main.c revision 140870
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1988, 1989, 1990, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * Copyright (c) 1989 by Berkeley Softworks 51590Srgrimes * All rights reserved. 61590Srgrimes * 71590Srgrimes * This code is derived from software contributed to Berkeley by 81590Srgrimes * Adam de Boor. 91590Srgrimes * 101590Srgrimes * Redistribution and use in source and binary forms, with or without 111590Srgrimes * modification, are permitted provided that the following conditions 121590Srgrimes * are met: 131590Srgrimes * 1. Redistributions of source code must retain the above copyright 141590Srgrimes * notice, this list of conditions and the following disclaimer. 151590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161590Srgrimes * notice, this list of conditions and the following disclaimer in the 171590Srgrimes * documentation and/or other materials provided with the distribution. 181590Srgrimes * 3. All advertising materials mentioning features or use of this software 191590Srgrimes * must display the following acknowledgement: 201590Srgrimes * This product includes software developed by the University of 211590Srgrimes * California, Berkeley and its contributors. 221590Srgrimes * 4. Neither the name of the University nor the names of its contributors 231590Srgrimes * may be used to endorse or promote products derived from this software 241590Srgrimes * without specific prior written permission. 251590Srgrimes * 261590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 271590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 281590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 291590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 301590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 311590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 321590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 331590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 341590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 351590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 361590Srgrimes * SUCH DAMAGE. 3762833Swsanchez * 3862833Swsanchez * @(#)main.c 8.3 (Berkeley) 3/19/94 391590Srgrimes */ 401590Srgrimes 411590Srgrimes#ifndef lint 4294595Sobrien#if 0 4394589Sobrienstatic char copyright[] = 4494589Sobrien"@(#) Copyright (c) 1988, 1989, 1990, 1993\n\ 4594589Sobrien The Regents of the University of California. All rights reserved.\n"; 4694595Sobrien#endif 471590Srgrimes#endif /* not lint */ 4894589Sobrien#include <sys/cdefs.h> 4994587Sobrien__FBSDID("$FreeBSD: head/usr.bin/make/main.c 140870 2005-01-26 18:19:39Z harti $"); 501590Srgrimes 511590Srgrimes/*- 521590Srgrimes * main.c -- 531590Srgrimes * The main file for this entire program. Exit routines etc 541590Srgrimes * reside here. 551590Srgrimes * 561590Srgrimes * Utility functions defined in this file: 571590Srgrimes * Main_ParseArgLine Takes a line of arguments, breaks them and 581590Srgrimes * treats them as if they were given when first 591590Srgrimes * invoked. Used by the parse module to implement 601590Srgrimes * the .MFLAGS target. 611590Srgrimes */ 621590Srgrimes 631590Srgrimes#include <sys/param.h> 641590Srgrimes#include <sys/signal.h> 651590Srgrimes#include <sys/stat.h> 6639006Skato#include <sys/sysctl.h> 67127880Sdes#include <sys/time.h> 68127899Sru#include <sys/resource.h> 6918730Ssteve#ifndef MACHINE 705814Sjkh#include <sys/utsname.h> 7118730Ssteve#endif 7218730Ssteve#include <sys/wait.h> 73127880Sdes 7427644Scharnier#include <err.h> 751590Srgrimes#include <errno.h> 761590Srgrimes#include <fcntl.h> 77127880Sdes#include <signal.h> 78127880Sdes#include <stdarg.h> 791590Srgrimes#include <stdio.h> 80127880Sdes#include <stdlib.h> 8149331Shoek#include <sysexits.h> 8263955Simp#include <unistd.h> 83127880Sdes 841590Srgrimes#include "make.h" 851590Srgrimes#include "hash.h" 861590Srgrimes#include "dir.h" 871590Srgrimes#include "job.h" 881590Srgrimes#include "pathnames.h" 891590Srgrimes 90104395Sjmallett#define WANT_ENV_MKLVL 1 91138071Sjmallett#define MKLVL_MAXVAL 500 92138071Sjmallett#define MKLVL_ENVVAR "__MKLVL__" 93104395Sjmallett 941590Srgrimes#define MAKEFLAGS ".MAKEFLAGS" 951590Srgrimes 96138916Sharti/* Targets to be made */ 97138916ShartiLst create = Lst_Initializer(create); 98138916Sharti 991590Srgrimestime_t now; /* Time at start of make */ 1001590SrgrimesGNode *DEFAULT; /* .DEFAULT node */ 1011590SrgrimesBoolean allPrecious; /* .PRECIOUS given on line by itself */ 1021590Srgrimes 1031590Srgrimesstatic Boolean noBuiltins; /* -r flag */ 104138916Sharti 105138916Sharti/* ordered list of makefiles to read */ 106138916Shartistatic Lst makefiles = Lst_Initializer(makefiles); 107138916Sharti 10866365Speterstatic Boolean expandVars; /* fully expand printed variables */ 109138916Sharti 110138916Sharti/* list of variables to print */ 111138916Shartistatic Lst variables = Lst_Initializer(variables); 112138916Sharti 11318730Ssteveint maxJobs; /* -j argument */ 11428228Sfsmpstatic Boolean forceJobs; /* -j argument given */ 1151590SrgrimesBoolean compatMake; /* -B argument */ 1161590SrgrimesBoolean debug; /* -d flag */ 1171590SrgrimesBoolean noExecute; /* -n flag */ 1181590SrgrimesBoolean keepgoing; /* -k flag */ 1191590SrgrimesBoolean queryFlag; /* -q flag */ 1201590SrgrimesBoolean touchFlag; /* -t flag */ 1211590SrgrimesBoolean usePipes; /* !