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7c673cae FG |
1 | /* |
2 | * Copyright 1993, 1995 Christopher Seiwald. | |
3 | * Copyright 2007 Noel Belcourt. | |
4 | * | |
5 | * This file is part of Jam - see jam.c for Copyright information. | |
6 | */ | |
7 | ||
8 | #include "jam.h" | |
9 | #include "execcmd.h" | |
10 | ||
11 | #include "lists.h" | |
12 | #include "output.h" | |
13 | #include "strings.h" | |
14 | ||
15 | #include <errno.h> | |
16 | #include <signal.h> | |
17 | #include <stdio.h> | |
18 | #include <time.h> | |
19 | #include <unistd.h> /* vfork(), _exit(), STDOUT_FILENO and such */ | |
20 | #include <sys/resource.h> | |
21 | #include <sys/times.h> | |
22 | #include <sys/wait.h> | |
b32b8144 | 23 | #include <poll.h> |
7c673cae FG |
24 | |
25 | #if defined(sun) || defined(__sun) | |
26 | #include <wait.h> | |
27 | #endif | |
28 | ||
29 | #ifdef USE_EXECUNIX | |
30 | ||
31 | #include <sys/times.h> | |
32 | ||
33 | #if defined(__APPLE__) | |
34 | #define NO_VFORK | |
35 | #endif | |
36 | ||
37 | #ifdef NO_VFORK | |
38 | #define vfork() fork() | |
39 | #endif | |
40 | ||
41 | ||
42 | /* | |
43 | * execunix.c - execute a shell script on UNIX/OS2/AmigaOS | |
44 | * | |
45 | * If $(JAMSHELL) is defined, uses that to formulate execvp()/spawnvp(). The | |
46 | * default is: /bin/sh -c | |
47 | * | |
48 | * In $(JAMSHELL), % expands to the command string and ! expands to the slot | |
49 | * number (starting at 1) for multiprocess (-j) invocations. If $(JAMSHELL) does | |
50 | * not include a %, it is tacked on as the last argument. | |
51 | * | |
52 | * Each word must be an individual element in a jam variable value. | |
53 | * | |
54 | * Do not just set JAMSHELL to /bin/sh - it will not work! | |
55 | * | |
56 | * External routines: | |
57 | * exec_check() - preprocess and validate the command. | |
58 | * exec_cmd() - launch an async command execution. | |
59 | * exec_wait() - wait for any of the async command processes to terminate. | |
60 | */ | |
61 | ||
62 | /* find a free slot in the running commands table */ | |
63 | static int get_free_cmdtab_slot(); | |
64 | ||
65 | /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ | |
66 | ||
67 | static clock_t tps; | |
68 | ||
69 | /* We hold stdout & stderr child process information in two element arrays | |
70 | * indexed as follows. | |
71 | */ | |
72 | #define OUT 0 | |
73 | #define ERR 1 | |
74 | ||
75 | static struct | |
76 | { | |
77 | int pid; /* on win32, a real process handle */ | |
78 | int fd[ 2 ]; /* file descriptors for stdout and stderr */ | |
79 | FILE * stream[ 2 ]; /* child's stdout and stderr file streams */ | |
80 | clock_t start_time; /* start time of child process */ | |
81 | int exit_reason; /* termination status */ | |
82 | char * buffer[ 2 ]; /* buffers to hold stdout and stderr, if any */ | |
83 | int buf_size[ 2 ]; /* buffer sizes in bytes */ | |
84 | timestamp start_dt; /* start of command timestamp */ | |
