1 /* $NetBSD: csh.h,v 1.26 2013/07/16 17:47:43 christos Exp $ */
4 * Copyright (c) 1980, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * @(#)csh.h 8.1 (Berkeley) 5/31/93
38 * Fundamental definitions which may vary from system to system.
40 * BUFSIZE The i/o buffering size; also limits word size
41 * MAILINTVL How often to mailcheck; more often is more expensive
44 #define BUFSIZE 4096 /* default buffer size */
47 #define FORKSLEEP 10 /* delay loop on non-interactive fork failure */
48 #define MAILINTVL 600 /* 10 minutes */
51 * The shell moves std in/out/diag and the old std input away from units
52 * 0, 1, and 2 so that it is easy to set up these standards for invoked
55 #define FSHTTY 15 /* /dev/tty when manip pgrps */
56 #define FSHIN 16 /* Preferred desc for shell input */
57 #define FSHOUT 17 /* ... shell output */
58 #define FSHERR 18 /* ... shell diagnostics */
59 #define FOLDSTD 19 /* ... old std input */
62 #define xexit(n) done(n)
68 #define SAVE(a) (Strsave(str2short(a)))
72 #define SAVE(a) (strsave(a))
76 * Make sure a variable is not stored in a register by taking its address
77 * This is used where variables might be clobbered by longjmp.
79 #define UNREGISTER(a) (void) &a
81 typedef void *ioctl_t
; /* Third arg of ioctl */
89 #define xmalloc(i) Malloc(i)
90 #define xrealloc(p, i) Realloc(p, i)
91 #define xcalloc(n, s) Calloc(n, s)
92 #define xfree(p) Free(p)
95 FILE *cshin
, *cshout
, *csherr
;
97 #define isdir(d) (S_ISDIR(d.st_mode))
99 #define eq(a, b) (Strcmp(a, b) == 0)
101 /* globone() flags */
102 #define G_ERROR 0 /* default action: error if multiple words */
103 #define G_IGNORE 1 /* ignore the rest of the words */
104 #define G_APPEND 2 /* make a sentence by cat'ing the words */
109 int child
; /* Child shell ... errors cause exit */
110 int chkstop
; /* Warned of stopped jobs... allow exit */
111 int didfds
; /* Have setup i/o fd's for child */
112 int doneinp
; /* EOF indicator after reset from readc */
113 int exiterr
; /* Exit if error or non-zero exit status */
114 int haderr
; /* Reset was because of an error */
115 int havhash
; /* path hashing is available */
116 int intact
; /* We are interactive... therefore prompt */
117 int intty
; /* Input is a tty */
118 int justpr
; /* Just print because of :p hist mod */
119 int loginsh
; /* We are a loginsh -> .login/.logout */
120 int neednote
; /* Need to pnotify() */
121 int noexec
; /* Don't execute, just syntax check */
122 int pjobs
; /* want to print jobs if interrupted */
123 int setintr
; /* Set interrupts on/off -> Wait intr... */
124 int timflg
; /* Time the next waited for command */
127 extern int filec
; /* doing filename expansion */
133 Char
*arginp
; /* Argument input for sh -c and internal `xx` */
134 Char
*ffile
; /* Name of shell file for $0 */
135 int onelflg
; /* 2 -> need line for -t, 1 -> exit on read */
137 extern char *seterr
; /* Error message from scanner/parser */
138 Char
*shtemp
; /* Temp name for << shell files in /tmp */
140 #include <sys/resource.h>
141 #include <sys/time.h>
142 #include <sys/types.h>
144 struct timespec time0
; /* Time at which the shell started */
150 time_t chktim
; /* Time mail last checked */
151 Char
*doldol
; /* Character pid for $$ */
152 pid_t backpid
; /* Pid of the last background process */
153 gid_t egid
, gid
; /* Invokers gid */
154 uid_t euid
, uid
; /* Invokers uid */
155 int shpgrp
; /* Pgrp of shell */
156 int tpgrp
; /* Terminal process group */
158 /* If tpgrp is -1, leave tty alone! */
159 int opgrp
; /* Initial pgrp and tty pgrp */
163 * To be able to redirect i/o for builtins easily, the shell moves the i/o
164 * descriptors it uses away from 0,1,2.