-P flag */ 1221590SrgrimesBoolean ignoreErrors; /* -i flag */ 1231590SrgrimesBoolean beSilent; /* -s flag */ 12441151SdgBoolean beVerbose; /* -v flag */ 1251590SrgrimesBoolean oldVars; /* variable substitution style */ 1261590SrgrimesBoolean checkEnvFirst; /* -e flag */ 127138916Sharti 128138916Sharti/* (-E) vars to override from env */ 129138916ShartiLst envFirstVars = Lst_Initializer(envFirstVars); 130138916Sharti 131104818SjmallettBoolean jobsRunning; /* TRUE if the jobs might be running */ 1321590Srgrimes 13392921Simpstatic void MainParseArgs(int, char **); 13492921Simpchar * chdir_verify_path(char *, char *); 135138561Shartistatic int ReadMakefile(const void *, const void *); 13692921Simpstatic void usage(void); 1371590Srgrimes 1381590Srgrimesstatic char *curdir; /* startup directory */ 1391590Srgrimesstatic char *objdir; /* where we chdir'ed to */ 1401590Srgrimes 141133085Sharti/* 142133085Sharti * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 143133085Sharti */ 144133085Shartistatic void 145133085ShartiMFLAGS_append(char *flag, char *arg) 146133085Sharti{ 147140870Sharti char *str; 148138232Sharti 149133085Sharti Var_Append(MAKEFLAGS, flag, VAR_GLOBAL); 150140870Sharti if (arg != NULL) { 151140870Sharti str = MAKEFLAGS_quote(arg); 152140870Sharti Var_Append(MAKEFLAGS, str, VAR_GLOBAL); 153140870Sharti free(str); 154140870Sharti } 155133085Sharti 156133085Sharti Var_Append("MFLAGS", flag, VAR_GLOBAL); 157140870Sharti if (arg != NULL) { 158140870Sharti str = MAKEFLAGS_quote(arg); 159140870Sharti Var_Append("MFLAGS", str, VAR_GLOBAL); 160140870Sharti free(str); 161140870Sharti } 162133085Sharti} 163133085Sharti 1641590Srgrimes/*- 1651590Srgrimes * MainParseArgs -- 1661590Srgrimes * Parse a given argument vector. Called from main() and from 1671590Srgrimes * Main_ParseArgLine() when the .MAKEFLAGS target is used. 1681590Srgrimes * 1691590Srgrimes * XXX: Deal with command line overriding .MAKEFLAGS in makefile 1701590Srgrimes * 1711590Srgrimes * Results: 1721590Srgrimes * None 1731590Srgrimes * 1741590Srgrimes * Side Effects: 1751590Srgrimes * Various global and local flags will be set depending on the flags 1761590Srgrimes * given 1771590Srgrimes */ 1781590Srgrimesstatic void 179104696SjmallettMainParseArgs(int argc, char **argv) 1801590Srgrimes{ 1815814Sjkh int c; 1821590Srgrimes 1831590Srgrimes optind = 1; /* since we're called more than once */ 184137202Sharti#define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" 18524360Simprearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 1861590Srgrimes switch(c) { 187102393Sjmallett case 'C': 188107964Sseanc if (chdir(optarg) == -1) 189107964Sseanc err(1, "chdir %s", optarg); 190102393Sjmallett break; 1911590Srgrimes case 'D': 1921590Srgrimes Var_Set(optarg, "1", VAR_GLOBAL); 193133085Sharti MFLAGS_append("-D", optarg); 1941590Srgrimes break; 1951590Srgrimes case 'I': 1961590Srgrimes Parse_AddIncludeDir(optarg); 197133085Sharti MFLAGS_append("-I", optarg); 1981590Srgrimes break; 19917193Sbde case 'V': 200138920Sru Lst_AtEnd(&variables, estrdup(optarg)); 201133085Sharti MFLAGS_append("-V", optarg); 20217193Sbde break; 20366365Speter case 'X': 20466365Speter expandVars = FALSE; 20566365Speter break; 2061590Srgrimes case 'B': 2071590Srgrimes compatMake = TRUE; 208133085Sharti MFLAGS_append("-B", NULL); 209137626Sphk unsetenv("MAKE_JOBS_FIFO"); 2101590Srgrimes break; 2111590Srgrimes case 'P': 2121590Srgrimes usePipes = FALSE; 213133085Sharti MFLAGS_append("-P", NULL); 2141590Srgrimes break; 2151590Srgrimes case 'S': 2161590Srgrimes keepgoing = FALSE; 217133085Sharti MFLAGS_append("-S", NULL); 2181590Srgrimes break; 2191590Srgrimes case 'd': { 2201590Srgrimes char *modules = optarg; 2211590Srgrimes 2221590Srgrimes for (; *modules; ++modules) 2231590Srgrimes switch (*modules) { 2241590Srgrimes case 'A': 2251590Srgrimes debug = ~0; 2261590Srgrimes break; 2271590Srgrimes case 'a': 2281590Srgrimes debug |= DEBUG_ARCH; 2291590Srgrimes break; 2301590Srgrimes case 'c': 2311590Srgrimes debug |= DEBUG_COND; 2321590Srgrimes break; 2331590Srgrimes case 'd': 2341590Srgrimes debug |= DEBUG_DIR; 2351590Srgrimes break; 2361590Srgrimes case 'f': 2371590Srgrimes debug |= DEBUG_FOR; 2381590Srgrimes break; 2391590Srgrimes case 'g': 2401590Srgrimes if (modules[1] == '1') { 2411590Srgrimes debug |= DEBUG_GRAPH1; 2421590Srgrimes ++modules; 2431590Srgrimes } 2441590Srgrimes else if (modules[1] == '2') { 2451590Srgrimes debug |= DEBUG_GRAPH2; 2461590Srgrimes ++modules; 2471590Srgrimes } 2481590Srgrimes break; 2491590Srgrimes case 'j': 2501590Srgrimes debug |= DEBUG_JOB; 2511590Srgrimes break; 25260569Swill case 'l': 25360569Swill debug |= DEBUG_LOUD; 25460569Swill break; 2551590Srgrimes case 'm': 2561590Srgrimes debug |= DEBUG_MAKE; 2571590Srgrimes break; 2581590Srgrimes case 's': 2591590Srgrimes debug |= DEBUG_SUFF; 2601590Srgrimes break; 2611590Srgrimes case 't': 2621590Srgrimes debug |= DEBUG_TARG; 2631590Srgrimes break; 2641590Srgrimes case 'v': 2651590Srgrimes debug |= DEBUG_VAR; 2661590Srgrimes break; 2671590Srgrimes default: 26827644Scharnier warnx("illegal argument to d option -- %c", *modules); 2691590Srgrimes usage(); 2701590Srgrimes } 271133085Sharti MFLAGS_append("-d", optarg); 2721590Srgrimes break; 2731590Srgrimes } 27449332Shoek case 'E': 275138920Sru Lst_AtEnd(&envFirstVars, estrdup(optarg)); 276133085Sharti MFLAGS_append("-E", optarg); 27749332Shoek break; 2781590Srgrimes case 'e': 2791590Srgrimes checkEnvFirst = TRUE; 280133085Sharti MFLAGS_append("-e", NULL); 2811590Srgrimes break; 2821590Srgrimes case 'f': 283138920Sru Lst_AtEnd(&makefiles, estrdup(optarg)); 2841590Srgrimes