source: trunk/src/kash/shinstance.h@ 2017

Last change on this file since 2017 was 1785, checked in by bird, 17 years ago

kash: fixed signals. trace all wrapped system calls.
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1/* $Id: shinstance.h 1785 2008-09-14 17:31:16Z bird $ */
2/** @file
3 *
4 * The shell instance and it's methods.
5 *
6 * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
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#ifndef _MSC_VER
33# include <termios.h>
34# include <sys/ioctl.h>
35# include <sys/resource.h>
36#endif
37#include <errno.h>
38#ifdef _MSC_VER
39# define EWOULDBLOCK 512
40#endif
41
42#include "shtypes.h"
43#include "shthread.h"
44#include "shfile.h"
45#include "shell.h"
46#include "output.h"
47#include "options.h"
48
49#include "expand.h"
50#include "exec.h"
51#include "var.h"
52#include "show.h"
53
54#ifdef _MSC_VER
55# define strcasecmp stricmp
56# define strncasecmp strnicmp
57#endif
58
59
60/* memalloc.c */
61#define MINSIZE 504 /* minimum size of a block */
62struct stack_block {
63 struct stack_block *prev;
64 char space[MINSIZE];
65};
66
67/* input.c */
68struct strpush {
69 struct strpush *prev; /* preceding string on stack */
70 char *prevstring;
71 int prevnleft;
72 int prevlleft;
73 struct alias *ap; /* if push was associated with an alias */
74};
75
76/*
77 * The parsefile structure pointed to by the global variable parsefile
78 * contains information about the current file being read.
79 */
80struct parsefile {
81 struct parsefile *prev; /* preceding file on stack */
82 int linno; /* current line */
83 int fd; /* file descriptor (or -1 if string) */
84 int nleft; /* number of chars left in this line */
85 int lleft; /* number of chars left in this buffer */
86 char *nextc; /* next char in buffer */
87 char *buf; /* input buffer */
88 struct strpush *strpush; /* for pushing strings at this level */
89 struct strpush basestrpush; /* so pushing one is fast */
90};
91
92/* exec.c */
93#define CMDTABLESIZE 31 /* should be prime */
94#define ARB 1 /* actual size determined at run time */
95
96struct tblentry {
97 struct tblentry *next; /* next entry in hash chain */
98 union param param; /* definition of builtin function */
99 short cmdtype; /* index identifying command */
100 char rehash; /* if set, cd done since entry created */
101 char cmdname[ARB]; /* name of command */
102};
103
104/* expand.c */
105/*
106 * Structure specifying which parts of the string should be searched
107 * for IFS characters.
108 */
109struct ifsregion {
110 struct ifsregion *next; /* next region in list */
111 int begoff; /* offset of start of region */
112 int endoff; /* offset of end of region */
113 int inquotes; /* search for nul bytes only */
114};
115
116
117/**
118 * A shell instance.
119 *
120 * This is the core structure of the shell, it contains all
121 * the data associated with a shell process except that it's
122 * running in a thread and not a separate process.