165 * Ideally these should be in units which are closed across exec's
166 * (this saves work) but for version 6, this is not usually possible.
167 * The desired initial values for these descriptors are F{SHIN,...}.
169 int SHIN
; /* Current shell input (script) */
170 int SHOUT
; /* Shell output */
171 int SHERR
; /* Diagnostic output... shell errs go here */
172 int OLDSTD
; /* Old standard input (def for cmds) */
177 * Errors in scanning and parsing set up an error message to be printed
178 * at the end and complete. Other errors always cause a reset.
179 * Because of source commands and .cshrc we need nested error catches.
185 #define setexit() (setjmp(reslab))
186 #define reset() longjmp(reslab, 1)
187 /* Should use structure assignment here */
188 #define getexit(a) (void)memcpy((a), reslab, sizeof reslab)
189 #define resexit(a) (void)memcpy(reslab, (a), sizeof reslab)
191 Char
*gointr
; /* Label for an onintr transfer */
194 sig_t parintr
; /* Parents interrupt catch */
195 sig_t parterm
; /* Parents terminate catch */
198 * Lexical definitions.
200 * All lexical space is allocated dynamically.
201 * The eighth/sixteenth bit of characters is used to prevent recognition,
202 * and eventually stripped.
207 #define CHAR ((Char)0xff)
208 #define QUOTE ((Char)0x8000) /* 16nth char bit used for 'ing */
209 #define TRIM ((Char)0x7fff) /* Mask to strip quote bit */
211 #define CHAR ((Char)0x7f)
212 #define QUOTE ((Char)0x80) /* Eighth char bit used for 'ing */
213 #define TRIM ((Char)0x7f) /* Mask to strip quote bit */
216 int AsciiOnly
; /* If set only 7 bits is expected in characters */
219 * Each level of input has a buffered input structure.
220 * There are one or more blocks of buffered input for each level,
221 * exactly one if the input is seekable and tell is available.
222 * In other cases, the shell buffers enough blocks to keep all loops
226 off_t Bfseekp
; /* Seek pointer */
227 off_t Bfbobp
; /* Seekp of beginning of buffers */
228 off_t Bfeobp
; /* Seekp of end of buffers */
229 int Bfblocks
; /* Number of buffer blocks */
230 Char
**Bfbuf
; /* The array of buffer blocks */
234 * This structure allows us to seek inside aliases
238 #define I_SEEK -1 /* Invalid seek */
239 #define A_SEEK 0 /* Alias seek */
240 #define F_SEEK 1 /* File seek */
241 #define E_SEEK 2 /* Eval seek */
246 #define f_seek fc._f_seek
247 #define c_seek fc._c_seek
250 extern int aret
; /* What was the last character returned */
251 #define SEEKEQ(a, b) ((a)->type == (b)->type && \
252 (a)->f_seek == (b)->f_seek && \
253 (a)->a_seek == (b)->a_seek)
255 #define fseekp B.Bfseekp
256 #define fbobp B.Bfbobp
257 #define feobp B.Bfeobp
258 #define fblocks B.Bfblocks
262 * The shell finds commands in loops by reseeking the input
263 * For whiles, in particular, it reseeks to the beginning of the
264 * line the while was on; hence the while placement restrictions.
268 int cantell
; /* Is current source tellable ? */
271 * Input lines are parsed into doubly linked circular
272 * lists of words of the following form.
276 struct wordent
*prev
;
277 struct wordent
*next
;
281 * During word building, both in the initial lexical phase and
282 * when expanding $ variable substitutions, expansion by `!' and `$'
283 * must be inhibited when reading ahead in routines which are themselves
284 * processing `!' and `$' expansion or after characters such as `\' or in
285 * quotations. The following flags are passed to the getC routines
286 * telling them which of these substitutions are appropriate for the
287 * next character to be returned.