break; 2851590Srgrimes case 'i': 2861590Srgrimes ignoreErrors = TRUE; 287133085Sharti MFLAGS_append("-i", NULL); 2881590Srgrimes break; 28949331Shoek case 'j': { 29049331Shoek char *endptr; 29149331Shoek 29218730Ssteve forceJobs = TRUE; 29349331Shoek maxJobs = strtol(optarg, &endptr, 10); 29449331Shoek if (maxJobs <= 0 || *endptr != '\0') { 29549938Shoek warnx("illegal number, -j argument -- %s", 29649938Shoek optarg); 29749938Shoek usage(); 29849331Shoek } 299133085Sharti MFLAGS_append("-j", optarg); 3001590Srgrimes break; 30149331Shoek } 3021590Srgrimes case 'k': 3031590Srgrimes keepgoing = TRUE; 304133085Sharti MFLAGS_append("-k", NULL); 3051590Srgrimes break; 30618730Ssteve case 'm': 307138916Sharti Dir_AddDir(&sysIncPath, optarg); 308133085Sharti MFLAGS_append("-m", optarg); 30918730Ssteve break; 3101590Srgrimes case 'n': 3111590Srgrimes noExecute = TRUE; 312133085Sharti MFLAGS_append("-n", NULL); 3131590Srgrimes break; 3141590Srgrimes case 'q': 3151590Srgrimes queryFlag = TRUE; 3161590Srgrimes /* Kind of nonsensical, wot? */ 317133085Sharti MFLAGS_append("-q", NULL); 3181590Srgrimes break; 3191590Srgrimes case 'r': 3201590Srgrimes noBuiltins = TRUE; 321133085Sharti MFLAGS_append("-r", NULL); 3221590Srgrimes break; 3231590Srgrimes case 's': 3241590Srgrimes beSilent = TRUE; 325133085Sharti MFLAGS_append("-s", NULL); 3261590Srgrimes break; 3271590Srgrimes case 't': 3281590Srgrimes touchFlag = TRUE; 329133085Sharti MFLAGS_append("-t", NULL); 3301590Srgrimes break; 33141151Sdg case 'v': 33241151Sdg beVerbose = TRUE; 333133085Sharti MFLAGS_append("-v", NULL); 33441151Sdg break; 3351590Srgrimes default: 3361590Srgrimes case '?': 3371590Srgrimes usage(); 3381590Srgrimes } 3391590Srgrimes } 3401590Srgrimes 3411590Srgrimes oldVars = TRUE; 3421590Srgrimes 3431590Srgrimes /* 3441590Srgrimes * See if the rest of the arguments are variable assignments and 3451590Srgrimes * perform them if so. Else take them to be targets and stuff them 3461590Srgrimes * on the end of the "create" list. 3471590Srgrimes */ 3481590Srgrimes for (argv += optind, argc -= optind; *argv; ++argv, --argc) 349133562Sharti if (Parse_IsVar(*argv)) { 350140870Sharti char *ptr = MAKEFLAGS_quote(*argv); 351133562Sharti 352133562Sharti Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL); 353133562Sharti free(ptr); 354133562Sharti 3551590Srgrimes Parse_DoVar(*argv, VAR_CMD); 356133562Sharti } else { 3571590Srgrimes if (!**argv) 3581590Srgrimes Punt("illegal (null) argument."); 3591590Srgrimes if (**argv == '-') { 3601590Srgrimes if ((*argv)[1]) 3611590Srgrimes optind = 0; /* -flag... */ 3621590Srgrimes else 3631590Srgrimes optind = 1; /* - */ 3641590Srgrimes goto rearg; 3651590Srgrimes } 366138916Sharti Lst_AtEnd(&create, estrdup(*argv)); 3671590Srgrimes } 3681590Srgrimes} 3691590Srgrimes 3701590Srgrimes/*- 3711590Srgrimes * Main_ParseArgLine -- 3721590Srgrimes * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 3731590Srgrimes * is encountered and by main() when reading the .MAKEFLAGS envariable. 3741590Srgrimes * Takes a line of arguments and breaks it into its 3751590Srgrimes * component words and passes those words and the number of them to the 3761590Srgrimes * MainParseArgs function. 3771590Srgrimes * The line should have all its leading whitespace removed. 3781590Srgrimes * 3791590Srgrimes * Results: 3801590Srgrimes * None 3811590Srgrimes * 3821590Srgrimes * Side Effects: 3831590Srgrimes * Only those that come from the various arguments. 3841590Srgrimes */ 3851590Srgrimesvoid 386140870ShartiMain_ParseArgLine(char *line, int mflags) 3871590Srgrimes{ 3881590Srgrimes char **argv; /* Manufactured argument vector */ 3891590Srgrimes int argc; /* Number of arguments in argv */ 3901590Srgrimes 3911590Srgrimes if (line == NULL) 3921590Srgrimes return; 3931590Srgrimes for (; *line == ' '; ++line) 3941590Srgrimes continue; 3951590Srgrimes if (!*line) 3961590Srgrimes return; 3971590Srgrimes 398140870Sharti if (mflags) 399140870Sharti argv = MAKEFLAGS_break(line, &argc); 400140870Sharti else 401140870Sharti argv = brk_string(line, &argc, TRUE); 402140870Sharti 4031590Srgrimes MainParseArgs(argc, argv); 4041590Srgrimes} 4051590Srgrimes 40618339Sswallacechar * 407104696Sjmallettchdir_verify_path(char *path, char *obpath) 40818339Sswallace{ 40918339Sswallace struct stat sb; 41018339Sswallace 41118339Sswallace if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 41275973Sru if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 41327644Scharnier warn("warning: %s", path); 414138232Sharti return (0); 41518339Sswallace } 416138232Sharti return (obpath); 41718339Sswallace } 41818339Sswallace 419138232Sharti return (0); 42018339Sswallace} 42118339Sswallace 422133082Shartistatic void 423133082Sharticatch_child(int sig __unused) 424123513Sdes{ 425123513Sdes} 42618339Sswallace 427138071Sjmallett/* 428138071Sjmallett * In lieu of a good way to prevent every possible looping in 429138071Sjmallett * make(1), stop there from being more than MKLVL_MAXVAL processes forked 430138071Sjmallett * by make(1), to prevent a forkbomb from happening, in a dumb and 431138071Sjmallett * mechanical way. 432138071Sjmallett */ 433138071Sjmallettstatic void 434138071Sjmallettcheck_make_level(void) 435138071Sjmallett{ 436138071Sjmallett#ifdef WANT_ENV_MKLVL 437138071Sjmallett char *value = getenv(MKLVL_ENVVAR); 438138071Sjmallett int level = (value == NULL) ? 