source: trunk/src/kash/shinstance.h@ 1505

Last change on this file since 1505 was 1240, checked in by bird, 18 years ago

shfile_cloexec. signal types.
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1/* $Id: shinstance.h 1240 2007-10-10 02:32:54Z 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 "output.h"
46#include "options.h"
47
48#include "expand.h"
49#include "exec.h"
50#include "var.h"
51
52#ifdef _MSC_VER
53# define strcasecmp stricmp
54# define strncasecmp strnicmp
55#endif
56
57
58/* memalloc.c */
59#define MINSIZE 504 /* minimum size of a block */
60struct stack_block {
61 struct stack_block *prev;
62 char space[MINSIZE];
63};
64
65/* input.c */
66struct strpush {
67 struct strpush *prev; /* preceding string on stack */
68 char *prevstring;
69 int prevnleft;
70 int prevlleft;
71 struct alias *ap; /* if push was associated with an alias */
72};
73
74/*
75 * The parsefile structure pointed to by the global variable parsefile
76 * contains information about the current file being read.
77 */
78struct parsefile {
79 struct parsefile *prev; /* preceding file on stack */
80 int linno; /* current line */
81 int fd; /* file descriptor (or -1 if string) */
82 int nleft; /* number of chars left in this line */
83 int lleft; /* number of chars left in this buffer */
84 char *nextc; /* next char in buffer */
85 char *buf; /* input buffer */
86 struct strpush *strpush; /* for pushing strings at this level */
87 struct strpush basestrpush; /* so pushing one is fast */
88};
89
90/* exec.c */
91#define CMDTABLESIZE 31 /* should be prime */
92#define ARB 1 /* actual size determined at run time */
93
94struct tblentry {
95 struct tblentry *next; /* next entry in hash chain */
96 union param param; /* definition of builtin function */
97 short cmdtype; /* index identifying command */
98 char rehash; /* if set, cd done since entry created */
99 char cmdname[ARB]; /* name of command */
100};
101
102/* expand.c */
103/*
104 * Structure specifying which parts of the string should be searched
105 * for IFS characters.
106 */
107struct ifsregion {
108 struct ifsregion *next; /* next region in list */
109 int begoff; /* offset of start of region */
110 int endoff; /* offset of end of region */
111 int inquotes; /* search for nul bytes only */
112};
113
114
115/**
116 * A shell instance.
117 *
118 * This is the core structure of the shell, it contains all
119 * the data associated with a shell process except that it's
120 * running in a thread and not a separate process.
121 */
122struct shinstance
123{
124 struct shinstance *next; /**< The next shell instance. */
125 struct shinstance *prev; /**< The previous shell instance. */
126 struct shinstance *parent; /**< The parent shell instance. */
127 pid_t pid; /**< The (fake) process id of this shell instance. */
128 shtid tid; /**< The thread identifier of the thread for this shell. */
129 shfdtab fdtab; /**< The file descriptor table. */
130
131 /* alias.c */
132#define ATABSIZE 39
133 struct alias *atab[ATABSIZE];
134
135 /* cd.c */
136 char *curdir; /**< current working directory */
137 char *prevdir; /**< previous working directory */
138 char *cdcomppath;
139 int getpwd_first; /**< static in getpwd. (initialized to 1!) */
140
141 /* error.h */
142 struct jmploc *handler;
143 int exception;
144 int exerrno/* = 0 */; /**< Last exec error */
145 int volatile suppressint;
146 int volatile intpending;
147
148 /* error.c */
149 char errmsg_buf[16]; /**< static in errmsg. (bss) */
150
151 /* eval.h */
152 char *commandname; /**< currently executing command */
153 int exitstatus; /**< exit status of last command */
154 int back_exitstatus;/**< exit status of backquoted command */
155 struct strlist *cmdenviron; /**< environment for builtin command */
156 int funcnest; /**< depth of function calls */
157 int evalskip; /**< set if we are skipping commands */
158 int skipcount; /**< number of levels to skip */
159 int loopnest; /**< current loop nesting level */
160
161 /* eval.c */
162 int vforked;
163
164 /* expand.c */
165 char *expdest; /**< output of current string */
166 struct nodelist *argbackq; /**< list of back quote expressions */
167 struct ifsregion ifsfirst; /**< first struct in list of ifs regions */
168 struct ifsregion *ifslastp; /**< last struct in list */
169 struct arglist exparg; /**< holds expanded arg list */
170 char *expdir; /**< Used by expandmeta. */
171
172 /* exec.h */
173 const char *pathopt; /**< set by padvance */
