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- /* shell.h -- The data structures used by the shell */
-
- #include "config.h"
- #include "general.h"
- #include "error.h"
- #include "variables.h"
- #include "quit.h"
- #include "maxpath.h"
- #include "unwind_prot.h"
- #include "command.h"
-
- extern int EOF_Reached;
-
- #define NO_PIPE -1
- #define REDIRECT_BOTH -2
- #define IS_DESCRIPTOR -1
-
- #define NO_VARIABLE -1
-
- /* A bunch of stuff for flow of control using setjmp () and longjmp (). */
- #include <setjmp.h>
- extern jmp_buf top_level, catch;
-
- #define NOT_JUMPED 0 /* Not returning from a longjmp. */
- #define FORCE_EOF 1 /* We want to stop parsing. */
- #define DISCARD 2 /* Discard current command. */
- #define EXITPROG 3 /* Unconditionally exit the program now. */
-
- /* Values that can be returned by execute_command (). */
- #define EXECUTION_FAILURE 1
- #define EXECUTION_SUCCESS 0
-
- /* Special exit status used when the shell is asked to execute a
- binary file as a shell script. */
- #define EX_BINARY_FILE 126
-
- /* The list of characters that are quoted in double-quotes with a
- backslash. Other characters following a backslash cause nothing
- special to happen. */
- #define slashify_in_quotes "\\`$\""
- #define slashify_in_here_document "\\`$"
-
- /* Constants which specify how to handle backslashes and quoting in
- expand_word_internal (). Q_DOUBLE_QUOTES means to use the function
- slashify_in_quotes () to decide whether the backslash should be
- retained. Q_HERE_DOCUMENT means slashify_in_here_document () to
- decide whether to retain the backslash. Q_KEEP_BACKSLASH means
- to unconditionally retain the backslash. */
- #define Q_DOUBLE_QUOTES 0x1
- #define Q_HERE_DOCUMENT 0x2
- #define Q_KEEP_BACKSLASH 0x4
-
- extern char **shell_environment;
- extern WORD_LIST *rest_of_args;
-
- /* Generalized global variables. */
- extern int executing, login_shell;
-
- /* Structure to pass around that holds a bitmap of file descriptors
- to close, and the size of that structure. Used in execute_cmd.c. */
- struct fd_bitmap {
- long size;
- char *bitmap;
- };
-
- #define FD_BITMAP_SIZE 32
-