tailix/libkernaux
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Implement quotes in cmd line parser

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This commit is contained in:
Alex Kotov 2021-12-12 20:39:17 +05:00
parent 02ce7005e6
commit 09f05356e0
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
3 changed files with 93 additions and 7 deletions
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7
examples/cmdline.c
View file

@ -6,7 +6,7 @@
static const unsigned int ARGV_COUNT_MAX = 100;
static const unsigned int ARG_SIZE_MAX = 4096;
static const char *const cmdline = "foo bar\\ car";
static const char *const cmdline = "foo bar\\ baz \"car cdr\"";
int main()
{
@ -26,9 +26,10 @@ int main()
));
assert(strcmp(error_msg, "") == 0);
assert(argc == 2);
assert(argc == 3);
assert(strcmp(argv[0], "foo") == 0);
assert(strcmp(argv[1], "bar car") == 0);
assert(strcmp(argv[1], "bar baz") == 0);
assert(strcmp(argv[2], "car cdr") == 0);
return 0;
}

49
src/cmdline.c
View file

@ -13,6 +13,7 @@ enum State {
WHITESPACE,
TOKEN,
BACKSLASHED,
QUOTED,
};
bool kernaux_cmdline_parse(
@ -75,6 +76,15 @@ bool kernaux_cmdline_parse(
state = BACKSLASHED;
argv[(*argc)++] = buffer;
}
else if (cur == '"') {
if (*argc >= argv_count_max) {
kernaux_strncpy(error_msg, "too many args", 13);
goto fail;
}
state = QUOTED;
argv[(*argc)++] = buffer;
}
else {
if (*argc >= argv_count_max) {
kernaux_strncpy(error_msg, "too many args", 13);
@ -108,6 +118,15 @@ bool kernaux_cmdline_parse(
state = BACKSLASHED;
argv[(*argc)++] = buffer;
}
else if (cur == '"') {
if (*argc >= argv_count_max) {
kernaux_strncpy(error_msg, "too many args", 13);
goto fail;
}
state = QUOTED;
argv[(*argc)++] = buffer;
}
else {
if (*argc >= argv_count_max) {
kernaux_strncpy(error_msg, "too many args", 13);
@ -150,6 +169,10 @@ bool kernaux_cmdline_parse(
else if (cur == '\\') {
state = BACKSLASHED;
}
else if (cur == '"') {
kernaux_strncpy(error_msg, "unescaped quotation mark", 24);
goto fail;
}
else {
if (buffer_size >= arg_size_max) {
kernaux_strncpy(error_msg, "arg too long", 12);
@ -177,6 +200,32 @@ bool kernaux_cmdline_parse(
++buffer_size;
}
break;
case QUOTED:
if (cur == '\0') {
kernaux_strncpy(error_msg, "EOL inside quote", 16);
goto fail;
}
else if (cur == '"') {
if (buffer_size >= arg_size_max) {
kernaux_strncpy(error_msg, "arg too long", 12);
goto fail;
}
state = WHITESPACE;
*(buffer++) = '\0';
buffer_size = 0;
}
else {
if (buffer_size >= arg_size_max) {
kernaux_strncpy(error_msg, "arg too long", 12);
goto fail;
}
*(buffer++) = cur;
++buffer_size;
}
break;
}
if (state == FINAL) {

