sysfs, errno, improve foolshell, etc

1 files changed, 88 insertions, 13 deletions

diff --git a/fs/fd.c b/fs/fd.c
index ed8a3b1..43ffb0d 100644
--- a/fs/fd.c
+++ b/fs/fd.c
@@ -4,6 +4,9 @@
 #include "kmalloc.h"
 #include "ext2.h"
 #include "log.h"
+#include "lib/string/string.h"
+#include "lib/printf/printf.h"
+#include "ringbuffer.h"
 
 bool fd_write(fd* f,uint8_t c)
 {
@@ -20,21 +23,14 @@ bool fd_has(fd* f)
     return f->has(f->data);
 }
 
-bool fd_close(fd* f)
+bool fd_eof(fd* f)
 {
-    return f->close(f->data);
+    return f->eof(f->data);
 }
 
-fd fd_from_fifo(fifo* fif)
+bool fd_close(fd* f)
 {
-    fd f;
-    f.type=FD_TYPE_FIFO_BUFFERED;
-    f.data=fif;
-    f.read=fifo_get;
-    f.write=fifo_put;
-//    f.close=fd_close;
-    f.has=fifo_has;
-    return f;
+    return f->close(f->data);
 }
 
 //----
@@ -62,17 +58,75 @@ uint8_t ext2_read(uint32_t* data)
 
 bool ext2_has(uint32_t* data)
 {
+    return 1;
+}
+
+bool ext2_eof(uint32_t* data)
+{
     uint32_t save=data[1];
     uint32_t c=ext2_read_inode(VMEM_EXT2_RAMIMAGE,data[0],&c,&data[1],1);
     data[1]=save;
-    return (c>0);
-
+    return (c==0);
 }
+
 void ext2_close(void* x)
 {
     kbfree(x);
 }
 
+uint8_t sysfs_get(uint32_t *data)
+{
+    return ringbuffer_get(data);
+}
+
+bool sysfs_has(uint32_t *data)
+{
+    return true;
+}
+
+bool sysfs_eof(uint32_t *data)
+{
+    return !ringbuffer_has(data);
+}
+
+void sysfs_close(uint32_t *data)
+{
+    ringbuffer *r=data;
+    ringbuffer_free(data); // free ringbuffer buffer
+    kbfree(data); // free memory holding ringbuffer information
+}
+
+void get_sysfs_data(ringbuffer *r,char *format_string, ...)
+{
+    char buf[256];
+    va_list va;
+    va_start(va,format_string);
+    tfp_vsprintf(buf,format_string,va);
+    va_end(va);
+
+    for(int i=0;i<strlen(buf);i++)
+	ringbuffer_put(r,buf[i]);
+
+    ringbuffer_put(r,'\n');
+}
+
+bool fifo_eof(uint32_t* data)
+{
+    return false;
+}
+fd fd_from_fifo(fifo* fif)
+{
+    fd f;
+    f.type=FD_TYPE_FIFO_BUFFERED;
+    f.data=fif;
+    f.read=fifo_get;
+    f.write=fifo_put;
+    f.eof=fifo_eof;
+//    f.close=fd_close;  //TODO.. etc also otehr and cleanups
+    f.has=fifo_has;
+    return f;
+}
+
 fd fd_from_path(char* path)
 {
     fd f;
@@ -81,6 +135,27 @@ fd fd_from_path(char* path)
     f.read=ext2_read;
     f.write=ext2_write;
     f.close=ext2_close;
+    f.eof=ext2_eof;
     f.has=ext2_has;
     return f;
 }
+
+fd fd_from_sysfs(void(*g)(ringbuffer *r,void (*f)(ringbuffer *r,char *fmt, ...)))
+{
+    fd f;
+    f.type=FD_TYPE_SYSFS;
+    f.data=kballoc(1);
+    ringbuffer r=ringbuffer_init(1);
+
+    g(&r,get_sysfs_data);
+    memcpy(f.data,&r,sizeof(ringbuffer));
+
+    f.read=sysfs_get;
+    f.write=0;
+    f.close=sysfs_close;
+    f.has=sysfs_has;
+    f.eof=sysfs_eof;
+    
+    return f;
+}
+