174
175 /* exec.c */
176 struct tblentry *cmdtable[CMDTABLESIZE];
177 int builtinloc/* = -1*/; /**< index in path of %builtin, or -1 */
178
179 /* input.h */
180 int plinno/* = 1 */;/**< input line number */
181 int parsenleft; /**< number of characters left in input buffer */
182 char *parsenextc; /**< next character in input buffer */
183 int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
184
185 /* input.c */
186 int parselleft; /**< copy of parsefile->lleft */
187 struct parsefile basepf; /**< top level input file */
188 char basebuf[BUFSIZ];/**< buffer for top level input file */
189 struct parsefile *parsefile/* = &basepf*/; /**< current input file */
190#ifndef SMALL
191 EditLine *el; /**< cookie for editline package */
192#endif
193
194 /* jobs.h */
195 pid_t backgndpid/* = -1 */; /**< pid of last background process */
196 int job_warning; /**< user was warned about stopped jobs */
197
198 /* jobs.c */
199 struct job *jobtab; /**< array of jobs */
200 int njobs; /**< size of array */
201 int jobs_invalid; /**< set in child */
202 int initialpgrp; /**< pgrp of shell on invocation */
203 int curjob/* = -1*/;/**< current job */
204 int ttyfd/* = -1*/;
205 int jobctl; /**< job control enabled / disabled */
206 char *cmdnextc;
207 int cmdnleft;
208
209
210 /* mail.c */
211#define MAXMBOXES 10
212 int nmboxes; /**< number of mailboxes */
213 time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
214
215 /* main.h */
216 int rootpid; /**< pid of main shell. */
217 int rootshell; /**< true if we aren't a child of the main shell. */
218 struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
219
220 /* memalloc.h */
221 char *stacknxt/* = stackbase.space*/;
222 int stacknleft/* = MINSIZE*/;
223 int sstrnleft;
224 int herefd/* = -1 */;
225
226 /* memalloc.c */
227 struct stack_block stackbase;
228 struct stack_block *stackp/* = &stackbase*/;
229 struct stackmark *markp;
230
231 /* myhistedit.h */
232 int displayhist;
233#ifndef SMALL
234 History *hist;
235 EditLine *el;
236#endif
237
238 /* output.h */
239 struct output output;
240 struct output errout;
241 struct output memout;
242 struct output *out1;
243 struct output *out2;
244
245 /* output.c */
246#define OUTBUFSIZ BUFSIZ
247#define MEM_OUT -3 /**< output to dynamically allocated memory */
248
249 /* options.h */
250 struct optent optlist[NOPTS];
251 char *minusc; /**< argument to -c option */
252 char *arg0; /**< $0 */
253 struct shparam shellparam; /**< $@ */
254 char **argptr; /**< argument list for builtin commands */
255 char *optionarg; /**< set by nextopt */
256 char *optptr; /**< used by nextopt */
257
258 /* parse.h */
259 int tokpushback;
260 int whichprompt; /**< 1 == PS1, 2 == PS2 */
261
262 /* parser.c */
263 int noalias/* = 0*/;/**< when set, don't handle aliases */
264 struct heredoc *heredoclist; /**< list of here documents to read */
265 int parsebackquote; /**< nonzero if we are inside backquotes */
266 int doprompt; /**< if set, prompt the user */
267 int needprompt; /**< true if interactive and at start of line */
268 int lasttoken; /**< last token read */
269 char *wordtext; /**< text of last word returned by readtoken */
270 int checkkwd; /**< 1 == check for kwds, 2 == also eat newlines */
271 struct nodelist *backquotelist;
272 union node *redirnode;
273 struct heredoc *heredoc;
274 int quoteflag; /**< set if (part of) last token was quoted */
275 int startlinno; /**< line # where last token started */
276
277 /* redir.c */
278 struct redirtab *redirlist;
279 int fd0_redirected/* = 0*/;
280
281 /* trap.h */
282 int pendingsigs; /**< indicates some signal received */
283
284 /* trap.c */
285 char gotsig[NSIG]; /**< indicates specified signal received */
286 char *trap[NSIG+1]; /**< trap handler commands */
287 char sigmode[NSIG]; /**< current value of signal */
288
289 /* var.h */
290 struct localvar *localvars;
291 struct var vatty;
292 struct var vifs;
293 struct var vmail;
294 struct var vmpath;
295 struct var vpath;
296#ifdef _MSC_VER
297 struct var vpath2;
298#endif
299 struct var vps1;
300 struct var vps2;
301 struct var vps4;
302#ifndef SMALL
303 struct var vterm;
304 struct var vhistsize;
305#endif
306 struct var voptind;
307#ifdef PC_OS2_LIBPATHS
308 struct var libpath_vars[4];
309#endif
310#ifdef SMALL
311# define VTABSIZE 39
312#else
313# define VTABSIZE 517
314#endif
315 struct var *vartab[VTABSIZE];
316
317 /* builtins.h */
318
319 /* bltin/test.c */
320 char **t_wp;
