source: trunk/src/kash/shinstance.h@ 2562

Last change on this file since 2562 was 2546, checked in by bird, 14 years ago

Applied modified patches for Haiku support from Mike Smith.
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File size: 16.9 KB
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1/* $Id: shinstance.h 2546 2011-10-01 19:49:54Z bird $ */
2/** @file
3 * The shell instance and it's methods.
4 */
5
6/*
7 * Copyright (c) 2007-2010 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
8 *
9 *
10 * This file is part of kBuild.
11 *
12 * kBuild is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * kBuild is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with kBuild; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27
28#ifndef ___shinstance_h
29#define ___shinstance_h
30
31#include <stdio.h> /* BUFSIZ */
32#include <signal.h> /* NSIG */
33#ifndef _MSC_VER
34# include <termios.h>
35# include <sys/types.h>
36# include <sys/ioctl.h>
37# include <sys/resource.h>
38#endif
39#include <errno.h>
40#ifdef _MSC_VER
41# define EWOULDBLOCK 512
42#endif
43
44#include "shtypes.h"
45#include "shthread.h"
46#include "shfile.h"
47#include "shheap.h"
48#include "shell.h"
49#include "output.h"
50#include "options.h"
51
52#include "expand.h"
53#include "exec.h"
54#include "var.h"
55#include "show.h"
56
57#ifdef _MSC_VER
58# define strcasecmp stricmp
59# define strncasecmp strnicmp
60#endif
61
62/**
63 * A child process.
64 */
65typedef struct shchild
66{
67 pid_t pid; /**< The pid. */
68#if K_OS == K_OS_WINDOWS
69 void *hChild; /**< The process handle. */
70#endif
71} shchild;
72
73/* memalloc.c */
74#define MINSIZE 504 /* minimum size of a block */
75struct stack_block {
76 struct stack_block *prev;
77 char space[MINSIZE];
78};
79
80/* input.c */
81struct strpush {
82 struct strpush *prev; /* preceding string on stack */
83 char *prevstring;
84 int prevnleft;
85 int prevlleft;
86 struct alias *ap; /* if push was associated with an alias */
87};
88
89/*
90 * The parsefile structure pointed to by the global variable parsefile
91 * contains information about the current file being read.
92 */
93struct parsefile {
94 struct parsefile *prev; /* preceding file on stack */
95 int linno; /* current line */
96 int fd; /* file descriptor (or -1 if string) */
97 int nleft; /* number of chars left in this line */
98 int lleft; /* number of chars left in this buffer */
99 char *nextc; /* next char in buffer */
100 char *buf; /* input buffer */
101 struct strpush *strpush; /* for pushing strings at this level */
102 struct strpush basestrpush; /* so pushing one is fast */
103};
104
105/* exec.c */
106#define CMDTABLESIZE 31 /* should be prime */
107#define ARB 1 /* actual size determined at run time */
108
109struct tblentry {
110 struct tblentry *next; /* next entry in hash chain */
111 union param param; /* definition of builtin function */
112 short cmdtype; /* index identifying command */
113 char rehash; /* if set, cd done since entry created */
114 char cmdname[ARB]; /* name of command */
115};
116
117/* expand.c */
118/*
119 * Structure specifying which parts of the string should be searched
120 * for IFS characters.
121 */
122struct ifsregion {
123 struct ifsregion *next; /* next region in list */
124 int begoff; /* offset of start of region */
125 int endoff; /* offset of end of region */
126 int inquotes; /* search for nul bytes only */
127};
128
129
130/**
131 * A shell instance.
132 *
133 * This is the core structure of the shell, it contains all
134 * the data associated with a shell process except that it's
135 * running in a thread and not a separate process.
