src/subshell.h

   1 /** \file subshell.h
   2  *  \brief Header: concurrent shell support
   3  */
   4
   5 #ifndef MC__SUBSHELL_H
   6 #define MC__SUBSHELL_H
   7
   8 /*** typedefs(not structures) and defined constants **********************************************/
   9
  10 /* Used to distinguish between a normal MC termination and */
  11 /* one caused by typing `exit' or `logout' in the subshell */
  12 #define SUBSHELL_EXIT 128
  13
  14 #ifdef HAVE_SUBSHELL_SUPPORT
  15
  16 /*** enums ***************************************************************************************/
  17
  18 /* State of the subshell; see subshell.c for an explanation */
  19
  20 enum subshell_state_enum
  21 { INACTIVE, ACTIVE, RUNNING_COMMAND };
  22
  23 /* For the `how' argument to various functions */
  24 enum
  25 { QUIETLY, VISIBLY };
  26
  27 /*** structures declarations (and typedefs of structures)*****************************************/
  28
  29 /*** global variables defined in .c file *********************************************************/
  30
  31 /* If using a subshell for evaluating commands this is true */
  32 extern int use_subshell;
  33
  34 /* File descriptor of the pseudoterminal used by the subshell */
  35 extern int subshell_pty;
  36
  37 extern enum subshell_state_enum subshell_state;
  38
  39 /* Holds the latest prompt captured from the subshell */
  40 extern char *subshell_prompt;
  41
  42 /*** declarations of public functions ************************************************************/
  43
  44 void init_subshell (void);
  45 int invoke_subshell (const char *command, int how, char **new_dir);
  46 int read_subshell_prompt (void);
  47 void resize_subshell (void);
  48 int exit_subshell (void);
  49 void do_subshell_chdir (const char *directory, int update_prompt, int reset_prompt);
  50 void subshell_get_console_attributes (void);
  51 void sigchld_handler (int sig);
  52
  53 #else /* not HAVE_SUBSHELL_SUPPORT */
  54 #define use_subshell 0
  55 #endif /* not HAVE_SUBSHELL_SUPPORT */
  56
  57 /*** inline functions ****************************************************************************/
  58 #endif /* MC__SUBSHELL_H */