| 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 <bird-src-spam@anduin.net>
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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 | #include "shtypes.h"
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| 28 | #include "shthread.h"
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| 29 |
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| 30 | /**
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| 31 | * One file.
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| 32 | */
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| 33 | typedef struct shfile
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| 34 | {
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| 35 | int fd; /**< The shell file descriptor number. */
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| 36 | int flags; /**< Open flags. */
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| 37 | intptr_t native; /**< The native file descriptor number. */
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| 38 | } shfile;
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| 39 |
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| 40 | /**
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| 41 | * The file descriptor table for a shell.
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| 42 | */
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| 43 | typedef struct shfdtab
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| 44 | {
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| 45 | shmtx mtx; /**< Mutex protecting any operations on the table and it's handles. */
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| 46 | unsigned size; /**< The size of the table (number of entries). */
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| 47 | shfile *tab; /**< Pointer to the table. */
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| 48 | } shfdtab;
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| 49 |
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| 50 | /**
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| 51 | * A shell instance.
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| 52 | *
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| 53 | * This is the core structure of the shell, it contains all
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| 54 | * the data associated with a shell process except that it's
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| 55 | * running in a thread and not a separate process.
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| 56 | */
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| 57 | typedef struct shinstance
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| 58 | {
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| 59 | struct shinstance *next; /**< The next shell instance. */
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| 60 | struct shinstance *prev; /**< The previous shell instance. */
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| 61 | struct shinstance *parent; /**< The parent shell instance. */
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| 62 | pid_t pid; /**< The (fake) process id of this shell instance. */
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| 63 | shtid tid; /**< The thread identifier of the thread for this shell. */
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| 64 | shfdtab fdtab; /**< The file descriptor table. */
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| 65 |
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| 66 | /* error.h */
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| 67 | struct jmploc *handler;
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| 68 | int exception;
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| 69 | int exerrno;
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| 70 | int volatile suppressint;
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| 71 | int volatile intpending;
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| 72 |
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| 73 | /* main.h */
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| 74 | int rootpid; /**< pid of main shell. */
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| 75 | int rootshell; /**< true if we aren't a child of the main shell. */
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| 76 | struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
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| 77 |
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| 78 | /* trap.h */
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| 79 | int pendingsigs;
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| 80 |
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| 81 | /* parse.h */
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| 82 | int tokpushback;
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| 83 | int whichprompt; /**< 1 == PS1, 2 == PS2 */
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| 84 |
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| 85 | /* output.h */
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| 86 | struct output output;
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| 87 | struct output errout;
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| 88 | struct output memout;
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| 89 | struct output *out1;
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| 90 | struct output *out2;
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| 91 |
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| 92 | /* options.h */
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| 93 | struct optent optlist[NOPTS];
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| 94 | char *minusc; /**< argument to -c option */
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| 95 | char *arg0; /**< $0 */
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| 96 | struct shparam shellparam; /**< $@ */
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| 97 | char **argptr; /**< argument list for builtin commands */
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| 98 | char *optionarg; /**< set by nextopt */
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| 99 | char *optptr; /**< used by nextopt */
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| 100 |
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| 101 | /* var.h */
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| 102 | struct localvar *localvars;
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| 103 | #if ATTY
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| 104 | struct var vatty;
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| 105 | #endif
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| 106 | struct var vifs;
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| 107 | struct var vmail;
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| 108 | struct var vmpath;
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| 109 | struct var vpath;
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| 110 | #ifdef _MSC_VER
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| 111 | struct var vpath2;
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| 112 | #endif
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| 113 | struct var vps1;
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| 114 | struct var vps2;
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| 115 | struct var vps4;
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| 116 | #ifndef SMALL
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| 117 | struct var vterm;
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| 118 | struct var vtermcap;
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| 119 | struct var vhistsize;
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| 120 | #endif
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| 121 |
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| 122 | /* myhistedit.h */
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| 123 | int displayhist;
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| 124 | #ifndef SMALL
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| 125 | History *hist;
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| 126 | EditLine *el;
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| 127 | #endif
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| 128 |
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| 129 | /* memalloc.h */
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| 130 | char *stacknxt;
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| 131 | int stacknleft;
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| 132 | int sstrnleft;
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| 133 | int herefd;
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| 134 |
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| 135 | /* jobs.h */
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| 136 | pid_t backgndpid; /**< pid of last background process */
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| 137 | int job_warning; /**< user was warned about stopped jobs */
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| 138 |
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| 139 | /* input.h */
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| 140 | int plinno;
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| 141 | int parsenleft; /**< number of characters left in input buffer */
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| 142 | char *parsenextc; /**< next character in input buffer */
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| 143 | int init_editline; /**< 0 == not setup, 1 == OK, -1 == failed */
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| 144 |
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| 145 | /* exec.h */
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| 146 | const char *pathopt; /**< set by padvance */
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| 147 |
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| 148 | /* eval.h */
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| 149 | char *commandname; /**< currently executing command */
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| 150 | int exitstatus; /**< exit status of last command */
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| 151 | int back_exitstatus;/**< exit status of backquoted command */
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| 152 | struct strlist *cmdenviron; /**< environment for builtin command */
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| 153 | int funcnest;
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| 154 | int evalskip;
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| 155 |
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| 156 | /* builtins.h */
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| 157 | const char *commandname;
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| 158 |
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| 159 | } shinstance;
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| 160 |
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| 161 |
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| 162 | extern shinstance *create_root_shell(shinstance *inherit, int argc, char **argv);
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| 163 |
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