try to finish find

Makefile

@@ -86,7 +86,7 @@ LD = $(TOOLPREFIX)ld
 OBJCOPY = $(TOOLPREFIX)objcopy
 OBJDUMP = $(TOOLPREFIX)objdump
 
-CFLAGS = -Wall -Werror -O2 -fno-omit-frame-pointer -ggdb -gdwarf-2
+CFLAGS = -Wall -Werror -Ofast -fno-omit-frame-pointer -ggdb -gdwarf-2
 
 ifdef LAB
 LABUPPER = $(shell echo $(LAB) | tr a-z A-Z)
@@ -191,6 +191,7 @@ UPROGS=\
 	$U/_sleep\
 	$U/_pingpong\
 	$U/_primes\
+	$U/_find\
 
 
 
@@ -227,10 +228,10 @@ $U/_uthread: $U/uthread.o $U/uthread_switch.o $(ULIB)
 	$(OBJDUMP) -S $U/_uthread > $U/uthread.asm
 
 ph: notxv6/ph.c
-	gcc -o ph -g -O2 $(XCFLAGS) notxv6/ph.c -pthread
+	gcc -o ph -g -Ofast $(XCFLAGS) notxv6/ph.c -pthread
 
 barrier: notxv6/barrier.c
-	gcc -o barrier -g -O2 $(XCFLAGS) notxv6/barrier.c -pthread
+	gcc -o barrier -g -Ofast $(XCFLAGS) notxv6/barrier.c -pthread
 endif
 
 ifeq ($(LAB),pgtbl)

kernel/fs.h

@@ -1,6 +1,6 @@
 // On-disk file system format.
 // Both the kernel and user programs use this header file.
-
+#include "kernel/types.h"
 
 #define ROOTINO 1  // root i-number
 #define BSIZE 1024 // block size
@@ -35,7 +35,7 @@ struct dinode {
   short minor;             // Minor device number (T_DEVICE only)
   short nlink;             // Number of links to inode in file system
   uint size;               // Size of file (bytes)
-  uint addrs[NDIRECT+1];   // Data block addresses
+  uint addrs[NDIRECT + 1]; // Data block addresses
 };
 
 // Inodes per block.
@@ -45,10 +45,10 @@ struct dinode {
 #define IBLOCK(i, sb) ((i) / IPB + sb.inodestart)
 
 // Bitmap bits per block
-#define BPB           (BSIZE*8)
+#define BPB (BSIZE * 8)
 
 // Block of free map containing bit for block b
-#define BBLOCK(b, sb) ((b)/BPB + sb.bmapstart)
+#define BBLOCK(b, sb) ((b) / BPB + sb.bmapstart)
 
 // Directory is a file containing a sequence of dirent structures.
 #define DIRSIZ 14
@@ -57,4 +57,3 @@ struct dirent {
   ushort inum;
   char name[DIRSIZ];
 };
-

user/find.c

@@ -0,0 +1,12 @@
+#include "kernel/fcntl.h"
+#include "kernel/fs.h"
+#include "kernel/stat.h"
+#include "kernel/types.h"
+#include "user/user.h"
+
+int main(int argc, char *argv[]) {
+  if (argc < 3) {
+    printf("Usage: find path pattern\n");
+  }
+  exit(0);
+}

user/ls.c

@@ -1,67 +1,63 @@
-#include "kernel/types.h"
-#include "kernel/stat.h"
-#include "user/user.h"
-#include "kernel/fs.h"
 #include "kernel/fcntl.h"
+#include "kernel/fs.h"
+#include "kernel/stat.h"
+#include "kernel/types.h"
+#include "user/user.h"
 
-char*
-fmtname(char *path)
-{
-  static char buf[DIRSIZ+1];
+char *fmtname(char *path) {
+  static char buf[DIRSIZ + 1];
   char *p;
 
   // Find first character after last slash.
-  for(p=path+strlen(path); p >= path && *p != '/'; p--)
+  for (p = path + strlen(path); p >= path && *p != '/'; p--)
     ;
   p++;
 
   // Return blank-padded name.
-  if(strlen(p) >= DIRSIZ)
+  if (strlen(p) >= DIRSIZ)
     return p;
   memmove(buf, p, strlen(p));
-  memset(buf+strlen(p), ' ', DIRSIZ-strlen(p));
+  memset(buf + strlen(p), ' ', DIRSIZ - strlen(p));
   return buf;
 }
 
-void
-ls(char *path)
-{
+void ls(char *path) {
   char buf[512], *p;
   int fd;
   struct dirent de;
   struct stat st;
 
-  if((fd = open(path, O_RDONLY)) < 0){
+  if ((fd = open(path, O_RDONLY)) < 0) {
     fprintf(2, "ls: cannot open %s\n", path);
     return;
   }
 
-  if(fstat(fd, &st) < 0){
+  if (fstat(fd, &st) < 0) {
     fprintf(2, "ls: cannot stat %s\n", path);
     close(fd);
     return;
   }
 
-  switch(st.type){
+  switch (st.type) {
   case T_DEVICE:
   case T_FILE:
     printf("%s %d %d %l\n", fmtname(path), st.type, st.ino, st.size);
     break;
 
   case T_DIR:
-    if(strlen(path) + 1 + DIRSIZ + 1 > sizeof buf){
+    if (strlen(path) + 1 + DIRSIZ + 1 > sizeof buf) {
       printf("ls: path too long\n");
       break;
     }
     strcpy(buf, path);
-    p = buf+strlen(buf);
+    p = buf + strlen(buf);
     *p++ = '/';
-    while(read(fd, &de, sizeof(de)) == sizeof(de)){
-      if(de.inum == 0)
+    while (read(fd, &de, sizeof(de)) == sizeof(de)) {
+      if (de.inum == 0)
         continue;
       memmove(p, de.name, DIRSIZ);
       p[DIRSIZ] = 0;
-      if(stat(buf, &st) < 0){
+      if (stat(buf, &st) < 0) {
         printf("ls: cannot stat %s\n", buf);
         continue;
       }
@@ -72,16 +68,14 @@ ls(char *path)
   close(fd);
 }
 
-int
-main(int argc, char *argv[])
-{
+int main(int argc, char *argv[]) {
   int i;
 
-  if(argc < 2){
+  if (argc < 2) {
     ls(".");
     exit(0);
   }
-  for(i=1; i<argc; i++)
+  for (i = 1; i < argc; i++)
     ls(argv[i]);
   exit(0);
 }