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bblogger.c
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bblogger.c
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/*
* Copyright (c) 2011, The Bumblebee Project
* Author: Joaquín Ignacio Aramendía samsagax@gmail.com
*
* This file is part of Bumblebee.
*
* Bumblebee is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Bumblebee is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Bumblebee. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* bblogger.c: loggin functions for bumblebee daemon and client
*/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include "bblogger.h"
#include "bbconfig.h"
#define X_BUFFER_SIZE 512
char x_output_buffer[X_BUFFER_SIZE+1]; /* Xorg output buffer */
int x_buffer_pos = 0;/* Xorg output buffer position */
/**
* Initialize log capabilities. Return 0 on success
*/
int bb_init_log(void) {
/* Open Logggin mechanism based on configuration */
if (bb_status.runmode == BB_RUN_DAEMON) {
openlog(DAEMON_NAME, LOG_PID, LOG_DAEMON);
} else {
}
/* Should end with no error by now */
return 0;
}
/**
* Log a message to the current log mechanism.
* Try to keep log messages less than 80 characters.
*/
void bb_log(int priority, char* msg_format, ...) {
switch (priority) {
case LOG_ERR:
if (bb_status.verbosity < VERB_ERR) {
return;
}
break;
case LOG_DEBUG:
if (bb_status.verbosity < VERB_DEBUG) {
return;
}
break;
case LOG_WARNING:
if (bb_status.verbosity < VERB_WARN) {
return;
}
break;
default:
if (bb_status.verbosity < VERB_INFO) {
return;
}
break;
}
va_list args;
va_start(args, msg_format);
if (bb_status.runmode == BB_RUN_DAEMON) {
vsyslog(priority, msg_format, args);
} else {
char* fullmsg_fmt = malloc(BUFFER_SIZE + 8);
switch (priority) {
case LOG_ERR:
fullmsg_fmt = strcpy(fullmsg_fmt, "[ERROR]");
break;
case LOG_DEBUG:
fullmsg_fmt = strcpy(fullmsg_fmt, "[DEBUG]");
break;
case LOG_WARNING:
fullmsg_fmt = strcpy(fullmsg_fmt, "[WARN]");
break;
default:
fullmsg_fmt = strcpy(fullmsg_fmt, "[INFO]");
}
fullmsg_fmt = strncat(fullmsg_fmt, msg_format, BUFFER_SIZE);
vfprintf(stderr, fullmsg_fmt, args);
free(fullmsg_fmt);
}
va_end(args);
}
/**
* Close logging mechanism
*/
void bb_closelog(void) {
if (bb_status.runmode == BB_RUN_DAEMON) {
closelog();
}
}
/** Parses a single null-terminated string of Xorg output.
* Will call bb_log appropiately.
*/
static void parse_xorg_output(char * string){
int prio = LOG_DEBUG;/* most lines are debug messages */
char * valid = 0; /* Helper for finding correct ConnectedMonitor setting */
char * valid_end = 0; /* Helper for finding correct ConnectedMonitor setting */
char error_buffer[X_BUFFER_SIZE+8]; /* Temp array for building error lines */
/* Error lines are errors. */
if (strncmp(string, "(EE)", 4) == 0){
/* prefix with [XORG] */
snprintf(error_buffer, X_BUFFER_SIZE+8, "[XORG] %s", string);
set_bb_error(error_buffer);//set as error
/* errors are handled seperately from the rest - return */
return;
}
/* Warning lines are warnings. */
if (strncmp(string, "(WW)", 4) == 0){
prio = LOG_WARNING;
/* recognize some of the less useful nouveau/nvidia warnings, degrade them to LOG_INFO level. */
if (strstr(string, "trying again")){prio = LOG_INFO;}/* nouveau: warning about no outputs being found connected */
if (strstr(string, "initial framebuffer")){prio = LOG_INFO;}/* nouveau: warning for set resolution with no screen attached */
if (strstr(string, "looking for one")){prio = LOG_INFO;}/* nouveau: no keyboard/mouse warning */
if (strstr(string, "EDID")){prio = LOG_INFO;}/* nvidia: cannot read EDID warning */
/* Recognize nvidia complaining about ConnectedMonitor setting */
if (strstr(string, "valid display devices are")){
valid = strstr(string, "'");//find the '-character
if (valid){
valid_end = ++valid;/* advance valid one character, start searching for end */
while (valid_end[0] != 0){
if (valid_end[0] == '\'' || valid_end[0] == ',' || valid_end[0] == ' '){
valid_end[0] = 0;
break;
}
valid_end++;
}
set_bb_error(0); /* Clear error message, we want to override it even though it is not first */
snprintf(error_buffer, X_BUFFER_SIZE+8, "You need to change the ConnectedMonitor setting in %s to %s", bb_config.x_conf_file, valid);
set_bb_error(error_buffer);//set as error
/* Restore the string, sort of (lazy replace with ' even though it could be space or comma). */
valid_end[0] = '\'';
}
}
}
/* do the actual logging */
bb_log(prio, "[XORG] %s\n", string);
}
/** Will check the xorg output pipe and parse any waiting messages.
* Doesn't take any parameters and doesn't return anything.
*/
void check_xorg_pipe(void){
if (bb_status.x_pipe[0] == -1){return;}
int repeat;
do{
repeat = 0;
/* attempt to read at most the entire buffer full. */
int r = read(bb_status.x_pipe[0], x_output_buffer+x_buffer_pos, X_BUFFER_SIZE-x_buffer_pos);
if (r > 0){
x_buffer_pos += r;
if (x_buffer_pos == X_BUFFER_SIZE){repeat = 1;}/* ensure we read all we can */
}else{
if (r == 0 || (errno != EAGAIN && r == -1)){
/* the pipe is closed/invalid. Clean up. */
if (bb_status.x_pipe[0] != -1){close(bb_status.x_pipe[0]); bb_status.x_pipe[0] = -1;}
if (bb_status.x_pipe[1] != -1){close(bb_status.x_pipe[1]); bb_status.x_pipe[1] = -1;}
}
}
/* while x_buffer_pos>0 and a \n is in the buffer, parse.
* if buffer is full, parse also. */
while (x_buffer_pos > 0){
x_output_buffer[X_BUFFER_SIZE] = 0;//make sure there's a terminating null byte
char * foundnewline = strchr(x_output_buffer, '\n');
if (!foundnewline || foundnewline-x_output_buffer > x_buffer_pos){
/* cancel search if no newline, try again later
* except if buffer is full, then parse */
if (x_buffer_pos == X_BUFFER_SIZE){
parse_xorg_output(x_output_buffer);
x_buffer_pos = 0;
}
break;
}
foundnewline[0] = 0;/* convert newline to null byte */
parse_xorg_output(x_output_buffer);/* parse the line */
int size = foundnewline - x_output_buffer + 1;
x_buffer_pos -= size;/* cut the parsed part from the buffer size */
if (x_buffer_pos > 0){/* move the unparsed part left, if any */
memmove(x_output_buffer, foundnewline + 1, x_buffer_pos);
}
}
}while(repeat);
}/* check_xorg_pipe */