fs Fetch file contents

user/fs/.gitignore

@@ -0,0 +1,2 @@
+*.o
+fs

user/fs/Makefile

@@ -0,0 +1,24 @@
+include $(ROOT)/mk/grabsrc.mk
+include ../Makefile.inc
+
+.PHONY: all clean
+
+TARGET := fs
+
+LDFLAGS += -L$(ROOT)/ulib -l:libulib.a
+
+SRCFILES := $(call GRABSRC, .)
+CFILES := $(call GET_CFILES, $(SRCFILES))
+OBJ := $(call GET_OBJ, $(SRCFILES))
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+all: $(TARGET)
+
+$(TARGET): $(OBJ)
+	$(LD) $^ $(LDFLAGS) -o $@
+	echo $$(realpath $(TARGET)) >> $(FILES)
+
+clean:
+	rm -f $(OBJ) $(TARGET)

user/fs/fetch.c

@@ -0,0 +1,35 @@
+#include <stddef.h>
+#include <stdint.h>
+#include <ulib.h>
+
+void fs_fetch(void) {
+  if (argslen() < 2) {
+    uprintf("fs: Not enough arguments\n");
+    return;
+  }
+
+  char *path = *(args()+1);
+
+  IOH ioh = ioctl(IOCTL_NOHANDLE, IOCTL_OPENF, (uint64_t)path, IOCTL_F_READ, 0);
+  if (ioh < 0) {
+    uprintf("fs: could not open %s\n", path);
+    return;
+  }
+
+  IoctlStat statbuf; ZERO(&statbuf);
+
+  ioctl(ioh, IOCTL_STAT, (uint64_t)&statbuf, 0, 0);
+  if (statbuf.type == IOCTLSTAT_FILE) {
+    uint8_t *buf = umalloc(statbuf.size+1);
+    string_memset(buf, 0, statbuf.size+1);
+
+    if (ioctl(ioh, IOCTL_READ, (uint64_t)buf, statbuf.size, 0) < 0) {
+      uprintf("fs: coult not read %s\n", path);
+      ufree(buf);
+      ioctl(ioh, IOCTL_CLOSEF, 0, 0, 0);
+      return;
+    }
+
+    uprintf("%s", buf);
+  }
+}

user/fs/main.c

@@ -0,0 +1,19 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <ulib.h>
+
+extern void fs_fetch(void);
+
+void main(void) {
+  if (argslen() == 0) {
+    return;
+  }
+
+  char *cmd = args()[0];
+
+  if (string_strcmp(cmd, "fetch") == 0) {
+    fs_fetch();
+  } else {
+    uprintf("fs: unknown command %s\n", cmd);
+  }
+}