85 | ||
86 | /* Function called when the command completes. */ | |
87 | ExecCmdCallback func; | |
88 | ||
89 | /* Opaque data passed back to the 'func' callback. */ | |
90 | void * closure; | |
b32b8144 FG |
91 | } * cmdtab = NULL; |
92 | static int cmdtab_size = 0; | |
7c673cae | 93 | |
b32b8144 FG |
94 | /* Contains both stdin and stdout of all processes. |
95 | * The length is either globs.jobs or globs.jobs * 2 | |
96 | * depending on globs.pipe_action. | |
97 | */ | |
98 | struct pollfd * wait_fds = NULL; | |
99 | #define WAIT_FDS_SIZE ( globs.jobs * ( globs.pipe_action ? 2 : 1 ) ) | |
100 | #define GET_WAIT_FD( job_idx ) ( wait_fds + ( ( job_idx * ( globs.pipe_action ? 2 : 1 ) ) ) ) | |
101 | ||
102 | /* | |
103 | * exec_init() - global initialization | |
104 | */ | |
105 | void exec_init( void ) | |
106 | { | |
107 | int i; | |
108 | if ( globs.jobs > cmdtab_size ) | |
109 | { | |
110 | cmdtab = BJAM_REALLOC( cmdtab, globs.jobs * sizeof( *cmdtab ) ); | |
111 | memset( cmdtab + cmdtab_size, 0, ( globs.jobs - cmdtab_size ) * sizeof( *cmdtab ) ); | |
112 | wait_fds = BJAM_REALLOC( wait_fds, WAIT_FDS_SIZE * sizeof ( *wait_fds ) ); | |
113 | for ( i = cmdtab_size; i < globs.jobs; ++i ) | |
114 | { | |
115 | GET_WAIT_FD( i )[ OUT ].fd = -1; | |
116 | GET_WAIT_FD( i )[ OUT ].events = POLLIN; | |
117 | if ( globs.pipe_action ) | |
118 | { | |
119 | GET_WAIT_FD( i )[ ERR ].fd = -1; | |
120 | GET_WAIT_FD( i )[ ERR ].events = POLLIN; | |
121 | } | |
122 | } | |
123 | cmdtab_size = globs.jobs; | |
124 | } | |
125 | } | |
126 | ||
127 | void exec_done( void ) | |
128 | { | |
129 | BJAM_FREE( cmdtab ); | |
130 | BJAM_FREE( wait_fds ); | |
131 | } | |
7c673cae FG |
132 | |
133 | /* | |
134 | * exec_check() - preprocess and validate the command. | |
135 | */ | |
136 | ||
137 | int exec_check | |
138 | ( | |
139 | string const * command, | |
140 | LIST * * pShell, | |
141 | int * error_length, | |
142 | int * error_max_length | |
143 | ) | |
144 | { | |
145 | int const is_raw_cmd = is_raw_command_request( *pShell ); | |
146 | ||
147 | /* We allow empty commands for non-default shells since we do not really | |
148 | * know what they are going to do with such commands. | |
149 | */ | |
150 | if ( !command->size && ( is_raw_cmd || list_empty( *pShell ) ) ) | |
151 | return EXEC_CHECK_NOOP; | |
152 | ||
153 | return is_raw_cmd | |
154 | ? EXEC_CHECK_OK | |
155 | : check_cmd_for_too_long_lines( command->value, MAXLINE, error_length, | |
156 | error_max_length ); | |
157 | } | |
158 | ||
159 | ||
160 | /* | |
161 | * exec_cmd() - launch an async command execution. | |
162 | */ | |
163 | ||
164 | /* We hold file descriptors for pipes used to communicate with child processes | |
165 | * in two element arrays indexed as follows. | |
166 | */ | |
167 | #define EXECCMD_PIPE_READ 0 | |
168 | #define EXECCMD_PIPE_WRITE 1 | |
169 | ||
170 | void exec_cmd | |
171 | ( | |
172 | string const * command, | |
