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Do not access the fd field of the bctbx_file_t as it may not be set by some vfs implementation. Furthermore if the file fails to open bctbx_file_open returns NULL and so accessing the fd field will result in a crash.

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This commit is contained in:
Ghislain MARY 2016-07-19 13:16:19 +02:00
parent 7d9a8dfeca
commit f7a8db5e0f
1 changed files with 16 additions and 33 deletions
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49
coreapi/lpconfig.c
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@ -397,10 +397,6 @@ LpConfig * lp_config_new_from_buffer(const char *buffer){
}
LpConfig *lp_config_new_with_factory(const char *config_filename, const char *factory_config_filename) {
int fd;
bctbx_vfs_file_t* pFile = NULL;
LpConfig *lpconfig=lp_new0(LpConfig,1);
lpconfig->g_bctbx_vfs = bctbx_vfs_get_default();
@ -430,23 +426,20 @@ LpConfig *lp_config_new_with_factory(const char *config_filename, const char *fa
}
}
#endif /*_WIN32*/
/*open with r+ to check if we can write on it later*/
pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,lpconfig->filename, "r+");
fd = pFile->fd;
lpconfig->pFile = pFile;
/*open with r+ to check if we can write on it later*/
lpconfig->pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,lpconfig->filename, "r+");
#ifdef RENAME_REQUIRES_NONEXISTENT_NEW_PATH
if (fd == -1){
pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,lpconfig->tmpfilename, "r+");
if (fd){
if (lpconfig->pFile == NULL){
lpconfig->pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,lpconfig->tmpfilename, "r+");
if (lpconfig->pFile == NULL){
ms_warning("Could not open %s but %s works, app may have crashed during last sync.",lpconfig->filename,lpconfig->tmpfilename);
}
}
#endif
if (fd != -1){
lp_config_parse(lpconfig, pFile);
bctbx_file_close(pFile);
if (lpconfig->pFile != NULL){
lp_config_parse(lpconfig, lpconfig->pFile);
bctbx_file_close(lpconfig->pFile);
lpconfig->pFile = NULL;
lpconfig->modified=0;
}
@ -463,10 +456,8 @@ fail:
int lp_config_read_file(LpConfig *lpconfig, const char *filename){
char* path = lp_realpath(filename, NULL);
int fd=-1;
bctbx_vfs_file_t* pFile = bctbx_file_open(lpconfig->g_bctbx_vfs, path, "r");
fd = pFile->fd;
if (fd != -1){
if (pFile != NULL){
ms_message("Reading config information from %s", path);
lp_config_parse(lpconfig, pFile);
bctbx_file_close(pFile);
@ -927,7 +918,7 @@ static const char *_lp_config_dirname(char *path) {
}
bool_t lp_config_relative_file_exists(const LpConfig *lpconfig, const char *filename) {
bctbx_vfs_file_t *pFile = lpconfig->pFile;
bctbx_vfs_file_t *pFile;
if (lpconfig->filename == NULL) {
return FALSE;
} else {
@ -943,10 +934,10 @@ bool_t lp_config_relative_file_exists(const LpConfig *lpconfig, const char *file
pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,realfilepath, "r");
ms_free(realfilepath);
if (pFile->fd != -1) {
if (pFile != NULL) {
bctbx_file_close(pFile);
}
return pFile->fd > 0;
return pFile != NULL;
}
}
@ -955,9 +946,8 @@ void lp_config_write_relative_file(const LpConfig *lpconfig, const char *filenam
const char *dir = NULL;
char *filepath = NULL;
char *realfilepath = NULL;
int fd = 0;
bctbx_vfs_file_t *pFile;
bctbx_vfs_file_t *pFile = lpconfig->pFile;
if (lpconfig->filename == NULL) return;
if(strlen(data) == 0) {
@ -974,10 +964,8 @@ void lp_config_write_relative_file(const LpConfig *lpconfig, const char *filenam
goto end;
}
pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,realfilepath, "w");
fd = pFile->fd;
if(fd == -1) {
pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,realfilepath, "w");
if(pFile == NULL) {
ms_error("Could not open %s for write", realfilepath);
goto end;
}
@ -994,7 +982,6 @@ int lp_config_read_relative_file(const LpConfig *lpconfig, const char *filename,
char *dup_config_file = NULL;
const char *dir = NULL;
char *filepath = NULL;
int fd = 0;
bctbx_vfs_file_t* pFile = NULL;
char* realfilepath = NULL;
@ -1011,15 +998,11 @@ int lp_config_read_relative_file(const LpConfig *lpconfig, const char *filename,
}
pFile = bctbx_file_open(lpconfig->g_bctbx_vfs,realfilepath,"r");
if (pFile !=NULL)
fd = pFile->fd;
if(fd == -1 ) {
if (pFile == NULL) {
ms_error("Could not open %s for read.", realfilepath);
goto err;
}
if(bctbx_file_read(pFile, data, 1, (off_t)max_length) < 0){
ms_error("%s could not be loaded.", realfilepath);
goto err;