main.c revision 141974
1141104Sharti/*- 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 141974 2005-02-16 17:20:09Z 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 63141104Sharti#ifndef MACHINE 64141104Sharti#include <sys/utsname.h> 65141104Sharti#endif 661590Srgrimes#include <sys/param.h> 671590Srgrimes#include <sys/stat.h> 6839006Skato#include <sys/sysctl.h> 69127880Sdes#include <sys/time.h> 70127899Sru#include <sys/resource.h> 7118730Ssteve#include <sys/wait.h> 7227644Scharnier#include <err.h> 731590Srgrimes#include <errno.h> 74127880Sdes#include <signal.h> 75127880Sdes#include <stdlib.h> 76141104Sharti#include <string.h> 7763955Simp#include <unistd.h> 78127880Sdes 79141104Sharti#include "arch.h" 80141133Sharti#include "buf.h" 81141104Sharti#include "compat.h" 82141104Sharti#include "config.h" 831590Srgrimes#include "dir.h" 84141104Sharti#include "globals.h" 851590Srgrimes#include "job.h" 86141104Sharti#include "make.h" 87141104Sharti#include "nonints.h" 88141104Sharti#include "parse.h" 891590Srgrimes#include "pathnames.h" 90141104Sharti#include "str.h" 91141104Sharti#include "suff.h" 92141104Sharti#include "targ.h" 93141104Sharti#include "util.h" 94141104Sharti#include "var.h" 951590Srgrimes 96104395Sjmallett#define WANT_ENV_MKLVL 1 97138071Sjmallett#define MKLVL_MAXVAL 500 98138071Sjmallett#define MKLVL_ENVVAR "__MKLVL__" 99104395Sjmallett 1001590Srgrimes#define MAKEFLAGS ".MAKEFLAGS" 1011590Srgrimes 102138916Sharti/* Targets to be made */ 103138916ShartiLst create = Lst_Initializer(create); 104138916Sharti 1051590Srgrimestime_t now; /* Time at start of make */ 106141104Shartistruct GNode *DEFAULT; /* .DEFAULT node */ 1071590SrgrimesBoolean allPrecious; /* .PRECIOUS given on line by itself */ 1081590Srgrimes 1091590Srgrimesstatic Boolean noBuiltins; /* -r flag */ 110138916Sharti 111138916Sharti/* ordered list of makefiles to read */ 112138916Shartistatic Lst makefiles = Lst_Initializer(makefiles); 113138916Sharti 11466365Speterstatic Boolean expandVars; /* fully expand printed variables */ 115138916Sharti 116138916Sharti/* list of variables to print */ 117138916Shartistatic Lst variables = Lst_Initializer(variables); 118138916Sharti 11918730Ssteveint maxJobs; /* -j argument */ 12028228Sfsmpstatic Boolean forceJobs; /* -j argument given */ 1211590SrgrimesBoolean compatMake; /* -B argument */ 1221590SrgrimesBoolean debug; /* -d flag */ 1231590SrgrimesBoolean noExecute; /* -n flag */ 1241590SrgrimesBoolean keepgoing; /* -k flag */ 1251590SrgrimesBoolean queryFlag; /* -q flag */ 1261590SrgrimesBoolean touchFlag; /* -t flag */ 1271590SrgrimesBoolean usePipes; /* !-P flag */ 1281590SrgrimesBoolean ignoreErrors; /* -i flag */ 1291590SrgrimesBoolean beSilent; /* -s flag */ 13041151SdgBoolean beVerbose; /* -v flag */ 1311590SrgrimesBoolean oldVars; /* variable substitution style */ 1321590SrgrimesBoolean checkEnvFirst; /* -e flag */ 133138916Sharti 134138916Sharti/* (-E) vars to override from env */ 135138916ShartiLst envFirstVars = Lst_Initializer(envFirstVars); 136138916Sharti 137104818SjmallettBoolean jobsRunning; /* TRUE if the jobs might be running */ 1381590Srgrimes 13992921Simpstatic void MainParseArgs(int, char **); 140141252Shartichar *chdir_verify_path(const char *, char *); 141138561Shartistatic int ReadMakefile(const void *, const void *); 14292921Simpstatic void usage(void); 1431590Srgrimes 1441590Srgrimesstatic char *curdir; /* startup directory */ 1451590Srgrimesstatic char *objdir; /* where we chdir'ed to */ 1461590Srgrimes 147133085Sharti/* 148133085Sharti * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 149133085Sharti */ 150133085Shartistatic void 151141252ShartiMFLAGS_append(const char *flag, char *arg) 152133085Sharti{ 153140870Sharti char *str; 154138232Sharti 155133085Sharti Var_Append(MAKEFLAGS, flag, VAR_GLOBAL); 156140870Sharti if (arg != NULL) { 157140870Sharti str = MAKEFLAGS_quote(arg); 158140870Sharti Var_Append(MAKEFLAGS, str, VAR_GLOBAL); 159140870Sharti free(str); 160140870Sharti } 161133085Sharti 162133085Sharti Var_Append("MFLAGS", flag, VAR_GLOBAL); 163140870Sharti if (arg != NULL) { 