1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/util.c	Mon Feb 04 10:12:04 2008 -0500
     1.3 @@ -0,0 +1,68 @@
     1.4 +#include <limits.h>
     1.5 +#include <string.h>
     1.6 +#include <sys/stat.h>
     1.7 +#include <stdlib.h>
     1.8 +#include <stdio.h>
     1.9 +#include <unistd.h>
    1.10 +
    1.11 +int
    1.12 +razor_create_dir(const char *root, const char *path)
    1.13 +{
    1.14 +	char buffer[PATH_MAX], *p;
    1.15 +	const char *slash, *next;
    1.16 +	struct stat buf;
    1.17 +
    1.18 +	/* Create all sub-directories in dir and then create name. We
    1.19 +	 * know root exists and is a dir, root does not end in a '/',
    1.20 +	 * and path has a leading '/'. */
    1.21 +
    1.22 +	strcpy(buffer, root);
    1.23 +	p = buffer + strlen(buffer);
    1.24 +	slash = path;
    1.25 +	for (slash = path; slash[1] != '\0'; slash = next) {
    1.26 +		next = strchr(slash + 1, '/');
    1.27 +		memcpy(p, slash, next - slash);
    1.28 +		p += next - slash;
    1.29 +		*p = '\0';
    1.30 +
    1.31 +		if (stat(buffer, &buf) == 0) {
    1.32 +			if (!S_ISDIR(buf.st_mode)) {
    1.33 +				fprintf(stderr,
    1.34 +					"%s exists but is not a directory\n",
    1.35 +					buffer);
    1.36 +				return -1;
    1.37 +			}
    1.38 +		} else if (mkdir(buffer, 0777) < 0) {
    1.39 +			fprintf(stderr, "failed to make directory %s: %m\n",
    1.40 +				buffer);
    1.41 +			return -1;
    1.42 +		}
    1.43 +
    1.44 +		/* FIXME: What to do about permissions for dirs we
    1.45 +		 * have to create but are not in the cpio archive? */
    1.46 +	}
    1.47 +
    1.48 +	return 0;
    1.49 +}
    1.50 +
    1.51 +int
    1.52 +razor_write(int fd, const void *data, size_t size)
    1.53 +{
    1.54 +	size_t rest;
    1.55 +	ssize_t written;
    1.56 +	const unsigned char *p;
    1.57 +
    1.58 +	rest = size;
    1.59 +	p = data;
    1.60 +	while (rest > 0) {
    1.61 +		written = write(fd, p, rest);
    1.62 +		if (written < 0) {
    1.63 +			fprintf(stderr, "write error: %m\n");
    1.64 +			return -1;
    1.65 +		}
    1.66 +		rest -= written;
    1.67 +		p += written;
    1.68 +	}
    1.69 +
    1.70 +	return 0;
    1.71 +}