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Userland: Fix stty not setting control characters

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`AK::Result` does not work if both the error and value types are
integers.
This commit is contained in:
Daniel Bertalan 2021-05-24 16:23:33 +02:00 • committed by Linus Groh
parent 7982f9aa70
commit e401ff0802
1 changed files with 12 additions and 12 deletions
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24
Userland/Utilities/stty.cpp
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@ -318,25 +318,25 @@ Result<void, int> apply_modes(size_t parameter_count, char** raw_parameters, ter
return contains_colon;
};
auto parse_control_character = [&](size_t idx) -> Result<cc_t, int> {
auto parse_control_character = [&](size_t idx) -> Optional<cc_t> {
VERIFY(!parameters[idx].is_empty());
if (parameters[idx] == "^-" || parameters[idx] == "undef") {
// FIXME: disabling characters is a bit wonky right now in TTY.
// We should add the _POSIX_VDISABLE macro.
return (cc_t)0;
return 0;
} else if (parameters[idx][0] == '^' && parameters[idx].length() == 2) {
return (cc_t)toupper(parameters[idx][1]) - 0x40;
return toupper(parameters[idx][1]) - 0x40;
} else if (parameters[idx].starts_with("0x")) {
cc_t value = 0;
if (parameters[idx].length() == 2) {
warnln("Invalid hexadecimal character code {}", parameters[idx]);
return (int)1;
return {};
}
for (size_t i = 2; i < parameters[idx].length(); ++i) {
char ch = tolower(parameters[idx][i]);
if (!isdigit(ch) && !(ch >= 'a' && ch <= 'f')) {
warnln("Invalid hexadecimal character code {}", parameters[idx]);
return (int)1;
return {};
}
value = 16 * value + (isdigit(ch)) ? (ch - '0') : (ch - 'a');
}
@ -347,7 +347,7 @@ Result<void, int> apply_modes(size_t parameter_count, char** raw_parameters, ter
char ch = parameters[idx][i];
if (!(ch >= '0' && ch <= '7')) {
warnln("Invalid octal character code {}", parameters[idx]);
return (int)1;
return {};
}
value = 8 * value + (ch - '0');
}
@ -356,14 +356,14 @@ Result<void, int> apply_modes(size_t parameter_count, char** raw_parameters, ter
auto maybe_value = parameters[idx].to_uint<cc_t>();
if (!maybe_value.has_value()) {
warnln("Invalid decimal character code {}", parameters[idx]);
return (int)1;
return {};
}
return maybe_value.value();
} else if (parameters[idx].length() == 1) {
return parameters[idx][0];
}
warnln("Invalid control character {}", parameters[idx]);
return (int)1;
return {};
};
size_t parameter_idx = 0;
@ -391,10 +391,10 @@ Result<void, int> apply_modes(size_t parameter_count, char** raw_parameters, ter
warnln("No control character specified for {}", cc.name);
return 1;
}
auto control_character_or_error = parse_control_character(++parameter_idx);
if (control_character_or_error.is_error())
return control_character_or_error.error();
t.c_cc[cc.index] = control_character_or_error.value();
auto maybe_control_character = parse_control_character(++parameter_idx);
if (!maybe_control_character.has_value())
return 1;
t.c_cc[cc.index] = maybe_control_character.value();
return {};
}
}