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source: kBuild/trunk/src/kash/shinstance.h@ 1210

Last change on this file since 1210 was 1210, checked in by bird, 17 years ago

var.c ++

File size: 13.9 KB
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1/* $Id: $ */
2/** @file
3 *
4 * The shell instance and it's methods.
5 *
6 * Copyright (c) 2007 knut st. osmundsen <[email protected]>
7 *
8 *
9 * This file is part of kBuild.
10 *
11 * kBuild is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * kBuild is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with kBuild; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 *
25 */
26
27#ifndef ___shinstance_h___
28#define ___shinstance_h___
29
30#include <stdio.h> /* BUFSIZ */
31#include <signal.h> /* NSIG */
32
33#include "shtypes.h"
34#include "shthread.h"
35#include "shfile.h"
36#include "output.h"
37#include "options.h"
38
39#include "expand.h"
40#include "exec.h"
41#include "var.h"
42
43/* memalloc.c */
44#define MINSIZE 504 /* minimum size of a block */
45struct stack_block {
46 struct stack_block *prev;
47 char space[MINSIZE];
48};
49
50/* input.c */
51struct strpush {
52 struct strpush *prev; /* preceding string on stack */
53 char *prevstring;
54 int prevnleft;
55 int prevlleft;
56 struct alias *ap; /* if push was associated with an alias */
57};
58
59/*
60 * The parsefile structure pointed to by the global variable parsefile
61 * contains information about the current file being read.
62 */
63struct parsefile {
64 struct parsefile *prev; /* preceding file on stack */
65 int linno; /* current line */
66 int fd; /* file descriptor (or -1 if string) */
67 int nleft; /* number of chars left in this line */
68 int lleft; /* number of chars left in this buffer */
69 char *nextc; /* next char in buffer */
70 char *buf; /* input buffer */
71 struct strpush *strpush; /* for pushing strings at this level */
72 struct strpush basestrpush; /* so pushing one is fast */
73};
74
75/* exec.c */
76#define CMDTABLESIZE 31 /* should be prime */
77#define ARB 1 /* actual size determined at run time */
78
79struct tblentry {
80 struct tblentry *next; /* next entry in hash chain */
81 union param param; /* definition of builtin function */
82 short cmdtype; /* index identifying command */
83 char rehash; /* if set, cd done since entry created */
84 char cmdname[ARB]; /* name of command */
85};
86
87/* expand.c */
88/*
89 * Structure specifying which parts of the string should be searched
90 * for IFS characters.
91 */
92struct ifsregion {
93 struct ifsregion *next; /* next region in list */
94 int begoff; /* offset of start of region */
95 int endoff; /* offset of end of region */
96 int inquotes; /* search for nul bytes only */
97};
98
99
100/**
101 * A shell instance.
102 *
103 * This is the core structure of the shell, it contains all
104 * the data associated with a shell process except that it's
105 * running in a thread and not a separate process.
106 */
107typedef struct shinstance
108{
109 struct shinstance *next; /**< The next shell instance. */
110 struct shinstance *prev; /**< The previous shell instance. */
111 struct shinstance *parent; /**< The parent shell instance. */
112 pid_t pid; /**< The (fake) process id of this shell instance. */
113 shtid tid; /**< The thread identifier of the thread for this shell. */
114 shfdtab fdtab; /**< The file descriptor table. */
115
116 /* error.h */
117 struct jmploc *handler;
118 int exception;
119 int exerrno/* = 0 */; /**< Last exec error */
120 int volatile suppressint;
121 int volatile intpending;
122
123 /* main.h */
124 int rootpid; /**< pid of main shell. */
125 int rootshell; /**< true if we aren't a child of the main shell. */
126 struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
127
128 /* trap.h */
129 int pendingsigs; /**< indicates some signal received */
130
131 /* trap.c */
132 char gotsig[NSIG]; /**< indicates specified signal received */
133 char *trap[NSIG+1]; /**< trap handler commands */
134 char sigmode[NSIG]; /**< current value of signal */
135
136 /* parse.h */
137 int tokpushback;
