| 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 | #include <signal.h> /* NSIG */
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| 32 | #ifndef _MSC_VER
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| 33 | # include <termios.h>
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| 34 | # include <sys/ioctl.h>
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| 35 | # include <sys/resource.h>
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| 36 | #endif
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| 37 | #include <errno.h>
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| 38 | #ifdef _MSC_VER
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| 39 | # define EWOULDBLOCK 512
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| 40 | #endif
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| 41 |
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| 42 | #include "shtypes.h"
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| 43 | #include "shthread.h"
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| 44 | #include "shfile.h"
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| 45 | #include "output.h"
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| 46 | #include "options.h"
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| 47 |
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| 48 | #include "expand.h"
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| 49 | #include "exec.h"
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| 50 | #include "var.h"
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| 51 |
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| 52 | #ifdef _MSC_VER
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| 53 | # define strcasecmp stricmp
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| 54 | # define strncasecmp strnicmp
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| 55 | #endif
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| 56 |
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| 57 |
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| 58 | /* memalloc.c */
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| 59 | #define MINSIZE 504 /* minimum size of a block */
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| 60 | struct stack_block {
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| 61 | struct stack_block *prev;
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| 62 | char space[MINSIZE];
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| 63 | };
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| 64 |
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| 65 | /* input.c */
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| 66 | struct strpush {
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| 67 | struct strpush *prev; /* preceding string on stack */
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| 68 | char *prevstring;
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| 69 | int prevnleft;
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| 70 | int prevlleft;
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| 71 | struct alias *ap; /* if push was associated with an alias */
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| 72 | };
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| 73 |
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| 74 | /*
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| 75 | * The parsefile structure pointed to by the global variable parsefile
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| 76 | * contains information about the current file being read.
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| 77 | */
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| 78 | struct parsefile {
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| 79 | struct parsefile *prev; /* preceding file on stack */
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| 80 | int linno; /* current line */
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| 81 | int fd; /* file descriptor (or -1 if string) */
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| 82 | int nleft; /* number of chars left in this line */
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| 83 | int lleft; /* number of chars left in this buffer */
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| 84 | char *nextc; /* next char in buffer */
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| 85 | char *buf; /* input buffer */
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| 86 | struct strpush *strpush; /* for pushing strings at this level */
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| 87 | struct strpush basestrpush; /* so pushing one is fast */
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| 88 | };
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| 89 |
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| 90 | /* exec.c */
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| 91 | #define CMDTABLESIZE 31 /* should be prime */
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| 92 | #define ARB 1 /* actual size determined at run time */
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| 93 |
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| 94 | struct tblentry {
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| 95 | struct tblentry *next; /* next entry in hash chain */
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| 96 | union param param; /* definition of builtin function */
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| 97 | short cmdtype; /* index identifying command */
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| 98 | char rehash; /* if set, cd done since entry created */
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| 99 | char cmdname[ARB]; /* name of command */
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| 100 | };
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| 101 |
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| 102 | /* expand.c */
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| 103 | /*
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| 104 | * Structure specifying which parts of the string should be searched
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| 105 | * for IFS characters.
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| 106 | */
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| 107 | struct ifsregion {
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| 108 | struct ifsregion *next; /* next region in list */
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| 109 | int begoff; /* offset of start of region */
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| 110 | int endoff; /* offset of end of region */
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| 111 | int inquotes; /* search for nul bytes only */
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| 112 | };
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| 113 |
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| 114 |
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| 115 | /**
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| 116 | * A shell instance.
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| 117 | *
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| 118 | * This is the core structure of the shell, it contains all
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| 119 | * the data associated with a shell process except that it's
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| 120 | * running in a thread and not a separate process.
