Magisk/jni/utils/log_monitor.c

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/* log_monitor.c - New thread to monitor logcat
*
* Open a new thread to call logcat and get logs with tag "Magisk"
* Also, write the logs to a log file for debugging purpose
*
*/
#include <stdio.h>
#include <pthread.h>
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#include "magisk.h"
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#include "utils.h"
static void *logger_thread(void *args) {
rename("/cache/magisk.log", "/cache/last_magisk.log");
FILE *logfile = xfopen("/cache/magisk.log", "w");
// Disable buffering
setbuf(logfile, NULL);
// Start logcat
FILE *p = popen("logcat -s Magisk", "r");
while (fgets(magiskbuf, BUF_SIZE, p)) {
fprintf(logfile, "%s", magiskbuf);
}
return NULL;
}
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/* Start a new thread to monitor logcat and dump to logfile */
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void monitor_logs() {
pthread_t log_monitor;
pthread_create(&log_monitor, NULL, logger_thread, NULL);
}