73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/file.h>
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#include <libreborn/log.h>
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#include <libreborn/exec.h>
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// Debug Tag
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const char *reborn_debug_tag = "";
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// Log File
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static int log_fd = -1;
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int reborn_get_log_fd() {
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if (log_fd >= 0) {
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return log_fd;
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}
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// Open Log File
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const char *file = getenv(MCPI_LOG_ENV);
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if (file == NULL) {
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file = "/dev/null";
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}
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log_fd = open(file, O_WRONLY | O_APPEND | O_CLOEXEC);
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// Check FD
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if (log_fd < 0) {
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ERR("Unable To Open Log: %s", strerror(errno));
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}
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// Return
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return reborn_get_log_fd();
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}
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void reborn_lock_log() {
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int ret = flock(reborn_get_log_fd(), LOCK_EX);
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if (ret != 0) {
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ERR("Unable To Lock Log: %s", strerror(errno));
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}
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}
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void reborn_unlock_log() {
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int ret = flock(reborn_get_log_fd(), LOCK_UN);
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if (ret != 0) {
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ERR("Unable To Unlock Log: %s", strerror(errno));
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}
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}
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__attribute__((destructor)) void reborn_close_log() {
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if (log_fd >= 0) {
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close(log_fd);
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log_fd = -1;
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}
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}
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void reborn_set_log(const char *file) {
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// Close Current Log
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reborn_close_log();
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// Set Variable
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set_and_print_env(MCPI_LOG_ENV, file);
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}
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// Debug Logging
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static int should_print_debug_to_stderr() {
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return getenv(MCPI_DEBUG_ENV) != NULL;
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}
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int reborn_get_debug_fd() {
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return should_print_debug_to_stderr() ? STDERR_FILENO : reborn_get_log_fd();
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}
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void reborn_lock_debug() {
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if (!should_print_debug_to_stderr()) {
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reborn_lock_log();
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}
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}
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void reborn_unlock_debug() {
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if (!should_print_debug_to_stderr()) {
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reborn_unlock_log();
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}
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} |