf(oldName, PATH_MAX, "%s/%s.%d%s%s", rotNames->dirName,
rotNames->baseName, i, fileext, compext);
message(MESS_DEBUG,
"renaming %s to %s (rotatecount %d, logstart %d, i %d), \n",
oldName, newName, rotateCount, logStart, i);
if (!debug && rename(oldName, newName)) {
if (errno == ENOENT) {
message(MESS_DEBUG, "old log %s does not exist\n",
oldName);
} else {
message(MESS_ERROR, "error renaming %s to %s: %s\n",
oldName, newName, strerror(errno));
hasErrors = 1;
}
}
}
} /* !LOG_FLAG_DATEEXT */
if (log->flags & LOG_FLAG_DATEEXT) {
char *destFile =
alloca(strlen(rotNames->dirName) + strlen(rotNames->baseName) +
strlen(fileext) + strlen(compext) + 30);
struct stat fst_buf;
asprintf(&(rotNames->finalName), "%s/%s%s%s",
rotNames->dirName, rotNames->baseName, dext_str, fileext);
sprintf(destFile, "%s%s", rotNames->finalName, compext);
if (!stat(destFile, &fst_buf)) {
message(MESS_DEBUG,
"destination %s already exists, skipping rotation\n",
rotNames->firstRotated);
hasErrors = 1;
}
} else {
/* note: the gzip extension is *not* used here! */
asprintf(&(rotNames->finalName), "%s/%s.%d%s", rotNames->dirName,
rotNames->baseName, logStart, fileext);
}
/* if the last rotation doesn't exist, that's okay */
if (!debug && rotNames->disposeName
&& access(rotNames->disposeName, F_OK)) {
message(MESS_DEBUG,
"log %s doesn't exist -- won't try to " "dispose of it\n",
rotNames->disposeName);
free(rotNames->disposeName);
rotNames->disposeName = NULL;
}
return hasErrors;
}
int rotateSingleLog(struct logInfo *log, int logNum, struct logState *state,
struct logNames *rotNames)
{
int hasErrors = 0;
struct stat sb;
int fd;
#ifdef WITH_SELINUX
security_context_t savedContext = NULL;
#endif
if (!state->doRotate)
return 0;
if (!hasErrors) {
if (!(log->flags & (LOG_FLAG_COPYTRUNCATE | LOG_FLAG_COPY))) {
#ifdef WITH_SELINUX
if (selinux_enabled) {
security_context_t oldContext = NULL;
int fdcurr = -1;
if ((fdcurr = open(log->files[logNum], O_RDWR)) < 0) {
message(MESS_ERROR, "error opening %s: %s\n",
log->files[logNum],
strerror(errno));
return 1;
}
if (fgetfilecon_raw(fdcurr, &oldContext) >= 0) {
if (getfscreatecon_raw(&savedContext) < 0) {
message(MESS_ERROR,
"getting default context: %s\n",
strerror(errno));
if (selinux_enforce) {
if (oldContext) {
freecon(oldContext);
}
if (close(fdcurr) < 0)
message(MESS_ERROR, "error closing file %s",
log->files[logNum]);
return 1;
}
}
if (setfscreatecon_raw(oldContext) < 0) {
message(MESS_ERROR,
"setting file context %s to %s: %s\n",
log->files[logNum], oldContext, strerror(errno));
if (selinux_enforce) {
if (oldContext) {
freecon(oldContext);
}
if (close(fdcurr) < 0)
message(MESS_ERROR, "error closing file %s",
log->files[logNum]);
return 1;
}
}
message(MESS_DEBUG, "fscreate context set to %s\n",
oldContext);
if (oldContext) {
freecon(oldContext);
}
} else {
if (errno != ENOTSUP) {
message(MESS_ERROR, "getting file context %s: %s\n",
log->files[logNum], strerror(errno));
if (selinux_enforce) {
if (close(fdcurr) < 0)
message(MESS_ERROR, "error closing file %s",
log->files[logNum]);
return 1;
}