src/lxc/confile_utils.h

   1 /* liblxcapi
   2  *
   3  * Copyright © 2017 Christian Brauner <christian.brauner@ubuntu.com>.
   4  * Copyright © 2017 Canonical Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef __LXC_CONFILE_UTILS_H
  21 #define __LXC_CONFILE_UTILS_H
  22
  23 #include <stdbool.h>
  24
  25 #include "conf.h"
  26 #include "confile_utils.h"
  27
  28 #define strprint(str, inlen, ...)                                       \
  29         do {                                                            \
  30                 if (str)                                                \
  31                         len = snprintf(str, inlen, ##__VA_ARGS__);      \
  32                 else                                                    \
  33                         len = snprintf((char *){""}, 0, ##__VA_ARGS__); \
  34                 if (len < 0) {                                          \
  35                         SYSERROR("failed to create string");            \
  36                         return -1;                                      \
  37                 };                                                      \
  38                 fulllen += len;                                         \
  39                 if (inlen > 0) {                                        \
  40                         if (str)                                        \
  41                                 str += len;                             \
  42                         inlen -= len;                                   \
  43                         if (inlen < 0)                                  \
  44                                 inlen = 0;                              \
  45                 }                                                       \
  46         } while (0);
  47
  48 extern int parse_idmaps(const char *idmap, char *type, unsigned long *nsid,
  49                         unsigned long *hostid, unsigned long *range);
  50
  51 extern bool lxc_config_value_empty(const char *value);
  52 extern struct lxc_netdev *lxc_network_add(struct lxc_list *networks, int idx,
  53                                           bool tail);
  54 extern struct lxc_netdev *
  55 lxc_get_netdev_by_idx(struct lxc_conf *conf, unsigned int idx, bool allocate);
  56 extern void lxc_log_configured_netdevs(const struct lxc_conf *conf);
  57 extern bool lxc_remove_nic_by_idx(struct lxc_conf *conf, unsigned int idx);
  58 extern void lxc_free_networks(struct lxc_list *networks);
  59 extern int lxc_macvlan_mode_to_flag(int *mode, const char *value);
  60 extern char *lxc_macvlan_flag_to_mode(int mode);
  61
  62 extern int set_config_string_item(char **conf_item, const char *value);
  63 extern int set_config_string_item_max(char **conf_item, const char *value,
  64                                       size_t max);
  65 extern int set_config_path_item(char **conf_item, const char *value);
  66 extern int config_ip_prefix(struct in_addr *addr);
  67 extern int network_ifname(char *valuep, const char *value, size_t size);
  68 extern void rand_complete_hwaddr(char *hwaddr);
  69 extern bool lxc_config_net_is_hwaddr(const char *line);
  70 extern bool new_hwaddr(char *hwaddr);
  71 extern int lxc_get_conf_str(char *retv, int inlen, const char *value);
  72 extern int lxc_get_conf_bool(struct lxc_conf *c, char *retv, int inlen, bool v);
  73 extern int lxc_get_conf_int(struct lxc_conf *c, char *retv, int inlen, int v);
  74 extern int lxc_get_conf_size_t(struct lxc_conf *c, char *retv, int inlen, size_t v);
  75 extern int lxc_get_conf_uint64(struct lxc_conf *c, char *retv, int inlen, uint64_t v);
  76 extern bool parse_limit_value(const char **value, rlim_t *res);
  77 extern int lxc_inherit_namespace(const char *lxcname_or_pid,
  78                                  const char *lxcpath, const char *namespace);
  79 extern int sig_parse(const char *signame);
  80
  81 #endif /* __LXC_CONFILE_UTILS_H */