source: trunk/src/kash/shinstance.h@ 1208

Last change on this file since 1208 was 1208, checked in by bird, 18 years ago

trap.c ++.
File size: 12.7 KB
Line 
1/* $Id: $ */
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
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 /* output.h */
141 struct output output;
142 struct output errout;
143 struct output memout;
144 struct output *out1;
145 struct output *out2;
146 /* output.c */
147#define OUTBUFSIZ BUFSIZ
148#define MEM_OUT -3 /**< output to dynamically allocated memory */
149
150 /* options.h */
151 struct optent optlist[NOPTS];
152 char *minusc; /**< argument to -c option */
153 char *arg0; /**< $0 */
154 struct shparam shellparam; /**< $@ */
155 char **argptr; /**< argument list for builtin commands */
156 char *optionarg; /**< set by nextopt */
157 char *optptr; /**< used by nextopt */
158
159 /* var.h */
160 struct localvar *localvars;
161#if ATTY
162 struct var vatty;
163#endif
164 struct var vifs;
165 struct var vmail;
166 struct var vmpath;
167 struct var vpath;
168#ifdef _MSC_VER
169 struct var vpath2;
170#endif
171 struct var vps1;
172 struct var vps2;
173 struct var vps4;
174#ifndef SMALL
175 struct var vterm;
176 struct var vtermcap;
177 struct var vhistsize;
178#endif
179
180 /* myhistedit.h */
181 int displayhist;
182#ifndef SMALL
183 History *hist;
184 EditLine *el;
185#endif
186
187 /* memalloc.h */
188 char *stacknxt/* = stackbase.space*/;
189 int stacknleft/* = MINSIZE*/;
190 int sstrnleft;
191 int herefd/* = -1 */;
192
193 /* memalloc.c */
194 struct stack_block stackbase;
195 struct stack_block *stackp/* = &stackbase*/;
196 struct stackmark *markp;
197
198 /* jobs.h */
199 pid_t backgndpid/* = -1 */; /**< pid of last background process */
200 int job_warning; /**< user was warned about stopped jobs */
201
202 /* jobs.c */
203 struct job *jobtab; /**< array of jobs */
204 int njobs; /**< size of array */
205 int jobs_invalid; /**< set in child */
206#if JOBS
207 int initialpgrp; /**< pgrp of shell on invocation */
208 int curjob/* = -1*/;/**< current job */
209#endif
210 int ttyfd/* = -1*/;
211 int jobctl; /**< job control enabled / disabled */
212 char *cmdnextc;
213 int cmdnleft;
214
215 /* input.h */
216 int plinno/* = 1 */;/**< input line number */
217 int parsenleft; /**< number of characters left in input buffer */
218 char *parsenextc; /**< next character in input buffer */
219 int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
220
221 /* input.c */
222 int parselleft; /**< copy of parsefile->lleft */
223 struct parsefile basepf; /**< top level input file */
224 char basebuf[BUFSIZ];/**< buffer for top level input file */
225 struct parsefile *parsefile/* = &basepf*/; /**< current input file */
226#ifndef SMALL
227 EditLine *el; /**< cookie for editline package */
228#endif
229
230
231 /* exec.h */
232 const char *pathopt; /**< set by padvance */
233
234 /* exec.c */
235 struct tblentry *cmdtable[CMDTABLESIZE];
236 int builtinloc/* = -1*/; /**< index in path of %builtin, or -1 */
237
238
239 /* eval.h */
240 char *commandname; /**< currently executing command */
241 int exitstatus; /**< exit status of last command */
242 int back_exitstatus;/**< exit status of backquoted command */
243 struct strlist *cmdenviron; /**< environment for builtin command */
244 int funcnest; /**< depth of function calls */
245 int evalskip; /**< set if we are skipping commands */
246 int skipcount; /**< number of levels to skip */
247 int loopnest; /**< current loop nesting level */
248
249 /* builtins.h */
250
251 /* alias.c */
252#define ATABSIZE 39
253 struct alias *atab[ATABSIZE];
254
255 /* cd.c */
256 char *curdir; /**< current working directory */
257 char *prevdir; /**< previous working directory */