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| 121 | */
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| 122 | struct shinstance
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| 123 | {
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| 124 | struct shinstance *next; /**< The next shell instance. */
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| 125 | struct shinstance *prev; /**< The previous shell instance. */
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| 126 | struct shinstance *parent; /**< The parent shell instance. */
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| 127 | pid_t pid; /**< The (fake) process id of this shell instance. */
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| 128 | shtid tid; /**< The thread identifier of the thread for this shell. */
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| 129 | shfdtab fdtab; /**< The file descriptor table. */
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| 130 |
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| 131 | /* alias.c */
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| 132 | #define ATABSIZE 39
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| 133 | struct alias *atab[ATABSIZE];
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| 134 |
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| 135 | /* cd.c */
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| 136 | char *curdir; /**< current working directory */
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| 137 | char *prevdir; /**< previous working directory */
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| 138 | char *cdcomppath;
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| 139 | int getpwd_first; /**< static in getpwd. (initialized to 1!) */
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| 140 |
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| 141 | /* error.h */
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| 142 | struct jmploc *handler;
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| 143 | int exception;
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| 144 | int exerrno/* = 0 */; /**< Last exec error */
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| 145 | int volatile suppressint;
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| 146 | int volatile intpending;
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| 147 |
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| 148 | /* error.c */
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| 149 | char errmsg_buf[16]; /**< static in errmsg. (bss) */
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| 150 |
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| 151 | /* eval.h */
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| 152 | char *commandname; /**< currently executing command */
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| 153 | int exitstatus; /**< exit status of last command */
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| 154 | int back_exitstatus;/**< exit status of backquoted command */
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| 155 | struct strlist *cmdenviron; /**< environment for builtin command */
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| 156 | int funcnest; /**< depth of function calls */
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| 157 | int evalskip; /**< set if we are skipping commands */
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| 158 | int skipcount; /**< number of levels to skip */
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| 159 | int loopnest; /**< current loop nesting level */
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| 160 |
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| 161 | /* eval.c */
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| 162 | int vforked;
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| 163 |
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| 164 | /* expand.c */
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| 165 | char *expdest; /**< output of current string */
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| 166 | struct nodelist *argbackq; /**< list of back quote expressions */
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| 167 | struct ifsregion ifsfirst; /**< first struct in list of ifs regions */
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| 168 | struct ifsregion *ifslastp; /**< last struct in list */
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| 169 | struct arglist exparg; /**< holds expanded arg list */
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| 170 | char *expdir; /**< Used by expandmeta. */
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| 171 |
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| 172 | /* exec.h */
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| 173 | const char *pathopt; /**< set by padvance */
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| 174 |
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| 175 | /* exec.c */
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| 176 | struct tblentry *cmdtable[CMDTABLESIZE];
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| 177 | int builtinloc/* = -1*/; /**< index in path of %builtin, or -1 */
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| 178 |
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| 179 | /* input.h */
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| 180 | int plinno/* = 1 */;/**< input line number */
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| 181 | int parsenleft; /**< number of characters left in input buffer */
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| 182 | char *parsenextc; /**< next character in input buffer */
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| 183 | int init_editline/* = 0 */; /**< 0 == not setup, 1 == OK, -1 == failed */
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| 184 |
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| 185 | /* input.c */
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| 186 | int parselleft; /**< copy of parsefile->lleft */
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| 187 | struct parsefile basepf; /**< top level input file */
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| 188 | char basebuf[BUFSIZ];/**< buffer for top level input file */
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| 189 | struct parsefile *parsefile/* = &basepf*/; /**< current input file */
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| 190 | #ifndef SMALL
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| 191 | EditLine *el; /**< cookie for editline package */
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| 192 | #endif
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| 193 |
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| 194 | /* jobs.h */
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| 195 | pid_t backgndpid/* = -1 */; /**< pid of last background process */
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| 196 | int job_warning; /**< user was warned about stopped jobs */
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| 197 |
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| 198 | /* jobs.c */
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| 199 | struct job *jobtab; /**< array of jobs */