173 | ExecCmdCallback func, | |
174 | void * closure, | |
175 | LIST * shell | |
176 | ) | |
177 | { | |
178 | struct sigaction ignore, saveintr, savequit; | |
179 | sigset_t chldmask, savemask; | |
180 | ||
181 | int const slot = get_free_cmdtab_slot(); | |
182 | int out[ 2 ]; | |
183 | int err[ 2 ]; | |
184 | int len; | |
185 | char const * argv[ MAXARGC + 1 ]; /* +1 for NULL */ | |
186 | ||
187 | /* Initialize default shell. */ | |
188 | static LIST * default_shell; | |
189 | if ( !default_shell ) | |
190 | default_shell = list_push_back( list_new( | |
191 | object_new( "/bin/sh" ) ), | |
192 | object_new( "-c" ) ); | |
193 | ||
194 | if ( list_empty( shell ) ) | |
195 | shell = default_shell; | |
196 | ||
197 | /* Forumulate argv. If shell was defined, be prepared for % and ! subs. | |
198 | * Otherwise, use stock /bin/sh. | |
199 | */ | |
200 | argv_from_shell( argv, shell, command->value, slot ); | |
201 | ||
202 | if ( DEBUG_EXECCMD ) | |
203 | { | |
204 | int i; | |
205 | out_printf( "Using shell: " ); | |
206 | list_print( shell ); | |
207 | out_printf( "\n" ); | |
208 | for ( i = 0; argv[ i ]; ++i ) | |
209 | out_printf( " argv[%d] = '%s'\n", i, argv[ i ] ); | |
210 | } | |
211 | ||
212 | /* Create pipes for collecting child output. */ | |
213 | if ( pipe( out ) < 0 || ( globs.pipe_action && pipe( err ) < 0 ) ) | |
214 | { | |
215 | perror( "pipe" ); | |
216 | exit( EXITBAD ); | |
217 | } | |
218 | ||
219 | /* Start the command */ | |
220 | ||
221 | timestamp_current( &cmdtab[ slot ].start_dt ); | |
222 | ||
223 | if ( 0 < globs.timeout ) | |
224 | { | |
225 | /* Handle hung processes by manually tracking elapsed time and signal | |
226 | * process when time limit expires. | |
227 | */ | |
228 | struct tms buf; | |
229 | cmdtab[ slot ].start_time = times( &buf ); | |
230 | ||
231 | /* Make a global, only do this once. */ | |
232 | if ( !tps ) tps = sysconf( _SC_CLK_TCK ); | |
233 | } | |
234 | ||
235 | /* Child does not need the read pipe ends used by the parent. */ | |
236 | fcntl( out[ EXECCMD_PIPE_READ ], F_SETFD, FD_CLOEXEC ); | |
237 | if ( globs.pipe_action ) | |
238 | fcntl( err[ EXECCMD_PIPE_READ ], F_SETFD, FD_CLOEXEC ); | |
239 | ||
240 | /* ignore SIGINT and SIGQUIT */ | |
241 | ignore.sa_handler = SIG_IGN; | |
242 | sigemptyset(&ignore.sa_mask); | |
243 | ignore.sa_flags = 0; | |
244 | if (sigaction(SIGINT, &ignore, &saveintr) < 0) | |
245 | return; | |
246 | if (sigaction(SIGQUIT, &ignore, &savequit) < 0) | |
247 | return; | |
248 | ||
249 | /* block SIGCHLD */ | |
250 | sigemptyset(&chldmask); | |
251 | sigaddset(&chldmask, SIGCHLD); | |
252 | if (sigprocmask(SIG_BLOCK, &chldmask, &savemask) < 0) | |
253 | return; | |
254 | ||
255 | if ( ( cmdtab[ slot ].pid = vfork() ) == -1 ) | |
256 | { | |
257 | perror( "vfork" ); | |
258 | exit( EXITBAD ); | |
259 | } | |
260 | ||
261 | if ( cmdtab[ slot ].pid == 0 ) | |
262 | { | |
263 | /*****************/ | |
264 | /* Child process */ | |