138 int whichprompt; /**< 1 == PS1, 2 == PS2 */
139
140 /* parser.c */
141 int noalias/* = 0*/;/**< when set, don't handle aliases */
142 struct heredoc *heredoclist; /**< list of here documents to read */
143 int parsebackquote; /**< nonzero if we are inside backquotes */
144 int doprompt; /**< if set, prompt the user */
145 int needprompt; /**< true if interactive and at start of line */
146 int lasttoken; /**< last token read */
147 char *wordtext; /**< text of last word returned by readtoken */
148 int checkkwd; /**< 1 == check for kwds, 2 == also eat newlines */
149 struct nodelist *backquotelist;
150 union node *redirnode;
151 struct heredoc *heredoc;
152 int quoteflag; /**< set if (part of) last token was quoted */
153 int startlinno; /**< line # where last token started */
154
155 /* output.h */
156 struct output output;
157 struct output errout;
158 struct output memout;
159 struct output *out1;
160 struct output *out2;
161 /* output.c */
162#define OUTBUFSIZ BUFSIZ
163#define MEM_OUT -3 /**< output to dynamically allocated memory */
164
165 /* options.h */
166 struct optent optlist[NOPTS];
167 char *minusc; /**< argument to -c option */
168 char *arg0; /**< $0 */
169 struct shparam shellparam; /**< $@ */
170 char **argptr; /**< argument list for builtin commands */
171 char *optionarg; /**< set by nextopt */
172 char *optptr; /**< used by nextopt */
173
174 /* var.h */
175 struct localvar *localvars;
176#if ATTY
177 struct var vatty;
178#endif
179 struct var vifs;
180 struct var vmail;
181 struct var vmpath;
182 struct var vpath;
183#ifdef _MSC_VER
184 struct var vpath2;
185#endif
186 struct var vps1;
187 struct var vps2;
188 struct var vps4;
189#ifndef SMALL
190 struct var vterm;
191 struct var vhistsize;
192#endif
193 struct var voptind;
194#ifdef PC_OS2_LIBPATHS
195 struct var libpath_vars[4];
196#endif
197#ifdef SMALL
198# define VTABSIZE 39
199#else
200# define VTABSIZE 517
201#endif
202 struct var *vartab[VTABSIZE];
203
204 /* myhistedit.h */
205 int displayhist;
206#ifndef SMALL
207 History *hist;
208 EditLine *el;
209#endif
210
211 /* memalloc.h */
212 char *stacknxt/* = stackbase.space*/;
213 int stacknleft/* = MINSIZE*/;
214 int sstrnleft;
215 int herefd/* = -1 */;
216
217 /* memalloc.c */
218 struct stack_block stackbase;
219 struct stack_block *stackp/* = &stackbase*/;
220 struct stackmark *markp;
221
222 /* jobs.h */
223 pid_t backgndpid/* = -1 */; /**< pid of last background process */
224 int job_warning; /**< user was warned about stopped jobs */
225
226 /* jobs.c */
227 struct job *jobtab; /**< array of jobs */
228 int njobs; /**< size of array */
229 int jobs_invalid; /**< set in child */
230#if JOBS
231 int initialpgrp; /**< pgrp of shell on invocation */
232 int curjob/* = -1*/;/**< current job */
233#endif
234 int ttyfd/* = -1*/;
235 int jobctl; /**< job control enabled / disabled */
236 char *cmdnextc;
237 int cmdnleft;
238
239 /* input.h */
240 int plinno/* = 1 */;/**< input line number */
241 int parsenleft; /**< number of characters left in input buffer */
242 char *parsenextc; /**< next character in input buffer */
243 int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
244
245 /* input.c */
246 int parselleft; /**< copy of parsefile->lleft */
247 struct parsefile basepf; /**< top level input file */
248 char basebuf[BUFSIZ];/**< buffer for top level input file */
249 struct parsefile *parsefile/* = &basepf*/; /**< current input file */
250#ifndef SMALL
251 EditLine *el; /**< cookie for editline package */
252#endif
253
254
255 /* exec.h */
256 const char *pathopt; /**< set by padvance */
257
258 /* exec.c */
259 struct tblentry *cmdtable[CMDTABLESIZE];
260 int builtinloc/* = -1*/; /**< index in path of %builtin, or -1 */
261
262
263 /* eval.h */
264 char *commandname; /**< currently executing command */
265 int exitstatus; /**< exit status of last command */
266 int back_exitstatus;/**< exit status of backquoted command */
267 struct strlist *cmdenviron; /**< environment for builtin command */
268 int funcnest; /**< depth of function calls */
269 int evalskip; /**< set if we are skipping commands */
