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#include "ringlogger.h"
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/wait.h>
static void forkwrite(void)
{
struct log *log = open_log("/tmp/test_log");
char c[512];
int i, base;
bool in_fork = !fork();
base = 10000 * in_fork;
for (i = 0; i < 1024; ++i) {
snprintf(c, 512, "bla bla bla %d", base + i);
write_msg_to_log(log, "HMM", c);
}
if (in_fork)
_exit(0);
wait(NULL);
write_log_to_file("/dev/stdout", log);
close_log(log);
}
static void writetext(const char *text)
{
struct log *log = open_log("/tmp/test_log");
write_msg_to_log(log, "TXT", text);
close_log(log);
}
static void show_line(const char *line, uint64_t time_ns)
{
printf("%" PRIu64 ": %s\n", time_ns, line);
}
static void follow(void)
{
uint32_t cursor = -1;
struct log *log = open_log("/tmp/test_log");
for (;;) {
cursor = view_lines_from_cursor(log, cursor, show_line);
usleep(1000 * 300);
}
}
int main(int argc, char *argv[])
{
if (!strcmp(argv[1], "fork"))
forkwrite();
else if (!strcmp(argv[1], "write"))
writetext(argv[2]);
else if (!strcmp(argv[1], "follow"))
follow();
return 0;
}
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