src/test/test-signal-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2016 Lennart Poettering
   6 ***/
   7
   8 #include <signal.h>
   9 #include <unistd.h>
  10
  11 #include "log.h"
  12 #include "macro.h"
  13 #include "signal-util.h"
  14 #include "stdio-util.h"
  15 #include "string-util.h"
  16 #include "process-util.h"
  17
  18 #define info(sig) log_info(#sig " = " STRINGIFY(sig) " = %d", sig)
  19
  20 static void test_rt_signals(void) {
  21         info(SIGRTMIN);
  22         info(SIGRTMAX);
  23
  24         /* We use signals SIGRTMIN+0 to SIGRTMIN+24 unconditionally */
  25         assert(SIGRTMAX - SIGRTMIN >= 24);
  26 }
  27
  28 static void test_signal_to_string_one(int val) {
  29         const char *p;
  30
  31         assert_se(p = signal_to_string(val));
  32
  33         assert_se(signal_from_string(p) == val);
  34
  35         p = strjoina("SIG", p);
  36         assert_se(signal_from_string(p) == val);
  37 }
  38
  39 static void test_signal_from_string_one(const char *s, int val) {
  40         const char *p;
  41
  42         assert_se(signal_from_string(s) == val);
  43
  44         p = strjoina("SIG", s);
  45         assert_se(signal_from_string(p) == val);
  46 }
  47
  48 static void test_signal_from_string_number(const char *s, int val) {
  49         const char *p;
  50
  51         assert_se(signal_from_string(s) == val);
  52
  53         p = strjoina("SIG", s);
  54         assert_se(signal_from_string(p) == -EINVAL);
  55 }
  56
  57 static void test_signal_from_string(void) {
  58         char buf[STRLEN("RTMIN+") + DECIMAL_STR_MAX(int) + 1];
  59
  60         test_signal_to_string_one(SIGHUP);
  61         test_signal_to_string_one(SIGTERM);
  62         test_signal_to_string_one(SIGRTMIN);
  63         test_signal_to_string_one(SIGRTMIN+3);
  64         test_signal_to_string_one(SIGRTMAX-4);
  65
  66         test_signal_from_string_one("RTMIN", SIGRTMIN);
  67         test_signal_from_string_one("RTMAX", SIGRTMAX);
  68
  69         xsprintf(buf, "RTMIN+%d", SIGRTMAX-SIGRTMIN);
  70         test_signal_from_string_one(buf, SIGRTMAX);
  71
  72         xsprintf(buf, "RTMIN+%d", INT_MAX);
  73         test_signal_from_string_one(buf, -ERANGE);
  74
  75         xsprintf(buf, "RTMAX-%d", SIGRTMAX-SIGRTMIN);
  76         test_signal_from_string_one(buf, SIGRTMIN);
  77
  78         xsprintf(buf, "RTMAX-%d", INT_MAX);
  79         test_signal_from_string_one(buf, -ERANGE);
  80
  81         test_signal_from_string_one("", -EINVAL);
  82         test_signal_from_string_one("hup", -EINVAL);
  83         test_signal_from_string_one("HOGEHOGE", -EINVAL);
  84
  85         test_signal_from_string_one("RTMIN-5", -EINVAL);
  86         test_signal_from_string_one("RTMIN-    5", -EINVAL);
  87         test_signal_from_string_one("RTMIN    -5", -EINVAL);
  88         test_signal_from_string_one("RTMIN+    5", -EINVAL);
  89         test_signal_from_string_one("RTMIN    +5", -EINVAL);
  90         test_signal_from_string_one("RTMIN+100", -ERANGE);
  91         test_signal_from_string_one("RTMIN+-3", -EINVAL);
  92         test_signal_from_string_one("RTMIN++3", -EINVAL);
  93         test_signal_from_string_one("RTMIN+HUP", -EINVAL);
  94         test_signal_from_string_one("RTMIN3", -EINVAL);
  95
  96         test_signal_from_string_one("RTMAX+5", -EINVAL);
  97         test_signal_from_string_one("RTMAX+    5", -EINVAL);
  98         test_signal_from_string_one("RTMAX    +5", -EINVAL);
  99         test_signal_from_string_one("RTMAX-    5", -EINVAL);
 100         test_signal_from_string_one("RTMAX    -5", -EINVAL);
 101         test_signal_from_string_one("RTMAX-100", -ERANGE);
 102         test_signal_from_string_one("RTMAX-+3", -EINVAL);
 103         test_signal_from_string_one("RTMAX--3", -EINVAL);
 104         test_signal_from_string_one("RTMAX-HUP", -EINVAL);
 105
 106         test_signal_from_string_number("3", 3);
 107         test_signal_from_string_number("+5", 5);
 108         test_signal_from_string_number("  +5", 5);
 109         test_signal_from_string_number("10000", -ERANGE);
 110         test_signal_from_string_number("-2", -ERANGE);
 111 }
 112
 113 static void test_block_signals(void) {
 114         sigset_t ss;
 115
 116         assert_se(sigprocmask(0, NULL, &ss) >= 0);
 117
 118         assert_se(sigismember(&ss, SIGUSR1) == 0);
 119         assert_se(sigismember(&ss, SIGALRM) == 0);
 120         assert_se(sigismember(&ss, SIGVTALRM) == 0);
 121
 122         {
 123                 BLOCK_SIGNALS(SIGUSR1, SIGVTALRM);
 124
 125                 assert_se(sigprocmask(0, NULL, &ss) >= 0);
 126                 assert_se(sigismember(&ss, SIGUSR1) == 1);
 127                 assert_se(sigismember(&ss, SIGALRM) == 0);
 128                 assert_se(sigismember(&ss, SIGVTALRM) == 1);
 129
 130         }
 131
 132         assert_se(sigprocmask(0, NULL, &ss) >= 0);
 133         assert_se(sigismember(&ss, SIGUSR1) == 0);
 134         assert_se(sigismember(&ss, SIGALRM) == 0);
 135         assert_se(sigismember(&ss, SIGVTALRM) == 0);
 136 }
 137
 138 static void test_ignore_signals(void) {
 139         assert_se(ignore_signals(SIGINT, -1) >= 0);
 140         assert_se(kill(getpid_cached(), SIGINT) >= 0);
 141         assert_se(ignore_signals(SIGUSR1, SIGUSR2, SIGTERM, SIGPIPE, -1) >= 0);
 142         assert_se(kill(getpid_cached(), SIGUSR1) >= 0);
 143         assert_se(kill(getpid_cached(), SIGUSR2) >= 0);
 144         assert_se(kill(getpid_cached(), SIGTERM) >= 0);
 145         assert_se(kill(getpid_cached(), SIGPIPE) >= 0);
 146         assert_se(default_signals(SIGINT, SIGUSR1, SIGUSR2, SIGTERM, SIGPIPE, -1) >= 0);
 147 }
 148
 149 int main(int argc, char *argv[]) {
 150         test_rt_signals();
 151         test_signal_from_string();
 152         test_block_signals();
 153         test_ignore_signals();
 154
 155         return 0;
 156 }