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#include <linux/stat.h>
#include <unistd.h>
#include <limits.h>
#include <ftw.h>
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
int ftw(const char *dir,int (*fn)(const char *file, const struct stat *sb, int flag), int depth) {
char *cwd;
int cwdlen;
DIR *d;
struct dirent *de;
struct stat sb;
if (chdir(dir)) return -1;
cwd=alloca(PATH_MAX+1);
if (!getcwd(cwd,PATH_MAX)) return -1;
cwd[PATH_MAX]=0;
cwdlen=strlen(cwd);
/* write(1,"ftw in ",7); puts(cwd); */
if (!(d=opendir("."))) return -1;
while ((de=readdir(d))) {
int res;
int flag;
int nlen;
char *filename;
if (de->d_name[0]=='.' &&
(de->d_name[1]==0 ||
(de->d_name[1]=='.' && de->d_name[2]==0))) continue;
nlen=strlen(de->d_name);
filename=alloca(nlen+cwdlen+3);
memmove(filename,cwd,cwdlen);
filename[cwdlen]='/';
memmove(filename+cwdlen+1,de->d_name,nlen+1);
if (!lstat(de->d_name,&sb)) {
if (S_ISLNK(sb.st_mode)) flag=FTW_SL; else
if (S_ISDIR(sb.st_mode)) flag=FTW_D; else
flag=FTW_F;
} else
flag=FTW_NS;
res=fn(filename,&sb,flag);
if (res) return res;
if (flag==FTW_D && depth>0) {
res=ftw(filename,fn,depth-1);
chdir(dir);
if (res) return res;
}
/* puts(de->d_name); */
}
closedir(d);
return 0;
}
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