136 */
137struct shinstance
138{
139 struct shinstance *next; /**< The next shell instance. */
140 struct shinstance *prev; /**< The previous shell instance. */
141 struct shinstance *parent; /**< The parent shell instance. */
142 pid_t pid; /**< The (fake) process id of this shell instance. */
143 shtid tid; /**< The thread identifier of the thread for this shell. */
144 shfdtab fdtab; /**< The file descriptor table. */
145 shsigaction_t sigactions[NSIG]; /**< The signal actions registered with this shell instance. */
146 shsigset_t sigmask; /**< Our signal mask. */
147 char **shenviron; /**< The environment vector. */
148 int num_children; /**< Number of children in the array. */
149 shchild *children; /**< The child array. */
150
151 /* alias.c */
152#define ATABSIZE 39
153 struct alias *atab[ATABSIZE];
154
155 /* cd.c */
156 char *curdir; /**< current working directory */
157 char *prevdir; /**< previous working directory */
158 char *cdcomppath;
159 int getpwd_first; /**< static in getpwd. (initialized to 1!) */
160
161 /* error.h */
162 struct jmploc *handler;
163 int exception;
164 int exerrno/* = 0 */; /**< Last exec error */
165 int volatile suppressint;
166 int volatile intpending;
167
168 /* error.c */
169 char errmsg_buf[16]; /**< static in errmsg. (bss) */
170
171 /* eval.h */
172 char *commandname; /**< currently executing command */
173 int exitstatus; /**< exit status of last command */
174 int back_exitstatus;/**< exit status of backquoted command */
175 struct strlist *cmdenviron; /**< environment for builtin command */
176 int funcnest; /**< depth of function calls */
177 int evalskip; /**< set if we are skipping commands */
178 int skipcount; /**< number of levels to skip */
179 int loopnest; /**< current loop nesting level */
180
181 /* eval.c */
182 int vforked;
183
184 /* expand.c */
185 char *expdest; /**< output of current string */
186 struct nodelist *argbackq; /**< list of back quote expressions */
187 struct ifsregion ifsfirst; /**< first struct in list of ifs regions */
188 struct ifsregion *ifslastp; /**< last struct in list */
189 struct arglist exparg; /**< holds expanded arg list */
190 char *expdir; /**< Used by expandmeta. */
191
192 /* exec.h */
193 const char *pathopt; /**< set by padvance */
194
195 /* exec.c */
196 struct tblentry *cmdtable[CMDTABLESIZE];
197 int builtinloc/* = -1*/; /**< index in path of %builtin, or -1 */
198
199 /* input.h */
200 int plinno/* = 1 */;/**< input line number */
201 int parsenleft; /**< number of characters left in input buffer */
202 char *parsenextc; /**< next character in input buffer */
203 int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
204
205 /* input.c */
206 int parselleft; /**< copy of parsefile->lleft */
207 struct parsefile basepf; /**< top level input file */
208 char basebuf[BUFSIZ];/**< buffer for top level input file */
209 struct parsefile *parsefile/* = &basepf*/; /**< current input file */
210#ifndef SMALL
211 EditLine *el; /**< cookie for editline package */
212#endif
213
214 /* jobs.h */
215 pid_t backgndpid/* = -1 */; /**< pid of last background process */
216 int job_warning; /**< user was warned about stopped jobs */
217
218 /* jobs.c */
219 struct job *jobtab; /**< array of jobs */
220 int njobs; /**< size of array */
221 int jobs_invalid; /**< set in child */
222 int initialpgrp; /**< pgrp of shell on invocation */
223 int curjob/* = -1*/;/**< current job */
224 int ttyfd/* = -1*/;
225 int jobctl; /**< job control enabled / disabled */
226 char *cmdnextc;
227 int cmdnleft;
228
229
230 /* mail.c */
231#define MAXMBOXES 10
232 int nmboxes; /**< number of mailboxes */
233 time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
234
235 /* main.h */
236 int rootpid; /**< pid of main shell. */
237 int rootshell; /**< true if we aren't a child of the main shell. */
238 struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
239
240 /* memalloc.h */
241 char *stacknxt/* = stackbase.space*/;
242 int stacknleft/* = MINSIZE*/;