123 */
124struct shinstance
125{
126 struct shinstance *next; /**< The next shell instance. */
127 struct shinstance *prev; /**< The previous shell instance. */
128 struct shinstance *parent; /**< The parent shell instance. */
129 pid_t pid; /**< The (fake) process id of this shell instance. */
130 shtid tid; /**< The thread identifier of the thread for this shell. */
131 shfdtab fdtab; /**< The file descriptor table. */
132 shsigaction_t sigactions[NSIG]; /**< The signal actions registered with this shell instance. */
133
134 /* alias.c */
135#define ATABSIZE 39
136 struct alias *atab[ATABSIZE];
137
138 /* cd.c */
139 char *curdir; /**< current working directory */
140 char *prevdir; /**< previous working directory */
141 char *cdcomppath;
142 int getpwd_first; /**< static in getpwd. (initialized to 1!) */
143
144 /* error.h */
145 struct jmploc *handler;
146 int exception;
147 int exerrno/* = 0 */; /**< Last exec error */
148 int volatile suppressint;
149 int volatile intpending;
150
151 /* error.c */
152 char errmsg_buf[16]; /**< static in errmsg. (bss) */
153
154 /* eval.h */
155 char *commandname; /**< currently executing command */
156 int exitstatus; /**< exit status of last command */
157 int back_exitstatus;/**< exit status of backquoted command */
158 struct strlist *cmdenviron; /**< environment for builtin command */
159 int funcnest; /**< depth of function calls */
160 int evalskip; /**< set if we are skipping commands */
161 int skipcount; /**< number of levels to skip */
162 int loopnest; /**< current loop nesting level */
163
164 /* eval.c */
165 int vforked;
166
167 /* expand.c */
168 char *expdest; /**< output of current string */
169 struct nodelist *argbackq; /**< list of back quote expressions */
170 struct ifsregion ifsfirst; /**< first struct in list of ifs regions */
171 struct ifsregion *ifslastp; /**< last struct in list */
172 struct arglist exparg; /**< holds expanded arg list */
173 char *expdir; /**< Used by expandmeta. */
174
175 /* exec.h */
176 const char *pathopt; /**< set by padvance */
177
178 /* exec.c */
179 struct tblentry *cmdtable[CMDTABLESIZE];
180 int builtinloc/* = -1*/; /**< index in path of %builtin, or -1 */
181
182 /* input.h */
183 int plinno/* = 1 */;/**< input line number */
184 int parsenleft; /**< number of characters left in input buffer */
185 char *parsenextc; /**< next character in input buffer */
186 int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
187
188 /* input.c */
189 int parselleft; /**< copy of parsefile->lleft */
190 struct parsefile basepf; /**< top level input file */
191 char basebuf[BUFSIZ];/**< buffer for top level input file */
192 struct parsefile *parsefile/* = &basepf*/; /**< current input file */
193#ifndef SMALL
194 EditLine *el; /**< cookie for editline package */
195#endif
196
197 /* jobs.h */
198 pid_t backgndpid/* = -1 */; /**< pid of last background process */
199 int job_warning; /**< user was warned about stopped jobs */
200
201 /* jobs.c */
202 struct job *jobtab; /**< array of jobs */
203 int njobs; /**< size of array */
204 int jobs_invalid; /**< set in child */
205 int initialpgrp; /**< pgrp of shell on invocation */
206 int curjob/* = -1*/;/**< current job */
207 int ttyfd/* = -1*/;
208 int jobctl; /**< job control enabled / disabled */
209 char *cmdnextc;
210 int cmdnleft;
211
212
213 /* mail.c */
214#define MAXMBOXES 10
215 int nmboxes; /**< number of mailboxes */
216 time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
217
218 /* main.h */
219 int rootpid; /**< pid of main shell. */
220 int rootshell; /**< true if we aren't a child of the main shell. */
221 struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
222
223 /* memalloc.h */
