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config.c
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config.c
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#include "queue.h"
#include <limits.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <glob.h>
#include <grp.h>
#include <popt.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <assert.h>
#include <wchar.h>
#include <wctype.h>
#include <fnmatch.h>
#include <sys/mman.h>
#include <libgen.h>
#if !defined(PATH_MAX) && defined(__FreeBSD__)
#include <sys/param.h>
#endif
#include "log.h"
#include "logrotate.h"
struct logInfoHead logs;
#if !defined(GLOB_ABORTED) && defined(GLOB_ABEND)
#define GLOB_ABORTED GLOB_ABEND
#endif
#define REALLOC_STEP 10
#define GLOB_STR_REALLOC_STEP 0x100
#if defined(SunOS) && !defined(isblank)
#define isblank(c) ( ( (c) == ' ' || (c) == '\t' ) ? 1 : 0 )
#endif
#ifdef __hpux
#include "asprintf.c"
#endif
#if !defined(HAVE_SECURE_GETENV)
#define secure_getenv getenv
#endif
#if !defined(HAVE_ASPRINTF) && !defined(_FORTIFY_SOURCE)
#include <stdarg.h>
int asprintf(char **string_ptr, const char *format, ...)
{
va_list arg;
char *str;
int size;
int rv;
va_start(arg, format);
size = vsnprintf(NULL, 0, format, arg);
va_end(arg);
if (size < 0) {
return -1;
}
str = malloc((size_t)size + 1);
if (str == NULL) {
return -1;
}
va_start(arg, format);
rv = vsnprintf(str, (size_t)size + 1, format, arg);
va_end(arg);
*string_ptr = str;
return rv;
}
#endif
#if !defined(HAVE_STRNDUP)
char *strndup(const char *s, size_t n)
{
size_t nAvail;
char *p;
/* min() */
nAvail = strlen(s) + 1;
if ( (n + 1) < nAvail)
nAvail = n + 1;
p = malloc(nAvail);
if (!p)
return NULL;
memcpy(p, s, nAvail);
p[nAvail - 1] = 0;
return p;
}
#endif
/* list of compression commands and the corresponding file extensions */
struct compress_cmd_item {
const char *cmd;
const char *ext;
};
static const struct compress_cmd_item compress_cmd_list[] = {
{"gzip", ".gz"},
{"bzip2", ".bz2"},
{"xz", ".xz"},
{"zstd", ".zst"},
{"compress", ".Z"},
{"zip", "zip"},
};
static const unsigned compress_cmd_list_size = sizeof(compress_cmd_list)
/ sizeof(compress_cmd_list[0]);
enum {
STATE_DEFAULT = 2,
STATE_SKIP_LINE = 4,
STATE_DEFINITION_END = 8,
STATE_SKIP_CONFIG = 16,
STATE_LOAD_SCRIPT = 32,
STATE_ERROR = 64,
};
static const char *const defTabooExts[] = {
",v",
".bak",
".cfsaved",
".disabled",
".dpkg-bak",
".dpkg-del",
".dpkg-dist",
".dpkg-new",
".dpkg-old",
".dpkg-tmp",
".rhn-cfg-tmp-*",
".rpmnew",
".rpmorig",
".rpmsave",
".swp",
".ucf-dist",
".ucf-new",
".ucf-old",
"~"
};
static const unsigned defTabooCount = sizeof(defTabooExts) / sizeof(char *);
/* I shouldn't use globals here :-( */
static char **tabooPatterns = NULL;
static unsigned tabooCount = 0;
static int glob_errno = 0;
static int readConfigFile(const char *configFile, struct logInfo *defConfig);
static int globerr(const char *pathname, int theerr);
static char *isolateLine(char **strt, char **buf, size_t length) {
char *endtag, *start, *tmp;
const char *max = *buf + length;
char *key;
start = *strt;
endtag = start;
while (endtag < max && *endtag != '\n') {
endtag++;}
if (max < endtag)
return NULL;
tmp = endtag - 1;
while (isspace((unsigned char)*endtag))
endtag--;
key = strndup(start, (size_t)(endtag - start + 1));
if (key == NULL) {
message_OOM();
return NULL;
}
*strt = tmp;
return key;
}
static char *isolateValue(const char *fileName, int lineNum, const char *key,