243 int sstrnleft;
244 int herefd/* = -1 */;
245
246 /* memalloc.c */
247 struct stack_block stackbase;
248 struct stack_block *stackp/* = &stackbase*/;
249 struct stackmark *markp;
250
251 /* myhistedit.h */
252 int displayhist;
253#ifndef SMALL
254 History *hist;
255 EditLine *el;
256#endif
257
258 /* output.h */
259 struct output output;
260 struct output errout;
261 struct output memout;
262 struct output *out1;
263 struct output *out2;
264
265 /* output.c */
266#define OUTBUFSIZ BUFSIZ
267#define MEM_OUT -3 /**< output to dynamically allocated memory */
268
269 /* options.h */
270 struct optent optlist[NOPTS];
271 char *minusc; /**< argument to -c option */
272 char *arg0; /**< $0 */
273 struct shparam shellparam; /**< $@ */
274 char **argptr; /**< argument list for builtin commands */
275 char *optionarg; /**< set by nextopt */
276 char *optptr; /**< used by nextopt */
277
278 /* parse.h */
279 int tokpushback;
280 int whichprompt; /**< 1 == PS1, 2 == PS2 */
281
282 /* parser.c */
283 int noalias/* = 0*/;/**< when set, don't handle aliases */
284 struct heredoc *heredoclist; /**< list of here documents to read */
285 int parsebackquote; /**< nonzero if we are inside backquotes */
286 int doprompt; /**< if set, prompt the user */
287 int needprompt; /**< true if interactive and at start of line */
288 int lasttoken; /**< last token read */
289 char *wordtext; /**< text of last word returned by readtoken */
290 int checkkwd; /**< 1 == check for kwds, 2 == also eat newlines */
291 struct nodelist *backquotelist;
292 union node *redirnode;
293 struct heredoc *heredoc;
294 int quoteflag; /**< set if (part of) last token was quoted */
295 int startlinno; /**< line # where last token started */
296
297 /* redir.c */
298 struct redirtab *redirlist;
299 int fd0_redirected/* = 0*/;
300
301 /* show.c */
302 char tracebuf[1024];
303 size_t tracepos;
304 int tracefd;
305
306 /* trap.h */
307 int pendingsigs; /**< indicates some signal received */
308
309 /* trap.c */
310 char gotsig[NSIG]; /**< indicates specified signal received */
311 char *trap[NSIG+1]; /**< trap handler commands */
312 char sigmode[NSIG]; /**< current value of signal */
313
314 /* var.h */
315 struct localvar *localvars;
316 struct var vatty;
317 struct var vifs;
318 struct var vmail;
319 struct var vmpath;
320 struct var vpath;
321#ifdef _MSC_VER
322 struct var vpath2;
323#endif
324 struct var vps1;
325 struct var vps2;
326 struct var vps4;
327#ifndef SMALL
328 struct var vterm;
329 struct var vhistsize;
330#endif
331 struct var voptind;
332#ifdef PC_OS2_LIBPATHS
333 struct var libpath_vars[4];
334#endif
335#ifdef SMALL
336# define VTABSIZE 39
337#else
338# define VTABSIZE 517
339#endif
340 struct var *vartab[VTABSIZE];
341
342 /* builtins.h */
343
344 /* bltin/test.c */
345 char **t_wp;
346 struct t_op const *t_wp_op;
347
348};
349
350
351extern shinstance *sh_create_root_shell(shinstance *, int, char **, char **);
352
353/* environment & pwd.h */
354char *sh_getenv(shinstance *, const char *);
355char **sh_environ(shinstance *);
356const char *sh_gethomedir(shinstance *, const char *);
357
358/* signals */
359#define SH_SIG_UNK ((shsig_t)(intptr_t)-199)
360#define SH_SIG_DFL ((shsig_t)SIG_DFL)
361#define SH_SIG_IGN ((shsig_t)SIG_IGN)
362#define SH_SIG_ERR ((shsig_t)SIG_ERR)
363#ifdef _MSC_VER
364# define SA_RESTART 0x02
365# define SIG_BLOCK 1
366# define SIG_UNBLOCK 2
367# define SIG_SETMASK 3
368
369# define SIGHUP 1 /* _SIGHUP_IGNORE */
370/*# define SIGINT 2 */
371# define SIGQUIT 3 /* _SIGQUIT_IGNORE */
372/*# define SIGILL 4 */
373/*# define SIGFPE 8 */
374/*# define SIGSEGV 11 */
375# define SIGPIPE 13 /* _SIGPIPE_IGNORE */
376/*# define SIGTERM 15 */
377# define SIGTTIN 16 /* _SIGIOINT_IGNORE */
378# define SIGTSTP 17 /* _SIGSTOP_IGNORE */
379# define SIGTTOU 18
380# define SIGCONT 20
381/*# define SIGBREAK 21 */
382/*# define SIGABRT 22 */
383
384# define sys_siglist sys_signame
385#endif /* _MSC_VER */
386#ifdef __sun__
387# define sys_siglist _sys_siglist