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| 200 | int njobs; /**< size of array */
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| 201 | int jobs_invalid; /**< set in child */
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| 202 | #if JOBS
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| 203 | int initialpgrp; /**< pgrp of shell on invocation */
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| 204 | int curjob/* = -1*/;/**< current job */
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| 205 | #endif
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| 206 | int ttyfd/* = -1*/;
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| 207 | int jobctl; /**< job control enabled / disabled */
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| 208 | char *cmdnextc;
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| 209 | int cmdnleft;
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| 210 |
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| 211 | /* mail.c */
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| 212 | #define MAXMBOXES 10
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| 213 | int nmboxes; /**< number of mailboxes */
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| 214 | time_t mailtime[MAXMBOXES]; /**< times of mailboxes */
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| 215 |
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| 216 | /* main.h */
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| 217 | int rootpid; /**< pid of main shell. */
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| 218 | int rootshell; /**< true if we aren't a child of the main shell. */
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| 219 | struct shinstance *psh_rootshell; /**< The root shell pointer. (!rootshell) */
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| 220 |
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| 221 | /* memalloc.h */
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| 222 | char *stacknxt/* = stackbase.space*/;
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| 223 | int stacknleft/* = MINSIZE*/;
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| 224 | int sstrnleft;
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| 225 | int herefd/* = -1 */;
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| 226 |
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| 227 | /* memalloc.c */
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| 228 | struct stack_block stackbase;
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| 229 | struct stack_block *stackp/* = &stackbase*/;
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| 230 | struct stackmark *markp;
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| 231 |
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| 232 | /* myhistedit.h */
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| 233 | int displayhist;
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| 234 | #ifndef SMALL
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| 235 | History *hist;
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| 236 | EditLine *el;
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| 237 | #endif
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| 238 |
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| 239 | /* output.h */
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| 240 | struct output output;
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| 241 | struct output errout;
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| 242 | struct output memout;
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| 243 | struct output *out1;
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| 244 | struct output *out2;
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| 245 |
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| 246 | /* output.c */
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| 247 | #define OUTBUFSIZ BUFSIZ
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| 248 | #define MEM_OUT -3 /**< output to dynamically allocated memory */
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| 249 |
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| 250 | /* options.h */
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| 251 | struct optent optlist[NOPTS];
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| 252 | char *minusc; /**< argument to -c option */
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| 253 | char *arg0; /**< $0 */
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| 254 | struct shparam shellparam; /**< $@ */
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| 255 | char **argptr; /**< argument list for builtin commands */
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| 256 | char *optionarg; /**< set by nextopt */
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| 257 | char *optptr; /**< used by nextopt */
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| 258 |
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| 259 | /* parse.h */
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| 260 | int tokpushback;
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| 261 | int whichprompt; /**< 1 == PS1, 2 == PS2 */
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| 262 |
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| 263 | /* parser.c */
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| 264 | int noalias/* = 0*/;/**< when set, don't handle aliases */
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| 265 | struct heredoc *heredoclist; /**< list of here documents to read */
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| 266 | int parsebackquote; /**< nonzero if we are inside backquotes */
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| 267 | int doprompt; /**< if set, prompt the user */
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| 268 | int needprompt; /**< true if interactive and at start of line */
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| 269 | int lasttoken; /**< last token read */
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| 270 | char *wordtext; /**< text of last word returned by readtoken */
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| 271 | int checkkwd; /**< 1 == check for kwds, 2 == also eat newlines */
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| 272 | struct nodelist *backquotelist;
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| 273 | union node *redirnode;
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| 274 | struct heredoc *heredoc;
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| 275 | int quoteflag; /**< set if (part of) last token was quoted */
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| 276 | int startlinno; /**< line # where last token started */
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| 277 |
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| 278 | /* redir.c */
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| 279 | struct redirtab *redirlist;
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| 280 | int fd0_redirected/* = 0*/;
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| 281 |
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| 282 | /* trap.h */
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| 283 | int pendingsigs; /**< indicates some signal received */