char **startPtr, char **buf, size_t length)
{
char *chptr = *startPtr;
const char *max = *startPtr + length;
while (chptr < max && isblank((unsigned char)*chptr))
chptr++;
if (chptr < max && *chptr == '=') {
chptr++;
while ( chptr < max && isblank((unsigned char)*chptr))
chptr++;
}
if (chptr < max && *chptr == '\n') {
message(MESS_ERROR, "%s:%d argument expected after %s\n",
fileName, lineNum, key);
return NULL;
}
*startPtr = chptr;
return isolateLine(startPtr, buf, length);
}
static char *isolateWord(char **strt, char **buf, size_t length) {
char *endtag, *start;
const char *max = *buf + length;
char *key;
start = *strt;
while (start < max && isblank((unsigned char)*start))
start++;
endtag = start;
while (endtag < max && isalpha((unsigned char)*endtag)) {
endtag++;}
if (max < endtag)
return NULL;
key = strndup(start, (size_t)(endtag - start));
if (key == NULL) {
message_OOM();
return NULL;
}
*strt = endtag;
return key;
}
static char *readPath(const char *configFile, int lineNum, const char *key,
char **startPtr, char **buf, size_t length)
{
char *path = isolateValue(configFile, lineNum, key, startPtr, buf, length);
if (path != NULL) {
wchar_t pwc;
size_t len;
const char *chptr = path;
while (*chptr && (len = mbrtowc(&pwc, chptr, strlen(chptr), NULL)) != 0) {
if (len == (size_t)(-1) || len == (size_t)(-2) || !iswprint((wint_t)pwc) || iswblank((wint_t)pwc)) {
message(MESS_ERROR, "%s:%d bad %s path %s\n",
configFile, lineNum, key, path);
free(path);
return NULL;
}
chptr += len;
}
}
return path;
}
/* set *pUid to UID of the given user, return non-zero on failure */
static int resolveUid(const char *userName, uid_t *pUid)
{
const struct passwd *pw;
char *endptr;
unsigned long int parsed_uid;
#ifdef __CYGWIN__
if (strcmp(userName, "root") == 0) {
*pUid = 0;
return 0;
}
#endif
pw = getpwnam(userName);
if (pw) {
*pUid = pw->pw_uid;
return 0;
}
parsed_uid = strtoul(userName, &endptr, 10);
if (userName[0] != '\0' &&
*endptr == '\0' &&
parsed_uid < INT_MAX && /* parsed_uid != ULONG_MAX && */
getpwuid((uid_t)parsed_uid) != NULL) {
*pUid = (uid_t)parsed_uid;
return 0;
}
return -1;
}
/* set *pGid to GID of the given group, return non-zero on failure */
static int resolveGid(const char *groupName, gid_t *pGid)
{
const struct group *gr;
char *endptr;
unsigned long int parsed_gid;
#ifdef __CYGWIN__
if (strcmp(groupName, "root") == 0) {
*pGid = 0;
return 0;
}
#endif
gr = getgrnam(groupName);
if (gr) {
*pGid = gr->gr_gid;
return 0;
}
parsed_gid = strtoul(groupName, &endptr, 10);
if (groupName[0] != '\0' &&
*endptr == '\0' &&
parsed_gid < INT_MAX && /* parsed_gid != ULONG_MAX && */
getgrgid((gid_t)parsed_gid) != NULL) {
*pGid = (gid_t)parsed_gid;
return 0;
}
return -1;
}
static int readModeUidGid(const char *configFile, int lineNum, const char *key,
const char *directive, mode_t *mode, uid_t *pUid,
gid_t *pGid)
{
char u[200], g[200];
mode_t m = 0;
char tmp;
int rc;
if (!strcmp("su", directive))
/* do not read <mode> for the 'su' directive */
rc = 0;
else {
unsigned short int parsed_mode;
rc = sscanf(key, "%ho %199s %199s%c", &parsed_mode, u, g, &tmp);
m = parsed_mode;
}
/* We support 'key <owner> <group> notation now */
if (rc == 0) {
rc = sscanf(key, "%199s %199s%c", u, g, &tmp);
/* Simulate that we have read mode and keep the default value. */
if (rc > 0) {
m = *mode;
rc += 1;
}
}
if (rc == 4) {
message(MESS_ERROR, "%s:%d extra arguments for "
"%s\n", configFile, lineNum, directive);