164140870Sharti str = MAKEFLAGS_quote(arg); 165140870Sharti Var_Append("MFLAGS", str, VAR_GLOBAL); 166140870Sharti free(str); 167140870Sharti } 168133085Sharti} 169133085Sharti 1701590Srgrimes/*- 1711590Srgrimes * MainParseArgs -- 1721590Srgrimes * Parse a given argument vector. Called from main() and from 1731590Srgrimes * Main_ParseArgLine() when the .MAKEFLAGS target is used. 1741590Srgrimes * 1751590Srgrimes * XXX: Deal with command line overriding .MAKEFLAGS in makefile 1761590Srgrimes * 1771590Srgrimes * Results: 1781590Srgrimes * None 1791590Srgrimes * 1801590Srgrimes * Side Effects: 1811590Srgrimes * Various global and local flags will be set depending on the flags 1821590Srgrimes * given 1831590Srgrimes */ 1841590Srgrimesstatic void 185104696SjmallettMainParseArgs(int argc, char **argv) 1861590Srgrimes{ 1875814Sjkh int c; 1881590Srgrimes 1891590Srgrimes optind = 1; /* since we're called more than once */ 190137202Sharti#define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" 19124360Simprearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 1921590Srgrimes switch(c) { 193102393Sjmallett case 'C': 194107964Sseanc if (chdir(optarg) == -1) 195107964Sseanc err(1, "chdir %s", optarg); 196102393Sjmallett break; 1971590Srgrimes case 'D': 1981590Srgrimes Var_Set(optarg, "1", VAR_GLOBAL); 199133085Sharti MFLAGS_append("-D", optarg); 2001590Srgrimes break; 2011590Srgrimes case 'I': 2021590Srgrimes Parse_AddIncludeDir(optarg); 203133085Sharti MFLAGS_append("-I", optarg); 2041590Srgrimes break; 20517193Sbde case 'V': 206138920Sru Lst_AtEnd(&variables, estrdup(optarg)); 207133085Sharti MFLAGS_append("-V", optarg); 20817193Sbde break; 20966365Speter case 'X': 21066365Speter expandVars = FALSE; 21166365Speter break; 2121590Srgrimes case 'B': 2131590Srgrimes compatMake = TRUE; 214133085Sharti MFLAGS_append("-B", NULL); 215137626Sphk unsetenv("MAKE_JOBS_FIFO"); 2161590Srgrimes break; 2171590Srgrimes case 'P': 2181590Srgrimes usePipes = FALSE; 219133085Sharti MFLAGS_append("-P", NULL); 2201590Srgrimes break; 2211590Srgrimes case 'S': 2221590Srgrimes keepgoing = FALSE; 223133085Sharti MFLAGS_append("-S", NULL); 2241590Srgrimes break; 2251590Srgrimes case 'd': { 2261590Srgrimes char *modules = optarg; 2271590Srgrimes 2281590Srgrimes for (; *modules; ++modules) 2291590Srgrimes switch (*modules) { 2301590Srgrimes case 'A': 2311590Srgrimes debug = ~0; 2321590Srgrimes break; 2331590Srgrimes case 'a': 2341590Srgrimes debug |= DEBUG_ARCH; 2351590Srgrimes break; 2361590Srgrimes case 'c': 2371590Srgrimes debug |= DEBUG_COND; 2381590Srgrimes break; 2391590Srgrimes case 'd': 2401590Srgrimes debug |= DEBUG_DIR; 2411590Srgrimes break; 2421590Srgrimes case 'f': 2431590Srgrimes debug |= DEBUG_FOR; 2441590Srgrimes break; 2451590Srgrimes case 'g': 2461590Srgrimes if (modules[1] == '1') { 2471590Srgrimes debug |= DEBUG_GRAPH1; 2481590Srgrimes ++modules; 2491590Srgrimes } 2501590Srgrimes else if (modules[1] == '2') { 2511590Srgrimes debug |= DEBUG_GRAPH2; 2521590Srgrimes ++modules; 2531590Srgrimes } 2541590Srgrimes break; 2551590Srgrimes case 'j': 2561590Srgrimes debug |= DEBUG_JOB; 2571590Srgrimes break; 25860569Swill case 'l': 25960569Swill debug |= DEBUG_LOUD; 26060569Swill break; 2611590Srgrimes case 'm': 2621590Srgrimes debug |= DEBUG_MAKE; 2631590Srgrimes break; 2641590Srgrimes case 's': 2651590Srgrimes debug |= DEBUG_SUFF; 2661590Srgrimes break; 2671590Srgrimes case 't': 2681590Srgrimes debug |= DEBUG_TARG; 2691590Srgrimes break; 2701590Srgrimes case 'v': 2711590Srgrimes debug |= DEBUG_VAR; 2721590Srgrimes break; 2731590Srgrimes default: 27427644Scharnier warnx("illegal argument to d option -- %c", *modules); 2751590Srgrimes usage(); 2761590Srgrimes } 277133085Sharti MFLAGS_append("-d", optarg); 2781590Srgrimes break; 2791590Srgrimes } 28049332Shoek case 'E': 281138920Sru Lst_AtEnd(&envFirstVars, estrdup(optarg)); 282133085Sharti MFLAGS_append("-E", optarg); 28349332Shoek break; 2841590Srgrimes case 'e': 2851590Srgrimes checkEnvFirst = TRUE; 286133085Sharti MFLAGS_append("-e", NULL); 2871590Srgrimes break; 2881590Srgrimes case 'f': 289138920Sru