224 char *stacknxt/* = stackbase.space*/;
225 int stacknleft/* = MINSIZE*/;
226 int sstrnleft;
227 int herefd/* = -1 */;
228
229 /* memalloc.c */
230 struct stack_block stackbase;
231 struct stack_block *stackp/* = &stackbase*/;
232 struct stackmark *markp;
233
234 /* myhistedit.h */
235 int displayhist;
236#ifndef SMALL
237 History *hist;
238 EditLine *el;
239#endif
240
241 /* output.h */
242 struct output output;
243 struct output errout;
244 struct output memout;
245 struct output *out1;
246 struct output *out2;
247
248 /* output.c */
249#define OUTBUFSIZ BUFSIZ
250#define MEM_OUT -3 /**< output to dynamically allocated memory */
251
252 /* options.h */
253 struct optent optlist[NOPTS];
254 char *minusc; /**< argument to -c option */
255 char *arg0; /**< $0 */
256 struct shparam shellparam; /**< $@ */
257 char **argptr; /**< argument list for builtin commands */
258 char *optionarg; /**< set by nextopt */
259 char *optptr; /**< used by nextopt */
260
261 /* parse.h */
262 int tokpushback;
263 int whichprompt; /**< 1 == PS1, 2 == PS2 */
264
265 /* parser.c */
266 int noalias/* = 0*/;/**< when set, don't handle aliases */
267 struct heredoc *heredoclist; /**< list of here documents to read */
268 int parsebackquote; /**< nonzero if we are inside backquotes */
269 int doprompt; /**< if set, prompt the user */
270 int needprompt; /**< true if interactive and at start of line */
271 int lasttoken; /**< last token read */
272 char *wordtext; /**< text of last word returned by readtoken */
273 int checkkwd; /**< 1 == check for kwds, 2 == also eat newlines */
274 struct nodelist *backquotelist;
275 union node *redirnode;
276 struct heredoc *heredoc;
277 int quoteflag; /**< set if (part of) last token was quoted */
278 int startlinno; /**< line # where last token started */
279
280 /* redir.c */
281 struct redirtab *redirlist;
282 int fd0_redirected/* = 0*/;
283
284 /* trap.h */
285 int pendingsigs; /**< indicates some signal received */
286
287 /* trap.c */
288 char gotsig[NSIG]; /**< indicates specified signal received */
289 char *trap[NSIG+1]; /**< trap handler commands */
290 char sigmode[NSIG]; /**< current value of signal */
291
292 /* var.h */
293 struct localvar *localvars;
294 struct var vatty;
295 struct var vifs;
296 struct var vmail;
297 struct var vmpath;
298 struct var vpath;
299#ifdef _MSC_VER
300 struct var vpath2;
301#endif
302 struct var vps1;
303 struct var vps2;
304 struct var vps4;
305#ifndef SMALL
306 struct var vterm;
307 struct var vhistsize;
308#endif
309 struct var voptind;
310#ifdef PC_OS2_LIBPATHS
311 struct var libpath_vars[4];
312#endif
313#ifdef SMALL
314# define VTABSIZE 39
315#else
316# define VTABSIZE 517
317#endif
318 struct var *vartab[VTABSIZE];
319
320 /* builtins.h */
321
322 /* bltin/test.c */
323 char **t_wp;
324 struct t_op const *t_wp_op;
325
326};
327
328
329extern shinstance *sh_create_root_shell(shinstance *, int, char **);
330
331/* environment & pwd.h */
332char *sh_getenv(shinstance *, const char *);
333char **sh_environ(shinstance *);
334const char *sh_gethomedir(shinstance *, const char *);
335
336/* signals */
337#define SH_SIG_UNK ((shsig_t)(intptr_t)-199)
338#define SH_SIG_DFL ((shsig_t)SIG_DFL)
339#define SH_SIG_IGN ((shsig_t)SIG_IGN)
340#define SH_SIG_ERR ((shsig_t)SIG_ERR)
341#ifdef _MSC_VER
342# define SIG_BLOCK 1
343# define SIG_UNBLOCK 2
344# define SIG_SETMASK 3
345# define SIGHUP 5
346# define SIGQUIT 9
347# define SIGPIPE 12
348# define SIGTTOU 17
349# define SIGTSTP 18
350# define SIGTTIN 19
351# define SIGCONT 20
352# define sys_siglist sys_signame
353#endif /* _MSC_VER */
354#ifdef __sun__
355# define sys_siglist _sys_siglist
356#endif
357#ifndef HAVE_SYS_SIGNAME
358extern char sys_signame[NSIG][16];
