utrace: Report ptrace errors

diff --git a/trace/trace.c b/trace/trace.c
index 5189cfb11290baa18c3897a06ee51223ae2676f7..7fe55990e3ca53d00d347337ea6025632ee798ca 100644 (file)
--- a/trace/trace.c
+++ b/trace/trace.c
@@ -25,6 +25,7 @@
 #include <errno.h>
 #include <string.h>
 #include <syslog.h>
 #include <errno.h>
 #include <string.h>
 #include <syslog.h>

+#include <err.h>

 
 #ifndef PTRACE_EVENT_STOP
 /* PTRACE_EVENT_STOP is defined in linux/ptrace.h, but this header
 
 #ifndef PTRACE_EVENT_STOP
 /* PTRACE_EVENT_STOP is defined in linux/ptrace.h, but this header


@@ -360,8 +361,10 @@ int main(int argc, char **argv, char **envp)
                ptrace_restart = PTRACE_CONT;
                break;
        }
                ptrace_restart = PTRACE_CONT;
                break;
        }

-       ptrace(PTRACE_SEIZE, child, 0, ptrace_options);
-       ptrace(ptrace_restart, child, 0, SIGCONT);
+       if (ptrace(PTRACE_SEIZE, child, 0, ptrace_options) == -1)
+               err(1, "PTRACE_SEIZE");
+       if (ptrace(ptrace_restart, child, 0, SIGCONT) == -1)
+               err(1, "ptrace restart");

 
        uloop_init();
        tracer.proc.pid = child;
 
        uloop_init();
        tracer.proc.pid = child;