| 1 | /* $Id: $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * The shell instance and it's methods.
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| 5 | *
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| 6 | * Copyright (c) 2007 knut st. osmundsen <[email protected]>
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| 7 | *
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| 8 | *
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| 9 | * This file is part of kBuild.
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| 10 | *
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| 11 | * kBuild is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * kBuild is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with kBuild; if not, write to the Free Software
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| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 24 | *
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| 25 | */
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| 26 |
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| 27 | #ifndef ___shinstance_h___
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| 28 | #define ___shinstance_h___
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| 29 |
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| 30 | #include <stdio.h> /* BUFSIZ */
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| 31 |
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| 32 | #include "shtypes.h"
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| 33 | #include "shthread.h"
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| 34 | #include "shfile.h"
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| 35 | #include "output.h"
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| 36 | #include "options.h"
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| 37 |
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| 38 | #include "var.h"
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| 39 |
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| 40 | /* memalloc.c */
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| 41 | #define MINSIZE 504 /* minimum size of a block */
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| 42 | struct stack_block {
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| 43 | struct stack_block *prev;
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| 44 | char space[MINSIZE];
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| 45 | };
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| 46 |
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| 47 | /* input.c */
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| 48 | struct strpush {
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| 49 | struct strpush *prev; /* preceding string on stack */
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| 50 | char *prevstring;
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| 51 | int prevnleft;
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| 52 | int prevlleft;
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| 53 | struct alias *ap; /* if push was associated with an alias */
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| 54 | };
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| 55 |
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| 56 | /*
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| 57 | * The parsefile structure pointed to by the global variable parsefile
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| 58 | * contains information about the current file being read.
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| 59 | */
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| 60 | struct parsefile {
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| 61 | struct parsefile *prev; /* preceding file on stack */
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| 62 | int linno; /* current line */
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| 63 | int fd; /* file descriptor (or -1 if string) */
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| 64 | int nleft; /* number of chars left in this line */
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| 65 | int lleft; /* number of chars left in this buffer */
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| 66 | char *nextc; /* next char in buffer */
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| 67 | char *buf; /* input buffer */
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| 68 | struct strpush *strpush; /* for pushing strings at this level */
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| 69 | struct strpush basestrpush; /* so pushing one is fast */
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| 70 | };
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| 71 |
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| 72 |
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| 73 |
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| 74 | /**
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| 75 | * A shell instance.
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| 76 | *
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| 77 | * This is the core structure of the shell, it contains all
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| 78 | * the data associated with a shell process except that it's
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| 79 | * running in a thread and not a separate process.
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| 80 | */
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| 81 | typedef struct shinstance
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| 82 | {
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| 83 | struct shinstance *next; /**< The next shell instance. */
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| 84 | struct shinstance *prev; /**< The previous shell instance. */
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| 85 | struct shinstance *parent; /**< The parent shell instance. */
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| 86 | pid_t pid; /**< The (fake) process id of this shell instance. */
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| 87 | shtid tid; /**< The thread identifier of the thread for this shell. */
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| 88 | shfdtab fdtab; /**< The file descriptor table. */
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| 89 |
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| 90 | /* error.h */
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| 91 | struct jmploc *handler;
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| 92 | int exception;
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| 93 | int exerrno;
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| 94 | int volatile suppressint;
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| 95 | int volatile intpending;
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| 96 |
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| 97 | /* main.h */
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| 98 | int rootpid; /**< pid of main shell. */
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| 99 | int rootshell; /**< true if we aren't a child of the main shell. */
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| 100 | struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
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| 101 |
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| 102 | /* trap.h */
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| 103 | int pendingsigs;
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| 104 |
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| 105 | /* parse.h */
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| 106 | int tokpushback;