291 #define DOALL DODOL|DOEXCL
294 * Labuf implements a general buffer for lookahead during lexical operations.
295 * Text which is to be placed in the input stream can be stuck here.
296 * We stick parsed ahead $ constructs during initial input,
297 * process id's from `$$', and modified variable values (from qualifiers
298 * during expansion in sh.dol.c) here.
305 * Each command is parsed to a tree of command structures and
306 * flags are set bottom up during this process, to be propagated down
307 * as needed during the semantics/execution pass (sh.sem.c).
310 int t_dtyp
; /* Type of node */
311 #define NODE_COMMAND 1 /* t_dcom <t_dlef >t_drit */
312 #define NODE_PAREN 2 /* ( t_dspr ) <t_dlef >t_drit */
313 #define NODE_PIPE 3 /* t_dlef | t_drit */
314 #define NODE_LIST 4 /* t_dlef ; t_drit */
315 #define NODE_OR 5 /* t_dlef || t_drit */
316 #define NODE_AND 6 /* t_dlef && t_drit */
317 int t_dflg
; /* Flags, e.g. F_AMPERSAND|... */
318 #define F_SAVE (F_NICE|F_TIME|F_NOHUP) /* save these when re-doing */
320 #define F_AMPERSAND (1<<0) /* executes in background */
321 #define F_APPEND (1<<1) /* output is redirected >> */
322 #define F_PIPEIN (1<<2) /* input is a pipe */
323 #define F_PIPEOUT (1<<3) /* output is a pipe */
324 #define F_NOFORK (1<<4) /* don't fork, last ()ized cmd */
325 #define F_NOINTERRUPT (1<<5) /* should be immune from intr's */
327 #define F_STDERR (1<<7) /* redirect unit 2 with unit 1 */
328 #define F_OVERWRITE (1<<8) /* output was ! */
329 #define F_READ (1<<9) /* input redirection is << */
330 #define F_REPEAT (1<<10) /* reexec aft if, repeat,... */
331 #define F_NICE (1<<11) /* t_nice is meaningful */
332 #define F_NOHUP (1<<12) /* nohup this command */
333 #define F_TIME (1<<13) /* time this command */
335 Char
*T_dlef
; /* Input redirect word */
336 struct command
*T_dcar
; /* Left part of list/pipe */
339 Char
*T_drit
; /* Output redirect word */
340 struct command
*T_dcdr
; /* Right part of list/pipe */
342 #define t_dlef L.T_dlef
343 #define t_dcar L.T_dcar
344 #define t_drit R.T_drit
345 #define t_dcdr R.T_dcdr
346 Char
**t_dcom
; /* Command/argument vector */
347 struct command
*t_dspr
; /* Pointer to ()'d subtree */
353 * These are declared here because they want to be
354 * initialized in sh.init.c (to allow them to be made readonly)
357 extern struct biltins
{
359 void (*bfunct
)(Char
**, struct command
*);
360 short minargs
, maxargs
;
372 * The keywords for the parser
395 * Structure defining the existing while/foreach loops at this
396 * source level. Loops are implemented by seeking back in the
397 * input. For foreach (fe), the word list is attached here.
400 struct Ain w_start
; /* Point to restart loop */
401 struct Ain w_end
; /* End of loop (0 if unknown) */
402 Char
**w_fe
, **w_fe0
; /* Current/initial wordlist for fe */
403 Char
*w_fename
; /* Name for fe */
404 struct whyle
*w_next
; /* Next (more outer) loop */
410 * Aliases and variables are stored in AVL balanced binary trees.