0 : atoi(value); 439138071Sjmallett 440138071Sjmallett if (level < 0) { 441138071Sjmallett errc(2, EAGAIN, "Invalid value for recursion level (%d).", level); 442138071Sjmallett } else if (level > MKLVL_MAXVAL) { 443138071Sjmallett errc(2, EAGAIN, "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 444138071Sjmallett } else { 445138071Sjmallett char new_value[32]; 446138071Sjmallett sprintf(new_value, "%d", level + 1); 447138071Sjmallett setenv(MKLVL_ENVVAR, new_value, 1); 448138071Sjmallett } 449138071Sjmallett#endif /* WANT_ENV_MKLVL */ 450138071Sjmallett} 451138071Sjmallett 4521590Srgrimes/*- 4531590Srgrimes * main -- 4541590Srgrimes * The main function, for obvious reasons. Initializes variables 4551590Srgrimes * and a few modules, then parses the arguments give it in the 4561590Srgrimes * environment and on the command line. Reads the system makefile 4571590Srgrimes * followed by either Makefile, makefile or the file given by the 4581590Srgrimes * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 4591590Srgrimes * flags it has received by then uses either the Make or the Compat 4601590Srgrimes * module to create the initial list of targets. 4611590Srgrimes * 4621590Srgrimes * Results: 4631590Srgrimes * If -q was given, exits -1 if anything was out-of-date. Else it exits 4641590Srgrimes * 0. 4651590Srgrimes * 4661590Srgrimes * Side Effects: 4671590Srgrimes * The program exits when done. Targets are created. etc. etc. etc. 4681590Srgrimes */ 4691590Srgrimesint 470104696Sjmallettmain(int argc, char **argv) 4711590Srgrimes{ 4721590Srgrimes Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 47340500Sobrien struct stat sa; 47440500Sobrien char *p, *p1, *path, *pathp; 47573262Simp char mdpath[MAXPATHLEN]; 47673262Simp char obpath[MAXPATHLEN]; 47773262Simp char cdpath[MAXPATHLEN]; 4785814Sjkh char *machine = getenv("MACHINE"); 47944362Simp char *machine_arch = getenv("MACHINE_ARCH"); 48072679Skris char *machine_cpu = getenv("MACHINE_CPU"); 48118730Ssteve char *cp = NULL, *start; 48218730Ssteve /* avoid faults on read-only strings */ 48318730Ssteve static char syspath[] = _PATH_DEFSYSPATH; 4841590Srgrimes 485123513Sdes { 486123513Sdes /* 487123513Sdes * Catch SIGCHLD so that we get kicked out of select() when we 488123513Sdes * need to look at a child. This is only known to matter for the 489123513Sdes * -j case (perhaps without -P). 490123513Sdes * 491123513Sdes * XXX this is intentionally misplaced. 492123513Sdes */ 493123513Sdes struct sigaction sa; 494123513Sdes 495123513Sdes sigemptyset(&sa.sa_mask); 496123513Sdes sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; 497123513Sdes sa.sa_handler = catch_child; 498123513Sdes sigaction(SIGCHLD, &sa, NULL); 499123513Sdes } 500123513Sdes 501138071Sjmallett check_make_level(); 502104395Sjmallett 50364739Sgreen#if DEFSHELL == 2 50464739Sgreen /* 50564739Sgreen * Turn off ENV to make ksh happier. 50664739Sgreen */ 50764739Sgreen unsetenv("ENV"); 50864739Sgreen#endif 50964739Sgreen 51018730Ssteve#ifdef RLIMIT_NOFILE 5111590Srgrimes /* 51218730Ssteve * get rid of resource limit on file descriptors 51318730Ssteve */ 51418730Ssteve { 51518730Ssteve struct rlimit rl; 51618730Ssteve if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 51718730Ssteve rl.rlim_cur != rl.rlim_max) { 51818730Ssteve rl.rlim_cur = rl.rlim_max; 519138232Sharti setrlimit(RLIMIT_NOFILE, &rl); 52018730Ssteve } 52118730Ssteve } 52218730Ssteve#endif 5231590Srgrimes 5245814Sjkh /* 52539006Skato * PC-98 kernel sets the `i386' string to the utsname.machine and 52639006Skato * it cannot be distinguished from IBM-PC by uname(3). Therefore, 52739006Skato * we check machine.ispc98 and adjust the machine variable before 52839006Skato * using usname(3) below. 52953631Smarcel * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 53053631Smarcel * __FreeBSD_version was defined as 300003. So, this check can 53153631Smarcel * safely be done with any kernel with version > 300003. 53239006Skato */ 53339006Skato if (!machine) { 53439006Skato int ispc98; 53539006Skato size_t len; 53639006Skato 53739006Skato len = sizeof(ispc98); 53839006Skato if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 53939006Skato if (ispc98) 54039006Skato machine = "pc98"; 54139006Skato } 54239006Skato } 54339006Skato 54439006Skato /* 5455814Sjkh * Get the name of this type of MACHINE from utsname 5465814Sjkh * so we can share an executable for similar machines. 5475814Sjkh * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 5485814Sjkh * 5495814Sjkh * Note that while MACHINE is decided at run-time, 5505814Sjkh * MACHINE_ARCH is always known at compile time. 5515814Sjkh */ 55218864Ssteve if (!machine) { 55318339Sswallace#ifndef MACHINE 55418730Ssteve struct utsname utsname; 55518730Ssteve 55694506Scharnier if (uname(&utsname) == -1) 55794506Scharnier err(2, "uname"); 5585814Sjkh machine = utsname.machine; 55918339Sswallace#else 56018339Sswallace machine = MACHINE; 56118339Sswallace#endif 5625814Sjkh } 5631590Srgrimes 56444362Simp if (!machine_arch) { 56544362Simp#ifndef MACHINE_ARCH 56644362Simp machine_arch = "unknown"; 56744362Simp#else 56844362Simp machine_arch = MACHINE_ARCH; 56944362Simp#endif 57044362Simp } 57144362Simp 5721590Srgrimes /* 57372679Skris * Set machine_cpu to the minumum supported CPU revision based 57472679Skris * on the target architecture, if not already set. 57572679Skris */ 57672679Skris if (!machine_cpu) { 57772679Skris if (!strcmp(machine_arch, "i386")) 57872679Skris machine_cpu = "i386"; 57972679Skris else if (!strcmp(machine_arch, "alpha")) 58072679Skris machine_cpu = "ev4"; 58172679Skris else 