| version 1.12, 2002/03/02 13:42:51 |
version 1.13, 2002/03/19 00:08:31 |
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| /*- |
/*- |
| * job.h -- |
* job.h -- |
| * Definitions pertaining to the running of jobs in parallel mode. |
* Definitions pertaining to the running of jobs in parallel mode. |
| * Exported from job.c for the use of remote-execution modules. |
|
| */ |
*/ |
| #define TMPPAT "/tmp/makeXXXXXXXXXX" |
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| |
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| /* |
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| * The SEL_ constants determine the maximum amount of time spent in select |
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| * before coming out to see if a child has finished. SEL_SEC is the number of |
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| * seconds and SEL_USEC is the number of micro-seconds |
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| */ |
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| #define SEL_SEC 0 |
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| #define SEL_USEC 500000 |
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| |
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| |
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| /*- |
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| * Job Table definitions. |
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| * |
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| * Each job has several things associated with it: |
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| * 1) The process id of the child shell |
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| * 2) The graph node describing the target being made by this job |
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| * 3) A LstNode for the first command to be saved after the job |
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| * completes. This is NULL if there was no "..." in the job's |
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| * commands. |
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| * 4) An FILE* for writing out the commands. This is only |
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| * used before the job is actually started. |
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| * 5) A union of things used for handling the shell's output. Different |
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| * parts of the union are used based on the value of the usePipes |
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| * flag. If it is true, the output is being caught via a pipe and |
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| * the descriptors of our pipe, an array in which output is line |
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| * buffered and the current position in that buffer are all |
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| * maintained for each job. If, on the other hand, usePipes is false, |
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| * the output is routed to a temporary file and all that is kept |
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| * is the name of the file and the descriptor open to the file. |
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| * 6) An identifier provided by and for the exclusive use of the |
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| * Rmt module. |
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| * 7) A word of flags which determine how the module handles errors, |
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| * echoing, etc. for the job |
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| * |
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| * The job "table" is kept as a linked Lst in 'jobs', with the number of |
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| * active jobs maintained in the 'nJobs' variable. At no time will this |
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| * exceed the value of 'maxJobs', initialized by the Job_Init function. |
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| * |
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| * When a job is finished, the Make_Update function is called on each of the |
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| * parents of the node which was just remade. This takes care of the upward |
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| * traversal of the dependency graph. |
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| */ |
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| #define JOB_BUFSIZE 1024 |
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| typedef struct Job_ { |
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| int pid; /* The child's process ID */ |
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| GNode *node; /* The target the child is making */ |
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| LstNode tailCmds; /* The node of the first command to be |
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| * saved when the job has been run */ |
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| FILE *cmdFILE; /* When creating the shell script, this is |
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| * where the commands go */ |
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| int rmtID; /* ID returned from Rmt module */ |
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| short flags; /* Flags to control treatment of job */ |
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| #define JOB_IGNERR 0x001 /* Ignore non-zero exits */ |
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| #define JOB_SILENT 0x002 /* no output */ |
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| #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally |
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| * if we can't export it and maxLocal is 0 */ |
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| #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing |
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| * commands */ |
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| #define JOB_FIRST 0x020 /* Job is first job for the node */ |
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| #define JOB_RESTART 0x080 /* Job needs to be completely restarted */ |
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| #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped, |
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| * for some reason */ |
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| #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job. |
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| * Used to avoid infinite recursion between |
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| * JobFinish and JobRestart */ |
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| union { |
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| struct { |
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| int op_inPipe; /* Input side of pipe associated |
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| * with job's output channel */ |
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| int op_outPipe; /* Output side of pipe associated with |
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| * job's output channel */ |
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| char op_outBuf[JOB_BUFSIZE + 1]; |
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| /* Buffer for storing the output of the |
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| * job, line by line */ |
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| int op_curPos; /* Current position in op_outBuf */ |
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| } o_pipe; /* data used when catching the output via |
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| * a pipe */ |
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| struct { |
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| char of_outFile[sizeof(TMPPAT)]; |
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| /* Name of file to which shell output |
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| * was rerouted */ |
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| int of_outFd; /* Stream open to the output |
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| * file. Used to funnel all |
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| * from a single job to one file |
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| * while still allowing |
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| * multiple shell invocations */ |
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| } o_file; /* Data used when catching the output in |
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| * a temporary file */ |
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| } output; /* Data for tracking a shell's output */ |
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| } Job; |
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| |
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| #define outPipe output.o_pipe.op_outPipe |
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| #define inPipe output.o_pipe.op_inPipe |
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| #define outBuf output.o_pipe.op_outBuf |
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| #define curPos output.o_pipe.op_curPos |
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| #define outFile output.o_file.of_outFile |
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| #define outFd output.o_file.of_outFd |
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| |
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| |
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| /*- |
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| * Shell Specifications: |
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| * Each shell type has associated with it the following information: |
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| * 1) The string which must match the last character of the shell name |
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| * for the shell to be considered of this type. The longest match |
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| * wins. |
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| * 2) A command to issue to turn off echoing of command lines |
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| * 3) A command to issue to turn echoing back on again |
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| * 4) What the shell prints, and its length, when given the echo-off |
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| * command. This line will not be printed when received from the shell |
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| * 5) A boolean to tell if the shell has the ability to control |
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| * error checking for individual commands. |
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| * 6) The string to turn this checking on. |
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| * 7) The string to turn it off. |
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| * 8) The command-flag to give to cause the shell to start echoing |
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| * commands right away. |
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| * 9) The command-flag to cause the shell to Lib_Exit when an error is |
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| * detected in one of the commands. |
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| * |
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| * Some special stuff goes on if a shell doesn't have error control. In such |
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| * a case, errCheck becomes a printf template for echoing the command, |
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| * should echoing be on and ignErr becomes another printf template for |
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| * executing the command while ignoring the return status. If either of these |
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| * strings is empty when hasErrCtl is false, the command will be executed |
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| * anyway as is and if it causes an error, so be it. |
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| */ |
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| typedef struct Shell_ { |
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| char *name; /* the name of the shell. For Bourne and C |
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| * shells, this is used only to find the |
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| * shell description when used as the single |
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| * source of a .SHELL target. For user-defined |
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| * shells, this is the full path of the shell. |
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| */ |
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| bool hasEchoCtl; /* True if both echoOff and echoOn defined */ |
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| char *echoOff; /* command to turn off echo */ |
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| char *echoOn; /* command to turn it back on again */ |
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| char *noPrint; /* command to skip when printing output from |
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| * shell. This is usually the command which |
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| * was executed to turn off echoing */ |
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| int noPLen; /* length of noPrint command */ |
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| bool hasErrCtl; /* set if can control error checking for |
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| * individual commands */ |
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| char *errCheck; /* string to turn error checking on */ |
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| char *ignErr; /* string to turn off error checking */ |
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| /* |
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| * command-line flags |
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| */ |
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| char *echo; /* echo commands */ |
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| char *exit; /* exit on error */ |
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| } Shell; |
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| |
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| |
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| extern void Job_Touch(GNode *, bool); |
extern void Job_Touch(GNode *, bool); |
| extern bool Job_CheckCommands(GNode *, |
extern bool Job_CheckCommands(GNode *, |
| void (*abortProc )(char *, ...)); |
void (*abortProc )(char *, ...)); |
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| #endif |
#endif |
| extern void Job_Wait(void); |
extern void Job_Wait(void); |
| extern void Job_AbortAll(void); |
extern void Job_AbortAll(void); |
| extern void JobFlagForMigration(int); |
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| |
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| #endif /* _JOB_H_ */ |
#endif /* _JOB_H_ */ |
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