413 Char
**vec
; /* Array of words which is the value */
414 Char
*v_name
; /* Name of variable/alias */
415 struct varent
*v_link
[3]; /* The links, see below */
416 int v_bal
; /* Balance factor */
419 #define v_left v_link[0]
420 #define v_right v_link[1]
421 #define v_parent v_link[2]
423 #define adrof(v) adrof1(v, &shvhed)
424 #define value(v) value1(v, &shvhed)
427 * The following are for interfacing redo substitution in
428 * aliases to the lexical routines.
430 struct wordent
*alhistp
; /* Argument list (first) */
431 struct wordent
*alhistt
; /* Node after last in arg list */
432 extern Char
**alvec
, *alvecp
; /* The (remnants of) alias vector */
435 * Filename/command name expansion variables
437 int gflag
; /* After tglob -> is globbing needed? */
439 #define MAXVARLEN 30 /* Maximum number of char in a variable name */
442 * Variables for filename expansion
444 extern long gargc
; /* Number args in gargv */
445 extern Char
**gargv
; /* Pointer to the (stack) arglist */
448 * Variables for command expansion.
450 extern Char
**pargv
; /* Pointer to the argv list space */
451 extern long pargc
; /* Count of arguments in pargv */
452 long pnleft
; /* Number of chars left in pargs */
453 Char
*pargs
; /* Pointer to start current word */
454 Char
*pargcp
; /* Current index into pargs */
459 * Each history list entry contains an embedded wordlist
460 * from the scanner, a number for the event, and a reference count
461 * to aid in discarding old entries.
463 * Essentially "invisible" entries are put on the history list
464 * when history substitution includes modifiers, and thrown away
465 * at the next discarding since their event numbers are very negative.
474 struct wordent paraml
; /* Current lexical word list */
475 int eventno
; /* Next events number */
476 int lastev
; /* Last event reference (default) */
478 Char HIST
; /* history invocation character */
479 Char HISTSUB
; /* auto-substitute character */
484 #ifndef SHORT_STRINGS
485 #define Strchr(a, b) strchr(a, b)
486 #define Strrchr(a, b) strrchr(a, b)
487 #define Strcat(a, b) strcat(a, b)
488 #define Strncat(a, b, c) strncat(a, b, c)
489 #define Strcpy(a, b) strcpy(a, b)
490 #define Strncpy(a, b, c) strncpy(a, b, c)
491 #define Strlen(a) strlen(a)
492 #define Strcmp(a, b) strcmp(a, b)
493 #define Strncmp(a, b, c) strncmp(a, b, c)
495 #define Strspl(a, b) strspl(a, b)
496 #define Strsave(a) strsave(a)
497 #define Strend(a) strend(a)
498 #define Strstr(a, b) strstr(a, b)
500 #define str2short(a) (a)
501 #define blk2short(a) saveblk(a)
502 #define short2blk(a) saveblk(a)
503 #define short2str(a) strip(a)
505 #define Strchr(a, b) s_strchr(a, b)
506 #define Strrchr(a, b) s_strrchr(a, b)
507 #define Strcat(a, b) s_strcat(a, b)
508 #define Strncat(a, b, c) s_strncat(a, b, c)
509 #define Strcpy(a, b) s_strcpy(a, b)
510 #define Strncpy(a, b, c) s_strncpy(a, b, c)
511 #define Strlen(a) s_strlen(a)
512 #define Strcmp(a, b) s_strcmp(a, b)
513 #define Strncmp(a, b, c) s_strncmp(a, b, c)
515 #define Strspl(a, b) s_strspl(a, b)
516 #define Strsave(a) s_strsave(a)
517 #define Strend(a) s_strend(a)
518 #define Strstr(a, b) s_strstr(a, b)
522 * setname is a macro to save space (see sh.err.c)
526 #define setname(a) (bname = (a))
536 /* word_chars is set by default to WORD_CHARS but can be overridden by
537 the worchars variable--if unset, reverts to WORD_CHARS */
541 #define WORD_CHARS "*?_-.[]~=" /* default chars besides alnums in words */
549 Char
*STR_WORD_CHARS
;
553 #include <histedit.h>
559 #endif /* !_CSH_H_ */