return -1;
}
if (rc > 0) {
*mode = m;
}
if (rc > 1) {
if (resolveUid(u, pUid) != 0) {
message(MESS_ERROR, "%s:%d unknown user '%s'\n",
configFile, lineNum, u);
return -1;
}
}
if (rc > 2) {
if (resolveGid(g, pGid) != 0) {
message(MESS_ERROR, "%s:%d unknown group '%s'\n",
configFile, lineNum, g);
return -1;
}
}
return 0;
}
static char *readAddress(const char *configFile, int lineNum, const char *key,
char **startPtr, char **buf, size_t length)
{
char *start = *startPtr;
char *address = isolateValue(configFile, lineNum, key, startPtr, buf, length);
if (address != NULL) {
/* validate the address */
const char *chptr = address;
while (isprint((unsigned char) *chptr) && *chptr != ' ') {
chptr++;
}
if (*chptr) {
message(MESS_ERROR, "%s:%d bad %s address %s\n",
configFile, lineNum, key, start);
free(address);
return NULL;
}
}
return address;
}
static int do_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
if (mkdir(path, mode) == 0) {
int fd;
/* newly created directory, set the owner and permissions */
fd = open(path, O_RDONLY | O_DIRECTORY | O_);
if (fd < 0) {
message(MESS_ERROR, "error opening %s after creation: %s\n",
path, strerror(errno));
return -1;
}
if (fchown(fd, uid, gid) != 0) {
message(MESS_ERROR, "error setting owner of %s to uid %u and gid %u: %s\n",
path, (unsigned) uid, (unsigned) gid, strerror(errno));
close(fd);
return -1;
}
if (fchmod(fd, mode) != 0) {
message(MESS_ERROR, "error setting permissions of %s to 0%o: %s\n",
path, mode, strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}
if (errno == EEXIST) {
/* path already exists, check whether it is a directory or not */
struct stat sb;
if ((stat(path, &sb) == 0) && S_ISDIR(sb.st_mode))
return 0;
message(MESS_ERROR, "path %s already exists, but it is not a directory\n", path);
errno = ENOTDIR;
return -1;
}
message(MESS_ERROR, "error creating %s: %s\n", path, strerror(errno));
return -1;
}
static int mkpath(const char *path, mode_t mode, uid_t uid, gid_t gid) {
char *pp;
char *sp;
int rv;
char *copypath = strdup(path);
if (!copypath) {
message_OOM();
return 1;
}
rv = 0;
pp = copypath;
while (rv == 0 && (sp = strchr(pp, '/')) != NULL) {
if (sp != pp) {
*sp = '\0';
rv = do_mkdir(copypath, mode, uid, gid);
*sp = '/';
}
pp = sp + 1;
}
if (rv == 0) {
rv = do_mkdir(path, mode, uid, gid);
}
free(copypath);
return rv;
}
static int checkFile(const char *fname)
{
unsigned i;
/* Check if fname is '.' or '..'; if so, return false */
if (fname[0] == '.' && (!fname[1] || (fname[1] == '.' && !fname[2])))
return 0;
/* Check if fname is ending in a taboo-extension; if so, return false */
for (i = 0; i < tabooCount; i++) {
const char *pattern = tabooPatterns[i];
if (!fnmatch(pattern, fname, FNM_PERIOD))
{
message(MESS_DEBUG, "Ignoring %s, because of %s pattern match\n",
fname, pattern);
return 0;
}
}
/* All checks have been passed; return true */
return 1;
}
/* Used by qsort to sort filelist */
static int compar(const void *p, const void *q)
{
return strcoll(*((char * const*) p), *((char * const*) q));
}
/* Free memory blocks pointed to by pointers in a 2d array and the array itself */
static void free_2d_array(char **array, unsigned lines_count)
{
unsigned i;
for (i = 0; i < lines_count; ++i)
free(array[i]);
free(array);
}
#define MEMBER_COPY(dest, src) \
do { \
if ((src) && rv == 0) { \
(dest) = strdup(src); \
if ((dest) == NULL) { \
message_OOM(); \
rv = 1; \
} \
} else { \
(dest) = NULL; \
} \
} while (0)