321 struct t_op const *t_wp_op;
322
323};
324
325
326extern shinstance *sh_create_root_shell(shinstance *, int, char **);
327
328/* environment & pwd.h */
329char *sh_getenv(shinstance *, const char *);
330char **sh_environ(shinstance *);
331const char *sh_gethomedir(shinstance *, const char *);
332
333/* signals */
334typedef void (*shsig_t)(shinstance *, int);
335#ifdef _MSC_VER
336 typedef uint32_t shsigset_t;
337#else
338 typedef sigset_t shsigset_t;
339#endif
340struct shsigaction
341{
342 shsig_t sh_handler;
343 shsigset_t sh_mask;
344 int sh_flags;
345};
346#define SH_SIG_DFL ((shsig_t)SIG_DFL)
347#define SH_SIG_IGN ((shsig_t)SIG_IGN)
348#ifdef _MSC_VER
349# define SIG_BLOCK 1
350# define SIG_UNBLOCK 2
351# define SIG_SETMASK 3
352# define SIGHUP 5
353# define SIGQUIT 9
354# define SIGPIPE 12
355# define SIGTTOU 17
356# define SIGTSTP 18
357# define SIGTTIN 19
358# define SIGCONT 20
359# define sys_siglist sys_signame
360#endif /* _MSC_VER */
361#ifdef __sun__
362# define sys_siglist _sys_siglist
363#endif
364#ifndef HAVE_SYS_SIGNAME
365extern char sys_signame[NSIG][16];
366#endif
367
368int sh_sigaction(shinstance *, int, const struct shsigaction *, struct shsigaction *);
369shsig_t sh_signal(shinstance *, int, shsig_t);
370int sh_siginterrupt(shinstance *, int, int);
371void sh_sigemptyset(shsigset_t *);
372int sh_sigprocmask(shinstance *, int, shsigset_t const *, shsigset_t *);
373void sh_abort(shinstance *) __attribute__((__noreturn__));
374void sh_raise_sigint(shinstance *);
375int sh_kill(shinstance *, pid_t, int);
376int sh_killpg(shinstance *, pid_t, int);
377
378/* times */
379#include <time.h>
380#ifdef _MSC_VER
381 typedef struct shtms
382 {
383 clock_t tms_utime;
384 clock_t tms_stime;
385 clock_t tms_cutime;
386 clock_t tms_cstime;
387 } shtms;
388#else
389# include <sys/times.h>
390 typedef struct tms shtms;
391#endif
392clock_t sh_times(shinstance *, shtms *);
393int sh_sysconf_clk_tck(void);
394
395/* wait / process */
396#ifdef _MSC_VER
397# include <process.h>
398# define WNOHANG 1 /* Don't hang in wait. */
399# define WUNTRACED 2 /* Tell about stopped, untraced children. */
400# define WCONTINUED 4 /* Report a job control continued process. */
401# define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
402# define WCOREFLAG 0200
403# define _WSTATUS(x) (_W_INT(x) & 0177)
404# define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
405# define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
406# define WSTOPSIG(x) (_W_INT(x) >> 8)
407# define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
408# define WTERMSIG(x) (_WSTATUS(x))
409# define WIFEXITED(x) (_WSTATUS(x) == 0)
410# define WEXITSTATUS(x) (_W_INT(x) >> 8)
411# define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
412# define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
413# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
414# define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
415#else
416# include <sys/wait.h>
417#endif
418pid_t sh_fork(shinstance *);
419pid_t sh_waitpid(shinstance *, pid_t, int *, int);
420void sh__exit(shinstance *, int) __attribute__((__noreturn__));;
421int sh_execve(shinstance *, const char *, const char * const*, const char * const *);
422uid_t sh_getuid(shinstance *);
423uid_t sh_geteuid(shinstance *);
424gid_t sh_getgid(shinstance *);
425gid_t sh_getegid(shinstance *);
426pid_t sh_getpid(shinstance *);
427pid_t sh_getpgrp(shinstance *);
428pid_t sh_getpgid(shinstance *, pid_t);
429int sh_setpgid(shinstance *, pid_t, pid_t);
430
431/* tc* */
432pid_t sh_tcgetpgrp(shinstance *, int);
433int sh_tcsetpgrp(shinstance *, int, pid_t);
434
435/* sys/resource.h */
436#ifdef _MSC_VER
437 typedef int64_t shrlim_t;
438 typedef struct shrlimit
439 {
440 shrlim_t rlim_cur;
441 shrlim_t rlim_max;
442 } shrlimit;
443# define RLIMIT_CPU 0
444# define RLIMIT_FSIZE 1
445# define RLIMIT_DATA 2
446# define RLIMIT_STACK 3
447# define RLIMIT_CORE 4
448# define RLIMIT_RSS 5
449# define RLIMIT_MEMLOCK 6
450# define RLIMIT_NPROC 7
451# define RLIMIT_NOFILE 8
452# define RLIMIT_SBSIZE 9
453# define RLIMIT_VMEM 10
454# define RLIM_NLIMITS 11
455# define RLIM_INFINITY (0x7fffffffffffffffLL)
456#else
457 typedef rlim_t shrlim_t;
458 typedef struct rlimit shrlimit;
459#endif
460int sh_getrlimit(shinstance *, int, shrlimit *);
461int sh_setrlimit(shinstance *, int, const shrlimit *);
462
463#endif
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