xref: /minix/usr.bin/make/job.h (revision 84d9c625)
1 /*	$NetBSD: job.h,v 1.42 2013/07/05 22:14:56 sjg 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	"makeXXXXXX"		/* relative to tmpdir */
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 
94 struct emul_pollfd {
95     int fd;
96     short events;
97     short revents;
98 };
99 
100 #define	POLLIN		0x0001
101 #define	POLLOUT		0x0004
102 
103 int
104 emul_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 NULL 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) The output is being caught via a pipe and
126  *	   the descriptors of our pipe, an array in which output is line
127  *	   buffered and the current position in that buffer are all
128  *	   maintained for each job.
129  *	6) A word of flags which determine how the module handles errors,
130  *	   echoing, etc. for the job
131  *
132  * When a job is finished, the Make_Update function is called on each of the
133  * parents of the node which was just remade. This takes care of the upward
134  * traversal of the dependency graph.
135  */
136 struct pollfd;
137 
138 
139 #ifdef USE_META
140 # include "meta.h"
141 #endif
142 
143 #define JOB_BUFSIZE	1024
144 typedef struct Job {
145     int       	pid;	    /* The child's process ID */
146     GNode    	*node;      /* The target the child is making */
147     LstNode 	tailCmds;   /* The node of the first command to be
148 			     * saved when the job has been run */
149     FILE 	*cmdFILE;   /* When creating the shell script, this is
150 			     * where the commands go */
151     int		exit_status; /* from wait4() in signal handler */
152     char        job_state;  /* status of the job entry */
153 #define JOB_ST_FREE	0	/* Job is available */
154 #define JOB_ST_SETUP	1	/* Job is allocated but otherwise invalid */
155 #define JOB_ST_RUNNING	3	/* Job is running, pid valid */
156 #define JOB_ST_FINISHED	4	/* Job is done (ie after SIGCHILD) */
157     char        job_suspended;
158     short      	flags;	    /* Flags to control treatment of job */
159 #define	JOB_IGNERR	0x001	/* Ignore non-zero exits */
160 #define	JOB_SILENT	0x002	/* no output */
161 #define JOB_SPECIAL	0x004	/* Target is a special one. i.e. run it locally
162 				 * if we can't export it and maxLocal is 0 */
163 #define JOB_IGNDOTS	0x008  	/* Ignore "..." lines when processing
164 				 * commands */
165 #define JOB_TRACED	0x400	/* we've sent 'set -x' */
166 
167     int	  	 jobPipe[2];	/* Pipe for readind output from job */
168     struct pollfd *inPollfd;	/* pollfd associated with inPipe */
169     char  	outBuf[JOB_BUFSIZE + 1];
170 				/* Buffer for storing the output of the
171 				 * job, line by line */
172     int   	curPos;	/* Current position in op_outBuf */
173 
174 #ifdef USE_META
175     struct BuildMon	bm;
176 #endif
177 } Job;
178 
179 #define inPipe jobPipe[0]
180 #define outPipe jobPipe[1]
181 
182 
183 /*-
184  * Shell Specifications:
185  * Each shell type has associated with it the following information:
186  *	1) The string which must match the last character of the shell name
187  *	   for the shell to be considered of this type. The longest match
188  *	   wins.
189  *	2) A command to issue to turn off echoing of command lines
190  *	3) A command to issue to turn echoing back on again
191  *	4) What the shell prints, and its length, when given the echo-off
192  *	   command. This line will not be printed when received from the shell
193  *	5) A boolean to tell if the shell has the ability to control
194  *	   error checking for individual commands.
195  *	6) The string to turn this checking on.
196  *	7) The string to turn it off.
197  *	8) The command-flag to give to cause the shell to start echoing
198  *	   commands right away.
199  *	9) The command-flag to cause the shell to Lib_Exit when an error is
200  *	   detected in one of the commands.
201  *
202  * Some special stuff goes on if a shell doesn't have error control. In such
203  * a case, errCheck becomes a printf template for echoing the command,
204  * should echoing be on and ignErr becomes another printf template for
205  * executing the command while ignoring the return status. Finally errOut
206  * is a printf template for running the command and causing the shell to
207  * exit on error. If any of these strings are empty when hasErrCtl is FALSE,
208  * the command will be executed anyway as is and if it causes an error, so be
209  * it. Any templates setup to echo the command will escape any '$ ` \ "'i
210  * characters in the command string to avoid common problems with
211  * echo "%s\n" as a template.
212  */
213 typedef struct Shell {
214     const char	 *name;		/* the name of the shell. For Bourne and C
215 				 * shells, this is used only to find the
216 				 * shell description when used as the single
217 				 * source of a .SHELL target. For user-defined
218 				 * shells, this is the full path of the shell.
219 				 */
220     Boolean 	  hasEchoCtl;	/* True if both echoOff and echoOn defined */
221     const char   *echoOff;	/* command to turn off echo */
222     const char   *echoOn;	/* command to turn it back on again */
223     const char   *noPrint;	/* command to skip when printing output from
224 				 * shell. This is usually the command which
225 				 * was executed to turn off echoing */
226     int           noPLen;	/* length of noPrint command */
227     Boolean	  hasErrCtl;	/* set if can control error checking for
228 				 * individual commands */
229     const char	 *errCheck;	/* string to turn error checking on */
230     const char	 *ignErr;	/* string to turn off error checking */
231     const char	 *errOut;	/* string to use for testing exit code */
232     const char	 *newline;	/* string literal that results in a newline
233 				 * character when it appears outside of any
234 				 * 'quote' or "quote" characters */
235     char   commentChar;		/* character used by shell for comment lines */
236 
237     /*
238      * command-line flags
239      */
240     const char   *echo;		/* echo commands */
241     const char   *exit;		/* exit on error */
242 }               Shell;
243 
244 extern const char *shellPath;
245 extern const char *shellName;
246 extern char *shellErrFlag;
247 
248 extern int	jobTokensRunning; /* tokens currently "out" */
249 extern int	maxJobs;	/* Max jobs we can run */
250 
251 void Shell_Init(void);
252 const char *Shell_GetNewline(void);
253 void Job_Touch(GNode *, Boolean);
254 Boolean Job_CheckCommands(GNode *, void (*abortProc )(const char *, ...));
255 #define CATCH_BLOCK	1
256 void Job_CatchChildren(void);
257 void Job_CatchOutput(void);
258 void Job_Make(GNode *);
259 void Job_Init(void);
260 Boolean Job_Full(void);
261 Boolean Job_Empty(void);
262 ReturnStatus Job_ParseShell(char *);
263 int Job_Finish(void);
264 void Job_End(void);
265 void Job_Wait(void);
266 void Job_AbortAll(void);
267 void JobFlagForMigration(int);
268 void Job_TokenReturn(void);
269 Boolean Job_TokenWithdraw(void);
270 void Job_ServerStart(int, int, int);
271 void Job_SetPrefix(void);
272 Boolean Job_RunTarget(const char *, const char *);
273 
274 #endif /* _JOB_H_ */
275