258 char *cdcomppath;
259 int getpwd_first; /**< static in getpwd. (initialized to 1!) */
260
261 /* error.c */
262 char errmsg_buf[16]; /**< static in errmsg. (bss) */
263
264 /* eval.c */
265 int vforked;
266
267 /* expand.c */
268 char *expdest; /**< output of current string */
269 struct nodelist *argbackq; /**< list of back quote expressions */
270 struct ifsregion ifsfirst; /**< first struct in list of ifs regions */
271 struct ifsregion *ifslastp; /**< last struct in list */
272 struct arglist exparg; /**< holds expanded arg list */
273 char *expdir; /**< Used by expandmeta. */
274
275 /* mail.c */
276#define MAXMBOXES 10
277 int nmboxes; /**< number of mailboxes */
278 time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
279
280 /* bltin/test.c */
281 char **t_wp;
282 struct t_op const *t_wp_op;
283
284} shinstance;
285
286
287extern shinstance *sh_create_root_shell(shinstance *, int, char **);
288char *sh_getenv(shinstance *, const char *);
289
290/* signals */
291typedef void (*sh_sig_t)(shinstance *, int);
292#ifdef _MSC_VER
293 typedef uint32_t sh_sigset_t;
294#else
295 typedef sigset_t sh_sigset_t;
296#endif
297struct sh_sigaction
298{
299 sh_sig_t sh_handler;
300 sh_sigset_t sh_mask;
301 int sh_flags;
302};
303#define SH_SIG_DFL ((sh_sig_t)SIG_DFL)
304#define SH_SIG_IGN ((sh_sig_t)SIG_IGN)
305
306int sh_sigaction(int, const struct sh_sigaction *, struct sh_sigaction *);
307sh_sig_t sh_signal(shinstance *, int, sh_sig_t);
308void sh_raise_sigint(shinstance *);
309void sh_sigemptyset(sh_sigset_t *);
310int sh_sigprocmask(shinstance *, int, sh_sigset_t const *, sh_sigset_t *);
311void sh_abort(shinstance *);
312
313/* times */
314#include <time.h>
315#ifdef _MSC_VER
316 typedef struct sh_tms
317 {
318 clock_t tms_utime;
319 clock_t tms_stime;
320 clock_t tms_cutime;
321 clock_t tms_cstime;
322 } sh_tms;
323#else
324# include <times.h>
325 typedef struct tms sh_tms;
326#endif
327clock_t sh_times(sh_tms *);
328int sh_sysconf_clk_tck(void);
329
330/* wait / process */
331#ifdef _MSC_VER
332# include <process.h>
333# define WNOHANG 1 /* Don't hang in wait. */
334# define WUNTRACED 2 /* Tell about stopped, untraced children. */
335# define WCONTINUED 4 /* Report a job control continued process. */
336# define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
337# define WCOREFLAG 0200
338# define _WSTATUS(x) (_W_INT(x) & 0177)
339# define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
340# define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
341# define WSTOPSIG(x) (_W_INT(x) >> 8)
342# define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
343# define WTERMSIG(x) (_WSTATUS(x))
344# define WIFEXITED(x) (_WSTATUS(x) == 0)
345# define WEXITSTATUS(x) (_W_INT(x) >> 8)
346# define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
347# define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
348# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
349# define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
350#else
351# include <sys/wait.h>
352#endif
353pid_t sh_waitpid(shinstance *, pid_t, int *, int);
354void sh__exit(shinstance *, int);
355int sh_execve(shinstance *, const char *, const char * const*, const char * const *);
356uid_t sh_getuid(shinstance *);
357uid_t sh_geteuid(shinstance *);
358gid_t sh_getgid(shinstance *);
359gid_t sh_getegid(shinstance *);
360pid_t sh_getpid(shinstance *);
361pid_t sh_getpgrp(shinstance *);
362pid_t sh_getpgid(shinstance *, pid_t);
363int sh_setpgid(shinstance *, pid_t, pid_t);
364int sh_killpg(shinstance *, pid_t, int);
365
366/* tc* */
367pid_t sh_tcgetpgrp(shinstance *, int);
368int sh_tcsetpgrp(shinstance *, int, pid_t);
369
370#endif
Note: See TracBrowser for help on using the repository browser.