release/src/router/vsftpd/sysdeputil.h

   1 #ifndef VSF_SYSDEPUTIL_H
   2 #define VSF_SYSDEPUTIL_H
   3
   4 #ifndef VSF_FILESIZE_H
   5 #include "filesize.h"
   6 #endif
   7
   8 /* VSF_SYSDEPUTIL_H:
   9  * Support for highly system dependent features, and querying for support
  10  * or lack thereof
  11  * TODO: document functions!
  12  */
  13
  14 struct mystr;
  15
  16 /* Authentication of local users */
  17 /* Return 0 for fail, 1 for success */
  18 int vsf_sysdep_check_auth(struct mystr* p_user,
  19                           const struct mystr* p_pass,
  20                           const struct mystr* p_remote_host);
  21
  22 /* Support for fine grained privilege (capabilities) */
  23 int vsf_sysdep_has_capabilities(void);
  24 int vsf_sysdep_has_capabilities_as_non_root(void);
  25 void vsf_sysdep_keep_capabilities(void);
  26 enum ESysdepCapabilities
  27 {
  28   kCapabilityCAP_CHOWN = 1,
  29   kCapabilityCAP_NET_BIND_SERVICE = 2
  30   /* NOTE - next one will be 4, this is a bitfield */
  31 };
  32 void vsf_sysdep_adopt_capabilities(unsigned int caps);
  33
  34 /* Support for sendfile(), Linux-like interface. Collapses to a read/write
  35  * loop under the covers if the target system lacks support.
  36  */
  37 int vsf_sysutil_sendfile(const int out_fd, const int in_fd,
  38                          filesize_t* p_offset, filesize_t num_send,
  39                          unsigned int max_chunk);
  40
  41 /* Support for changing the process name as reported by the operating system.
  42  * A useful status monitor. NOTE - we don't guarantee that this call will
  43  * have any effect.
  44  */
  45 void vsf_sysutil_setproctitle_init(int argc, const char* argv[]);
  46 void vsf_sysutil_setproctitle(const char* p_text);
  47 void vsf_sysutil_setproctitle_str(const struct mystr* p_str);
  48 void vsf_sysutil_set_proctitle_prefix(const struct mystr* p_str);
  49
  50 /* For now, maps read/write private pages. API to be extended.. */
  51 void vsf_sysutil_map_anon_pages_init(void);
  52 void* vsf_sysutil_map_anon_pages(unsigned int length);
  53
  54 /* File descriptor passing/receiving */
  55 void vsf_sysutil_send_fd(int sock_fd, int send_fd);
  56 int vsf_sysutil_recv_fd(int sock_fd);
  57
  58 /* If supported, arrange for current process to die when parent dies. */
  59 void vsf_set_die_if_parent_dies();
  60 /* Or a softer version delivering SIGTERM. */
  61 void vsf_set_term_if_parent_dies();
  62
  63 /* If supported, the ability to fork into different secure namespaces (PID
  64  * and IPC. Fails back to normal fork() */
  65 int vsf_sysutil_fork_isolate_failok();
  66 /* Same as above, but in addition tries to fork into an empty network
  67  * namespace. Falls back to vsf_sysutil_fork_isolate_failok then normal fork().
  68  */
  69 int vsf_sysutil_fork_isolate_all_failok();
  70 /* If supported, the ability to fork into an empty network namespace.
  71  * Fails back to normal fork() */
  72 int vsf_sysutil_fork_newnet();
  73 int vsf_sysutil_getpid_nocache();
  74
  75 #endif /* VSF_SYSDEPUTIL_H */
  76