Lst_AtEnd(&makefiles, estrdup(optarg)); 2901590Srgrimes break; 2911590Srgrimes case 'i': 2921590Srgrimes ignoreErrors = TRUE; 293133085Sharti MFLAGS_append("-i", NULL); 2941590Srgrimes break; 29549331Shoek case 'j': { 29649331Shoek char *endptr; 29749331Shoek 29818730Ssteve forceJobs = TRUE; 29949331Shoek maxJobs = strtol(optarg, &endptr, 10); 30049331Shoek if (maxJobs <= 0 || *endptr != '\0') { 30149938Shoek warnx("illegal number, -j argument -- %s", 30249938Shoek optarg); 30349938Shoek usage(); 30449331Shoek } 305133085Sharti MFLAGS_append("-j", optarg); 3061590Srgrimes break; 30749331Shoek } 3081590Srgrimes case 'k': 3091590Srgrimes keepgoing = TRUE; 310133085Sharti MFLAGS_append("-k", NULL); 3111590Srgrimes break; 31218730Ssteve case 'm': 313138916Sharti Dir_AddDir(&sysIncPath, optarg); 314133085Sharti MFLAGS_append("-m", optarg); 31518730Ssteve break; 3161590Srgrimes case 'n': 3171590Srgrimes noExecute = TRUE; 318133085Sharti MFLAGS_append("-n", NULL); 3191590Srgrimes break; 3201590Srgrimes case 'q': 3211590Srgrimes queryFlag = TRUE; 3221590Srgrimes /* Kind of nonsensical, wot? */ 323133085Sharti MFLAGS_append("-q", NULL); 3241590Srgrimes break; 3251590Srgrimes case 'r': 3261590Srgrimes noBuiltins = TRUE; 327133085Sharti MFLAGS_append("-r", NULL); 3281590Srgrimes break; 3291590Srgrimes case 's': 3301590Srgrimes beSilent = TRUE; 331133085Sharti MFLAGS_append("-s", NULL); 3321590Srgrimes break; 3331590Srgrimes case 't': 3341590Srgrimes touchFlag = TRUE; 335133085Sharti MFLAGS_append("-t", NULL); 3361590Srgrimes break; 33741151Sdg case 'v': 33841151Sdg beVerbose = TRUE; 339133085Sharti MFLAGS_append("-v", NULL); 34041151Sdg break; 3411590Srgrimes default: 3421590Srgrimes case '?': 3431590Srgrimes usage(); 3441590Srgrimes } 3451590Srgrimes } 3461590Srgrimes 3471590Srgrimes oldVars = TRUE; 3481590Srgrimes 3491590Srgrimes /* 3501590Srgrimes * See if the rest of the arguments are variable assignments and 3511590Srgrimes * perform them if so. Else take them to be targets and stuff them 3521590Srgrimes * on the end of the "create" list. 3531590Srgrimes */ 3541590Srgrimes for (argv += optind, argc -= optind; *argv; ++argv, --argc) 355133562Sharti if (Parse_IsVar(*argv)) { 356140870Sharti char *ptr = MAKEFLAGS_quote(*argv); 357133562Sharti 358133562Sharti Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL); 359133562Sharti free(ptr); 360133562Sharti 3611590Srgrimes Parse_DoVar(*argv, VAR_CMD); 362133562Sharti } else { 3631590Srgrimes if (!**argv) 3641590Srgrimes Punt("illegal (null) argument."); 3651590Srgrimes if (**argv == '-') { 3661590Srgrimes if ((*argv)[1]) 3671590Srgrimes optind = 0; /* -flag... */ 3681590Srgrimes else 3691590Srgrimes optind = 1; /* - */ 3701590Srgrimes goto rearg; 3711590Srgrimes } 372138916Sharti Lst_AtEnd(&create, estrdup(*argv)); 3731590Srgrimes } 3741590Srgrimes} 3751590Srgrimes 3761590Srgrimes/*- 3771590Srgrimes * Main_ParseArgLine -- 3781590Srgrimes * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 3791590Srgrimes * is encountered and by main() when reading the .MAKEFLAGS envariable. 3801590Srgrimes * Takes a line of arguments and breaks it into its 3811590Srgrimes * component words and passes those words and the number of them to the 3821590Srgrimes * MainParseArgs function. 3831590Srgrimes * The line should have all its leading whitespace removed. 3841590Srgrimes * 3851590Srgrimes * Results: 3861590Srgrimes * None 3871590Srgrimes * 3881590Srgrimes * Side Effects: 3891590Srgrimes * Only those that come from the various arguments. 3901590Srgrimes */ 3911590Srgrimesvoid 392140870ShartiMain_ParseArgLine(char *line, int mflags) 3931590Srgrimes{ 3941590Srgrimes char **argv; /* Manufactured argument vector */ 3951590Srgrimes int argc; /* Number of arguments in argv */ 3961590Srgrimes 3971590Srgrimes if (line == NULL) 3981590Srgrimes return; 3991590Srgrimes for (; *line == ' '; ++line) 4001590Srgrimes continue; 4011590Srgrimes if (!