#include <limits.h>

 #include <string.h>

 #include <sys/stat.h>

 #include <stdlib.h>

 #include <stdio.h>

 #include <unistd.h>

 int

 razor_create_dir(const char *root, const char *path)

 {

 	char buffer[PATH_MAX], *p;

 	const char *slash, *next;

 	struct stat buf;

 	/* Create all sub-directories in dir and then create name. We

 	 * know root exists and is a dir, root does not end in a '/',

 	 * and path has a leading '/'. */

 	strcpy(buffer, root);

 	p = buffer + strlen(buffer);

 	slash = path;

 	for (slash = path; slash[1] != '\0'; slash = next) {

 		next = strchr(slash + 1, '/');

 		memcpy(p, slash, next - slash);

 		p += next - slash;

 		*p = '\0';

 		if (stat(buffer, &buf) == 0) {

 			if (!S_ISDIR(buf.st_mode)) {

 				fprintf(stderr,

 					"%s exists but is not a directory\n",

 					buffer);

 				return -1;

 			}

 		} else if (mkdir(buffer, 0777) < 0) {

 			fprintf(stderr, "failed to make directory %s: %m\n",

 				buffer);

 			return -1;

 		}

 		/* FIXME: What to do about permissions for dirs we

 		 * have to create but are not in the cpio archive? */

 	}

 	return 0;

 }

 int

 razor_write(int fd, const void *data, size_t size)

 {

 	size_t rest;

 	ssize_t written;

 	const unsigned char *p;

 	rest = size;

 	p = data;

 	while (rest > 0) {

 		written = write(fd, p, rest);

 		if (written < 0) {

 			fprintf(stderr, "write error: %m\n");

 			return -1;

 		}

 		rest -= written;

 		p += written;

 	}

 	return 0;

 }