static int copyLogInfo(struct logInfo *to, const struct logInfo *from)
{
int rv = 0;
memset(to, 0, sizeof(*to));
MEMBER_COPY(to->oldDir, from->oldDir);
to->criterium = from->criterium;
to->weekday = from->weekday;
to->threshold = from->threshold;
to->minsize = from->minsize;
to->maxsize = from->maxsize;
to->rotateCount = from->rotateCount;
to->rotateMinAge = from->rotateMinAge;
to->rotateAge = from->rotateAge;
to->logStart = from->logStart;
MEMBER_COPY(to->pre, from->pre);
MEMBER_COPY(to->post, from->post);
MEMBER_COPY(to->first, from->first);
MEMBER_COPY(to->last, from->last);
MEMBER_COPY(to->preremove, from->preremove);
MEMBER_COPY(to->logAddress , from->logAddress);
MEMBER_COPY(to->extension, from->extension);
MEMBER_COPY(to->compress_prog, from->compress_prog);
MEMBER_COPY(to->uncompress_prog, from->uncompress_prog);
MEMBER_COPY(to->compress_ext, from->compress_ext);
to->flags = from->flags;
to->shred_cycles = from->shred_cycles;
to->createMode = from->createMode;
to->createUid = from->createUid;
to->createGid = from->createGid;
to->suUid = from->suUid;
to->suGid = from->suGid;
to->olddirMode = from->olddirMode;
to->olddirUid = from->olddirUid;
to->olddirGid = from->olddirGid;
if (from->compress_options_count) {
poptDupArgv(from->compress_options_count, from->compress_options_list,
&to->compress_options_count, &to->compress_options_list);
if (to->compress_options_list == NULL) {
message_OOM();
rv = 1;
}
}
MEMBER_COPY(to->dateformat, from->dateformat);
to->list = from->list;
return rv;
}
#undef MEMBER_COPY
static void freeLogInfo(struct logInfo *log)
{
free(log->pattern);
free_2d_array(log->files, log->numFiles);
free(log->oldDir);
free(log->pre);
free(log->post);
free(log->first);
free(log->last);
free(log->preremove);
free(log->logAddress);
free(log->extension);
free(log->compress_prog);
free(log->uncompress_prog);
free(log->compress_ext);
free(log->compress_options_list);
free(log->dateformat);
}
static struct logInfo *newLogInfo(const struct logInfo *template)
{
struct logInfo *new;
new = malloc(sizeof(*new));
if (new == NULL) {
message_OOM();
return NULL;
}
if (copyLogInfo(new, template)) {
freeLogInfo(new);
free(new);
return NULL;
}
TAILQ_INSERT_TAIL(&logs, new, list);
numLogs++;
return new;
}
static void removeLogInfo(struct logInfo *log)
{
if (log == NULL)
return;
freeLogInfo(log);
TAILQ_REMOVE(&logs, log, list);
free(log);
numLogs--;
}
static void freeTailLogs(int num)
{
message(MESS_DEBUG, "removing last %d log configs\n", num);
while (num--)
removeLogInfo(TAILQ_LAST(&logs, logInfoHead));
}
static const char *crit_to_string(enum criterium crit)
{
switch (crit) {
case ROT_HOURLY: return "hourly";
case ROT_DAYS: return "daily";
case ROT_WEEKLY: return "weekly";
case ROT_MONTHLY: return "monthly";
case ROT_YEARLY: return "yearly";
case ROT_SIZE: return "size";
default: return "XXX";
}
}
static void set_criterium(enum criterium *pDst, enum criterium src, int *pSet)
{
if (*pSet && (*pDst != src)) {
/* we are overriding a previously set criterium */
message(MESS_DEBUG, "note: '%s' overrides previously specified '%s'\n",
crit_to_string(src), crit_to_string(*pDst));
}
*pDst = src;
*pSet = 1;
}
static int readConfigPath(const char *path, struct logInfo *defConfig)
{
struct stat sb;
int result = 0;
struct logInfo defConfigBackup;
if (stat(path, &sb)) {
message(MESS_ERROR, "cannot stat %s: %s\n", path, strerror(errno));
return 1;
}
if (S_ISDIR(sb.st_mode)) {