*line) 4021590Srgrimes return; 4031590Srgrimes 404140870Sharti if (mflags) 405140870Sharti argv = MAKEFLAGS_break(line, &argc); 406140870Sharti else 407140870Sharti argv = brk_string(line, &argc, TRUE); 408140870Sharti 4091590Srgrimes MainParseArgs(argc, argv); 4101590Srgrimes} 4111590Srgrimes 41218339Sswallacechar * 413141252Shartichdir_verify_path(const char *path, char *obpath) 41418339Sswallace{ 41518339Sswallace struct stat sb; 41618339Sswallace 41718339Sswallace if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 41875973Sru if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 41927644Scharnier warn("warning: %s", path); 420141252Sharti return (NULL); 42118339Sswallace } 422138232Sharti return (obpath); 42318339Sswallace } 42418339Sswallace 425141252Sharti return (NULL); 42618339Sswallace} 42718339Sswallace 428133082Shartistatic void 429133082Sharticatch_child(int sig __unused) 430123513Sdes{ 431123513Sdes} 43218339Sswallace 433138071Sjmallett/* 434138071Sjmallett * In lieu of a good way to prevent every possible looping in 435138071Sjmallett * make(1), stop there from being more than MKLVL_MAXVAL processes forked 436138071Sjmallett * by make(1), to prevent a forkbomb from happening, in a dumb and 437138071Sjmallett * mechanical way. 438138071Sjmallett */ 439138071Sjmallettstatic void 440138071Sjmallettcheck_make_level(void) 441138071Sjmallett{ 442138071Sjmallett#ifdef WANT_ENV_MKLVL 443138071Sjmallett char *value = getenv(MKLVL_ENVVAR); 444138071Sjmallett int level = (value == NULL) ? 0 : atoi(value); 445138071Sjmallett 446138071Sjmallett if (level < 0) { 447138071Sjmallett errc(2, EAGAIN, "Invalid value for recursion level (%d).", level); 448138071Sjmallett } else if (level > MKLVL_MAXVAL) { 449138071Sjmallett errc(2, EAGAIN, "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 450138071Sjmallett } else { 451138071Sjmallett char new_value[32]; 452138071Sjmallett sprintf(new_value, "%d", level + 1); 453138071Sjmallett setenv(MKLVL_ENVVAR, new_value, 1); 454138071Sjmallett } 455138071Sjmallett#endif /* WANT_ENV_MKLVL */ 456138071Sjmallett} 457138071Sjmallett 4581590Srgrimes/*- 4591590Srgrimes * main -- 4601590Srgrimes * The main function, for obvious reasons. Initializes variables 4611590Srgrimes * and a few modules, then parses the arguments give it in the 4621590Srgrimes * environment and on the command line. Reads the system makefile 4631590Srgrimes * followed by either Makefile, makefile or the file given by the 4641590Srgrimes * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 4651590Srgrimes * flags it has received by then uses either the Make or the Compat 4661590Srgrimes * module to create the initial list of targets. 4671590Srgrimes * 4681590Srgrimes * Results: 4691590Srgrimes * If -q was given, exits -1 if anything was out-of-date. Else it exits 4701590Srgrimes * 0. 4711590Srgrimes * 4721590Srgrimes * Side Effects: 4731590Srgrimes * The program exits when done. Targets are created. etc. etc. etc. 4741590Srgrimes */ 4751590Srgrimesint 476104696Sjmallettmain(int argc, char **argv) 4771590Srgrimes{ 4781590Srgrimes Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 479141252Sharti char *p, *p1, *pathp; 480141252Sharti char *path; 48173262Simp char mdpath[MAXPATHLEN]; 48273262Simp char obpath[MAXPATHLEN]; 48373262Simp char cdpath[MAXPATHLEN]; 484141252Sharti const char *machine = getenv("MACHINE"); 485141252Sharti const char *machine_arch = getenv("MACHINE_ARCH"); 486141252Sharti const char *machine_cpu = getenv("MACHINE_CPU"); 48718730Ssteve char *cp = NULL, *start; 488141252Sharti 48918730Ssteve /* avoid faults on read-only strings */ 49018730Ssteve static char syspath[] = _PATH_DEFSYSPATH; 4911590Srgrimes 492123513Sdes { 493123513Sdes /* 494123513Sdes * Catch SIGCHLD so that we get kicked out of select() when we 495123513Sdes * need to look at a child. This is only known to matter for the 496123513Sdes * -j case (perhaps without -P). 497123513Sdes * 498123513Sdes * XXX this is intentionally misplaced. 499123513Sdes */ 500123513Sdes struct sigaction sa; 501123513Sdes 502123513Sdes sigemptyset(&sa.sa_mask); 503123513Sdes sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; 504123513Sdes sa.sa_handler = catch_child; 505123513Sdes sigaction(SIGCHLD, &sa, NULL); 506123513Sdes } 507123513Sdes 508138071Sjmallett check_make_level(); 509104395Sjmallett 51064739Sgreen#if DEFSHELL == 2 51164739Sgreen /* 51264739Sgreen * Turn off ENV to make ksh happier. 