shinstance.h@ 2989

Last change on this file since 2989 was 2657, checked in by bird, 12 years ago
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1	/* $Id: shinstance.h 2657 2012-09-10 20:57:58Z bird $ */
2	/** @file
3	* The shell instance and it's methods.
4	*/
5
6	/*
7	* Copyright (c) 2007-2010 knut st. osmundsen <[email protected]>
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 140
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	*/
65	typedef 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 */
75	struct stack_block {
76	struct stack_block *prev;
77	char space[MINSIZE];
78	};
79
80	/* input.c */
81	struct 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	*/
93	struct 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
109	struct 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	*/
122	struct 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	*/
137	struct 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
351	extern shinstance sh_create_root_shell(shinstance , int, char , char );
352
353	/* environment & pwd.h */
354	char sh_getenv(shinstance , const char *);
355	char *sh_environ(shinstance );
356	const 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
390	extern char sys_signame[NSIG][16];
391	#endif
392
393	int sh_sigaction(shinstance , int, const struct shsigaction , struct shsigaction *);
394	shsig_t sh_signal(shinstance *, int, shsig_t);
395	int sh_siginterrupt(shinstance *, int, int);
396	void sh_sigemptyset(shsigset_t *);
397	void sh_sigfillset(shsigset_t *);
398	void sh_sigaddset(shsigset_t *, int);
399	void sh_sigdelset(shsigset_t *, int);
400	int sh_sigismember(shsigset_t const *, int);
401	int sh_sigprocmask(shinstance , int, shsigset_t const , shsigset_t *);
402	SH_NORETURN_1 void sh_abort(shinstance *) SH_NORETURN_2;
403	void sh_raise_sigint(shinstance *);
404	int sh_kill(shinstance *, pid_t, int);
405	int 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
421	clock_t sh_times(shinstance , shtms );
422	int sh_sysconf_clk_tck(void);
423
424	/* wait / process */
425	int 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) WIFCORED(x)
449	# endif
450	#endif
451	pid_t sh_fork(shinstance *);
452	pid_t sh_waitpid(shinstance , pid_t, int , int);
453	SH_NORETURN_1 void sh__exit(shinstance *, int) SH_NORETURN_2;
454	int sh_execve(shinstance , const char , const char * const, const char const *);
455	uid_t sh_getuid(shinstance *);
456	uid_t sh_geteuid(shinstance *);
457	gid_t sh_getgid(shinstance *);
458	gid_t sh_getegid(shinstance *);
459	pid_t sh_getpid(shinstance *);
460	pid_t sh_getpgrp(shinstance *);
461	pid_t sh_getpgid(shinstance *, pid_t);
462	int sh_setpgid(shinstance *, pid_t, pid_t);
463
464	/* tc* */
465	pid_t sh_tcgetpgrp(shinstance *, int);
466	int 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
493	int sh_getrlimit(shinstance , int, shrlimit );
494	int sh_setrlimit(shinstance , int, const shrlimit );
495
496	/* string.h */
497	const char sh_strerror(shinstance , int);
498
499	#ifdef DEBUG
500	# define TRACE2(param) trace param
501	# define TRACE2V(param) tracev param
502	#else
503	# define TRACE2(param) do { } while (0)
504	# define TRACE2V(param) do { } while (0)
505	#endif
506
507	#endif

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