44
tests/test_cmdline.c
View file

@ -25,10 +25,21 @@ static void test(
static const char *const argv0[] = {};
static const char *const argv_empty[] = {""};
static const char *const argv_empty_X2[] = {"", ""};
static const char *const argv_empty_X3[] = {"", "", ""};
static const char *const argv_foo[] = {"foo"};
static const char *const argv_foo_bar[] = {"foo", "bar"};
static const char *const argv_foo_bar_car[] = {"foo", "bar", "car"};
static const char *const argv_spaceX3_X3[] = {" ", " ", " "};
static const char *const argv_backslashX3_X3[] = {"\\\\\\", "\\\\\\", "\\\\\\"};
static const char *const argv_quotmarkX3_X3[] = {"\"\"\"", "\"\"\"", "\"\"\""};
static const char *const argv_foospacebar_car[] = {"foo bar", "car"};
static const char *const argv_foo_barspacecar[] = {"foo", "bar car"};
static const char *const argv_space[] = {" "};
static const char *const argv_backslash[] = {"\\"};
static const char *const argv_quotmark[] = {"\""};
@ -63,10 +74,6 @@ static const char *const argv_foo_spacebarspace[] = {"foo", " bar "};
static const char *const argv_foo_backslashbarbackslash[] = {"foo", "\\bar\\"};
static const char *const argv_foo_quotmarkbarquotmark[] = {"foo", "\"bar\""};
static const char *const argv_spaceX3_X3[] = {" ", " ", " "};
static const char *const argv_backslashX3_X3[] = {"\\\\\\", "\\\\\\", "\\\\\\"};
static const char *const argv_quotmarkX3_X3[] = {"\"\"\"", "\"\"\"", "\"\"\""};
int main()
{
test("", 0, 0, true, "", 0, argv0);
@ -82,6 +89,20 @@ int main()
test(" foo bar ", 0, 0, true, "", 2, argv_foo_bar);
test("foo bar car", 0, 0, true, "", 3, argv_foo_bar_car);
test("\"\"", 0, 0, true, "", 1, argv_empty);
test("\"\" \"\"", 0, 0, true, "", 2, argv_empty_X2);
test("\"\" \"\" \"\"", 0, 0, true, "", 3, argv_empty_X3);
test("\"foo\"", 0, 0, true, "", 1, argv_foo);
test("\"foo\" \"bar\"", 0, 0, true, "", 2, argv_foo_bar);
test(" \"foo\" \"bar\"", 0, 0, true, "", 2, argv_foo_bar);
test("\"foo\" \"bar\" ", 0, 0, true, "", 2, argv_foo_bar);
test(" \"foo\" \"bar\" ", 0, 0, true, "", 2, argv_foo_bar);
test("\"foo\" \"bar\"", 0, 0, true, "", 2, argv_foo_bar);
test("\"foo\" \"bar\" ", 0, 0, true, "", 2, argv_foo_bar);
test(" \"foo\" \"bar\"", 0, 0, true, "", 2, argv_foo_bar);
test(" \"foo\" \"bar\" ", 0, 0, true, "", 2, argv_foo_bar);
test("\"foo\" \"bar\" \"car\"", 0, 0, true, "", 3, argv_foo_bar_car);
test("foo bar car", 3, 0, true, "", 3, argv_foo_bar_car);
test("foo bar car", 0, 4, true, "", 3, argv_foo_bar_car);
test("foo bar car", 3, 4, true, "", 3, argv_foo_bar_car);
@ -90,6 +111,14 @@ 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("\"foo\" \"bar\" \"car\"", 3, 0, true, "", 3, argv_foo_bar_car);
test("\"foo\" \"bar\" \"car\"", 0, 4, true, "", 3, argv_foo_bar_car);
test("\"foo\" \"bar\" \"car\"", 3, 4, true, "", 3, argv_foo_bar_car);
test("\"foo\" \"bar\" \"car\"", 2, 0, false, "too many args", 0, argv0);
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);
@ -124,6 +153,13 @@ int main()
test("foo \\\\bar\\\\", 0, 0, true, "", 2, argv_foo_backslashbarbackslash);
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);
test("\"foo bar\" \"car\"", 0, 0, true, "", 2, argv_foospacebar_car);
test("foo bar\\ car", 0, 0, true, "", 2, argv_foo_barspacecar);
test("foo \"bar car\"", 0, 0, true, "", 2, argv_foo_barspacecar);
test("\"foo\" \"bar car\"", 0, 0, true, "", 2, argv_foo_barspacecar);
test("\\ \\ \\ \\ \\ \\ \\ \\ \\ ", 3, 0, true, "", 3, argv_spaceX3_X3);
test("\\\\\\\\\\\\ \\\\\\\\\\\\ \\\\\\\\\\\\", 3, 0, true, "", 3, argv_backslashX3_X3);
test("\\\"\\\"\\\" \\\"\\\"\\\" \\\"\\\"\\\"", 3, 0, true, "", 3, argv_quotmarkX3_X3);