51364739Sgreen */ 51464739Sgreen unsetenv("ENV"); 51564739Sgreen#endif 51664739Sgreen 51718730Ssteve#ifdef RLIMIT_NOFILE 5181590Srgrimes /* 51918730Ssteve * get rid of resource limit on file descriptors 52018730Ssteve */ 52118730Ssteve { 52218730Ssteve struct rlimit rl; 52318730Ssteve if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 52418730Ssteve rl.rlim_cur != rl.rlim_max) { 52518730Ssteve rl.rlim_cur = rl.rlim_max; 526138232Sharti setrlimit(RLIMIT_NOFILE, &rl); 52718730Ssteve } 52818730Ssteve } 52918730Ssteve#endif 5301590Srgrimes 5315814Sjkh /* 53239006Skato * PC-98 kernel sets the `i386' string to the utsname.machine and 53339006Skato * it cannot be distinguished from IBM-PC by uname(3). Therefore, 53439006Skato * we check machine.ispc98 and adjust the machine variable before 53539006Skato * using usname(3) below. 53653631Smarcel * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 53753631Smarcel * __FreeBSD_version was defined as 300003. So, this check can 53853631Smarcel * safely be done with any kernel with version > 300003. 53939006Skato */ 54039006Skato if (!machine) { 54139006Skato int ispc98; 54239006Skato size_t len; 54339006Skato 54439006Skato len = sizeof(ispc98); 54539006Skato if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 54639006Skato if (ispc98) 54739006Skato machine = "pc98"; 54839006Skato } 54939006Skato } 55039006Skato 55139006Skato /* 5525814Sjkh * Get the name of this type of MACHINE from utsname 5535814Sjkh * so we can share an executable for similar machines. 5545814Sjkh * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 5555814Sjkh * 5565814Sjkh * Note that while MACHINE is decided at run-time, 5575814Sjkh * MACHINE_ARCH is always known at compile time. 5585814Sjkh */ 55918864Ssteve if (!machine) { 56018339Sswallace#ifndef MACHINE 56118730Ssteve struct utsname utsname; 56218730Ssteve 56394506Scharnier if (uname(&utsname) == -1) 56494506Scharnier err(2, "uname"); 5655814Sjkh machine = utsname.machine; 56618339Sswallace#else 56718339Sswallace machine = MACHINE; 56818339Sswallace#endif 5695814Sjkh } 5701590Srgrimes 57144362Simp if (!machine_arch) { 57244362Simp#ifndef MACHINE_ARCH 57344362Simp machine_arch = "unknown"; 57444362Simp#else 57544362Simp machine_arch = MACHINE_ARCH; 57644362Simp#endif 57744362Simp } 57844362Simp 5791590Srgrimes /* 58072679Skris * Set machine_cpu to the minumum supported CPU revision based 58172679Skris * on the target architecture, if not already set. 58272679Skris */ 58372679Skris if (!machine_cpu) { 58472679Skris if (!strcmp(machine_arch, "i386")) 58572679Skris machine_cpu = "i386"; 58672679Skris else if (!strcmp(machine_arch, "alpha")) 58772679Skris machine_cpu = "ev4"; 58872679Skris else 58972679Skris machine_cpu = "unknown"; 59072679Skris } 5911590Srgrimes 59266365Speter expandVars = TRUE; 5931590Srgrimes beSilent = FALSE; /* Print commands as executed */ 5941590Srgrimes ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 5951590Srgrimes noExecute = FALSE; /* Execute all commands */ 5961590Srgrimes keepgoing = FALSE; /* Stop on error */ 5971590Srgrimes allPrecious = FALSE; /* Remove targets when interrupted */ 5981590Srgrimes queryFlag = FALSE; /* This is not just a check-run */ 5991590Srgrimes noBuiltins = FALSE; /* Read the built-in rules */ 6001590Srgrimes touchFlag = FALSE; /* Actually update targets */ 6011590Srgrimes usePipes = TRUE; /* Catch child output in pipes */ 6021590Srgrimes debug = 0; /* No debug verbosity, please. */ 6031590Srgrimes jobsRunning = FALSE; 6041590Srgrimes 605137571Sphk maxJobs = DEFMAXJOBS; 60628228Sfsmp forceJobs = FALSE; /* No -j flag */ 60718730Ssteve compatMake = FALSE; /* No compat mode */ 6081590Srgrimes 6091590Srgrimes /* 6101590Srgrimes * Initialize the parsing, directory and variable modules to prepare 6111590Srgrimes * for the reading of inclusion paths and variable settings on the 6121590Srgrimes * command line 6131590Srgrimes */ 6141590Srgrimes Dir_Init(); /* Initialize directory structures so -I flags 6151590Srgrimes * can be processed correctly */ 6161590Srgrimes Parse_Init(); /* Need to initialize the paths of #include 6171590Srgrimes * directories */ 6181590Srgrimes Var_Init(); /* As well as the lists of variables for 6191590Srgrimes * parsing arguments */ 6205814Sjkh str_init(); 6211590Srgrimes 6221590Srgrimes /* 6231590Srgrimes * Initialize various variables. 