tailix/libkernaux
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Implement escaping inside quotes in cmd line parser

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This commit is contained in:
Alex Kotov 2021-12-12 22:10:56 +05:00
parent 2b7fda767d
commit 5504054a22
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
2 changed files with 94 additions and 33 deletions
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21
src/cmdline.c
View file

@ -14,6 +14,7 @@ enum State {
TOKEN,
BACKSLASH,
QUOTE,
QUOTE_BACKSLASH,
};
bool kernaux_cmdline_parse(
@ -206,6 +207,9 @@ bool kernaux_cmdline_parse(
kernaux_strncpy(error_msg, "EOL inside quote", 16);
goto fail;
}
else if (cur == '\\') {
state = QUOTE_BACKSLASH;
}
else if (cur == '"') {
if (buffer_size >= arg_size_max) {
kernaux_strncpy(error_msg, "arg too long", 12);
@ -226,6 +230,23 @@ bool kernaux_cmdline_parse(
++buffer_size;
}
break;
case QUOTE_BACKSLASH:
if (cur == '\0') {
kernaux_strncpy(error_msg, "EOL after backslash inside quote", 32);
goto fail;
}
else {
if (buffer_size >= arg_size_max) {
kernaux_strncpy(error_msg, "arg too long", 12);
goto fail;
}
state = QUOTE;
*(buffer++) = cur;
++buffer_size;
}
break;
}
if (state == FINAL) {

106
tests/test_cmdline.c
View file

@ -119,39 +119,72 @@ int main()
test("\"foo\" \"bar\" \"car\"", 0, 3, false, "arg too long", 0, argv0);
test("\"foo\" \"bar\" \"car\"", 2, 3, false, "arg too long", 0, argv0);
test("\\ ", 0, 0, true, "", 1, argv_space);
test("\\\\", 0, 0, true, "", 1, argv_backslash);
test("\\\"", 0, 0, true, "", 1, argv_quotmark);
test("foo\\ ", 0, 0, true, "", 1, argv_foospace);
test("foo\\\\", 0, 0, true, "", 1, argv_foobackslash);
test("foo\\\"", 0, 0, true, "", 1, argv_fooquotmark);
test("\\ foo", 0, 0, true, "", 1, argv_spacefoo);
test("\\\\foo", 0, 0, true, "", 1, argv_backslashfoo);
test("\\\"foo", 0, 0, true, "", 1, argv_quotmarkfoo);
test("\\ foo\\ ", 0, 0, true, "", 1, argv_spacefoospace);
test("\\\\foo\\\\", 0, 0, true, "", 1, argv_backslashfoobackslash);
test("\\\"foo\\\"", 0, 0, true, "", 1, argv_quotmarkfooquotmark);
test("foo\\ bar", 0, 0, true, "", 1, argv_foospacebar);
test("foo\\\\bar", 0, 0, true, "", 1, argv_foobackslashbar);
test("foo\\\"bar", 0, 0, true, "", 1, argv_fooquotmarkbar);
test("\\ foo bar", 0, 0, true, "", 2, argv_spacefoo_bar);
test("\\\\foo bar", 0, 0, true, "", 2, argv_backslashfoo_bar);
test("\\\"foo bar", 0, 0, true, "", 2, argv_quotmarkfoo_bar);
test("foo\\ bar", 0, 0, true, "", 2, argv_foospace_bar);
test("foo\\\\ bar", 0, 0, true, "", 2, argv_foobackslash_bar);
test("foo\\\" bar", 0, 0, true, "", 2, argv_fooquotmark_bar);
test("\\ foo\\ bar", 0, 0, true, "", 2, argv_spacefoospace_bar);
test("\\\\foo\\\\ bar", 0, 0, true, "", 2, argv_backslashfoobackslash_bar);
test("\\\"foo\\\" bar", 0, 0, true, "", 2, argv_quotmarkfooquotmark_bar);