270 int skipcount; /**< number of levels to skip */
271 int loopnest; /**< current loop nesting level */
272
273 /* builtins.h */
274
275 /* alias.c */
276#define ATABSIZE 39
277 struct alias *atab[ATABSIZE];
278
279 /* cd.c */
280 char *curdir; /**< current working directory */
281 char *prevdir; /**< previous working directory */
282 char *cdcomppath;
283 int getpwd_first; /**< static in getpwd. (initialized to 1!) */
284
285 /* error.c */
286 char errmsg_buf[16]; /**< static in errmsg. (bss) */
287
288 /* eval.c */
289 int vforked;
290
291 /* expand.c */
292 char *expdest; /**< output of current string */
293 struct nodelist *argbackq; /**< list of back quote expressions */
294 struct ifsregion ifsfirst; /**< first struct in list of ifs regions */
295 struct ifsregion *ifslastp; /**< last struct in list */
296 struct arglist exparg; /**< holds expanded arg list */
297 char *expdir; /**< Used by expandmeta. */
298
299 /* mail.c */
300#define MAXMBOXES 10
301 int nmboxes; /**< number of mailboxes */
302 time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
303
304 /* bltin/test.c */
305 char **t_wp;
306 struct t_op const *t_wp_op;
307
308} shinstance;
309
310
311extern shinstance *sh_create_root_shell(shinstance *, int, char **);
312char *sh_getenv(shinstance *, const char *);
313
314/* signals */
315typedef void (*sh_sig_t)(shinstance *, int);
316#ifdef _MSC_VER
317 typedef uint32_t sh_sigset_t;
318#else
319 typedef sigset_t sh_sigset_t;
320#endif
321struct sh_sigaction
322{
323 sh_sig_t sh_handler;
324 sh_sigset_t sh_mask;
325 int sh_flags;
326};
327#define SH_SIG_DFL ((sh_sig_t)SIG_DFL)
328#define SH_SIG_IGN ((sh_sig_t)SIG_IGN)
329
330int sh_sigaction(int, const struct sh_sigaction *, struct sh_sigaction *);
331sh_sig_t sh_signal(shinstance *, int, sh_sig_t);
332void sh_raise_sigint(shinstance *);
333void sh_sigemptyset(sh_sigset_t *);
334int sh_sigprocmask(shinstance *, int, sh_sigset_t const *, sh_sigset_t *);
335void sh_abort(shinstance *);
336
337/* times */
338#include <time.h>
339#ifdef _MSC_VER
340 typedef struct sh_tms
341 {
342 clock_t tms_utime;
343 clock_t tms_stime;
344 clock_t tms_cutime;
345 clock_t tms_cstime;
346 } sh_tms;
347#else
348# include <times.h>
349 typedef struct tms sh_tms;
350#endif
351clock_t sh_times(sh_tms *);
352int sh_sysconf_clk_tck(void);
353
354/* wait / process */
355#ifdef _MSC_VER
356# include <process.h>
357# define WNOHANG 1 /* Don't hang in wait. */
358# define WUNTRACED 2 /* Tell about stopped, untraced children. */
359# define WCONTINUED 4 /* Report a job control continued process. */
360# define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
361# define WCOREFLAG 0200
362# define _WSTATUS(x) (_W_INT(x) & 0177)
363# define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
364# define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
365# define WSTOPSIG(x) (_W_INT(x) >> 8)
366# define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
367# define WTERMSIG(x) (_WSTATUS(x))
368# define WIFEXITED(x) (_WSTATUS(x) == 0)
369# define WEXITSTATUS(x) (_W_INT(x) >> 8)
370# define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
371# define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
372# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
373# define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
374#else
375# include <sys/wait.h>
376#endif
377pid_t sh_waitpid(shinstance *, pid_t, int *, int);
378void sh__exit(shinstance *, int);
379int sh_execve(shinstance *, const char *, const char * const*, const char * const *);
380uid_t sh_getuid(shinstance *);
381uid_t sh_geteuid(shinstance *);
382gid_t sh_getgid(shinstance *);
383gid_t sh_getegid(shinstance *);
384pid_t sh_getpid(shinstance *);
385pid_t sh_getpgrp(shinstance *);
386pid_t sh_getpgid(shinstance *, pid_t);
387int sh_setpgid(shinstance *, pid_t, pid_t);
388int sh_killpg(shinstance *, pid_t, int);
389
390/* tc* */
391pid_t sh_tcgetpgrp(shinstance *, int);
392int sh_tcsetpgrp(shinstance *, int, pid_t);
393
394#endif
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