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https://github.com/RGBCube/serenity
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Userland: Teach "kill" to understand signal names (not just numbers)
You can now do things like "kill -STOP pid" :^) The getsignalbyname() helper function should probably move to LibC or somewhere where it can be used by other signal related programs.
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1 changed files with 64 additions and 2 deletions
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@ -26,9 +26,11 @@
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#include <AK/Optional.h>
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#include <AK/String.h>
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#include <ctype.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static void print_usage_and_exit()
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@ -37,6 +39,55 @@ static void print_usage_and_exit()
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exit(1);
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}
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static const char* signal_names[] = {
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"INVAL",
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"HUP",
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"INT",
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"QUIT",
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"ILL",
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"TRAP",
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"ABRT",
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"BUS",
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"FPE",
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"KILL",
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"USR1",
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"SEGV",
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"USR2",
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"PIPE",
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"ALRM",
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"TERM",
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"STKFLT",
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"CHLD",
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"CONT",
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"STOP",
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"TSTP",
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"TTIN",
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"TTOU",
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"URG",
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"XCPU",
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"XFSZ",
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"VTALRM",
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"PROF",
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"WINCH",
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"IO",
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"INFO",
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"SYS"
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};
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static_assert(sizeof(signal_names) == sizeof(const char*) * 32);
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int getsignalbyname(const char* name)
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{
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ASSERT(name);
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for (size_t i = 0; i < NSIG; ++i) {
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auto* signal_name = signal_names[i];
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if (!strcmp(signal_name, name))
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return i;
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}
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errno = EINVAL;
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return -1;
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}
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int main(int argc, char** argv)
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{
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if (pledge("stdio proc", nullptr) < 0) {
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@ -52,9 +103,20 @@ int main(int argc, char** argv)
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pid_argi = 2;
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if (argv[1][0] != '-')
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print_usage_and_exit();
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auto number = StringView(&argv[1][1]).to_uint();
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Optional<unsigned> number;
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if (isalpha(argv[1][1])) {
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int value = getsignalbyname(&argv[1][1]);
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if (value >= 0 && value < NSIG)
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number = value;
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}
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if (!number.has_value())
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number = StringView(&argv[1][1]).to_uint();
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if (!number.has_value()) {
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printf("'%s' is not a valid signal number\n", &argv[1][1]);
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printf("'%s' is not a valid signal name or number\n", &argv[1][1]);
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return 2;
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}
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signum = number.value();
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