265 | /*****************/ | |
266 | int const pid = getpid(); | |
267 | ||
268 | /* restore previous signals */ | |
269 | sigaction(SIGINT, &saveintr, NULL); | |
270 | sigaction(SIGQUIT, &savequit, NULL); | |
271 | sigprocmask(SIG_SETMASK, &savemask, NULL); | |
272 | ||
273 | /* Redirect stdout and stderr to pipes inherited from the parent. */ | |
274 | dup2( out[ EXECCMD_PIPE_WRITE ], STDOUT_FILENO ); | |
275 | dup2( globs.pipe_action ? err[ EXECCMD_PIPE_WRITE ] : | |
276 | out[ EXECCMD_PIPE_WRITE ], STDERR_FILENO ); | |
277 | close( out[ EXECCMD_PIPE_WRITE ] ); | |
278 | if ( globs.pipe_action ) | |
279 | close( err[ EXECCMD_PIPE_WRITE ] ); | |
280 | ||
281 | /* Make this process a process group leader so that when we kill it, all | |
282 | * child processes of this process are terminated as well. We use | |
283 | * killpg( pid, SIGKILL ) to kill the process group leader and all its | |
284 | * children. | |
285 | */ | |
286 | if ( 0 < globs.timeout ) | |
287 | { | |
288 | struct rlimit r_limit; | |
289 | r_limit.rlim_cur = globs.timeout; | |
290 | r_limit.rlim_max = globs.timeout; | |
291 | setrlimit( RLIMIT_CPU, &r_limit ); | |
292 | } | |
293 | if (0 != setpgid( pid, pid )) { | |
294 | perror("setpgid(child)"); | |
295 | /* exit( EXITBAD ); */ | |
296 | } | |
297 | execvp( argv[ 0 ], (char * *)argv ); | |
298 | perror( "execvp" ); | |
299 | _exit( 127 ); | |
300 | } | |
301 | ||
302 | /******************/ | |
303 | /* Parent process */ | |
304 | /******************/ | |
305 | ||
306 | /* redundant call, ignore return value */ | |
307 | setpgid(cmdtab[ slot ].pid, cmdtab[ slot ].pid); | |
308 | ||
309 | /* Parent not need the write pipe ends used by the child. */ | |
310 | close( out[ EXECCMD_PIPE_WRITE ] ); | |
311 | if ( globs.pipe_action ) | |
312 | close( err[ EXECCMD_PIPE_WRITE ] ); | |
313 | ||
314 | /* Set both pipe read file descriptors to non-blocking. */ | |
315 | fcntl( out[ EXECCMD_PIPE_READ ], F_SETFL, O_NONBLOCK ); | |
316 | if ( globs.pipe_action ) | |
317 | fcntl( err[ EXECCMD_PIPE_READ ], F_SETFL, O_NONBLOCK ); | |
318 | ||
319 | /* Parent reads from out[ EXECCMD_PIPE_READ ]. */ | |
320 | cmdtab[ slot ].fd[ OUT ] = out[ EXECCMD_PIPE_READ ]; | |
321 | cmdtab[ slot ].stream[ OUT ] = fdopen( cmdtab[ slot ].fd[ OUT ], "rb" ); | |
322 | if ( !cmdtab[ slot ].stream[ OUT ] ) | |
323 | { | |
324 | perror( "fdopen" ); | |
325 | exit( EXITBAD ); | |
326 | } | |
327 | ||
328 | /* Parent reads from err[ EXECCMD_PIPE_READ ]. */ | |
329 | if ( globs.pipe_action ) | |
330 | { | |
331 | cmdtab[ slot ].fd[ ERR ] = err[ EXECCMD_PIPE_READ ]; | |
332 | cmdtab[ slot ].stream[ ERR ] = fdopen( cmdtab[ slot ].fd[ ERR ], "rb" ); | |
333 | if ( !cmdtab[ slot ].stream[ ERR ] ) | |
334 | { | |
335 | perror( "fdopen" ); | |
336 | exit( EXITBAD ); | |
337 | } | |
338 | } | |
339 | ||
b32b8144 FG |
340 | GET_WAIT_FD( slot )[ OUT ].fd = out[ EXECCMD_PIPE_READ ]; |
341 | if ( globs.pipe_action ) | |
