diff options
Diffstat (limited to 'runtime/stpd/stpd.c')
| -rw-r--r-- | runtime/stpd/stpd.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/runtime/stpd/stpd.c b/runtime/stpd/stpd.c index e99f4b47..14107664 100644 --- a/runtime/stpd/stpd.c +++ b/runtime/stpd/stpd.c @@ -53,6 +53,7 @@ gid_t cmd_gid; /* relayfs base file name */ static char stpd_filebase[1024]; +#define RELAYFS_MAGIC 0xF0B4A981 /* if no output file name is specified, use this */ #define DEFAULT_OUTFILE_NAME "probe.out" @@ -211,11 +212,11 @@ int main(int argc, char **argv) if (!outfile_name) outfile_name = DEFAULT_OUTFILE_NAME; } - - if (statfs("/mnt/relay", &st) < 0) - sprintf(stpd_filebase, "/proc/systemtap/stap_%d/cpu", driver_pid); - else + + if ((statfs("/mnt/relay", &st) == 0) && (st.f_type == (long) RELAYFS_MAGIC)) sprintf(stpd_filebase, "/mnt/relay/%d/cpu", getpid()); + else + sprintf(stpd_filebase, "/proc/systemtap/stap_%d/cpu", driver_pid); if (init_stp(stpd_filebase, !quiet)) { //fprintf(stderr, "Couldn't initialize stpd. Exiting.\n"); |