388#endif
389#ifndef HAVE_SYS_SIGNAME
390extern char sys_signame[NSIG][16];
391#endif
392
393int sh_sigaction(shinstance *, int, const struct shsigaction *, struct shsigaction *);
394shsig_t sh_signal(shinstance *, int, shsig_t);
395int sh_siginterrupt(shinstance *, int, int);
396void sh_sigemptyset(shsigset_t *);
397void sh_sigfillset(shsigset_t *);
398void sh_sigaddset(shsigset_t *, int);
399void sh_sigdelset(shsigset_t *, int);
400int sh_sigismember(shsigset_t const *, int);
401int sh_sigprocmask(shinstance *, int, shsigset_t const *, shsigset_t *);
402SH_NORETURN_1 void sh_abort(shinstance *) SH_NORETURN_2;
403void sh_raise_sigint(shinstance *);
404int sh_kill(shinstance *, pid_t, int);
405int sh_killpg(shinstance *, pid_t, int);
406
407/* times */
408#include <time.h>
409#ifdef _MSC_VER
410 typedef struct shtms
411 {
412 clock_t tms_utime;
413 clock_t tms_stime;
414 clock_t tms_cutime;
415 clock_t tms_cstime;
416 } shtms;
417#else
418# include <sys/times.h>
419 typedef struct tms shtms;
420#endif
421clock_t sh_times(shinstance *, shtms *);
422int sh_sysconf_clk_tck(void);
423
424/* wait / process */
425int sh_add_child(shinstance *psh, pid_t pid, void *hChild);
426#ifdef _MSC_VER
427# include <process.h>
428# define WNOHANG 1 /* Don't hang in wait. */
429# define WUNTRACED 2 /* Tell about stopped, untraced children. */
430# define WCONTINUED 4 /* Report a job control continued process. */
431# define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
432# define WCOREFLAG 0200
433# define _WSTATUS(x) (_W_INT(x) & 0177)
434# define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
435# define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
436# define WSTOPSIG(x) (_W_INT(x) >> 8)
437# define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
438# define WTERMSIG(x) (_WSTATUS(x))
439# define WIFEXITED(x) (_WSTATUS(x) == 0)
440# define WEXITSTATUS(x) (_W_INT(x) >> 8)
441# define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
442# define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
443# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
444# define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
445#else
446# include <sys/wait.h>
447# ifdef __HAIKU__
448# define WCOREDUMP(x) (0) /** @todo check the haiku headers and see if this information is available or not... */
449# endif
450#endif
451pid_t sh_fork(shinstance *);
452pid_t sh_waitpid(shinstance *, pid_t, int *, int);
453SH_NORETURN_1 void sh__exit(shinstance *, int) SH_NORETURN_2;
454int sh_execve(shinstance *, const char *, const char * const*, const char * const *);
455uid_t sh_getuid(shinstance *);
456uid_t sh_geteuid(shinstance *);
457gid_t sh_getgid(shinstance *);
458gid_t sh_getegid(shinstance *);
459pid_t sh_getpid(shinstance *);
460pid_t sh_getpgrp(shinstance *);
461pid_t sh_getpgid(shinstance *, pid_t);
462int sh_setpgid(shinstance *, pid_t, pid_t);
463
464/* tc* */
465pid_t sh_tcgetpgrp(shinstance *, int);
466int sh_tcsetpgrp(shinstance *, int, pid_t);
467
468/* sys/resource.h */
469#ifdef _MSC_VER
470 typedef int64_t shrlim_t;
471 typedef struct shrlimit
472 {
473 shrlim_t rlim_cur;
474 shrlim_t rlim_max;
475 } shrlimit;
476# define RLIMIT_CPU 0
477# define RLIMIT_FSIZE 1
478# define RLIMIT_DATA 2
479# define RLIMIT_STACK 3
480# define RLIMIT_CORE 4
481# define RLIMIT_RSS 5
482# define RLIMIT_MEMLOCK 6
483# define RLIMIT_NPROC 7
484# define RLIMIT_NOFILE 8
485# define RLIMIT_SBSIZE 9
486# define RLIMIT_VMEM 10
487# define RLIM_NLIMITS 11
488# define RLIM_INFINITY (0x7fffffffffffffffLL)
489#else
490 typedef rlim_t shrlim_t;
491 typedef struct rlimit shrlimit;
492#endif
493int sh_getrlimit(shinstance *, int, shrlimit *);
494int sh_setrlimit(shinstance *, int, const shrlimit *);
495
496
497#ifdef DEBUG
498# define TRACE2(param) trace param
499# define TRACE2V(param) tracev param
500#else
501# define TRACE2(param)
502# define TRACE2V(param)
503#endif
504
505#endif
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