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#include <sys/types.h> #include <sys/stat.h> #include <dirent.h> #include <limits.h> #include <errno.h> #include "ourhdr.h" /* function type that's called for each filename */ typedef int Myfunc(const char *, const struct stat *, int); static Myfunc myfunc; static int myftw(char *, Myfunc *); static int dopath(Myfunc *); static long nreg, ndir, nblk, nchr, nfifo, nslink, nsock, ntot; int main(int argc, char *argv[]) { int ret; if (argc != 2) err_quit("usage: ftw <starting-pathname>"); ret = myftw(argv[1], myfunc); /* does it all */ if ( (ntot = nreg + ndir + nblk + nchr + nfifo + nslink + nsock) == 0) ntot = 1; /* avoid divide by 0; print 0 for all counts */ printf("regular files = %7ld, %5.2f %%\n", nreg, nreg*100.0/ntot); printf("directories = %7ld, %5.2f %%\n", ndir, ndir*100.0/ntot); printf("block special = %7ld, %5.2f %%\n", nblk, nblk*100.0/ntot); printf("char special = %7ld, %5.2f %%\n", nchr, nchr*100.0/ntot); printf("FIFOs = %7ld, %5.2f %%\n", nfifo, nfifo*100.0/ntot); printf("symbolic links = %7ld, %5.2f %%\n", nslink,nslink*100.0/ntot); printf("sockets = %7ld, %5.2f %%\n", nsock, nsock*100.0/ntot); exit(ret); } /* * Descend through the hierarchy, starting at "pathname". * The caller's func() is called for every file. */ #define FTW_F 1 /* file other than directory */ #define FTW_D 2 /* directory */ #define FTW_DNR 3 /* directory that can't be read */ #define FTW_NS 4 /* file that we can't stat */ static char *fullpath; /* contains full pathname for every file */ static int myftw(char *pathname, Myfunc *func) { fullpath = path_alloc(NULL); /* malloc's for PATH_MAX+1 bytes */ strcpy(fullpath, pathname); /* initialize fullpath */ return dopath(func); } /* * Descend through the hierarchy, starting at "fullpath". * If "fullpath" is anything other than a directory, we lstat() it, * call func(), and return. For a directory, we call ourself * recursively for each name in the directory. */ static int dopath(Myfunc* func) { struct stat statbuf; struct dirent *dirp; DIR *dp; int ret; char *ptr; if (lstat(fullpath, &statbuf) < 0) return func(fullpath, &statbuf, FTW_NS); /* stat error */ if (S_ISDIR(statbuf.st_mode) == 0) return func(fullpath, &statbuf, FTW_F); /* not a directory */ /* * It's a directory. First call func() for the directory, * then process each filename in the directory. */ if ( (ret = func(fullpath, &statbuf, FTW_D)) != 0) return ret; ptr = fullpath + strlen(fullpath); /* point to end of fullpath */ *ptr++ = '/'; *ptr = 0; if ( (dp = opendir(fullpath)) == NULL) return func(fullpath, &statbuf, FTW_DNR); while ( (dirp = readdir(dp)) != NULL) { if (strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0) continue; /* ignore dot and dot-dot */ // change directory to the directory containing the file chdir(fullpath); strcpy(ptr, dirp->d_name); /* append name after slash */ if ( (ret = dopath(func)) != 0) /* recursive */ break; /* time to leave */ } // change directory back to parent directory chdir(".."); ptr[-1] = 0; /* erase everything from slash onwards */ if (closedir(dp) < 0) err_ret("can't close directory %s", fullpath); return(ret); } static int myfunc(const char *pathname, const struct stat *statptr, int type) { switch (type) { case FTW_F: // change directory to the directory containing the file char* slash_ptr = strrchr(pathname, '/'); if (slash_ptr != NULL) { *slash_ptr = '\0'; chdir(pathname); } // process file ret = func(pathname, statptr, type); // change directory back to original if (slash_ptr != NULL) { *slash_ptr = '/'; chdir(".."); } return ret; break; case FTW_D: ndir++; break; case FTW_DNR: err_ret("can't read directory %s", pathname); break; case FTW_NS: err_ret("stat error for %s", pathname); break; default: err_dump("unknown type %d for pathname %s", type, pathname); } return 0; }
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