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| 284 |
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| 285 | /* trap.c */
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| 286 | char gotsig[NSIG]; /**< indicates specified signal received */
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| 287 | char *trap[NSIG+1]; /**< trap handler commands */
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| 288 | char sigmode[NSIG]; /**< current value of signal */
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| 289 |
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| 290 | /* var.h */
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| 291 | struct localvar *localvars;
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| 292 | #if ATTY
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| 293 | struct var vatty;
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| 294 | #endif
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| 295 | struct var vifs;
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| 296 | struct var vmail;
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| 297 | struct var vmpath;
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| 298 | struct var vpath;
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| 299 | #ifdef _MSC_VER
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| 300 | struct var vpath2;
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| 301 | #endif
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| 302 | struct var vps1;
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| 303 | struct var vps2;
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| 304 | struct var vps4;
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| 305 | #ifndef SMALL
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| 306 | struct var vterm;
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| 307 | struct var vhistsize;
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| 308 | #endif
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| 309 | struct var voptind;
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| 310 | #ifdef PC_OS2_LIBPATHS
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| 311 | struct var libpath_vars[4];
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| 312 | #endif
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| 313 | #ifdef SMALL
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| 314 | # define VTABSIZE 39
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| 315 | #else
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| 316 | # define VTABSIZE 517
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| 317 | #endif
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| 318 | struct var *vartab[VTABSIZE];
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| 319 |
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| 320 | /* builtins.h */
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| 321 |
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| 322 | /* bltin/test.c */
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| 323 | char **t_wp;
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| 324 | struct t_op const *t_wp_op;
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| 325 |
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| 326 | };
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| 327 |
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| 328 |
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| 329 | extern shinstance *sh_create_root_shell(shinstance *, int, char **);
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| 330 | char *sh_getenv(shinstance *, const char *);
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| 331 | const char *sh_gethomedir(shinstance *, const char *);
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| 332 |
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| 333 | /* signals */
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| 334 | typedef void (*sh_sig_t)(shinstance *, int);
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| 335 | #ifdef _MSC_VER
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| 336 | typedef uint32_t sh_sigset_t;
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| 337 | #else
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| 338 | typedef sigset_t sh_sigset_t;
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| 339 | #endif
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| 340 | struct sh_sigaction
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| 341 | {
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| 342 | sh_sig_t sh_handler;
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| 343 | sh_sigset_t sh_mask;
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| 344 | int sh_flags;
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| 345 | };
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| 346 | #define SH_SIG_DFL ((sh_sig_t)SIG_DFL)
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| 347 | #define SH_SIG_IGN ((sh_sig_t)SIG_IGN)
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| 348 | #ifdef _MSC_VER
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| 349 | # define SIG_BLOCK 1
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| 350 | # define SIG_UNBLOCK 2
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| 351 | # define SIG_SETMASK 3
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| 352 | # define SIGHUP 5
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| 353 | # define SIGQUIT 9
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| 354 | # define SIGPIPE 12
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| 355 | # define SIGTTOU 17
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| 356 | # define SIGTSTP 18
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| 357 | # define SIGTTIN 19
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| 358 | # define SIGCONT 20
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| 359 | extern const char * const sys_siglist[NSIG];
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| 360 | #endif /* _MSC_VER */
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| 361 | #ifdef __sun__
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| 362 | # define sys_siglist _sys_siglist
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| 363 | #endif
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| 364 |
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| 365 | int sh_sigaction(int, const struct sh_sigaction *, struct sh_sigaction *);
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| 366 | sh_sig_t sh_signal(shinstance *, int, sh_sig_t);
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| 367 | int sh_siginterrupt(shinstance *, int, int);
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| 368 | void sh_sigemptyset(sh_sigset_t *);
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| 369 | int sh_sigprocmask(shinstance *, int, sh_sigset_t const *, sh_sigset_t *);
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| 370 | void sh_abort(shinstance *);
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| 371 | void sh_raise_sigint(shinstance *);
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| 372 | int sh_kill(shinstance *, pid_t, int);