58272679Skris machine_cpu = "unknown"; 58372679Skris } 5841590Srgrimes 58566365Speter expandVars = TRUE; 5861590Srgrimes beSilent = FALSE; /* Print commands as executed */ 5871590Srgrimes ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 5881590Srgrimes noExecute = FALSE; /* Execute all commands */ 5891590Srgrimes keepgoing = FALSE; /* Stop on error */ 5901590Srgrimes allPrecious = FALSE; /* Remove targets when interrupted */ 5911590Srgrimes queryFlag = FALSE; /* This is not just a check-run */ 5921590Srgrimes noBuiltins = FALSE; /* Read the built-in rules */ 5931590Srgrimes touchFlag = FALSE; /* Actually update targets */ 5941590Srgrimes usePipes = TRUE; /* Catch child output in pipes */ 5951590Srgrimes debug = 0; /* No debug verbosity, please. */ 5961590Srgrimes jobsRunning = FALSE; 5971590Srgrimes 598137571Sphk maxJobs = DEFMAXJOBS; 59928228Sfsmp forceJobs = FALSE; /* No -j flag */ 60018730Ssteve compatMake = FALSE; /* No compat mode */ 6011590Srgrimes 6021590Srgrimes /* 6031590Srgrimes * Initialize the parsing, directory and variable modules to prepare 6041590Srgrimes * for the reading of inclusion paths and variable settings on the 6051590Srgrimes * command line 6061590Srgrimes */ 6071590Srgrimes Dir_Init(); /* Initialize directory structures so -I flags 6081590Srgrimes * can be processed correctly */ 6091590Srgrimes Parse_Init(); /* Need to initialize the paths of #include 6101590Srgrimes * directories */ 6111590Srgrimes Var_Init(); /* As well as the lists of variables for 6121590Srgrimes * parsing arguments */ 6135814Sjkh str_init(); 6141590Srgrimes 6151590Srgrimes /* 6161590Srgrimes * Initialize various variables. 6171590Srgrimes * MAKE also gets this name, for compatibility 6181590Srgrimes * .MAKEFLAGS gets set to the empty string just in case. 6191590Srgrimes * MFLAGS also gets initialized empty, for compatibility. 6201590Srgrimes */ 6211590Srgrimes Var_Set("MAKE", argv[0], VAR_GLOBAL); 6221590Srgrimes Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 6231590Srgrimes Var_Set("MFLAGS", "", VAR_GLOBAL); 6245814Sjkh Var_Set("MACHINE", machine, VAR_GLOBAL); 62544362Simp Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 62672679Skris Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 62797121Sru#ifdef MAKE_VERSION 62897121Sru Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 62997121Sru#endif 6301590Srgrimes 6311590Srgrimes /* 6321590Srgrimes * First snag any flags out of the MAKE environment variable. 6331590Srgrimes * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 6341590Srgrimes * in a different format). 6351590Srgrimes */ 636140870Sharti Main_ParseArgLine(getenv("MAKEFLAGS"), 1); 6378874Srgrimes 6381590Srgrimes MainParseArgs(argc, argv); 6391590Srgrimes 6401590Srgrimes /* 641120053Sru * Find where we are... 642120053Sru * All this code is so that we know where we are when we start up 643120053Sru * on a different machine with pmake. 644120053Sru */ 645120053Sru curdir = cdpath; 646120053Sru if (getcwd(curdir, MAXPATHLEN) == NULL) 647120053Sru err(2, NULL); 648120053Sru 649120053Sru if (stat(curdir, &sa) == -1) 650120053Sru err(2, "%s", curdir); 651120053Sru 652120053Sru /* 653120053Sru * The object directory location is determined using the 654120053Sru * following order of preference: 655120053Sru * 656120053Sru * 1. MAKEOBJDIRPREFIX`cwd` 657120053Sru * 2. MAKEOBJDIR 658120053Sru * 3. _PATH_OBJDIR.${MACHINE} 659120053Sru * 4. _PATH_OBJDIR 660120053Sru * 5. _PATH_OBJDIRPREFIX`cwd` 661120053Sru * 662120053Sru * If one of the first two fails, use the current directory. 663120053Sru * If the remaining three all fail, use the current directory. 664120053Sru * 665120053Sru * Once things are initted, 666120053Sru * have to add the original directory to the search path, 667120053Sru * and modify the paths for the Makefiles apropriately. The 668120053Sru * current directory is also placed as a variable for make scripts. 669120053Sru */ 670120053Sru if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 671120053Sru if (!(path = getenv("MAKEOBJDIR"))) { 672120053Sru path = _PATH_OBJDIR; 673120053Sru pathp = _PATH_OBJDIRPREFIX; 674138232Sharti snprintf(mdpath, MAXPATHLEN, "%s.%s", 675120053Sru path, machine); 676120053Sru if (!(objdir = chdir_verify_path(mdpath, obpath))) 677120053Sru if (!(objdir=chdir_verify_path(path, obpath))) { 678138232Sharti snprintf(mdpath, MAXPATHLEN, 679120053Sru "%s%s", pathp, curdir); 680120053Sru if (!(objdir=chdir_verify_path(mdpath, 681120053Sru obpath))) 682120053Sru objdir = curdir; 683120053Sru } 684120053Sru } 685120053Sru else if (!(objdir = chdir_verify_path(path, obpath))) 686120053Sru objdir = curdir; 687120053Sru } 688120053Sru else { 689138232Sharti snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 690120053Sru if (!(objdir = chdir_verify_path(mdpath, obpath))) 691120053Sru objdir = curdir; 692120053Sru } 693120053Sru Dir_InitDot(); /* Initialize the "." directory */ 694120053Sru if (objdir != curdir) 695138916Sharti Dir_AddDir(&dirSearchPath, curdir); 696120053Sru Var_Set(".CURDIR", curdir, VAR_GLOBAL); 697120053Sru Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 698120053Sru 699137606Sphk if (getenv("MAKE_JOBS_FIFO") != NULL) 700137606Sphk forceJobs = TRUE; 701120053Sru /* 70228228Sfsmp * Be compatible if user did not specify -j and did not explicitly 70328228Sfsmp * turned compatibility on 70428228Sfsmp */ 70528228Sfsmp if (!compatMake && !forceJobs) 70628228Sfsmp compatMake = TRUE; 70728228Sfsmp 70828228Sfsmp /* 7091590Srgrimes * Initialize archive, target and suffix modules in preparation for 7101590Srgrimes * parsing the makefile(s) 7111590Srgrimes */ 7121590Srgrimes Arch_Init(); 7131590Srgrimes Targ_Init(); 7141590Srgrimes Suff_Init(); 7151590Srgrimes 71669527Swill DEFAULT = NULL; 717138232Sharti time(&now); 7181590Srgrimes 7191590Srgrimes /* 7201590Srgrimes * Set up the .TARGETS variable to contain the list of targets to be 7211590Srgrimes * created. If none specified, make the variable empty -- the parser 7221590Srgrimes * will fill the thing in with the default or .MAIN target. 