/** A printf-like function for logging.
* @param handle the context handle
* @param prefix caller-specific prefix for the log
* @param fmt output format
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *prefix,
const char *fmt, ...)
{
int ret;
va_list args;
ASSERT(handle != NULL, return -1);
/* check if the logstream is open already, opening it if needed */
if(handle->logstream == NULL) {
handle->logstream = fopen(handle->logfile, "a");
/* if we couldn't open it, we have an issue */
if(handle->logstream == NULL) {
if(errno == EACCES) {
handle->pm_errno = ALPM_ERR_BADPERMS;
} else if(errno == ENOENT) {
handle->pm_errno = ALPM_ERR_NOT_A_DIR;
} else {
handle->pm_errno = ALPM_ERR_SYSTEM;
}
return -1;
}
}
va_start(args, fmt);
ret = _alpm_logaction(handle, prefix, fmt, args);
va_end(args);
return ret;
}
/** A printf-like function for logging.
* @param handle the context handle
* @param fmt output format
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *fmt, ...)
{
int ret;
va_list args;
ASSERT(handle != NULL, return -1);
/* check if the logstream is open already, opening it if needed */
if(handle->logstream == NULL) {
handle->logstream = fopen(handle->logfile, "a");
/* if we couldn't open it, we have an issue */
if(handle->logstream == NULL) {
if(errno == EACCES) {
handle->pm_errno = ALPM_ERR_BADPERMS;
} else if(errno == ENOENT) {
handle->pm_errno = ALPM_ERR_NOT_A_DIR;
} else {
handle->pm_errno = ALPM_ERR_SYSTEM;
}
return -1;
}
}
va_start(args, fmt);
ret = _alpm_logaction(handle, fmt, args);
va_end(args);
/* TODO We should add a prefix to log strings depending on who called us.
* If logaction was called by the frontend:
* USER: <the frontend log>
* and if called internally:
* ALPM: <the library log>
* Moreover, the frontend should be able to choose its prefix
* (USER by default?):
* pacman: "PACMAN"
* kpacman: "KPACMAN"
* This would allow us to share the log file between several frontends
* and know who does what */
return ret;
}
