143 lines
5.0 KiB
C
143 lines
5.0 KiB
C
/* $NetBSD: tree.h,v 1.4 2004/07/07 19:20:09 mycroft Exp $ */
|
|
|
|
/*
|
|
* command trees for compile/execute
|
|
*/
|
|
|
|
/* $Id: tree.h,v 1.4 2004/07/07 19:20:09 mycroft Exp $ */
|
|
|
|
#define NOBLOCK ((struct op *)NULL)
|
|
#define NOWORD ((char *)NULL)
|
|
#define NOWORDS ((char **)NULL)
|
|
|
|
/*
|
|
* Description of a command or an operation on commands.
|
|
*/
|
|
struct op {
|
|
short type; /* operation type, see below */
|
|
union { /* WARNING: newtp(), tcopy() use evalflags = 0 to clear union */
|
|
short evalflags; /* TCOM: arg expansion eval() flags */
|
|
short ksh_func; /* TFUNC: function x (vs x()) */
|
|
} u;
|
|
char **args; /* arguments to a command */
|
|
char **vars; /* variable assignments */
|
|
struct ioword **ioact; /* IO actions (eg, < > >>) */
|
|
struct op *left, *right; /* descendents */
|
|
char *str; /* word for case; identifier for for,
|
|
* select, and functions;
|
|
* path to execute for TEXEC;
|
|
* time hook for TCOM.
|
|
*/
|
|
int lineno; /* TCOM/TFUNC: LINENO for this */
|
|
};
|
|
|
|
/* Tree.type values */
|
|
#define TEOF 0
|
|
#define TCOM 1 /* command */
|
|
#define TPAREN 2 /* (c-list) */
|
|
#define TPIPE 3 /* a | b */
|
|
#define TLIST 4 /* a ; b */
|
|
#define TOR 5 /* || */
|
|
#define TAND 6 /* && */
|
|
#define TBANG 7 /* ! */
|
|
#define TDBRACKET 8 /* [[ .. ]] */
|
|
#define TFOR 9
|
|
#define TSELECT 10
|
|
#define TCASE 11
|
|
#define TIF 12
|
|
#define TWHILE 13
|
|
#define TUNTIL 14
|
|
#define TELIF 15
|
|
#define TPAT 16 /* pattern in case */
|
|
#define TBRACE 17 /* {c-list} */
|
|
#define TASYNC 18 /* c & */
|
|
#define TFUNCT 19 /* function name { command; } */
|
|
#define TTIME 20 /* time pipeline */
|
|
#define TEXEC 21 /* fork/exec eval'd TCOM */
|
|
#define TCOPROC 22 /* coprocess |& */
|
|
|
|
/*
|
|
* prefix codes for words in command tree
|
|
*/
|
|
#define EOS 0 /* end of string */
|
|
#define CHAR 1 /* unquoted character */
|
|
#define QCHAR 2 /* quoted character */
|
|
#define COMSUB 3 /* $() substitution (0 terminated) */
|
|
#define EXPRSUB 4 /* $(()) substitution (0 terminated) */
|
|
#define OQUOTE 5 /* opening " or ' */
|
|
#define CQUOTE 6 /* closing " or ' */
|
|
#define OSUBST 7 /* opening ${ subst (followed by { or X) */
|
|
#define CSUBST 8 /* closing } of above (followed by } or X) */
|
|
#define OPAT 9 /* open pattern: *(, @(, etc. */
|
|
#define SPAT 10 /* separate pattern: | */
|
|
#define CPAT 11 /* close pattern: ) */
|
|
|
|
/*
|
|
* IO redirection
|
|
*/
|
|
struct ioword {
|
|
int unit; /* unit affected */
|
|
int flag; /* action (below) */
|
|
char *name; /* file name (unused if heredoc) */
|
|
char *delim; /* delimiter for <<,<<- */
|
|
char *heredoc;/* content of heredoc */
|
|
};
|
|
|
|
/* ioword.flag - type of redirection */
|
|
#define IOTYPE 0xF /* type: bits 0:3 */
|
|
#define IOREAD 0x1 /* < */
|
|
#define IOWRITE 0x2 /* > */
|
|
#define IORDWR 0x3 /* <>: todo */
|
|
#define IOHERE 0x4 /* << (here file) */
|
|
#define IOCAT 0x5 /* >> */
|
|
#define IODUP 0x6 /* <&/>& */
|
|
#define IOEVAL BIT(4) /* expand in << */
|
|
#define IOSKIP BIT(5) /* <<-, skip ^\t* */
|
|
#define IOCLOB BIT(6) /* >|, override -o noclobber */
|
|
#define IORDUP BIT(7) /* x<&y (as opposed to x>&y) */
|
|
#define IONAMEXP BIT(8) /* name has been expanded */
|
|
|
|
/* execute/exchild flags */
|
|
#define XEXEC BIT(0) /* execute without forking */
|
|
#define XFORK BIT(1) /* fork before executing */
|
|
#define XBGND BIT(2) /* command & */
|
|
#define XPIPEI BIT(3) /* input is pipe */
|
|
#define XPIPEO BIT(4) /* output is pipe */
|
|
#define XPIPE (XPIPEI|XPIPEO) /* member of pipe */
|
|
#define XXCOM BIT(5) /* `...` command */
|
|
#define XPCLOSE BIT(6) /* exchild: close close_fd in parent */
|
|
#define XCCLOSE BIT(7) /* exchild: close close_fd in child */
|
|
#define XERROK BIT(8) /* non-zero exit ok (for set -e) */
|
|
#define XCOPROC BIT(9) /* starting a co-process */
|
|
#define XTIME BIT(10) /* timing TCOM command */
|
|
#define XINTACT BIT(11) /* OS2: proc started from interactive session */
|
|
|
|
/*
|
|
* flags to control expansion of words (assumed by t->evalflags to fit
|
|
* in a short)
|
|
*/
|
|
#define DOBLANK BIT(0) /* perform blank interpretation */
|
|
#define DOGLOB BIT(1) /* expand [?* */
|
|
#define DOPAT BIT(2) /* quote *?[ */
|
|
#define DOTILDE BIT(3) /* normal ~ expansion (first char) */
|
|
#define DONTRUNCOMMAND BIT(4) /* do not run $(command) things */
|
|
#define DOASNTILDE BIT(5) /* assignment ~ expansion (after =, :) */
|
|
#define DOBRACE_ BIT(6) /* used by expand(): do brace expansion */
|
|
#define DOMAGIC_ BIT(7) /* used by expand(): string contains MAGIC */
|
|
#define DOTEMP_ BIT(8) /* ditto : in word part of ${..[%#=?]..} */
|
|
#define DOVACHECK BIT(9) /* var assign check (for typeset, set, etc) */
|
|
#define DOMARKDIRS BIT(10) /* force markdirs behaviour */
|
|
|
|
/*
|
|
* The arguments of [[ .. ]] expressions are kept in t->args[] and flags
|
|
* indicating how the arguments have been munged are kept in t->vars[].
|
|
* The contents of t->vars[] are stuffed strings (so they can be treated
|
|
* like all other t->vars[]) in which the second character is the one that
|
|
* is examined. The DB_* defines are the values for these second characters.
|
|
*/
|
|
#define DB_NORM 1 /* normal argument */
|
|
#define DB_OR 2 /* || -> -o conversion */
|
|
#define DB_AND 3 /* && -> -a conversion */
|
|
#define DB_BE 4 /* an inserted -BE */
|
|
#define DB_PAT 5 /* a pattern argument */
|