7231590Srgrimes */ 724138916Sharti if (!Lst_IsEmpty(&create)) { 725138512Sharti LstNode *ln; 7261590Srgrimes 727138916Sharti for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { 728138264Sharti char *name = Lst_Datum(ln); 7291590Srgrimes 7301590Srgrimes Var_Append(".TARGETS", name, VAR_GLOBAL); 7311590Srgrimes } 7321590Srgrimes } else 7331590Srgrimes Var_Set(".TARGETS", "", VAR_GLOBAL); 7341590Srgrimes 73518730Ssteve 7361590Srgrimes /* 73718730Ssteve * If no user-supplied system path was given (through the -m option) 73818730Ssteve * add the directories from the DEFSYSPATH (more than one may be given 73918730Ssteve * as dir1:...:dirn) to the system include path. 7401590Srgrimes */ 741138916Sharti if (Lst_IsEmpty(&sysIncPath)) { 74218730Ssteve for (start = syspath; *start != '\0'; start = cp) { 74318730Ssteve for (cp = start; *cp != '\0' && *cp != ':'; cp++) 74418730Ssteve continue; 74518730Ssteve if (*cp == '\0') { 746138916Sharti Dir_AddDir(&sysIncPath, start); 74718730Ssteve } else { 74818730Ssteve *cp++ = '\0'; 749138916Sharti Dir_AddDir(&sysIncPath, start); 75018730Ssteve } 75118730Ssteve } 75218730Ssteve } 7531590Srgrimes 75418730Ssteve /* 75518730Ssteve * Read in the built-in rules first, followed by the specified 75618730Ssteve * makefile, if it was (makefile != (char *) NULL), or the default 75718730Ssteve * Makefile and makefile, in that order, if it wasn't. 75818730Ssteve */ 75918730Ssteve if (!noBuiltins) { 760138916Sharti /* Path of sys.mk */ 761138916Sharti Lst sysMkPath = Lst_Initializer(sysMkPath); 762138512Sharti LstNode *ln; 76318730Ssteve 764138916Sharti Dir_Expand(_PATH_DEFSYSMK, &sysIncPath, &sysMkPath); 765138916Sharti if (Lst_IsEmpty(&sysMkPath)) 76618730Ssteve Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 767138916Sharti ln = Lst_Find(&sysMkPath, NULL, ReadMakefile); 76869527Swill if (ln != NULL) 76918730Ssteve Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 770138916Sharti Lst_Destroy(&sysMkPath, free); 77118730Ssteve } 77218730Ssteve 773138916Sharti if (!Lst_IsEmpty(&makefiles)) { 774138512Sharti LstNode *ln; 7751590Srgrimes 776138916Sharti ln = Lst_Find(&makefiles, NULL, ReadMakefile); 77769527Swill if (ln != NULL) 7781590Srgrimes Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 77994594Sobrien } else if (!ReadMakefile("BSDmakefile", NULL)) 78094594Sobrien if (!ReadMakefile("makefile", NULL)) 781138232Sharti ReadMakefile("Makefile", NULL); 7821590Srgrimes 783138232Sharti ReadMakefile(".depend", NULL); 7841590Srgrimes 7851590Srgrimes /* Install all the flags into the MAKE envariable. */ 7865814Sjkh if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 7871590Srgrimes setenv("MAKEFLAGS", p, 1); 788105826Sjmallett free(p1); 7891590Srgrimes 7901590Srgrimes /* 7911590Srgrimes * For compatibility, look at the directories in the VPATH variable 7921590Srgrimes * and add them to the search path, if the variable is defined. The 7931590Srgrimes * variable's value is in the same format as the PATH envariable, i.e. 7941590Srgrimes * <directory>:<directory>:<directory>... 7951590Srgrimes */ 7961590Srgrimes if (Var_Exists("VPATH", VAR_CMD)) { 797104692Sjmallett char *vpath, savec; 7981590Srgrimes /* 7991590Srgrimes * GCC stores string constants in read-only memory, but 8001590Srgrimes * Var_Subst will want to write this thing, so store it 8011590Srgrimes * in an array 8021590Srgrimes */ 8031590Srgrimes static char VPATH[] = "${VPATH}"; 8041590Srgrimes 8051590Srgrimes vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 806104692Sjmallett path = vpath; 8071590Srgrimes do { 8081590Srgrimes /* skip to end of directory */ 809104692Sjmallett for (cp = path; *cp != ':' && *cp != '\0'; cp++) 8101590Srgrimes continue; 8111590Srgrimes /* Save terminator character so know when to stop */ 812104692Sjmallett savec = *cp; 813104692Sjmallett *cp = '\0'; 8141590Srgrimes /* Add directory to search path */ 815138916Sharti Dir_AddDir(&dirSearchPath, path); 816104692Sjmallett *cp = savec; 817104692Sjmallett path = cp + 1; 8181590Srgrimes } while (savec == ':'); 819138232Sharti free(vpath); 8201590Srgrimes } 8211590Srgrimes 8221590Srgrimes /* 8231590Srgrimes * Now that all search paths have been read for suffixes et al, it's 8241590Srgrimes * time to add the default search path to their lists... 