156 lines
3.6 KiB
C
156 lines
3.6 KiB
C
/* log_monitor.c - New thread to monitor logcat
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*
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* A universal logcat monitor for many usages. Add listeners to the list,
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* and the pointer of the new log line will be sent through pipes to trigger
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* asynchronous events without polling
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*/
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#include <stdio.h>
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#include <limits.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include "magisk.h"
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#include "utils.h"
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int logcat_events[] = { -1, -1, -1 };
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extern int is_restart;
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#ifdef MAGISK_DEBUG
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static int debug_log_pid, debug_log_fd;
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#endif
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static void *logger_thread(void *args) {
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int log_fd = -1, log_pid;
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char line[4096];
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LOGD("log_monitor: logger start");
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while (1) {
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// Start logcat
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log_pid = exec_command(0, &log_fd, NULL, "logcat", "-b", "all" , "-v", "threadtime", "-s", "am_proc_start", "Magisk", NULL);
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while (fdgets(line, sizeof(line), log_fd)) {
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for (int i = 0; i < (sizeof(logcat_events) / sizeof(int)); ++i) {
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if (logcat_events[i] > 0) {
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char *s = strdup(line);
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xwrite(logcat_events[i], &s, sizeof(s));
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}
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}
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if (kill(log_pid, 0))
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break;
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}
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// Clear buffer if restart required
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exec_command_sync("logcat", "-b", "all", "-c", NULL);
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}
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// Should never be here, but well...
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return NULL;
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}
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static void *magisk_log_thread(void *args) {
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int have_data = 0;
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// Temp buffer for logs before we have data access
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struct vector logs;
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vec_init(&logs);
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FILE *log;
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int pipefd[2];
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if (xpipe2(pipefd, O_CLOEXEC) == -1)
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return NULL;
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// Register our listener
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logcat_events[LOG_EVENT] = pipefd[1];
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LOGD("log_monitor: magisk log dumper start");
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for (char *line; xxread(pipefd[0], &line, sizeof(line)) > 0; free(line)) {
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char *ss;
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if ((ss = strstr(line, " Magisk")) && (ss[-1] != 'D') && (ss[-1] != 'V')) {
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if (!have_data) {
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if ((have_data = check_data())) {
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// Dump buffered logs to file
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if (!is_restart)
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rename(LOGFILE, LASTLOG);
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log = xfopen(LOGFILE, "a");
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setbuf(log, NULL);
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char *tmp;
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vec_for_each(&logs, tmp) {
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fprintf(log, "%s", tmp);
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free(tmp);
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}
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vec_destroy(&logs);
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} else {
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vec_push_back(&logs, strdup(line));
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}
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}
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if (have_data)
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fprintf(log, "%s", line);
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}
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}
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return NULL;
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}
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static void *debug_magisk_log_thread(void *args) {
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FILE *log = xfopen(DEBUG_LOG, "a");
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setbuf(log, NULL);
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int pipefd[2];
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if (xpipe2(pipefd, O_CLOEXEC) == -1)
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return NULL;
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LOGD("log_monitor: debug log dumper start");
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// Register our listener
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logcat_events[DEBUG_EVENT] = pipefd[1];
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for (char *line; xxread(pipefd[0], &line, sizeof(line)) > 0; free(line)) {
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char *ss;
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if ((ss = strstr(line, "Magisk")))
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fprintf(log, "%s", line);
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}
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return NULL;
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}
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/* Start new threads to monitor logcat and dump to logfile */
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void monitor_logs() {
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pthread_t thread;
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// Start log file dumper before monitor
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xpthread_create(&thread, NULL, magisk_log_thread, NULL);
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pthread_detach(thread);
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// Start logcat monitor
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xpthread_create(&thread, NULL, logger_thread, NULL);
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pthread_detach(thread);
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}
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void start_debug_full_log() {
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#ifdef MAGISK_DEBUG
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// Log everything initially
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debug_log_fd = xopen(DEBUG_LOG, O_WRONLY | O_CREAT | O_CLOEXEC | O_TRUNC, 0644);
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debug_log_pid = exec_command(0, &debug_log_fd, NULL, "logcat", "-v", "threadtime", NULL);
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close(debug_log_fd);
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#endif
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}
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void stop_debug_full_log() {
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#ifdef MAGISK_DEBUG
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// Stop recording the boot logcat after every boot task is done
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kill(debug_log_pid, SIGTERM);
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waitpid(debug_log_pid, NULL, 0);
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// Start debug thread
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start_debug_log();
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#endif
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}
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void start_debug_log() {
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#ifdef MAGISK_DEBUG
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pthread_t thread;
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// Start debug thread
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xpthread_create(&thread, NULL, debug_magisk_log_thread, NULL);
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pthread_detach(thread);
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#endif
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}
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