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Diffstat (limited to 'src/afb-debug.c')
-rw-r--r-- | src/afb-debug.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/afb-debug.c b/src/afb-debug.c new file mode 100644 index 00000000..5817f17e --- /dev/null +++ b/src/afb-debug.c @@ -0,0 +1,86 @@ +/* + Copyright 2017 IoT.bzh + + author: José Bollo <jose.bollo@iot.bzh> + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +#include "afb-debug.h" + +#if defined(AFB_INSERT_DEBUG_FEATURES) + +#define _GNU_SOURCE +#include <stdlib.h> +#include <string.h> +#include <signal.h> + +#include "verbose.h" + +static char key_env_break[] = "AFB_DEBUG_BREAK"; +static char key_env_wait[] = "AFB_DEBUG_WAIT"; +static char separs[] = ", \t\n"; + +static int has_key(const char *key, const char *list) +{ + if (list && key) { + list += strspn(list, separs); + while (*list) { + size_t s = strcspn(list, separs); + if (!strncasecmp(list, key, s) && !key[s]) + return 1; + list += s; + list += strspn(list, separs); + } + } + return 0; +} + +static void handler(int signum) +{ +} + +void afb_debug(const char *key) +{ + enum { None, Break, Wait } action; + + if (has_key(key, secure_getenv(key_env_break))) + action = Break; + else if (has_key(key, secure_getenv(key_env_wait))) + action = Wait; + else + action = None; + + if (action != None) { + const char *a = action == Break ? "BREAK" : "WAIT"; + struct sigaction sa, psa; + sigset_t ss; + + NOTICE("DEBUG %s before %s", a, key); + memset(&sa, 0, sizeof sa); + sa.sa_handler = handler; + sigaction(SIGINT, &sa, &psa); + if (action == Break) { + raise(SIGINT); + } else { + sigemptyset(&ss); + sigaddset(&ss, SIGINT); + sigwaitinfo(&ss, NULL); + } + sigaction(SIGINT, &psa, NULL); + NOTICE("DEBUG %s after %s", a, key); + } +} + +#endif + |