diff options
Diffstat (limited to 'ctdb/common/ctdb_util.c')
| -rw-r--r-- | ctdb/common/ctdb_util.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/ctdb/common/ctdb_util.c b/ctdb/common/ctdb_util.c index ed322ac8b7f..71dee2b9544 100644 --- a/ctdb/common/ctdb_util.c +++ b/ctdb/common/ctdb_util.c @@ -59,6 +59,30 @@ void ctdb_fatal(struct ctdb_context *ctdb, const char *msg) abort(); } +/* Invoke an external program to do some sort of tracing on the CTDB + * process. This might block for a little while. The external + * program is specified by the environment variable + * CTDB_EXTERNAL_TRACE. This program should take one argument: the + * pid of the process to trace. Commonly, the program would be a + * wrapper script around gcore. + */ +void ctdb_external_trace(void) +{ + + const char * t = getenv("CTDB_EXTERNAL_TRACE"); + char * cmd; + + if (t == NULL) { + return; + } + + cmd = talloc_asprintf(NULL, "%s %lu", t, (unsigned long) getpid()); + DEBUG(DEBUG_WARNING,("begin external trace: %s\n", cmd)); + system(cmd); + DEBUG(DEBUG_WARNING,("end external trace: %s\n", cmd)); + talloc_free(cmd); +} + /* parse a IP:port pair */ @@ -555,6 +579,7 @@ char *ctdb_addr_to_str(ctdb_sock_addr *addr) break; default: DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family)); + ctdb_external_trace(); } return cip; |