342 | GET_WAIT_FD( slot )[ ERR ].fd = err[ EXECCMD_PIPE_READ ]; | |
343 | ||
7c673cae FG |
344 | /* Save input data into the selected running commands table slot. */ |
345 | cmdtab[ slot ].func = func; | |
346 | cmdtab[ slot ].closure = closure; | |
347 | ||
348 | /* restore previous signals */ | |
349 | sigaction(SIGINT, &saveintr, NULL); | |
350 | sigaction(SIGQUIT, &savequit, NULL); | |
351 | sigprocmask(SIG_SETMASK, &savemask, NULL); | |
352 | } | |
353 | ||
354 | #undef EXECCMD_PIPE_READ | |
355 | #undef EXECCMD_PIPE_WRITE | |
356 | ||
357 | ||
358 | /* Returns 1 if file descriptor is closed, or 0 if it is still alive. | |
359 | * | |
360 | * i is index into cmdtab | |
361 | * | |
362 | * s (stream) indexes: | |
363 | * - cmdtab[ i ].stream[ s ] | |
364 | * - cmdtab[ i ].buffer[ s ] | |
365 | * - cmdtab[ i ].fd [ s ] | |
366 | */ | |
367 | ||
368 | static int read_descriptor( int i, int s ) | |
369 | { | |
370 | int ret; | |
371 | char buffer[ BUFSIZ ]; | |
372 | ||
373 | while ( 0 < ( ret = fread( buffer, sizeof( char ), BUFSIZ - 1, | |
374 | cmdtab[ i ].stream[ s ] ) ) ) | |
375 | { | |
376 | buffer[ ret ] = 0; | |
377 | if ( !cmdtab[ i ].buffer[ s ] ) | |
378 | { | |
379 | /* Never been allocated. */ | |
380 | if ( globs.max_buf && ret > globs.max_buf ) | |
381 | { | |
382 | ret = globs.max_buf; | |
383 | buffer[ ret ] = 0; | |
384 | } | |
385 | cmdtab[ i ].buf_size[ s ] = ret + 1; | |
386 | cmdtab[ i ].buffer[ s ] = (char*)BJAM_MALLOC_ATOMIC( ret + 1 ); | |
387 | memcpy( cmdtab[ i ].buffer[ s ], buffer, ret + 1 ); | |
388 | } | |
389 | else | |
390 | { | |
391 | /* Previously allocated. */ | |
392 | if ( cmdtab[ i ].buf_size[ s ] < globs.max_buf || !globs.max_buf ) | |
393 | { | |
394 | char * tmp = cmdtab[ i ].buffer[ s ]; | |
395 | int const old_len = cmdtab[ i ].buf_size[ s ] - 1; | |
396 | int const new_len = old_len + ret + 1; | |
397 | cmdtab[ i ].buf_size[ s ] = new_len; | |
398 | cmdtab[ i ].buffer[ s ] = (char*)BJAM_MALLOC_ATOMIC( new_len ); | |
399 | memcpy( cmdtab[ i ].buffer[ s ], tmp, old_len ); | |
400 | memcpy( cmdtab[ i ].buffer[ s ] + old_len, buffer, ret + 1 ); | |
401 | BJAM_FREE( tmp ); | |
402 | } | |
403 | } | |
404 | } | |
405 | ||
406 | /* If buffer full, ensure last buffer char is newline so that jam log | |
407 | * contains the command status at beginning of it own line instead of | |
408 | * appended to end of the previous output. | |
409 | */ | |
410 | if ( globs.max_buf && globs.max_buf <= cmdtab[ i ].buf_size[ s ] ) | |
411 | cmdtab[ i ].buffer[ s ][ cmdtab[ i ].buf_size[ s ] - 2 ] = '\n'; | |
412 | ||
413 | return feof( cmdtab[ i ].stream[ s ] ); | |
414 | } | |
415 | ||
416 | ||
417 | /* | |
418 | * close_streams() - Close the stream and pipe descriptor. | |
419 | */ | |
420 | ||
421 | static void close_streams( int const i, int const s ) | |
422 | { | |
423 | fclose( cmdtab[ i ].stream[ s ] ); | |
424 | cmdtab[ i ].stream[ s ] = 0; | |
425 | ||