test("foo \\ bar", 0, 0, true, "", 2, argv_foo_spacebar);
test("foo \\\\bar", 0, 0, true, "", 2, argv_foo_backslashbar);
test("foo \\\"bar", 0, 0, true, "", 2, argv_foo_quotmarkbar);
test("foo bar\\ ", 0, 0, true, "", 2, argv_foo_barspace);
test("foo bar\\\\", 0, 0, true, "", 2, argv_foo_barbackslash);
test("foo bar\\\"", 0, 0, true, "", 2, argv_foo_barquotmark);
test("foo \\ bar\\ ", 0, 0, true, "", 2, argv_foo_spacebarspace);
test("foo \\\\bar\\\\", 0, 0, true, "", 2, argv_foo_backslashbarbackslash);
test("foo \\\"bar\\\"", 0, 0, true, "", 2, argv_foo_quotmarkbarquotmark);
test("\\ ", 0, 0, true, "", 1, argv_space);
test("\"\\ \"", 0, 0, true, "", 1, argv_space);
test("\\\\", 0, 0, true, "", 1, argv_backslash);
test("\"\\\\\"", 0, 0, true, "", 1, argv_backslash);
test("\\\"", 0, 0, true, "", 1, argv_quotmark);
test("\"\\\"\"", 0, 0, true, "", 1, argv_quotmark);
test("foo\\ ", 0, 0, true, "", 1, argv_foospace);
test("\"foo\\ \"", 0, 0, true, "", 1, argv_foospace);
test("foo\\\\", 0, 0, true, "", 1, argv_foobackslash);
test("\"foo\\\\\"", 0, 0, true, "", 1, argv_foobackslash);
test("foo\\\"", 0, 0, true, "", 1, argv_fooquotmark);
test("\"foo\\\"\"", 0, 0, true, "", 1, argv_fooquotmark);
test("\\ foo", 0, 0, true, "", 1, argv_spacefoo);
test("\"\\ foo\"", 0, 0, true, "", 1, argv_spacefoo);
test("\\\\foo", 0, 0, true, "", 1, argv_backslashfoo);
test("\"\\\\foo\"", 0, 0, true, "", 1, argv_backslashfoo);
test("\\\"foo", 0, 0, true, "", 1, argv_quotmarkfoo);
test("\"\\\"foo\"", 0, 0, true, "", 1, argv_quotmarkfoo);
test("\\ foo\\ ", 0, 0, true, "", 1, argv_spacefoospace);
test("\"\\ foo\\ \"", 0, 0, true, "", 1, argv_spacefoospace);
test("\\\\foo\\\\", 0, 0, true, "", 1, argv_backslashfoobackslash);
test("\"\\\\foo\\\\\"", 0, 0, true, "", 1, argv_backslashfoobackslash);
test("\\\"foo\\\"", 0, 0, true, "", 1, argv_quotmarkfooquotmark);
test("\"\\\"foo\\\"\"", 0, 0, true, "", 1, argv_quotmarkfooquotmark);
test("foo\\ bar", 0, 0, true, "", 1, argv_foospacebar);
test("\"foo\\ bar\"", 0, 0, true, "", 1, argv_foospacebar);
test("foo\\\\bar", 0, 0, true, "", 1, argv_foobackslashbar);
test("\"foo\\\\bar\"", 0, 0, true, "", 1, argv_foobackslashbar);
test("foo\\\"bar", 0, 0, true, "", 1, argv_fooquotmarkbar);
test("\"foo\\\"bar\"", 0, 0, true, "", 1, argv_fooquotmarkbar);
test("\\ foo bar", 0, 0, true, "", 2, argv_spacefoo_bar);
test("\"\\ foo\" bar", 0, 0, true, "", 2, argv_spacefoo_bar);
test("\\\\foo bar", 0, 0, true, "", 2, argv_backslashfoo_bar);
test("\"\\\\foo\" bar", 0, 0, true, "", 2, argv_backslashfoo_bar);
test("\\\"foo bar", 0, 0, true, "", 2, argv_quotmarkfoo_bar);
test("\"\\\"foo\" bar", 0, 0, true, "", 2, argv_quotmarkfoo_bar);
test("foo\\ bar", 0, 0, true, "", 2, argv_foospace_bar);
test("\"foo\\ \" bar", 0, 0, true, "", 2, argv_foospace_bar);
