/**
* opd_open_files - open necessary files
*
* Open the device files and the log file,
* and mmap() the hash map.
*/
static void opd_open_files(void)
{
devfd = op_open_device("/dev/oprofile/buffer");
if (devfd == -1) {
if (errno == EINVAL)
fprintf(stderr, "Failed to open device. Possibly you have passed incorrect\n"
"parameters. Check /var/log/messages.");
else
perror("Failed to open profile device");
exit(EXIT_FAILURE);
}
/* give output before re-opening stdout as the logfile */
printf("Using log file %s\n", op_log_file);
/* set up logfile */
close(0);
close(1);
if (open("/dev/null", O_RDONLY) == -1) {
perror("oprofiled: couldn't re-open stdin as /dev/null: ");
exit(EXIT_FAILURE);
}
opd_open_logfile();
opd_create_pipe();
printf("oprofiled started %s", op_get_time());
printf("kernel pointer size: %lu\n",
(unsigned long)kernel_pointer_size);
fflush(stdout);
}
static void op_open_files(void)
{
hashmapdevfd = op_open_device(op_hash_device);
if (hashmapdevfd == -1) {
perror("Failed to open hash map device");
exit(EXIT_FAILURE);
}
notedevfd = op_open_device(op_note_device);
if (notedevfd == -1) {
if (errno == EINVAL)
fprintf(stderr, "Failed to open note device. Possibly you have passed incorrect\n"
"parameters. Check /var/log/messages.");
else
perror("Failed to open note device");
exit(EXIT_FAILURE);
}
devfd = op_open_device(op_device);
if (devfd == -1) {
if (errno == EINVAL)
fprintf(stderr, "Failed to open device. Possibly you have passed incorrect\n"
"parameters. Check /var/log/messages.");
else
perror("Failed to open profile device");
exit(EXIT_FAILURE);
}
opd_init_hash_map();
printf("Using log file %s\n", op_log_file);
close(0);
close(1);
if (open("/dev/null", O_RDONLY) == -1) {
perror("oprofiled: couldn't re-open stdin as /dev/null: ");
exit(EXIT_FAILURE);
}
opd_open_logfile();
printf("oprofiled started %s", op_get_time());
fflush(stdout);
}
