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#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include "timestamp.h"
static int fd;
static void on_sigint(int sig)
{
close(fd);
exit(0);
}
static int enable_events(int fd, char* str)
{
unsigned long id;
unsigned long cmd[3];
if (!str2event(str, &id))
return 0;
cmd[0] = ENABLE_CMD;
cmd[1] = id;
cmd[2] = id + 1;
return write(fd, cmd, 3 * sizeof(long)) == 3 * sizeof(long);
}
static void cat2stdout(int fd)
{
static char buf[4096];
int rd;
while ((rd = read(fd, buf, 4096)))
fwrite(buf, 1, rd, stdout);
}
static void usage(void)
{
fprintf(stderr,
"Usage: ftcat <ft device> TS1 TS2 ....\n\n"
// "where TS1, TS2, ... is one of "
// " sched, tick, plug_tick, plug_sche"
"\n");
exit(1);
}
int main(int argc, char** argv)
{
if (argc < 3)
usage();
fd = open(argv[1], O_RDWR);
if (fd < 0) {
perror("could not open feathertrace");
return 1;
}
argc -= 2;
argv += 2;
signal(SIGINT,on_sigint);
while (argc--) {
if (!enable_events(fd, *argv)) {
fprintf(stderr, "Enabling %s failed.\n", *argv);
return 2;
}
argv++;
}
cat2stdout(fd);
close(fd);
return 0;
}
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