*/
#define _LGPL_SOURCE
+#include <getopt.h>
#include <assert.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <poll.h>
#include <errno.h>
#include "utils.h"
+#include "signal-helper.h"
#define TRACEPOINT_DEFINE
#include "tp.h"
-void create_file(const char *path)
+static
+int create_file(const char *path)
{
- static bool file_created = false;
int ret;
- if (!path || file_created) {
- return;
+ if (!path) {
+ return -1;
}
ret = creat(path, S_IRWXU);
if (ret < 0) {
- fprintf(stderr, "Failed to create file %s\n", path);
- return;
+ perror("creat");
+ return -1;
+ }
+
+ ret = close(ret);
+ if (ret < 0) {
+ perror("close");
+ return -1;
}
- (void) close(ret);
- file_created = true;
+ return 0;
}
static
-void wait_on_file(const char *path)
+int wait_on_file(const char *path)
{
+ int ret;
+ struct stat buf;
+
if (!path) {
- return;
+ return -1;
}
- for (;;) {
- int ret;
- struct stat buf;
+ for (;;) {
ret = stat(path, &buf);
if (ret == -1 && errno == ENOENT) {
- (void) poll(NULL, 0, 10); /* 10 ms delay */
+ ret = poll(NULL, 0, 10); /* 10 ms delay */
+ /* Should return 0 everytime */
+ if (ret) {
+ if (ret < 0) {
+ perror("perror");
+ } else {
+ fprintf(stderr,
+ "poll return value is larger than zero\n");
+ }
+ return -1;
+ }
continue; /* retry */
}
if (ret) {
perror("stat");
- exit(EXIT_FAILURE);
+ return -1;
}
break; /* found */
}
+
+ return 0;
}
+static struct option long_options[] =
+{
+ /* These options set a flag. */
+ {"iter", required_argument, 0, 'i'},
+ {"wait", required_argument, 0, 'w'},
+ {"sync-after-first-event", required_argument, 0, 'a'},
+ {"sync-before-last-event", required_argument, 0, 'b'},
+ {0, 0, 0, 0}
+};
+
int main(int argc, char **argv)
{
unsigned int i, netint;
+ int option_index;
+ char option_char;
long values[] = { 1, 2, 3 };
char text[10] = "test";
double dbl = 2.0;
float flt = 2222.0;
- int nr_iter = 100, ret = 0;
+ int nr_iter = 100, ret = 0, first_event_file_created = 0;
useconds_t nr_usec = 0;
char *after_first_event_file_path = NULL;
char *before_last_event_file_path = NULL;
- if (argc >= 2) {
- /*
- * If nr_iter is negative, do an infinite tracing loop.
- */
- nr_iter = atoi(argv[1]);
+ while((option_char = getopt_long(argc, argv, "i:w:a:b:c:d:", long_options, &option_index)) != -1) {
+ switch (option_char) {
+ case 'a':
+ after_first_event_file_path = strdup(optarg);
+ break;
+ case 'b':
+ before_last_event_file_path = strdup(optarg);
+ break;
+ case 'i':
+ nr_iter = atoi(optarg);
+ break;
+ case 'w':
+ nr_usec = atoi(optarg);
+ break;
+ case '?':
+ /* getopt_long already printed an error message. */
+ break;
+ default:
+ ret = -1;
+ goto end;
+ }
}
- if (argc >= 3) {
- /* By default, don't wait unless user specifies. */
- nr_usec = atoi(argv[2]);
+ if (optind != argc) {
+ fprintf(stderr, "Error: takes long options only.");
+ ret = -1;
+ goto end;
}
- if (argc >= 4) {
- after_first_event_file_path = argv[3];
- }
- if (argc >= 5) {
- before_last_event_file_path = argv[4];
+ if (set_signal_handler()) {
+ ret = -1;
+ goto end;
}
for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
* Wait on synchronization before writing last
* event.
*/
- wait_on_file(before_last_event_file_path);
+ if (before_last_event_file_path) {
+ ret = wait_on_file(before_last_event_file_path);
+ if (ret != 0) {
+ goto end;
+ }
+ }
}
netint = htonl(i);
tracepoint(tp, tptest, i, netint, values, text,
* First loop we create the file if asked to indicate
* that at least one tracepoint has been hit.
*/
- create_file(after_first_event_file_path);
+ if (after_first_event_file_path && first_event_file_created == 0) {
+ ret = create_file(after_first_event_file_path);
+
+ if (ret != 0) {
+ goto end;
+ } else {
+ first_event_file_created = 1;
+ }
+ }
+
if (nr_usec) {
if (usleep_safe(nr_usec)) {
ret = -1;
goto end;
}
}
+ if (should_quit) {
+ break;
+ }
}
end:
+ free(after_first_event_file_path);
+ free(before_last_event_file_path);
exit(!ret ? EXIT_SUCCESS : EXIT_FAILURE);
}