test("foo\\\\ bar", 0, 0, true, "", 2, argv_foobackslash_bar);
test("\"foo\\\\\" bar", 0, 0, true, "", 2, argv_foobackslash_bar);
test("foo\\\" bar", 0, 0, true, "", 2, argv_fooquotmark_bar);
test("\"foo\\\"\" bar", 0, 0, true, "", 2, argv_fooquotmark_bar);
test("\\ foo\\ bar", 0, 0, true, "", 2, argv_spacefoospace_bar);
test("\"\\ foo\\ \" bar", 0, 0, true, "", 2, argv_spacefoospace_bar);
test("\\\\foo\\\\ bar", 0, 0, true, "", 2, argv_backslashfoobackslash_bar);
test("\"\\\\foo\\\\\" bar", 0, 0, true, "", 2, argv_backslashfoobackslash_bar);
test("\\\"foo\\\" bar", 0, 0, true, "", 2, argv_quotmarkfooquotmark_bar);
test("\"\\\"foo\\\"\" bar", 0, 0, true, "", 2, argv_quotmarkfooquotmark_bar);
test("foo \\ bar", 0, 0, true, "", 2, argv_foo_spacebar);
test("foo \"\\ bar\"", 0, 0, true, "", 2, argv_foo_spacebar);
test("foo \\\\bar", 0, 0, true, "", 2, argv_foo_backslashbar);
test("foo \"\\\\bar\"", 0, 0, true, "", 2, argv_foo_backslashbar);
test("foo \\\"bar", 0, 0, true, "", 2, argv_foo_quotmarkbar);
test("foo \"\\\"bar\"", 0, 0, true, "", 2, argv_foo_quotmarkbar);
test("foo bar\\ ", 0, 0, true, "", 2, argv_foo_barspace);
test("foo \"bar\\ \"", 0, 0, true, "", 2, argv_foo_barspace);
test("foo bar\\\\", 0, 0, true, "", 2, argv_foo_barbackslash);
test("foo \"bar\\\\\"", 0, 0, true, "", 2, argv_foo_barbackslash);
test("foo bar\\\"", 0, 0, true, "", 2, argv_foo_barquotmark);
test("foo \"bar\\\"\"", 0, 0, true, "", 2, argv_foo_barquotmark);
test("foo \\ bar\\ ", 0, 0, true, "", 2, argv_foo_spacebarspace);
test("foo \"\\ bar\\ \"", 0, 0, true, "", 2, argv_foo_spacebarspace);
test("foo \\\\bar\\\\", 0, 0, true, "", 2, argv_foo_backslashbarbackslash);
test("foo \"\\\\bar\\\\\"", 0, 0, true, "", 2, argv_foo_backslashbarbackslash);
test("foo \\\"bar\\\"", 0, 0, true, "", 2, argv_foo_quotmarkbarquotmark);
test("foo \"\\\"bar\\\"\"", 0, 0, true, "", 2, argv_foo_quotmarkbarquotmark);
test("foo\\ bar car", 0, 0, true, "", 2, argv_foospacebar_car);
test("\"foo bar\" car", 0, 0, true, "", 2, argv_foospacebar_car);
@ -187,6 +220,13 @@ int main()
test("\\\"\\", 0, 0, false, "EOL after backslash", 0, argv0);
test("foo\\", 0, 0, false, "EOL after backslash", 0, argv0);
test("\"\\", 0, 0, false, "EOL after backslash inside quote", 0, argv0);
test("\" \\", 0, 0, false, "EOL after backslash inside quote", 0, argv0);
test("\"\\ \\", 0, 0, false, "EOL after backslash inside quote", 0, argv0);
test("\"\\\\\\", 0, 0, false, "EOL after backslash inside quote", 0, argv0);
test("\"\\\"\\", 0, 0, false, "EOL after backslash inside quote", 0, argv0);
test("\"foo\\", 0, 0, false, "EOL after backslash inside quote", 0, argv0);
test("foo\"", 0, 0, false, "unescaped quotation mark", 0, argv0);
test("foo\"bar", 0, 0, false, "unescaped quotation mark", 0, argv0);