diff options
| -rw-r--r-- | platform-tracing.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/platform-tracing.c b/platform-tracing.c index c2810f2d..80488bf7 100644 --- a/platform-tracing.c +++ b/platform-tracing.c @@ -32,6 +32,7 @@ #include <stdarg.h> #include <stdio.h> #include <string.h> +#include <unistd.h> #include "log.h" @@ -42,7 +43,16 @@ platform_disable_tracing(int strict) /* On FreeBSD, we should make this process untraceable */ int disable_trace = PROC_TRACE_CTL_DISABLE; - if (procctl(P_PID, 0, PROC_TRACE_CTL, &disable_trace) && strict) + /* + * On FreeBSD, we should make this process untraceable. + * pid=0 means "this process" and but some older kernels do not + * understand that, so retry with our own pid before failing. + */ + if (procctl(P_PID, 0, PROC_TRACE_CTL, &disable_trace) == 0) + return; + if (procctl(P_PID, getpid(), PROC_TRACE_CTL, &disable_trace) == 0) + return; + if (strict) fatal("unable to make the process untraceable: %s", strerror(errno)); #endif |