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Imported from ../bash-2.0.tar.gz.

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This commit is contained in:
Jari Aalto 1996-12-23 17:02:34 +00:00
commit ccc6cda312
502 changed files with 91988 additions and 69123 deletions
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56
command.h
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@ -19,8 +19,8 @@
with Bash; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#if !defined (_COMMAND_H)
#define _COMMAND_H
#if !defined (_COMMAND_H_)
#define _COMMAND_H_
#include "stdc.h"
@ -33,18 +33,45 @@ enum r_instruction {
r_duplicating_input_word, r_duplicating_output_word
};
/* Redirection errors. */
#define AMBIGUOUS_REDIRECT -1
#define NOCLOBBER_REDIRECT -2
#define RESTRICTED_REDIRECT -3 /* can only happen in restricted shells. */
#define OUTPUT_REDIRECT(ri) \
(ri == r_output_direction || ri == r_input_output || ri == r_err_and_out)
#define INPUT_REDIRECT(ri) \
(ri == r_input_direction || ri == r_inputa_direction || ri == r_input_output)
#define WRITE_REDIRECT(ri) \
(ri == r_output_direction || \
ri == r_input_output || \
ri == r_err_and_out || \
ri == r_appending_to || \
ri == r_output_force)
/* Command Types: */
enum command_type { cm_for, cm_case, cm_while, cm_if, cm_simple, cm_select,
cm_connection, cm_function_def, cm_until, cm_group };
/* Possible values for the `flags' field of a WORD_DESC. */
#define W_HASDOLLAR 0x01 /* Dollar sign present. */
#define W_QUOTED 0x02 /* Some form of quote character is present. */
#define W_ASSIGNMENT 0x04 /* This word is a variable assignment. */
#define W_GLOBEXP 0x08 /* This word is the result of a glob expansion. */
#define W_NOSPLIT 0x10 /* Do not perform word splitting on this word. */
/* Possible values for subshell_environment */
#define SUBSHELL_ASYNC 0x01 /* subshell caused by `command &' */
#define SUBSHELL_PAREN 0x02 /* subshell caused by ( ... ) */
#define SUBSHELL_COMSUB 0x04 /* subshell caused by `command` or $(command) */
#define SUBSHELL_FORK 0x08 /* subshell caused by executing a disk command */
/* A structure which represents a word. */
typedef struct word_desc {
char *word; /* Zero terminated string. */
int dollar_present; /* Non-zero means dollar sign present. */
int quoted; /* Non-zero means single, double, or back quote
or backslash is present. */
int assignment; /* Non-zero means that this word contains an
assignment. */
int flags; /* Flags associated with this word. */
} WORD_DESC;
/* A linked list of words. */
@ -92,6 +119,8 @@ typedef struct element {
#define CMD_NO_FUNCTIONS 0x10 /* Ignore functions during command lookup. */
#define CMD_INHIBIT_EXPANSION 0x20 /* Do not expand the command words. */
#define CMD_NO_FORK 0x40 /* Don't fork; just call execve */
#define CMD_TIME_PIPELINE 0x80 /* Time a pipeline */
#define CMD_TIME_POSIX 0x100 /* time -p; use POSIX.2 time output spec. */
/* What a command looks like. */
typedef struct command {
@ -184,19 +213,16 @@ typedef struct simple_com {
int line; /* line number the command starts on */
} SIMPLE_COM;
/* The "function_def" command. This isn't really a command, but it is
represented as such for now. If the function def appears within
`(' `)' the parser tries to set the SUBSHELL bit of the command. That
means that FUNCTION_DEF has to be run through the executor. Maybe this
command should be defined in a subshell. Who knows or cares. */
/* The "function definition" command. */
typedef struct function_def {
int ignore; /* See description of CMD flags. */
WORD_DESC *name; /* The name of the function. */
COMMAND *command; /* The parsed execution tree. */
int line; /* Line number the function def starts on. */
} FUNCTION_DEF;
/* A command that is `grouped' allows pipes to take effect over
the entire command structure. */
/* A command that is `grouped' allows pipes and redirections to affect all
commands in the group. */
typedef struct group_com {
int ignore; /* See description of CMD flags. */
COMMAND *command;
@ -212,4 +238,4 @@ extern REDIRECT *copy_redirect __P((REDIRECT *));
extern REDIRECT *copy_redirects __P((REDIRECT *));
extern COMMAND *copy_command __P((COMMAND *));
#endif /* _COMMAND_H */
#endif /* _COMMAND_H_ */