426 | close( cmdtab[ i ].fd[ s ] ); | |
427 | cmdtab[ i ].fd[ s ] = 0; | |
7c673cae | 428 | |
b32b8144 | 429 | GET_WAIT_FD( i )[ s ].fd = -1; |
7c673cae FG |
430 | } |
431 | ||
432 | ||
433 | /* | |
434 | * exec_wait() - wait for any of the async command processes to terminate. | |
435 | * | |
436 | * May register more than one terminated child process but will exit as soon as | |
437 | * at least one has been registered. | |
438 | */ | |
439 | ||
440 | void exec_wait() | |
441 | { | |
442 | int finished = 0; | |
443 | ||
444 | /* Process children that signaled. */ | |
445 | while ( !finished ) | |
446 | { | |
447 | int i; | |
448 | struct timeval tv; | |
449 | struct timeval * ptv = NULL; | |
450 | int select_timeout = globs.timeout; | |
451 | ||
7c673cae FG |
452 | /* Check for timeouts: |
453 | * - kill children that already timed out | |
454 | * - decide how long until the next one times out | |
455 | */ | |
456 | if ( globs.timeout > 0 ) | |
457 | { | |
458 | struct tms buf; | |
459 | clock_t const current = times( &buf ); | |
460 | for ( i = 0; i < globs.jobs; ++i ) | |
461 | if ( cmdtab[ i ].pid ) | |
462 | { | |
463 | clock_t const consumed = | |
464 | ( current - cmdtab[ i ].start_time ) / tps; | |
465 | if ( consumed >= globs.timeout ) | |
466 | { | |
467 | killpg( cmdtab[ i ].pid, SIGKILL ); | |
468 | cmdtab[ i ].exit_reason = EXIT_TIMEOUT; | |
469 | } | |
470 | else if ( globs.timeout - consumed < select_timeout ) | |
471 | select_timeout = globs.timeout - consumed; | |
472 | } | |
473 | ||
474 | /* If nothing else causes our select() call to exit, force it after | |
475 | * however long it takes for the next one of our child processes to | |
476 | * crossed its alloted processing time so we can terminate it. | |
477 | */ | |
478 | tv.tv_sec = select_timeout; | |
479 | tv.tv_usec = 0; | |
480 | ptv = &tv; | |
481 | } | |
482 | ||
483 | /* select() will wait for I/O on a descriptor, a signal, or timeout. */ | |
484 | { | |
485 | /* disable child termination signals while in select */ | |
486 | int ret; | |
487 | sigset_t sigmask; | |
488 | sigemptyset(&sigmask); | |
489 | sigaddset(&sigmask, SIGCHLD); | |
490 | sigprocmask(SIG_BLOCK, &sigmask, NULL); | |
b32b8144 | 491 | while ( ( ret = poll( wait_fds, WAIT_FDS_SIZE, select_timeout * 1000 ) ) == -1 ) |
7c673cae FG |
492 | if ( errno != EINTR ) |
493 | break; | |
494 | /* restore original signal mask by unblocking sigchld */ | |
495 | sigprocmask(SIG_UNBLOCK, &sigmask, NULL); | |
496 | if ( ret <= 0 ) | |
497 | continue; | |
498 | } | |
499 | ||
500 | for ( i = 0; i < globs.jobs; ++i ) | |
501 | { | |
502 | int out_done = 0; | |
503 | int err_done = 0; | |
b32b8144 | 504 | if ( GET_WAIT_FD( i )[ OUT ].revents ) |
7c673cae FG |
505 | out_done = read_descriptor( i, OUT ); |
506 | ||
b32b8144 | 507 | if ( globs.pipe_action && ( GET_WAIT_FD( i )[ ERR ].revents ) ) |
7c673cae FG |
508 | err_done = read_descriptor( i, ERR ); |
509 | ||
