a1c965da1e
Sixty-five headers sat side by side in include/, so `#include "irq.h"` said nothing about where irq.h was or what it belonged to, and errno.h, stat.h and fcntl.h at the top shadowed the system's for any host tool built with -I./include. They are in folders now -- arch/ core/ fs/ dev/ gfx/ net/ uapi/ (and ldls/ for the Linux driver layer) -- and every include names the folder, as Linux's do: "core/proc.h". Done mechanically and checked the hard way: the kernel built from this tree disassembles identically to the one built from the tree before it. The full image boots, and userland is the same set of programs. Paths in docs and comments follow; docs/guides/layout.md has a table of what is where, and tools/fix-includes.py rewrites old-style includes from the folders in the tree, for code written before this. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
// inputtest -- read raw events from /dev/input/eventN.
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//
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// The point of the raw devices is everything the console cannot say: which
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// key was released, whether one is still held, and where the mouse went. None
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// of that shows up in a character stream, so none of it can be tested by
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// typing into a shell.
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//
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// inputtest read the keyboard until Esc is released
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// inputtest mouse read the mouse until interrupted
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// inputtest -n N stop after N events (used by the boot check)
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//
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// Prints one line per event: type, code and value, decoded where there is a
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// name for it.
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#include "core/types.h"
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#include "uapi/user.h"
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#include "uapi/fcntl.h"
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#include "dev/input.h"
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static void
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puts_(const char *s)
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{
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int n = 0;
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while (s[n]) n++;
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write(1, (void*)s, n);
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}
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static void
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putn_(int v)
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{
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char buf[12];
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int i = 0, neg = 0;
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if (v < 0) { neg = 1; v = -v; }
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if (v == 0) buf[i++] = '0';
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while (v) { buf[i++] = '0' + (v % 10); v /= 10; }
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if (neg) buf[i++] = '-';
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while (i--) write(1, &buf[i], 1);
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}
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static const char *
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typename_(int t)
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{
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switch (t) {
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case EV_SYN: return "SYN";
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case EV_KEY: return "KEY";
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case EV_REL: return "REL";
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default: return "?";
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}
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}
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static int
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streq(const char *a, const char *b)
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{
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while (*a && *a == *b) { a++; b++; }
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return *a == *b;
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}
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int
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main(int argc, char **argv)
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{
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const char *path = "/dev/input/event0";
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int limit = 0, count = 0, i;
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int fd;
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struct input_event ev;
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for (i = 1; i < argc; i++) {
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if (streq(argv[i], "mouse"))
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path = "/dev/input/event1";
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else if (streq(argv[i], "-n") && i + 1 < argc) {
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const char *p = argv[++i];
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limit = 0;
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while (*p >= '0' && *p <= '9') limit = limit * 10 + (*p++ - '0');
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}
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}
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fd = open((char*)path, O_RDONLY);
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if (fd < 0) {
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puts_("inputtest: cannot open ");
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puts_(path);
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puts_("\n");
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exit();
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}
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puts_("inputtest: reading ");
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puts_(path);
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puts_("\n");
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for (;;) {
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int n = read(fd, &ev, sizeof(ev));
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// A short read would mean the device handed back part of a struct,
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// which would desynchronise every event after it. Saying so is more
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// use than silently carrying on with garbage.
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if (n == 0) { puts_("inputtest: end of stream\n"); break; }
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if (n < 0) { puts_("inputtest: read error\n"); break; }
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if (n != sizeof(ev)) {
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puts_("inputtest: SHORT READ -- events are not whole\n");
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break;
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}
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puts_(" ");
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puts_(typename_(ev.type));
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puts_(" code ");
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putn_(ev.code);
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puts_(" value ");
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putn_(ev.value);
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if (ev.type == EV_KEY)
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puts_(ev.value ? " (press)" : " (release)");
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puts_("\n");
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// Esc released ends the keyboard run, so a person can stop it without
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// a signal. The boot check uses -n instead.
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if (ev.type == EV_KEY && ev.code == KEY_ESC && ev.value == 0)
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break;
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if (limit && ++count >= limit) {
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puts_("inputtest: event limit reached\n");
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break;
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}
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}
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close(fd);
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puts_("inputtest: done\n");
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exit();
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}
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