source: trunk/src/kash/shinstance.h@ 1206

Last change on this file since 1206 was 1206, checked in by bird, 18 years ago

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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 <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
32#include "shtypes.h"
33#include "shthread.h"
34#include "shfile.h"
35#include "output.h"
36#include "options.h"
37
38#include "expand.h"
39#include "exec.h"
40#include "var.h"
41
42/* memalloc.c */
43#define MINSIZE 504 /* minimum size of a block */
44struct stack_block {
45 struct stack_block *prev;
46 char space[MINSIZE];
47};
48
49/* input.c */
50struct strpush {
51 struct strpush *prev; /* preceding string on stack */
52 char *prevstring;
53 int prevnleft;
54 int prevlleft;
55 struct alias *ap; /* if push was associated with an alias */
56};
57
58/*
59 * The parsefile structure pointed to by the global variable parsefile
60 * contains information about the current file being read.
61 */
62struct parsefile {
63 struct parsefile *prev; /* preceding file on stack */
64 int linno; /* current line */
65 int fd; /* file descriptor (or -1 if string) */
66 int nleft; /* number of chars left in this line */
67 int lleft; /* number of chars left in this buffer */
68 char *nextc; /* next char in buffer */
69 char *buf; /* input buffer */
70 struct strpush *strpush; /* for pushing strings at this level */
71 struct strpush basestrpush; /* so pushing one is fast */
72};
73
74/* exec.c */
75#define CMDTABLESIZE 31 /* should be prime */
76#define ARB 1 /* actual size determined at run time */
77
78struct tblentry {
79 struct tblentry *next; /* next entry in hash chain */
80 union param param; /* definition of builtin function */
81 short cmdtype; /* index identifying command */
82 char rehash; /* if set, cd done since entry created */
83 char cmdname[ARB]; /* name of command */
84};
85
86/* expand.c */
87/*
88 * Structure specifying which parts of the string should be searched
89 * for IFS characters.
90 */
91struct ifsregion {
92 struct ifsregion *next; /* next region in list */
93 int begoff; /* offset of start of region */
94 int endoff; /* offset of end of region */
95 int inquotes; /* search for nul bytes only */
96};
97
98
99/**
100 * A shell instance.
101 *
102 * This is the core structure of the shell, it contains all
103 * the data associated with a shell process except that it's
104 * running in a thread and not a separate process.
105 */
106typedef struct shinstance
107{
108 struct shinstance *next; /**< The next shell instance. */
109 struct shinstance *prev; /**< The previous shell instance. */
110 struct shinstance *parent; /**< The parent shell instance. */
111 pid_t pid; /**< The (fake) process id of this shell instance. */
112 shtid tid; /**< The thread identifier of the thread for this shell. */
113 shfdtab fdtab; /**< The file descriptor table. */
114
115 /* error.h */
116 struct jmploc *handler;
117 int exception;
118 int exerrno/* = 0 */; /**< Last exec error */
119 int volatile suppressint;
120 int volatile intpending;
121
122 /* main.h */
123 int rootpid; /**< pid of main shell. */
124 int rootshell; /**< true if we aren't a child of the main shell. */
125 struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
126
127 /* trap.h */
128 int pendingsigs;
129
130 /* parse.h */
131 int tokpushback;
132 int whichprompt; /**< 1 == PS1, 2 == PS2 */
133
134 /* output.h */
135 struct output output;
136 struct output errout;
137 struct output memout;
138 struct output *out1;
139 struct output *out2;
140 /* output.c */
141#define OUTBUFSIZ BUFSIZ
142#define MEM_OUT -3 /**< output to dynamically allocated memory */
143
144 /* options.h */
145 struct optent optlist[NOPTS];
146 char *minusc; /**< argument to -c option */
147 char *arg0; /**< $0 */
148 struct shparam shellparam; /**< $@ */
149 char **argptr; /**< argument list for builtin commands */
150 char *optionarg; /**< set by nextopt */
151 char *optptr; /**< used by nextopt */
152
153 /* var.h */
154 struct localvar *localvars;
155#if ATTY
156 struct var vatty;
157#endif
158 struct var vifs;
159 struct var vmail;
160 struct var vmpath;
161 struct var vpath;
162#ifdef _MSC_VER
163 struct var vpath2;
164#endif
165 struct var vps1;
166 struct var vps2;
167 struct var vps4;
168#ifndef SMALL
169 struct var vterm;
170 struct var vtermcap;
171 struct var vhistsize;
172#endif
173
174 /* myhistedit.h */
175 int displayhist;
176#ifndef SMALL
177 History *hist;
178 EditLine *el;
179#endif
180
181 /* memalloc.h */
182 char *stacknxt/* = stackbase.space*/;
183 int stacknleft/* = MINSIZE*/;
184 int sstrnleft;
185 int herefd/* = -1 */;
186
187 /* memalloc.c */
188 struct stack_block stackbase;
189 struct stack_block *stackp/* = &stackbase*/;
190 struct stackmark *markp;
191
192 /* jobs.h */
193 pid_t backgndpid; /**< pid of last background process */