510 | /* If feof on either descriptor, we are done. */ | |
511 | if ( out_done || err_done ) | |
512 | { | |
513 | int pid; | |
514 | int status; | |
515 | int rstat; | |
516 | timing_info time_info; | |
517 | struct rusage cmd_usage; | |
518 | ||
519 | /* We found a terminated child process - our search is done. */ | |
520 | finished = 1; | |
521 | ||
522 | /* Close the stream and pipe descriptors. */ | |
523 | close_streams( i, OUT ); | |
524 | if ( globs.pipe_action ) | |
525 | close_streams( i, ERR ); | |
526 | ||
527 | /* Reap the child and release resources. */ | |
528 | while ( ( pid = wait4( cmdtab[ i ].pid, &status, 0, &cmd_usage ) ) == -1 ) | |
529 | if ( errno != EINTR ) | |
530 | break; | |
531 | if ( pid != cmdtab[ i ].pid ) | |
532 | { | |
533 | err_printf( "unknown pid %d with errno = %d\n", pid, errno ); | |
534 | exit( EXITBAD ); | |
535 | } | |
536 | ||
537 | /* Set reason for exit if not timed out. */ | |
538 | if ( WIFEXITED( status ) ) | |
539 | cmdtab[ i ].exit_reason = WEXITSTATUS( status ) | |
540 | ? EXIT_FAIL | |
541 | : EXIT_OK; | |
542 | ||
543 | { | |
544 | time_info.system = ((double)(cmd_usage.ru_stime.tv_sec)*1000000.0+(double)(cmd_usage.ru_stime.tv_usec))/1000000.0; | |
545 | time_info.user = ((double)(cmd_usage.ru_utime.tv_sec)*1000000.0+(double)(cmd_usage.ru_utime.tv_usec))/1000000.0; | |
546 | timestamp_copy( &time_info.start, &cmdtab[ i ].start_dt ); | |
547 | timestamp_current( &time_info.end ); | |
548 | } | |
549 | ||
550 | /* Drive the completion. */ | |
551 | if ( interrupted() ) | |
552 | rstat = EXEC_CMD_INTR; | |
553 | else if ( status ) | |
554 | rstat = EXEC_CMD_FAIL; | |
555 | else | |
556 | rstat = EXEC_CMD_OK; | |
557 | ||
558 | /* Call the callback, may call back to jam rule land. */ | |
559 | (*cmdtab[ i ].func)( cmdtab[ i ].closure, rstat, &time_info, | |
560 | cmdtab[ i ].buffer[ OUT ], cmdtab[ i ].buffer[ ERR ], | |
561 | cmdtab[ i ].exit_reason ); | |
562 | ||
563 | /* Clean up the command's running commands table slot. */ | |
564 | BJAM_FREE( cmdtab[ i ].buffer[ OUT ] ); | |
565 | cmdtab[ i ].buffer[ OUT ] = 0; | |
566 | cmdtab[ i ].buf_size[ OUT ] = 0; | |
567 | ||
568 | BJAM_FREE( cmdtab[ i ].buffer[ ERR ] ); | |
569 | cmdtab[ i ].buffer[ ERR ] = 0; | |
570 | cmdtab[ i ].buf_size[ ERR ] = 0; | |
571 | ||
572 | cmdtab[ i ].pid = 0; | |
573 | cmdtab[ i ].func = 0; | |
574 | cmdtab[ i ].closure = 0; | |
575 | cmdtab[ i ].start_time = 0; | |
576 | } | |
577 | } | |
578 | } | |
579 | } | |
580 | ||
581 | ||
582 | /* | |
583 | * Find a free slot in the running commands table. | |
584 | */ | |
585 | ||
586 | static int get_free_cmdtab_slot() | |
587 | { | |
588 | int slot; | |
b32b8144 | 589 | for ( slot = 0; slot < globs.jobs; ++slot ) |
7c673cae FG |
590 | if ( !cmdtab[ slot ].pid ) |
591 | return slot; | |
592 | err_printf( "no slots for child!\n" ); | |
593 | exit( EXITBAD ); | |
594 | } | |
595 | ||
596 | # endif /* USE_EXECUNIX */ |