char **namelist = NULL;
struct dirent *dp;
int here;
unsigned files_count = 0, i;
DIR *dirp;
if ((here = open(".", O_RDONLY)) == -1) {
message(MESS_ERROR, "cannot open current directory: %s\n",
strerror(errno));
return 1;
}
if ((dirp = opendir(path)) == NULL) {
message(MESS_ERROR, "cannot open directory %s: %s\n", path,
strerror(errno));
close(here);
return 1;
}
while ((dp = readdir(dirp)) != NULL) {
if (checkFile(dp->d_name)) {
/* Realloc memory for namelist array if necessary */
if (files_count % REALLOC_STEP == 0) {
char **p = (char **) realloc(namelist,
(files_count +
REALLOC_STEP) * sizeof(char *));
if (p) {
namelist = p;
memset(namelist + files_count, '\0',
REALLOC_STEP * sizeof(char *));
} else {
free_2d_array(namelist, files_count);
closedir(dirp);
close(here);
message_OOM();
return 1;
}
}
/* Alloc memory for file name */
namelist[files_count] = strdup(dp->d_name);
if (namelist[files_count] != NULL) {
files_count++;
} else {
free_2d_array(namelist, files_count);
closedir(dirp);
close(here);
message_OOM();
return 1;
}
}
}
closedir(dirp);
if (files_count > 0) {
qsort(namelist, files_count, sizeof(char *), compar);
} else {
close(here);
return 0;
}
if (chdir(path)) {
message(MESS_ERROR, "error in chdir(\"%s\"): %s\n", path,
strerror(errno));
close(here);
free_2d_array(namelist, files_count);
return 1;
}
for (i = 0; i < files_count; ++i) {
assert(namelist[i] != NULL);
if (copyLogInfo(&defConfigBackup, defConfig)) {
freeLogInfo(&defConfigBackup);
close(here);
free_2d_array(namelist, files_count);
return 1;
}
if (readConfigFile(namelist[i], defConfig)) {
message(MESS_ERROR, "found error in file %s, skipping\n", namelist[i]);
freeLogInfo(defConfig);
if (copyLogInfo(defConfig, &defConfigBackup)){} /* do not check, we are already in a error path */
freeLogInfo(&defConfigBackup);
result = 1;
continue;
}
freeLogInfo(&defConfigBackup);
}
if (fchdir(here) < 0) {
message(MESS_ERROR, "could not change directory to '.': %s\n", strerror(errno));
}
close(here);
free_2d_array(namelist, files_count);
} else {
if (copyLogInfo(&defConfigBackup, defConfig)) {
freeLogInfo(&defConfigBackup);
return 1;
}
if (readConfigFile(path, defConfig)) {
freeLogInfo(defConfig);
if (copyLogInfo(defConfig, &defConfigBackup)){} /* do not check, we are already in a error path */
result = 1;
}
freeLogInfo(&defConfigBackup);
}
return result;
}
int readAllConfigPaths(const char **paths)
{
int result = 0;
unsigned i;
const char **file;
struct logInfo defConfig = {
.pattern = NULL,
.files = NULL,
.numFiles = 0,
.oldDir = NULL,
.criterium = ROT_SIZE,
.threshold = 1024 * 1024,
.minsize = 0,
.maxsize = 0,
.rotateCount = 0,
.rotateMinAge = 0,
.rotateAge = 0,
.logStart = 1,
.pre = NULL,
.post = NULL,
.first = NULL,
.last = NULL,
.preremove = NULL,
.logAddress = NULL,
.extension = NULL,
.addextension = NULL,
.compress_prog = NULL,
.uncompress_prog = NULL,
.compress_ext = NULL,
.dateformat = NULL,
.flags = LOG_FLAG_IFEMPTY,
.shred_cycles = 0,
.createMode = NO_MODE,
.createUid = NO_UID,
.createGid = NO_GID,
.olddirMode = NO_MODE,
.olddirUid = NO_UID,
.olddirGid = NO_GID,
.suUid = NO_UID,
.suGid = NO_GID,
.compress_options_list = NULL,
.compress_options_count = 0
};
tabooPatterns = malloc(sizeof(*tabooPatterns) * defTabooCount);
if (tabooPatterns == NULL) {
message_OOM();
return 1;
}
for (i = 0; i < defTabooCount; i++) {
char *pattern = NULL;
/* generate a pattern by concatenating star (wildcard) to the
* suffix literal
