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[6s] Add simple command handling

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Super simple little strncmp-based command lookup, adding 'help' and
'version' commands to 6s.
This commit is contained in:
Justin C. Miller
2024-04-28 19:36:27 -07:00
parent 0ab2f59fe8
commit 70af5a31cd
1 changed files with 35 additions and 8 deletions
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43
src/user/6s/main.cpp
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@@ -1,3 +1,5 @@
#include <string.h>
#include <j6/channel.hh>
#include <j6/init.h>
#include <j6/errors.h>
@@ -18,6 +20,17 @@ j6_handle_t g_handle_sys = j6_handle_invalid;
const char prompt[] = "\x1b[1;32mj6> \x1b[0m";
static constexpr size_t prompt_len = sizeof(prompt) - 1;
const char greeting[] = "\x1b[2J\x1b[H\x1b[1;30m\
\r\n Welcome to the \x1b[34mjsix\x1b[30m Operating System!\
\r\n \
\r\n This is the \x1b[34m6s\x1b[30m command shell, type `\x1b[4;33mhelp\x1b[0;1;30m`\
\r\n for a list of commands.\
\r\n\r\n\x1b[0m";
static constexpr size_t greeting_len = sizeof(greeting) - 1;
void handle_command(edit::source &s, const char *command, size_t len);
class channel_source :
public edit::source
{
@@ -52,13 +65,6 @@ main(int argc, const char **argv)
if (g_handle_sys == j6_handle_invalid)
return 1;
/*
static constexpr size_t buffer_pages = 1;
j6::ring_buffer in_buffer {buffer_pages};
if (!in_buffer.valid())
return 2;
*/
j6_handle_t slp = j6_find_init_handle(j6::proto::sl::id);
if (slp == j6_handle_invalid)
return 3;
@@ -90,8 +96,29 @@ main(int argc, const char **argv)
static constexpr size_t bufsize = 256;
char buffer [bufsize];
source.write(greeting, greeting_len);
while (true) {
size_t len = editor.read(buffer, bufsize, prompt, prompt_len);
j6::syslog(j6::logs::app, j6::log_level::info, "Command: %s", buffer);
handle_command(source, buffer, len);
}
}
void
handle_command(edit::source &s, const char *command, size_t len)
{
j6::syslog(j6::logs::app, j6::log_level::info, "Command: %s", command);
if (len == 0)
return;
if (strncmp(command, "help", len) == 0) {
s.write("help", 4);
s.write("\r\n", 2);
s.write("version", 7);
s.write("\r\n", 2);
} else if (!strncmp(command, "version", len)) {
static const char *version = GIT_VERSION;
s.write(version, strlen(version));
s.write("\r\n", 2);
}
}