6241590Srgrimes * MAKE also gets this name, for compatibility 6251590Srgrimes * .MAKEFLAGS gets set to the empty string just in case. 6261590Srgrimes * MFLAGS also gets initialized empty, for compatibility. 6271590Srgrimes */ 6281590Srgrimes Var_Set("MAKE", argv[0], VAR_GLOBAL); 6291590Srgrimes Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 6301590Srgrimes Var_Set("MFLAGS", "", VAR_GLOBAL); 6315814Sjkh Var_Set("MACHINE", machine, VAR_GLOBAL); 63244362Simp Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 63372679Skris Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 63497121Sru#ifdef MAKE_VERSION 63597121Sru Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 63697121Sru#endif 6371590Srgrimes 6381590Srgrimes /* 6391590Srgrimes * First snag any flags out of the MAKE environment variable. 6401590Srgrimes * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 6411590Srgrimes * in a different format). 6421590Srgrimes */ 643140870Sharti Main_ParseArgLine(getenv("MAKEFLAGS"), 1); 6448874Srgrimes 6451590Srgrimes MainParseArgs(argc, argv); 6461590Srgrimes 6471590Srgrimes /* 648120053Sru * Find where we are... 649120053Sru * All this code is so that we know where we are when we start up 650120053Sru * on a different machine with pmake. 651120053Sru */ 652120053Sru curdir = cdpath; 653120053Sru if (getcwd(curdir, MAXPATHLEN) == NULL) 654120053Sru err(2, NULL); 655120053Sru 656141252Sharti { 657141252Sharti struct stat sa; 658141252Sharti 659120053Sru if (stat(curdir, &sa) == -1) 660120053Sru err(2, "%s", curdir); 661141252Sharti } 662120053Sru 663120053Sru /* 664120053Sru * The object directory location is determined using the 665120053Sru * following order of preference: 666120053Sru * 667120053Sru * 1. MAKEOBJDIRPREFIX`cwd` 668120053Sru * 2. MAKEOBJDIR 669120053Sru * 3. _PATH_OBJDIR.${MACHINE} 670120053Sru * 4. _PATH_OBJDIR 671120053Sru * 5. _PATH_OBJDIRPREFIX`cwd` 672120053Sru * 673120053Sru * If one of the first two fails, use the current directory. 674120053Sru * If the remaining three all fail, use the current directory. 675120053Sru * 676120053Sru * Once things are initted, 677120053Sru * have to add the original directory to the search path, 678120053Sru * and modify the paths for the Makefiles apropriately. The 679120053Sru * current directory is also placed as a variable for make scripts. 680120053Sru */ 681120053Sru if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 682120053Sru if (!(path = getenv("MAKEOBJDIR"))) { 683120053Sru path = _PATH_OBJDIR; 684120053Sru pathp = _PATH_OBJDIRPREFIX; 685138232Sharti snprintf(mdpath, MAXPATHLEN, "%s.%s", 686120053Sru path, machine); 687120053Sru if (!(objdir = chdir_verify_path(mdpath, obpath))) 688120053Sru if (!(objdir=chdir_verify_path(path, obpath))) { 689138232Sharti snprintf(mdpath, MAXPATHLEN, 690120053Sru "%s%s", pathp, curdir); 691120053Sru if (!(objdir=chdir_verify_path(mdpath, 692120053Sru obpath))) 693120053Sru objdir = curdir; 694120053Sru } 695120053Sru } 696120053Sru else if (!(objdir = chdir_verify_path(path, obpath))) 697120053Sru objdir = curdir; 698120053Sru } 699120053Sru else { 700138232Sharti snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 701120053Sru if (!