*/
if (asprintf(&pattern, "*%s", defTabooExts[i]) < 0) {
free_2d_array(tabooPatterns, tabooCount);
message_OOM();
return 1;
}
tabooPatterns[i] = pattern;
tabooCount++;
}
for (file = paths; *file; file++) {
if (readConfigPath(*file, &defConfig))
result = 1;
}
free_2d_array(tabooPatterns, tabooCount);
freeLogInfo(&defConfig);
return result;
}
static char* parseGlobString(const char *configFile, int lineNum,
const char *buf, size_t length, char **ppos)
{
/* output buffer */
char *globString = NULL;
size_t globStringPos = 0;
size_t globStringAlloc = 0;
enum {
PGS_INIT, /* picking blanks, looking for '#' */
PGS_DATA, /* picking data, looking for end of line */
PGS_COMMENT /* skipping comment, looking for end of line */
} state = PGS_INIT;
/* move the cursor at caller's side while going through the input */
for (; ((size_t)(*ppos - buf) < length) && **ppos; (*ppos)++) {
/* state transition (see above) */
switch (state) {
case PGS_INIT:
if ('#' == **ppos)
state = PGS_COMMENT;
else if (!isspace((unsigned char) **ppos))
state = PGS_DATA;
break;
default:
if ('\n' == **ppos)
state = PGS_INIT;
}
if (PGS_COMMENT == state)
/* skip comment */
continue;
switch (**ppos) {
case '}':
message(MESS_ERROR, "%s:%d unexpected } (missing previous '{')\n", configFile, lineNum);
free(globString);
return NULL;
case '{':
/* NUL-terminate globString */
assert(globStringPos < globStringAlloc);
globString[globStringPos] = '\0';
return globString;
default:
break;
}
/* grow the output buffer if needed */
if (globStringPos + 2 > globStringAlloc) {
char *ptr;
globStringAlloc += GLOB_STR_REALLOC_STEP;
ptr = realloc(globString, globStringAlloc);
if (!ptr) {
message_OOM();
free(globString);
return NULL;
}
globString = ptr;
}
/* copy a single character */
globString[globStringPos++] = **ppos;
}
/* premature end of input */
message(MESS_ERROR, "%s:%d missing '{' after log files definition\n", configFile, lineNum);
free(globString);
return NULL;
}
static int globerr(const char *pathname, int theerr)
{
(void) pathname;
/* prevent glob() from being aborted in certain cases */
switch (theerr) {
case ENOTDIR:
/* non-directory where directory was expected by the glob */
return 0;
case ENOENT:
/* most likely symlink with non-existent target */
return 0;
default:
break;
}
glob_errno = theerr;
/* We want the glob operation to abort on error, so return 1 */
return 1;
}
static int expand_home_relative_path(char **path)
{
const char *env_home;
char *new_path = NULL;
if (!*path || (*path)[0] != '~' || (*path)[1] != '/')
return 0;
env_home = secure_getenv("HOME");
if (!env_home) {
const struct passwd *pwd;
message(MESS_DEBUG,
"cannot get HOME directory from environment "
"to replace ~/, trying password database...\n");
pwd = getpwuid(getuid());
if (!pwd) {
message(MESS_ERROR, "cannot get passwd entry for "
"running user %u: %s\n",
getuid(), strerror(errno));
return 1;
}
env_home = pwd->pw_dir;
}
if (asprintf(&new_path, "%s/%s", env_home, *path + 2) < 0) {
message_OOM();
return 1;
}
message(MESS_DEBUG, "replaced '%s' with '%s'\n",
*path, new_path);
free(*path);
*path = new_path;
return 0;
}
#define freeLogItem(what) \
do { \
free(newlog->what); \
newlog->what = NULL; \
} while (0)
#define RAISE_ERROR() \
do { \
if (newlog != defConfig) { \
state = STATE_ERROR; \
goto next_state; \
} else { \
goto error; \
} \
} while (0)
#define MAX_NESTING 16U
static int readConfigFile(const char *configFile, struct logInfo *defConfig)