| Jiri Olsa | d3b59a3 | 2012-11-10 01:46:42 +0100 | [diff] [blame] | 1 | #include <stdio.h> |
| 2 | #include <unistd.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <sys/types.h> |
| 5 | #include <sys/stat.h> |
| 6 | #include <fcntl.h> |
| 7 | #include "tests.h" |
| 8 | #include "debugfs.h" |
| 9 | |
| 10 | int trace_event__id(const char *evname) |
| 11 | { |
| 12 | char *filename; |
| 13 | int err = -1, fd; |
| 14 | |
| 15 | if (asprintf(&filename, |
| 16 | "%s/syscalls/%s/id", |
| 17 | tracing_events_path, evname) < 0) |
| 18 | return -1; |
| 19 | |
| 20 | fd = open(filename, O_RDONLY); |
| 21 | if (fd >= 0) { |
| 22 | char id[16]; |
| 23 | if (read(fd, id, sizeof(id)) > 0) |
| 24 | err = atoi(id); |
| 25 | close(fd); |
| 26 | } |
| 27 | |
| 28 | free(filename); |
| 29 | return err; |
| 30 | } |