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| 107 | int whichprompt; /**< 1 == PS1, 2 == PS2 */
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| 108 |
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| 109 | /* output.h */
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| 110 | struct output output;
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| 111 | struct output errout;
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| 112 | struct output memout;
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| 113 | struct output *out1;
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| 114 | struct output *out2;
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| 115 | /* output.c */
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| 116 | #define OUTBUFSIZ BUFSIZ
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| 117 | #define MEM_OUT -3 /**< output to dynamically allocated memory */
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| 118 |
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| 119 | /* options.h */
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| 120 | struct optent optlist[NOPTS];
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| 121 | char *minusc; /**< argument to -c option */
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| 122 | char *arg0; /**< $0 */
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| 123 | struct shparam shellparam; /**< $@ */
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| 124 | char **argptr; /**< argument list for builtin commands */
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| 125 | char *optionarg; /**< set by nextopt */
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| 126 | char *optptr; /**< used by nextopt */
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| 127 |
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| 128 | /* var.h */
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| 129 | struct localvar *localvars;
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| 130 | #if ATTY
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| 131 | struct var vatty;
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| 132 | #endif
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| 133 | struct var vifs;
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| 134 | struct var vmail;
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| 135 | struct var vmpath;
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| 136 | struct var vpath;
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| 137 | #ifdef _MSC_VER
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| 138 | struct var vpath2;
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| 139 | #endif
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| 140 | struct var vps1;
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| 141 | struct var vps2;
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| 142 | struct var vps4;
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| 143 | #ifndef SMALL
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| 144 | struct var vterm;
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| 145 | struct var vtermcap;
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| 146 | struct var vhistsize;
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| 147 | #endif
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| 148 |
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| 149 | /* myhistedit.h */
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| 150 | int displayhist;
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| 151 | #ifndef SMALL
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| 152 | History *hist;
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| 153 | EditLine *el;
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| 154 | #endif
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| 155 |
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| 156 | /* memalloc.h */
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| 157 | char *stacknxt/* = stackbase.space*/;
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| 158 | int stacknleft/* = MINSIZE*/;
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| 159 | int sstrnleft;
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| 160 | int herefd/* = -1 */;
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| 161 |
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| 162 | /* memalloc.c */
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| 163 | struct stack_block stackbase;
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| 164 | struct stack_block *stackp/* = &stackbase*/;
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| 165 | struct stackmark *markp;
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| 166 |
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| 167 | /* jobs.h */
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| 168 | pid_t backgndpid; /**< pid of last background process */
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| 169 | int job_warning; /**< user was warned about stopped jobs */
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| 170 |
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| 171 | /* input.h */
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| 172 | int plinno/* = 1 */;/**< input line number */
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| 173 | int parsenleft; /**< number of characters left in input buffer */
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| 174 | char *parsenextc; /**< next character in input buffer */
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| 175 | int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
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| 176 |
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| 177 | /* input.c */
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| 178 | int parselleft; /**< copy of parsefile->lleft */
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| 179 | struct parsefile basepf; /**< top level input file */
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| 180 | char basebuf[BUFSIZ];/**< buffer for top level input file */
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| 181 | struct parsefile *parsefile/* = &basepf*/; /**< current input file */
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| 182 | #ifndef SMALL
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| 183 | EditLine *el; /**< cookie for editline package */
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| 184 | #endif
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| 185 |
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| 186 |
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| 187 | /* exec.h */
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| 188 | const char *pathopt; /**< set by padvance */
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| 189 |
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| 190 | /* eval.h */
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| 191 | char *commandname; /**< currently executing command */
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| 192 | int exitstatus; /**< exit status of last command */
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| 193 | int back_exitstatus;/**< exit status of backquoted command */
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| 194 | struct strlist *cmdenviron; /**< environment for builtin command */
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| 195 | int funcnest; /**< depth of function calls */
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| 196 | int evalskip; /**< set if we are skipping commands */
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| 197 | int skipcount; /**< number of levels to skip */
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| 198 | int loopnest; /**< current loop nesting level */
