wiptty

4 files changed, 157 insertions, 0 deletions

diff --git a/src/kprintf/CMakeLists.txt b/src/kprintf/CMakeLists.txt
new file mode 100644
index 0000000..b847938
--- /dev/null
+++ b/src/kprintf/CMakeLists.txt
@@ -0,0 +1,20 @@
+# wanix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(kprintf ${src})
+add_subdirectory(src)
+target_include_directories(kprintf PUBLIC include PRIVATE private_include)
+target_link_libraries(kprintf PUBLIC c PRIVATE aio)
diff --git a/src/kprintf/include/kprintf.h b/src/kprintf/include/kprintf.h
new file mode 100644
index 0000000..606adc1
--- /dev/null
+++ b/src/kprintf/include/kprintf.h
@@ -0,0 +1,24 @@
+/*
+ * wanix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef KPRINTF_H
+#define KPRINTF_H
+
+int kprintf(const char *fmt, ...);
+
+#endif
diff --git a/src/kprintf/src/CMakeLists.txt b/src/kprintf/src/CMakeLists.txt
new file mode 100644
index 0000000..abd972e
--- /dev/null
+++ b/src/kprintf/src/CMakeLists.txt
@@ -0,0 +1,17 @@
+# wanix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(kprintf PRIVATE kprintf.c)
diff --git a/src/kprintf/src/kprintf.c b/src/kprintf/src/kprintf.c
new file mode 100644
index 0000000..d5504fe
--- /dev/null
+++ b/src/kprintf/src/kprintf.c
@@ -0,0 +1,96 @@
+/*
+ * wanix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <kprintf.h>
+#include <aio.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+static void writechar(const char c, void *const args)
+{
+    static char buf[128];
+    static size_t bufi;
+    struct fs_fd *fd = args;
+    struct aio *aio = NULL;
+
+    buf[bufi++] = c;
+
+    if (c == '\n' || bufi >= sizeof buf - 1)
+    {
+        const struct fs_write w =
+        {
+            .buf = buf,
+            .fd = fd,
+            .n = bufi
+        };
+
+        if (!(aio = aio_write(&w, NULL)))
+            goto end;
+
+        struct aio_poll p = (const struct aio_poll){.aio = aio};
+
+        aio_poll(&p, -1);
+        bufi = 0;
+    }
+
+end:
+    aio_free(aio);
+}
+
+int kprintf(const char *const fmt, ...)
+{
+    va_list ap;
+    struct fs_fd fd;
+    struct timespec ts;
+    const struct fs_open o =
+    {
+        .fd = &fd,
+        .path = "/dev/tty",
+        .mode = O_WRONLY
+    };
+
+    struct aio *aio_op = NULL;
+
+    va_start(ap, fmt);
+
+    if (clock_gettime(CLOCK_REALTIME, &ts))
+        goto failure;
+
+    if (!(aio_op = aio_open(&o, NULL)))
+        goto failure;
+
+    struct aio_poll p = {.aio = aio_op};
+
+    if (aio_poll(&p, -1) < 0
+        || p.error
+        || fctprintf(writechar, &fd, "[%lld.%03ld] ", ts.tv_sec,
+            ts.tv_nsec / 1000000) < 0
+        || fctvprintf(writechar, &fd, fmt, ap) < 0)
+        goto failure;
+
+    va_end(ap);
+    return 0;
+
+failure:
+    aio_free(aio_op);
+    va_end(ap);
+    return -1;
+}