194 int job_warning; /**< user was warned about stopped jobs */
195
196 /* input.h */
197 int plinno/* = 1 */;/**< input line number */
198 int parsenleft; /**< number of characters left in input buffer */
199 char *parsenextc; /**< next character in input buffer */
200 int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
201
202 /* input.c */
203 int parselleft; /**< copy of parsefile->lleft */
204 struct parsefile basepf; /**< top level input file */
205 char basebuf[BUFSIZ];/**< buffer for top level input file */
206 struct parsefile *parsefile/* = &basepf*/; /**< current input file */
207#ifndef SMALL
208 EditLine *el; /**< cookie for editline package */
209#endif
210
211
212 /* exec.h */
213 const char *pathopt; /**< set by padvance */
214
215 /* exec.c */
216 struct tblentry *cmdtable[CMDTABLESIZE];
217 int builtinloc/* = -1*/; /**< index in path of %builtin, or -1 */
218
219
220 /* eval.h */
221 char *commandname; /**< currently executing command */
222 int exitstatus; /**< exit status of last command */
223 int back_exitstatus;/**< exit status of backquoted command */
224 struct strlist *cmdenviron; /**< environment for builtin command */
225 int funcnest; /**< depth of function calls */
226 int evalskip; /**< set if we are skipping commands */
227 int skipcount; /**< number of levels to skip */
228 int loopnest; /**< current loop nesting level */
229
230 /* builtins.h */
231
232 /* alias.c */
233#define ATABSIZE 39
234 struct alias *atab[ATABSIZE];
235
236 /* cd.c */
237 char *curdir; /**< current working directory */
238 char *prevdir; /**< previous working directory */
239 char *cdcomppath;
240 int getpwd_first; /**< static in getpwd. (initialized to 1!) */
241
242 /* error.c */
243 char errmsg_buf[16]; /**< static in errmsg. (bss) */
244
245 /* eval.c */
246 int vforked;
247
248 /* expand.c */
249 char *expdest; /**< output of current string */
250 struct nodelist *argbackq; /**< list of back quote expressions */
251 struct ifsregion ifsfirst; /**< first struct in list of ifs regions */
252 struct ifsregion *ifslastp; /**< last struct in list */
253 struct arglist exparg; /**< holds expanded arg list */
254 char *expdir; /**< Used by expandmeta. */
255
256 /* mail.c */
257#define MAXMBOXES 10
258 int nmboxes; /**< number of mailboxes */
259 time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
260
261 /* bltin/test.c */
262 char **t_wp;
263 struct t_op const *t_wp_op;
264
265} shinstance;
266
267
268extern shinstance *sh_create_root_shell(shinstance *inherit, int argc, char **argv);
269char *sh_getenv(shinstance *, const char *);
270
271/* signals */
272#include <signal.h>
273#ifdef _MSC_VER
274 typedef uint32_t sh_sigset_t;
275#else
276 typedef sigset_t sh_sigset_t;
277#endif
278
279typedef void (*sh_handler)(int);
280sh_handler sh_signal(shinstance *, int, sh_handler handler);
281void sh_raise_sigint(shinstance *);
282void sh_sigemptyset(sh_sigset_t *set);
283int sh_sigprocmask(shinstance *, int op, sh_sigset_t const *new, sh_sigset_t *old);
284void sh_abort(shinstance *);
285
286/* times */
287#include <time.h>
288#ifdef _MSC_VER
289 typedef struct sh_tms
290 {
291 clock_t tms_utime;
292 clock_t tms_stime;
293 clock_t tms_cutime;
294 clock_t tms_cstime;
295 } sh_tms;
296#else
297# include <times.h>
298 typedef struct tms sh_tms;
299#endif
300clock_t sh_times(sh_tms *);
301int sh_sysconf_clk_tck(void);
302
303/* wait / process */
304#ifdef _MSC_VER
305# include <process.h>
306# define WNOHANG 1 /* Don't hang in wait. */
307# define WUNTRACED 2 /* Tell about stopped, untraced children. */
308# define WCONTINUED 4 /* Report a job control continued process. */
309# define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
310# define WCOREFLAG 0200
311# define _WSTATUS(x) (_W_INT(x) & 0177)
312# define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
313# define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
314# define WSTOPSIG(x) (_W_INT(x) >> 8)
315# define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
316# define WTERMSIG(x) (_WSTATUS(x))
317# define WIFEXITED(x) (_WSTATUS(x) == 0)
318# define WEXITSTATUS(x) (_W_INT(x) >> 8)
319# define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
320# define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
321# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
322# define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
323#else
324# include <sys/wait.h>
325#endif
326pid_t sh_waitpid(shinstance *, pid_t, int *, int);
327void sh__exit(shinstance *, int);
328int sh_execve(shinstance *, const char *, const char * const*, const char * const *);
329uid_t sh_getuid(shinstance *);
330uid_t sh_geteuid(shinstance *);
331gid_t sh_getgid(shinstance *);
332gid_t sh_getegid(shinstance *);
333
334#endif
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