(objdir = chdir_verify_path(mdpath, obpath))) 702120053Sru objdir = curdir; 703120053Sru } 704120053Sru Dir_InitDot(); /* Initialize the "." directory */ 705120053Sru if (objdir != curdir) 706138916Sharti Dir_AddDir(&dirSearchPath, curdir); 707120053Sru Var_Set(".CURDIR", curdir, VAR_GLOBAL); 708120053Sru Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 709120053Sru 710137606Sphk if (getenv("MAKE_JOBS_FIFO") != NULL) 711137606Sphk forceJobs = TRUE; 712120053Sru /* 71328228Sfsmp * Be compatible if user did not specify -j and did not explicitly 71428228Sfsmp * turned compatibility on 71528228Sfsmp */ 71628228Sfsmp if (!compatMake && !forceJobs) 71728228Sfsmp compatMake = TRUE; 71828228Sfsmp 71928228Sfsmp /* 7201590Srgrimes * Initialize archive, target and suffix modules in preparation for 7211590Srgrimes * parsing the makefile(s) 7221590Srgrimes */ 7231590Srgrimes Arch_Init(); 7241590Srgrimes Targ_Init(); 7251590Srgrimes Suff_Init(); 7261590Srgrimes 72769527Swill DEFAULT = NULL; 728138232Sharti time(&now); 7291590Srgrimes 7301590Srgrimes /* 7311590Srgrimes * Set up the .TARGETS variable to contain the list of targets to be 7321590Srgrimes * created. If none specified, make the variable empty -- the parser 7331590Srgrimes * will fill the thing in with the default or .MAIN target. 7341590Srgrimes */ 735138916Sharti if (!Lst_IsEmpty(&create)) { 736138512Sharti LstNode *ln; 7371590Srgrimes 738138916Sharti for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { 739138264Sharti char *name = Lst_Datum(ln); 7401590Srgrimes 7411590Srgrimes Var_Append(".TARGETS", name, VAR_GLOBAL); 7421590Srgrimes } 7431590Srgrimes } else 7441590Srgrimes Var_Set(".TARGETS", "", VAR_GLOBAL); 7451590Srgrimes 74618730Ssteve 7471590Srgrimes /* 74818730Ssteve * If no user-supplied system path was given (through the -m option) 74918730Ssteve * add the directories from the DEFSYSPATH (more than one may be given 75018730Ssteve * as dir1:...:dirn) to the system include path. 7511590Srgrimes */ 752138916Sharti if (Lst_IsEmpty(&sysIncPath)) { 75318730Ssteve for (start = syspath; *start != '\0'; start = cp) { 75418730Ssteve for (cp = start; *cp != '\0' && *cp != ':'; cp++) 75518730Ssteve continue; 75618730Ssteve if (*cp == '\0') { 757138916Sharti Dir_AddDir(&sysIncPath, start); 75818730Ssteve } else { 75918730Ssteve *cp++ = '\0'; 760138916Sharti Dir_AddDir(&sysIncPath, start); 76118730Ssteve } 76218730Ssteve } 76318730Ssteve } 7641590Srgrimes 76518730Ssteve /* 76618730Ssteve * Read in the built-in rules first, followed by the specified 76718730Ssteve * makefile, if it was (makefile != (char *) NULL), or the default 76818730Ssteve * Makefile and makefile, in that order, if it wasn't. 76918730Ssteve */ 77018730Ssteve if (!noBuiltins) { 771138916Sharti /* Path of sys.mk */ 772138916Sharti Lst sysMkPath = Lst_Initializer(sysMkPath); 773138512Sharti LstNode *ln; 77418730Ssteve 775138916Sharti Dir_Expand(_PATH_DEFSYSMK, &sysIncPath, &sysMkPath); 776138916Sharti if (Lst_IsEmpty(&sysMkPath)) 77718730Ssteve Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 778138916Sharti ln = Lst_Find(&sysMkPath, NULL, ReadMakefile); 77969527Swill if (ln != NULL) 78018730Ssteve Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 781138916Sharti Lst_Destroy(&sysMkPath, free); 78218730Ssteve } 78318730Ssteve 784138916Sharti if (!Lst_IsEmpty(&makefiles)) { 785138512Sharti LstNode *ln; 7861590Srgrimes 787138916Sharti ln = Lst_Find(&makefiles, NULL, ReadMakefile); 78869527Swill if (ln != NULL) 7891590Srgrimes Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 79094594Sobrien } else if (!ReadMakefile("BSDmakefile", NULL)) 79194594Sobrien if (!ReadMakefile("makefile", NULL)) 792138232Sharti ReadMakefile("Makefile", NULL); 7931590Srgrimes 794138232Sharti ReadMakefile(".depend", NULL); 7951590Srgrimes 7961590Srgrimes /* Install all the flags into the MAKE envariable. */ 7975814Sjkh if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 7981590Srgrimes setenv("MAKEFLAGS", p, 1); 799105826Sjmallett free(p1); 8001590Srgrimes 8011590Srgrimes /* 8021590Srgrimes * For compatibility, look at the directories in the VPATH variable 8031590Srgrimes * and add them to the search path, if the variable is defined. The 8041590Srgrimes * variable's value is in the same format as the PATH envariable, i.e. 8051590Srgrimes * <directory>:<directory>:<directory>... 