try to finish find

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);
 }