job.h revision 1.26
1/* $NetBSD: job.h,v 1.26 2006/03/13 20:35:09 dsl Exp $ */ 2 3/* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)job.h 8.1 (Berkeley) 6/6/93 35 */ 36 37/* 38 * Copyright (c) 1988, 1989 by Adam de Boor 39 * Copyright (c) 1989 by Berkeley Softworks 40 * All rights reserved. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * Adam de Boor. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by the University of 56 * California, Berkeley and its contributors. 57 * 4. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 * from: @(#)job.h 8.1 (Berkeley) 6/6/93 74 */ 75 76/*- 77 * job.h -- 78 * Definitions pertaining to the running of jobs in parallel mode. 79 */ 80#ifndef _JOB_H_ 81#define _JOB_H_ 82 83#define TMPPAT "/tmp/makeXXXXXX" 84 85#ifdef USE_SELECT 86/* 87 * Emulate poll() in terms of select(). This is not a complete 88 * emulation but it is sufficient for make's purposes. 89 */ 90 91#define poll emul_poll 92#define pollfd emul_pollfd 93 94struct emul_pollfd { 95 int fd; 96 short events; 97 short revents; 98}; 99 100#define POLLIN 0x0001 101#define POLLOUT 0x0004 102 103int 104emul_poll(struct pollfd *fd, int nfd, int timeout); 105#endif 106 107/* 108 * The POLL_MSEC constant determines the maximum number of milliseconds spent 109 * in poll before coming out to see if a child has finished. 110 */ 111#define POLL_MSEC 5000 112 113 114/*- 115 * Job Table definitions. 116 * 117 * Each job has several things associated with it: 118 * 1) The process id of the child shell 119 * 2) The graph node describing the target being made by this job 120 * 3) A LstNode for the first command to be saved after the job 121 * completes. This is NILLNODE if there was no "..." in the job's 122 * commands. 123 * 4) An FILE* for writing out the commands. This is only 124 * used before the job is actually started. 125 * 5) A union of things used for handling the shell's output. Different 126 * parts of the union are used based on the value of the usePipes 127 * flag. If it is true, the output is being caught via a pipe and 128 * the descriptors of our pipe, an array in which output is line 129 * buffered and the current position in that buffer are all 130 * maintained for each job. If, on the other hand, usePipes is false, 131 * the output is routed to a temporary file and all that is kept 132 * is the name of the file and the descriptor open to the file. 133 * 6) A word of flags which determine how the module handles errors, 134 * echoing, etc. for the job 135 * 136 * The job "table" is kept as a linked Lst in 'jobs', with the number of 137 * active jobs maintained in the 'nJobs' variable. At no time will this 138 * exceed the value of 'maxJobs', initialized by the Job_Init function. 139 * 140 * When a job is finished, the Make_Update function is called on each of the 141 * parents of the node which was just remade. This takes care of the upward 142 * traversal of the dependency graph. 143 */ 144struct pollfd; 145 146#define JOB_BUFSIZE 1024 147typedef struct Job { 148 int pid; /* The child's process ID */ 149 GNode *node; /* The target the child is making */ 150 LstNode tailCmds; /* The node of the first command to be 151 * saved when the job has been run */ 152 FILE *cmdFILE; /* When creating the shell script, this is 153 * where the commands go */ 154 short flags; /* Flags to control treatment of job */ 155#define JOB_IGNERR 0x001 /* Ignore non-zero exits */ 156#define JOB_SILENT 0x002 /* no output */ 157#define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally 158 * if we can't export it and maxLocal is 0 */ 159#define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing 160 * commands */ 161#define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped, 162 * for some reason */ 163#define JOB_CONTINUING 0x200 /* We are in the process of resuming this job. 164 * Used to avoid infinite recursion between 165 * JobFinish and JobRestart */ 166#define JOB_TRACED 0x400 /* we've sent 'set -x' */ 167 168 union { 169 struct { 170 int op_inPipe; /* Input side of pipe associated 171 * with job's output channel */ 172 struct pollfd *op_inPollfd; /* pollfd associated with inPipe */ 173 int op_outPipe; /* Output side of pipe associated with 174 * job's output channel */ 175 char op_outBuf[JOB_BUFSIZE + 1]; 176 /* Buffer for storing the output of the 177 * job, line by line */ 178 int op_curPos; /* Current position in op_outBuf */ 179 } o_pipe; /* data used when catching the output via 180 * a pipe */ 181 struct { 182 char of_outFile[sizeof(TMPPAT)+2]; 183 /* Name of file to which shell output 184 * was rerouted */ 185 int of_outFd; /* Stream open to the output 186 * file. Used to funnel all 187 * from a single job to one file 188 * while still allowing 189 * multiple shell invocations */ 190 } o_file; /* Data used when catching the output in 191 * a temporary file */ 192 } output; /* Data for tracking a shell's output */ 193} Job; 194 195#define outPipe output.o_pipe.op_outPipe 196#define inPipe output.o_pipe.op_inPipe 197#define inPollfd output.o_pipe.op_inPollfd 198#define outBuf output.o_pipe.op_outBuf 199#define curPos output.o_pipe.op_curPos 200#define outFile output.o_file.of_outFile 201#define outFd output.o_file.of_outFd 202 203 204/*- 205 * Shell Specifications: 206 * Each shell type has associated with it the following information: 207 * 1) The string which must match the last character of the shell name 208 * for the shell to be considered of this type. The longest match 209 * wins. 210 * 2) A command to issue to turn off echoing of command lines 211 * 3) A command to issue to turn echoing back on again 212 * 4) What the shell prints, and its length, when given the echo-off 213 * command. This line will not be printed when received from the shell 214 * 5) A boolean to tell if the shell has the ability to control 215 * error checking for individual commands. 216 * 6) The string to turn this checking on. 217 * 7) The string to turn it off. 218 * 8) The command-flag to give to cause the shell to start echoing 219 * commands right away. 220 * 9) The command-flag to cause the shell to Lib_Exit when an error is 221 * detected in one of the commands. 222 * 223 * Some special stuff goes on if a shell doesn't have error control. In such 224 * a case, errCheck becomes a printf template for echoing the command, 225 * should echoing be on and ignErr becomes another printf template for 226 * executing the command while ignoring the return status. Finally errOut 227 * is a printf template for running the command and causing the shell to 228 * exit on error. If any of these strings are empty when hasErrCtl is FALSE, 229 * the command will be executed anyway as is and if it causes an error, so be 230 * it. Any templates setup to echo the command will escape any '$ ` \ "'i 231 * characters in the command string to avoid common problems with 232 * echo "%s\n" as a template. 233 */ 234typedef struct Shell { 235 const char *name; /* the name of the shell. For Bourne and C 236 * shells, this is used only to find the 237 * shell description when used as the single 238 * source of a .SHELL target. For user-defined 239 * shells, this is the full path of the shell. 240 */ 241 Boolean hasEchoCtl; /* True if both echoOff and echoOn defined */ 242 const char *echoOff; /* command to turn off echo */ 243 const char *echoOn; /* command to turn it back on again */ 244 const char *noPrint; /* command to skip when printing output from 245 * shell. This is usually the command which 246 * was executed to turn off echoing */ 247 int noPLen; /* length of noPrint command */ 248 Boolean hasErrCtl; /* set if can control error checking for 249 * individual commands */ 250 const char *errCheck; /* string to turn error checking on */ 251 const char *ignErr; /* string to turn off error checking */ 252 const char *errOut; /* string to use for testing exit code */ 253 char commentChar; /* character used by shell for comment lines */ 254 255 /* 256 * command-line flags 257 */ 258 const char *echo; /* echo commands */ 259 const char *exit; /* exit on error */ 260} Shell; 261 262extern const char *shellPath; 263extern const char *shellName; 264 265extern int job_pipe[2]; /* token pipe for jobs. */ 266extern int jobTokensRunning; /* tokens currently "out" */ 267extern int not_parallel; /* => only run one job */ 268 269void Shell_Init(void); 270void Job_Touch(GNode *, Boolean); 271Boolean Job_CheckCommands(GNode *, void (*abortProc )(const char *, ...)); 272void Job_CatchChildren(Boolean); 273void Job_CatchOutput(void); 274void Job_Make(GNode *); 275void Job_Init(int); 276Boolean Job_Full(void); 277Boolean Job_Empty(void); 278ReturnStatus Job_ParseShell(char *); 279int Job_Finish(void); 280void Job_End(void); 281void Job_Wait(void); 282void Job_AbortAll(void); 283void JobFlagForMigration(int); 284void Job_TokenReturn(void); 285Boolean Job_TokenWithdraw(void); 286void Job_ServerStart(int); 287 288#endif /* _JOB_H_ */ 289