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| 199 |
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| 200 | /* builtins.h */
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| 201 |
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| 202 | /* alias.c */
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| 203 | #define ATABSIZE 39
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| 204 | struct alias *atab[ATABSIZE];
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| 205 |
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| 206 | /* cd.c */
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| 207 | char *curdir; /**< current working directory */
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| 208 | char *prevdir; /**< previous working directory */
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| 209 | char *cdcomppath;
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| 210 | int getpwd_first; /**< static in getpwd. (initialized to 1!) */
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| 211 |
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| 212 | /* error.c */
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| 213 | char errmsg_buf[16]; /**< static in errmsg. (bss) */
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| 214 |
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| 215 | /* eval.c */
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| 216 | int vforked;
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| 217 |
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| 218 | /* mail.c */
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| 219 | #define MAXMBOXES 10
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| 220 | int nmboxes; /**< number of mailboxes */
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| 221 | time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
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| 222 |
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| 223 | } shinstance;
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| 224 |
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| 225 |
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| 226 | extern shinstance *sh_create_root_shell(shinstance *inherit, int argc, char **argv);
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| 227 | char *sh_getenv(shinstance *, const char *);
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| 228 |
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| 229 | /* signals */
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| 230 | #include <signal.h>
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| 231 | #ifdef _MSC_VER
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| 232 | typedef uint32_t sh_sigset_t;
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| 233 | #else
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| 234 | typedef sigset_t sh_sigset_t;
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| 235 | #endif
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| 236 |
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| 237 | typedef void (*sh_handler)(int);
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| 238 | sh_handler sh_signal(shinstance *, int, sh_handler handler);
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| 239 | void sh_raise_sigint(shinstance *);
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| 240 | void sh_sigemptyset(sh_sigset_t *set);
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| 241 | int sh_sigprocmask(shinstance *, int op, sh_sigset_t const *new, sh_sigset_t *old);
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| 242 | void sh_abort(shinstance *);
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| 243 |
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| 244 | /* times */
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| 245 | #include <time.h>
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| 246 | #ifdef _MSC_VER
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| 247 | typedef struct sh_tms
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| 248 | {
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| 249 | clock_t tms_utime;
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| 250 | clock_t tms_stime;
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| 251 | clock_t tms_cutime;
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| 252 | clock_t tms_cstime;
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| 253 | } sh_tms;
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| 254 | #else
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| 255 | # include <times.h>
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| 256 | typedef struct tms sh_tms;
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| 257 | #endif
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| 258 | clock_t sh_times(sh_tms *);
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| 259 | int sh_sysconf_clk_tck(void);
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| 260 |
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| 261 | /* wait */
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| 262 | #ifdef _MSC_VER
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| 263 | # include <process.h>
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| 264 | # define WNOHANG 1 /* Don't hang in wait. */
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| 265 | # define WUNTRACED 2 /* Tell about stopped, untraced children. */
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| 266 | # define WCONTINUED 4 /* Report a job control continued process. */
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| 267 | # define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
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| 268 | # define WCOREFLAG 0200
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| 269 | # define _WSTATUS(x) (_W_INT(x) & 0177)
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| 270 | # define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
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| 271 | # define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
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| 272 | # define WSTOPSIG(x) (_W_INT(x) >> 8)
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| 273 | # define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
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| 274 | # define WTERMSIG(x) (_WSTATUS(x))
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| 275 | # define WIFEXITED(x) (_WSTATUS(x) == 0)
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| 276 | # define WEXITSTATUS(x) (_W_INT(x) >> 8)
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| 277 | # define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
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| 278 | # define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
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| 279 | # define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
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| 280 | # define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
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| 281 | #else
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| 282 | # include <sys/wait.h>
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| 283 | #endif
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| 284 | pid_t sh_waitpid(shinstance *, pid_t, int *, int);
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| 285 | void sh__exit(shinstance *, int);
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| 286 |
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| 287 |
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| 288 | #endif
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