359#endif
360
361int sh_sigaction(shinstance *, int, const struct shsigaction *, struct shsigaction *);
362shsig_t sh_signal(shinstance *, int, shsig_t);
363int sh_siginterrupt(shinstance *, int, int);
364void sh_sigemptyset(shsigset_t *);
365int sh_sigfillset(shsigset_t *);
366void sh_sigaddset(shsigset_t *, int);
367void sh_sigdelset(shsigset_t *, int);
368int sh_sigismember(shsigset_t *, int);
369int sh_sigprocmask(shinstance *, int, shsigset_t const *, shsigset_t *);
370void sh_abort(shinstance *) __attribute__((__noreturn__));
371void sh_raise_sigint(shinstance *);
372int sh_kill(shinstance *, pid_t, int);
373int sh_killpg(shinstance *, pid_t, int);
374
375/* times */
376#include <time.h>
377#ifdef _MSC_VER
378 typedef struct shtms
379 {
380 clock_t tms_utime;
381 clock_t tms_stime;
382 clock_t tms_cutime;
383 clock_t tms_cstime;
384 } shtms;
385#else
386# include <sys/times.h>
387 typedef struct tms shtms;
388#endif
389clock_t sh_times(shinstance *, shtms *);
390int sh_sysconf_clk_tck(void);
391
392/* wait / process */
393#ifdef _MSC_VER
394# include <process.h>
395# define WNOHANG 1 /* Don't hang in wait. */
396# define WUNTRACED 2 /* Tell about stopped, untraced children. */
397# define WCONTINUED 4 /* Report a job control continued process. */
398# define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
399# define WCOREFLAG 0200
400# define _WSTATUS(x) (_W_INT(x) & 0177)
401# define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
402# define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
403# define WSTOPSIG(x) (_W_INT(x) >> 8)
404# define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
405# define WTERMSIG(x) (_WSTATUS(x))
406# define WIFEXITED(x) (_WSTATUS(x) == 0)
407# define WEXITSTATUS(x) (_W_INT(x) >> 8)
408# define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
409# define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
410# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
411# define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
412#else
413# include <sys/wait.h>
414#endif
415pid_t sh_fork(shinstance *);
416pid_t sh_waitpid(shinstance *, pid_t, int *, int);
417void sh__exit(shinstance *, int) __attribute__((__noreturn__));
418int sh_execve(shinstance *, const char *, const char * const*, const char * const *);
419uid_t sh_getuid(shinstance *);
420uid_t sh_geteuid(shinstance *);
421gid_t sh_getgid(shinstance *);
422gid_t sh_getegid(shinstance *);
423pid_t sh_getpid(shinstance *);
424pid_t sh_getpgrp(shinstance *);
425pid_t sh_getpgid(shinstance *, pid_t);
426int sh_setpgid(shinstance *, pid_t, pid_t);
427
428/* tc* */
429pid_t sh_tcgetpgrp(shinstance *, int);
430int sh_tcsetpgrp(shinstance *, int, pid_t);
431
432/* sys/resource.h */
433#ifdef _MSC_VER
434 typedef int64_t shrlim_t;
435 typedef struct shrlimit
436 {
437 shrlim_t rlim_cur;
438 shrlim_t rlim_max;
439 } shrlimit;
440# define RLIMIT_CPU 0
441# define RLIMIT_FSIZE 1
442# define RLIMIT_DATA 2
443# define RLIMIT_STACK 3
444# define RLIMIT_CORE 4
445# define RLIMIT_RSS 5
446# define RLIMIT_MEMLOCK 6
447# define RLIMIT_NPROC 7
448# define RLIMIT_NOFILE 8
449# define RLIMIT_SBSIZE 9
450# define RLIMIT_VMEM 10
451# define RLIM_NLIMITS 11
452# define RLIM_INFINITY (0x7fffffffffffffffLL)
453#else
454 typedef rlim_t shrlim_t;
455 typedef struct rlimit shrlimit;
456#endif
457int sh_getrlimit(shinstance *, int, shrlimit *);
458int sh_setrlimit(shinstance *, int, const shrlimit *);
459
460
461#ifdef DEBUG
462# define TRACE2(param) trace param
463# define TRACE2V(param) tracev param
464#else
465# define TRACE2(param)
466# define TRACE2V(param)
467#endif
468
469#endif
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