8251590Srgrimes */ 8261590Srgrimes Suff_DoPaths(); 8271590Srgrimes 8281590Srgrimes /* print the initial graph, if the user requested it */ 8291590Srgrimes if (DEBUG(GRAPH1)) 8301590Srgrimes Targ_PrintGraph(1); 8311590Srgrimes 83217193Sbde /* print the values of any variables requested by the user */ 833138916Sharti if (!Lst_IsEmpty(&variables)) { 834138512Sharti LstNode *ln; 83517193Sbde 836138916Sharti for (ln = Lst_First(&variables); ln != NULL; 83717193Sbde ln = Lst_Succ(ln)) { 83866365Speter char *value; 83966365Speter if (expandVars) { 840138264Sharti p1 = emalloc(strlen(Lst_Datum(ln)) + 1 + 3); 84166365Speter /* This sprintf is safe, because of the malloc above */ 842138232Sharti sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 84366365Speter value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 84466365Speter } else { 845138264Sharti value = Var_Value(Lst_Datum(ln), 84666365Speter VAR_GLOBAL, &p1); 84766365Speter } 84817193Sbde printf("%s\n", value ? value : ""); 84966365Speter if (p1) 85066365Speter free(p1); 85117193Sbde } 852101460Sru } else { 85317193Sbde 8541590Srgrimes /* 855101460Sru * Have now read the entire graph and need to make a list of targets 856101460Sru * to create. If none was given on the command line, we consult the 857101460Sru * parsing module to find the main target(s) to create. 8581590Srgrimes */ 859138916Sharti Lst targs = Lst_Initializer(targs); 860138916Sharti 861138916Sharti if (Lst_IsEmpty(&create)) 862138916Sharti Parse_MainName(&targs); 863101460Sru else 864138916Sharti Targ_FindList(&targs, &create, TARG_CREATE); 865101460Sru 866101460Sru if (!compatMake) { 867101460Sru /* 868101460Sru * Initialize job module before traversing the graph, now that 869101460Sru * any .BEGIN and .END targets have been read. This is done 870101460Sru * only if the -q flag wasn't given (to prevent the .BEGIN from 871101460Sru * being executed should it exist). 872101460Sru */ 873101460Sru if (!queryFlag) { 874137572Sphk Job_Init(maxJobs); 875101460Sru jobsRunning = TRUE; 876101460Sru } 877101460Sru 878101460Sru /* Traverse the graph, checking on all the targets */ 879138916Sharti outOfDate = Make_Run(&targs); 880101460Sru } else { 881101460Sru /* 882101460Sru * Compat_Init will take care of creating all the targets as 883101460Sru * well as initializing the module. 884101460Sru */ 885138916Sharti Compat_Run(&targs); 886120718Sru outOfDate = 0; 8871590Srgrimes } 888138916Sharti Lst_Destroy(&targs, NOFREE); 88917193Sbde } 8908874Srgrimes 891138920Sru Lst_Destroy(&variables, free); 892138920Sru Lst_Destroy(&makefiles, free); 893138916Sharti Lst_Destroy(&create, free); 8945814Sjkh 8951590Srgrimes /* print the graph now it's been processed if the user requested it */ 8961590Srgrimes if (DEBUG(GRAPH2)) 8971590Srgrimes Targ_PrintGraph(2); 8981590Srgrimes 8991590Srgrimes if (queryFlag && outOfDate) 900138232Sharti return (1); 9011590Srgrimes else 902138232Sharti return (0); 9031590Srgrimes} 9041590Srgrimes 9051590Srgrimes/*- 9061590Srgrimes * ReadMakefile -- 9071590Srgrimes * Open and parse the given makefile. 9081590Srgrimes * 9091590Srgrimes * Results: 9101590Srgrimes * TRUE if ok. FALSE if couldn't open file. 9111590Srgrimes * 9121590Srgrimes * Side Effects: 9131590Srgrimes * lots 9141590Srgrimes */ 9151590Srgrimesstatic Boolean 916138561ShartiReadMakefile(const void *p, const void *q __unused) 9171590Srgrimes{ 918104696Sjmallett char *fname; /* makefile to read */ 9191590Srgrimes FILE *stream; 92073262Simp char *name, path[MAXPATHLEN]; 92197163Sjmallett char *MAKEFILE; 92294990Sru int setMAKEFILE; 9231590Srgrimes 924138561Sharti /* XXX - remove this once constification is done */ 925138561Sharti fname = estrdup(p); 926104696Sjmallett 9271590Srgrimes if (!strcmp(fname, "-")) { 9281590Srgrimes Parse_File("(stdin)", stdin); 9291590Srgrimes Var_Set("MAKEFILE", "", VAR_GLOBAL); 9301590Srgrimes } else { 93194990Sru setMAKEFILE = strcmp(fname, ".depend"); 93294990Sru 9331590Srgrimes /* if we've chdir'd, rebuild the path name */ 9341590Srgrimes if (curdir != objdir && *fname != '/') { 935138232Sharti snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 936100733Simp /* 937100733Simp * XXX The realpath stuff breaks relative includes 938100733Simp * XXX in some cases. The problem likely is in 939100733Simp * XXX parse.c where it does special things in 940100733Simp * XXX ParseDoInclude if the file is relateive 941100733Simp * XXX or absolute and not a system file. There 942100733Simp * XXX it assumes that if the current file that's 943100733Simp * XXX being included is absolute, that any files 944100733Simp * XXX that it includes shouldn't do the -I path 945100733Simp * XXX stuff, which is inconsistant with historical 946100733Simp * XXX behavior. However, I can't pentrate the mists 947100733Simp * XXX further, so I'm putting this workaround in 948100733Simp * XXX here until such time as the underlying bug 949100733Simp * XXX can be fixed. 950100733Simp */ 951100733Simp#if THIS_BREAKS_THINGS 95297077Sjmallett if (realpath(path, path) != NULL && 95397077Sjmallett (stream = fopen(path, "r")) != NULL) { 95497163Sjmallett MAKEFILE = fname; 9551590Srgrimes fname = path; 9561590Srgrimes goto found; 9571590Srgrimes } 95897077Sjmallett } else if (realpath(fname, path) != NULL) { 95997163Sjmallett MAKEFILE = fname; 96097077Sjmallett fname = path; 96197077Sjmallett if ((stream = fopen(fname, "r")) != NULL) 96297077Sjmallett goto found; 96397077Sjmallett } 964100733Simp#else 965100733Simp if ((stream = fopen(path, "r")) != NULL) { 966100733Simp MAKEFILE = fname; 967100733Simp fname = path; 968100733Simp goto found; 969100733Simp } 970100733Simp } else { 971100733Simp MAKEFILE = fname; 972100733Simp if ((stream = fopen(fname, "r")) != NULL) 973100733Simp goto found; 974100733Simp } 975100733Simp#endif 9761590Srgrimes /* look in -I and system include directories. */ 977138916Sharti name = Dir_FindFile(fname, &parseIncPath); 9781590Srgrimes if (!name) 979138916Sharti name = Dir_FindFile(fname, &sysIncPath); 9801590Srgrimes if (!name || !