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| 373 | int sh_killpg(shinstance *, pid_t, int);
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| 374 |
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| 375 | /* times */
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| 376 | #include <time.h>
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| 377 | #ifdef _MSC_VER
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| 378 | typedef struct shtms
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| 379 | {
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| 380 | clock_t tms_utime;
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| 381 | clock_t tms_stime;
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| 382 | clock_t tms_cutime;
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| 383 | clock_t tms_cstime;
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| 384 | } shtms;
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| 385 | #else
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| 386 | # include <sys/times.h>
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| 387 | typedef struct tms shtms;
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| 388 | #endif
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| 389 | clock_t sh_times(shinstance *, shtms *);
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| 390 | int sh_sysconf_clk_tck(void);
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| 391 |
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| 392 | /* wait / process */
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| 393 | #ifdef _MSC_VER
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| 394 | # include <process.h>
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| 395 | # define WNOHANG 1 /* Don't hang in wait. */
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| 396 | # define WUNTRACED 2 /* Tell about stopped, untraced children. */
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| 397 | # define WCONTINUED 4 /* Report a job control continued process. */
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| 398 | # define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
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| 399 | # define WCOREFLAG 0200
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| 400 | # define _WSTATUS(x) (_W_INT(x) & 0177)
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| 401 | # define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
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| 402 | # define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
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| 403 | # define WSTOPSIG(x) (_W_INT(x) >> 8)
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| 404 | # define WIFSIGNALED(x) (_WSTATUS(x) != 0 && !WIFSTOPPED(x) && !WIFCONTINUED(x)) /* bird: made GLIBC tests happy. */
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| 405 | # define WTERMSIG(x) (_WSTATUS(x))
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| 406 | # define WIFEXITED(x) (_WSTATUS(x) == 0)
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| 407 | # define WEXITSTATUS(x) (_W_INT(x) >> 8)
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| 408 | # define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
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| 409 | # define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
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| 410 | # define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
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| 411 | # define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
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| 412 | #else
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| 413 | # include <sys/wait.h>
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| 414 | #endif
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| 415 | pid_t sh_fork(shinstance *);
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| 416 | pid_t sh_waitpid(shinstance *, pid_t, int *, int);
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| 417 | void sh__exit(shinstance *, int);
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| 418 | int sh_execve(shinstance *, const char *, const char * const*, const char * const *);
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| 419 | uid_t sh_getuid(shinstance *);
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| 420 | uid_t sh_geteuid(shinstance *);
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| 421 | gid_t sh_getgid(shinstance *);
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| 422 | gid_t sh_getegid(shinstance *);
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| 423 | pid_t sh_getpid(shinstance *);
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| 424 | pid_t sh_getpgrp(shinstance *);
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| 425 | pid_t sh_getpgid(shinstance *, pid_t);
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| 426 | int sh_setpgid(shinstance *, pid_t, pid_t);
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| 427 |
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| 428 | /* tc* */
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| 429 | pid_t sh_tcgetpgrp(shinstance *, int);
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| 430 | int sh_tcsetpgrp(shinstance *, int, pid_t);
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| 431 |
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| 432 | /* sys/resourece.h */
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| 433 | #ifdef _MSC_VER
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| 434 | typedef int64_t shrlim_t;
|
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| 435 | typedef struct shrlimit
|
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| 436 | {
|
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| 437 | shrlim_t rlim_cur;
|
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| 438 | shrlim_t rlim_max;
|
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| 439 | } shrlimit;
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| 440 | # define RLIMIT_CPU 0
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| 441 | # define RLIMIT_FSIZE 1
|
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| 442 | # define RLIMIT_DATA 2
|
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| 443 | # define RLIMIT_STACK 3
|
|---|
| 444 | # define RLIMIT_CORE 4
|
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| 445 | # define RLIMIT_RSS 5
|
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| 446 | # define RLIMIT_MEMLOCK 6
|
|---|
| 447 | # define RLIMIT_NPROC 7
|
|---|
| 448 | # define RLIMIT_NOFILE 8
|
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| 449 | # define RLIMIT_SBSIZE 9
|
|---|
| 450 | # define RLIMIT_VMEM 10
|
|---|
| 451 | # define RLIM_NLIMITS 11
|
|---|
| 452 | # define RLIM_INFINITY (0x7fffffffffffffffLL)
|
|---|
| 453 | #else
|
|---|
| 454 | typedef rlim_t shrlim_t;
|
|---|
| 455 | typedef struct rlimit shrlimit;
|
|---|
| 456 | #endif
|
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| 457 | int sh_getrlimit(shinstance *, int, shrlimit *);
|
|---|
| 458 | int sh_setrlimit(shinstance *, int, const shrlimit *);
|
|---|
| 459 |
|
|---|
| 460 | #endif
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