Konrad Rzeszutek wrote:
> + * Helper routines.
> + */
> +static int file_exist(const char *file)
> +{
> +
> + struct stat bootpath_stat;
> +
> + return !stat(file, &bootpath_stat);
> +}
> +
> +static int read_file(const char *file, char **contents)
> +{
> + int error, fd, bytes_read;
> + struct stat bootpath_stat;
> +
> + error = stat(file, &bootpath_stat);
> + if (error < 0) {
> + fprintf(stderr, "(%s:%d) stat %s, %s\n", __FILE__, __LINE__,
> + file, strerror(errno));
> + return error;
> + }
> +
> + *contents = malloc(bootpath_stat.st_size);
> + if (!*contents) {
> + error = ENOMEM;
> + fprintf(stderr, "(%s:%d) Could not allocate enough memory for "\
> + "%s: %s (%d)\n",
> + __FILE__, __LINE__, file, strerror(error), error);
> + return errno;
> + }
> +
> + fd = open(file, O_RDONLY);
> + if (fd < 0) {
> + fprintf(stderr, "(%s:%d): Could not open %s: %s (%d)\n",
> + __FILE__, __LINE__, file, strerror(errno), errno);
> + free(*contents);
> + return errno;
> + }
> +
> + bytes_read = read(fd, *contents, bootpath_stat.st_size);
> + close(fd);
> + if (bytes_read > bootpath_stat.st_size) {
> + fprintf(stderr, "(%s:%d) Read more data in than expected for "\
> + "%s: %s (%d)\n",
> + __FILE__, __LINE__, file, strerror(EIO), EIO);
> + free(*contents);
> + return errno;
> + }
> + /* chop() implementation */
> + if (*(*contents + (ssize_t)(bytes_read - 1)) == '\n')
> + *(*contents + (ssize_t) (bytes_read - 1)) = 0;
> +
> + return 0;
> +}
> +
> +static int read_data(const char *dir, const char *name, char *dst, ssize_t
> size)
> +{
> + char *data = NULL;
> + char file[FILENAMESZ];
> + int rc = 0;
> +
> + memset(file, 0, FILENAMESZ);
> + strncat(file, dir, FILENAMESZ);
> + strncat(file, name, FILENAMESZ);
> +
> + if (file_exist(file)) {
> + rc = read_file(file, &data);
> + if (debug)
> + fprintf(stderr, "(%s:%d) Read from %s:[%s]\n",
> + __FILE__, __LINE__, file, data);
> + if (!rc)
> + memcpy(dst, data, size);
> + free(data);
> + }
> +
> + return rc;
> +}
> +
> +static int read_int_data(const char *dir, const char *name, int *dst)
> +{
> + int rc = 0;
> + char contents[5]; /* The flag is a 1 byte value */
> +
> + rc = read_data(dir, name, (char *)&contents, sizeof(contents));
> + if (!rc)
> + *dst = atoi(contents);
> +
> + return rc;
> +}
> +
Konrad, could you convert this to the sysfs api in the open-iscsi git tree?
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