(stream = fopen(name, "r"))) 981138232Sharti return (FALSE); 98297163Sjmallett MAKEFILE = fname = name; 9831590Srgrimes /* 9841590Srgrimes * set the MAKEFILE variable desired by System V fans -- the 9851590Srgrimes * placement of the setting here means it gets set to the last 9861590Srgrimes * makefile specified, as it is set by SysV make. 9871590Srgrimes */ 98894990Srufound: 98994990Sru if (setMAKEFILE) 99097163Sjmallett Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); 9911590Srgrimes Parse_File(fname, stream); 992138232Sharti fclose(stream); 9931590Srgrimes } 994138232Sharti return (TRUE); 9951590Srgrimes} 9961590Srgrimes 9971590Srgrimes/*- 99818730Ssteve * Cmd_Exec -- 99918730Ssteve * Execute the command in cmd, and return the output of that command 100018730Ssteve * in a string. 100118730Ssteve * 100218730Ssteve * Results: 100318730Ssteve * A string containing the output of the command, or the empty string 1004104121Sjmallett * If error is not NULL, it contains the reason for the command failure 100518730Ssteve * 100618730Ssteve * Side Effects: 100718730Ssteve * The string must be freed by the caller. 100818730Ssteve */ 100918730Sstevechar * 1010104696SjmallettCmd_Exec(char *cmd, char **error) 101118730Ssteve{ 101218730Ssteve char *args[4]; /* Args for invoking the shell */ 101318730Ssteve int fds[2]; /* Pipe streams */ 101418730Ssteve int cpid; /* Child PID */ 101518730Ssteve int pid; /* PID from wait() */ 101618730Ssteve char *res; /* result */ 101718730Ssteve int status; /* command exit status */ 101818730Ssteve Buffer buf; /* buffer to store the result */ 101918730Ssteve char *cp; 1020138346Sharti size_t blen; 1021138346Sharti ssize_t rcnt; 102218730Ssteve 1023104121Sjmallett *error = NULL; 102418730Ssteve 1025136840Sru if (shellPath == NULL) 1026136840Sru Shell_Init(); 102718730Ssteve /* 102818730Ssteve * Set up arguments for shell 102918730Ssteve */ 1030136840Sru args[0] = shellName; 103118730Ssteve args[1] = "-c"; 103218730Ssteve args[2] = cmd; 103318730Ssteve args[3] = NULL; 103418730Ssteve 103518730Ssteve /* 103618730Ssteve * Open a pipe for fetching its output 103718730Ssteve */ 103818730Ssteve if (pipe(fds) == -1) { 1039104121Sjmallett *error = "Couldn't create pipe for \"%s\""; 104018730Ssteve goto bad; 104118730Ssteve } 104218730Ssteve 104318730Ssteve /* 104418730Ssteve * Fork 104518730Ssteve */ 104618730Ssteve switch (cpid = vfork()) { 104718730Ssteve case 0: 104818730Ssteve /* 104918730Ssteve * Close input side of pipe 105018730Ssteve */ 1051138232Sharti close(fds[0]); 105218730Ssteve 105318730Ssteve /* 105418730Ssteve * Duplicate the output stream to the shell's output, then 105518730Ssteve * shut the extra thing down. Note we don't fetch the error 105618730Ssteve * stream...why not? Why? 105718730Ssteve */ 1058138232Sharti dup2(fds[1], 1); 1059138232Sharti close(fds[1]); 106018730Ssteve 1061138232Sharti execv(shellPath, args); 106218730Ssteve _exit(1); 106318730Ssteve /*NOTREACHED*/ 106418730Ssteve 106518730Ssteve case -1: 1066104121Sjmallett *error = "Couldn't exec \"%s\""; 106718730Ssteve goto bad; 106818730Ssteve 106918730Ssteve default: 107018730Ssteve /* 107118730Ssteve * No need for the writing half 107218730Ssteve */ 1073138232Sharti close(fds[1]); 107418730Ssteve 1075138232Sharti buf = Buf_Init(MAKE_BSIZE); 107618730Ssteve 107718730Ssteve do { 107818730Ssteve char result[BUFSIZ]; 1079138346Sharti rcnt = read(fds[0], result, sizeof(result)); 1080138346Sharti if (rcnt != -1) 1081138346Sharti Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result); 1082138346Sharti } while (rcnt > 0 || (rcnt == -1 && errno == EINTR)); 108318730Ssteve /* 108418730Ssteve * Close the input side of the pipe. 108518730Ssteve */ 1086138232Sharti close(fds[0]); 108718730Ssteve 108818730Ssteve /* 108918730Ssteve * Wait for the process to exit. 109018730Ssteve */ 1091138232Sharti while (((pid = wait(&status)) != cpid) && (pid >= 0)) 109218730Ssteve continue; 109318730Ssteve 1094138346Sharti if (rcnt == -1) 1095104121Sjmallett *error = "Error reading shell's output for \"%s\""; 109618864Ssteve 1097138346Sharti res = (char *)Buf_GetAll(buf, &blen); 1098138232Sharti Buf_Destroy(buf, FALSE); 109918730Ssteve 110018730Ssteve if (status) 1101104121Sjmallett *error = "\"%s\" returned non-zero status"; 110218730Ssteve 110318730Ssteve /* 110418730Ssteve * Null-terminate the result, convert newlines to spaces and 110518730Ssteve * install it in the variable. 110618730Ssteve */ 1107138346Sharti res[blen] = '\0'; 1108138346Sharti cp = &res[blen] - 1; 110918730Ssteve 111018730Ssteve if (*cp == '\n') { 111118730Ssteve /* 111218730Ssteve * A final newline is just stripped 111318730Ssteve */ 111418730Ssteve *cp-- = '\0'; 111518730Ssteve } 111618730Ssteve while (cp >= res) { 111718730Ssteve if (*cp == '\n') { 111818730Ssteve *cp = ' '; 111918730Ssteve } 112018730Ssteve cp--; 112118730Ssteve } 112218730Ssteve break; 112318730Ssteve } 1124138232Sharti return (res); 112518730Sstevebad: 112618730Ssteve res = emalloc(1); 112718730Ssteve *res = '\0'; 1128138232Sharti return (res); 112918730Ssteve} 113018730Ssteve 11311590Srgrimes/* 11321590Srgrimes * usage -- 11331590Srgrimes * exit with usage message 11341590Srgrimes */ 11351590Srgrimesstatic void 1136104696Sjmallettusage(void) 11371590Srgrimes{ 1138138232Sharti fprintf(stderr, "%s\n%s\n%s\n", 1139113512Sru"usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", 1140113512Sru" [-E variable] [-f makefile] [-I directory] [-j max_jobs]", 1141113512Sru" [-m directory] [-V variable] [variable=value] [target ...]"); 11421590Srgrimes exit(2); 11431590Srgrimes} 1144