8061590Srgrimes */ 8071590Srgrimes if (Var_Exists("VPATH", VAR_CMD)) { 8081590Srgrimes /* 8091590Srgrimes * GCC stores string constants in read-only memory, but 8101590Srgrimes * Var_Subst will want to write this thing, so store it 8111590Srgrimes * in an array 8121590Srgrimes */ 8131590Srgrimes static char VPATH[] = "${VPATH}"; 814141969Sharti char *vpath; 815141969Sharti char *start; 816141969Sharti char *ptr; 817141969Sharti char savec; 8181590Srgrimes 8191590Srgrimes vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 820141969Sharti start = vpath; 8211590Srgrimes do { 8221590Srgrimes /* skip to end of directory */ 823141969Sharti for (ptr = start; *ptr != ':' && *ptr != '\0'; ptr++) 824141969Sharti ; 825141969Sharti 8261590Srgrimes /* Save terminator character so know when to stop */ 827141969Sharti savec = *ptr; 828141969Sharti *ptr = '\0'; 829141969Sharti 8301590Srgrimes /* Add directory to search path */ 831141969Sharti Dir_AddDir(&dirSearchPath, start); 832141969Sharti 833141969Sharti start = ptr + 1; 834141969Sharti } while (savec != '\0'); 835138232Sharti free(vpath); 8361590Srgrimes } 8371590Srgrimes 8381590Srgrimes /* 8391590Srgrimes * Now that all search paths have been read for suffixes et al, it's 8401590Srgrimes * time to add the default search path to their lists... 8411590Srgrimes */ 8421590Srgrimes Suff_DoPaths(); 8431590Srgrimes 8441590Srgrimes /* print the initial graph, if the user requested it */ 8451590Srgrimes if (DEBUG(GRAPH1)) 8461590Srgrimes Targ_PrintGraph(1); 8471590Srgrimes 84817193Sbde /* print the values of any variables requested by the user */ 849141974Sharti if (Lst_IsEmpty(&variables)) { 8501590Srgrimes /* 851141974Sharti * Since the user has not requested that any variables 852141974Sharti * be printed, we can built targets. 853141974Sharti * 854141974Sharti * Have red the entire graph and need to make a list of targets 855141974Sharti * to create. If none was given on the command line, we consult 856141974Sharti * the parsing module to find the main target(s) to create. 8571590Srgrimes */ 858138916Sharti Lst targs = Lst_Initializer(targs); 859138916Sharti 860138916Sharti if (Lst_IsEmpty(&create)) 861138916Sharti Parse_MainName(&targs); 862101460Sru else 863138916Sharti Targ_FindList(&targs, &create, TARG_CREATE); 864101460Sru 865141974Sharti if (compatMake) { 866101460Sru /* 867141974Sharti * Compat_Init will take care of creating 868141974Sharti * all the targets as well as initializing 869141974Sharti * the module. 870101460Sru */ 871141974Sharti Compat_Run(&targs); 872141974Sharti outOfDate = 0; 873141974Sharti } else { 874141974Sharti /* 875141974Sharti * Initialize job module before traversing 876141974Sharti * the graph, now that any .BEGIN and .END 877141974Sharti * targets have been read. This is done 878141974Sharti * only if the -q flag wasn't given (to 879141974Sharti * prevent the .BEGIN from being executed 880141974Sharti * should it exist). 881141974Sharti */ 882101460Sru if (!queryFlag) { 883137572Sphk Job_Init(maxJobs); 884101460Sru jobsRunning = TRUE; 885101460Sru } 886101460Sru 887101460Sru /* Traverse the graph, checking on all the targets */ 888138916Sharti outOfDate = Make_Run(&targs); 8891590Srgrimes } 890138916Sharti Lst_Destroy(&targs, NOFREE); 891141974Sharti 892141974Sharti } else { 893141974Sharti /* 894141974Sharti * Print the values of any variables requested by 895141974Sharti * the user. 896141974Sharti */ 897141974Sharti LstNode *ln; 898141974Sharti const char *name; 899141974Sharti char *v; 900141974Sharti char *value; 901141974Sharti 902141974Sharti for (ln = Lst_First(&variables); ln != NULL; 903141974Sharti ln = Lst_Succ(ln)) { 904141974Sharti name = Lst_Datum(ln); 905141974Sharti if (expandVars) { 906141974Sharti v = emalloc(strlen(name) + 1 + 3); 907141974Sharti sprintf(v, "${%s}", name); 908141974Sharti 909141974Sharti value = Var_Subst(NULL, v, VAR_GLOBAL, FALSE); 910141974Sharti } else { 911141974Sharti value = Var_Value(name, VAR_GLOBAL, &v); 912141974Sharti } 913141974Sharti printf("%s\n", value != NULL ? value : ""); 914141974Sharti if (v != NULL) 915141974Sharti free(v); 916141974Sharti } 91717193Sbde } 9188874Srgrimes 919138920Sru Lst_Destroy(&variables, free); 920138920Sru Lst_Destroy(&makefiles, free); 921138916Sharti Lst_Destroy(&create, free); 9225814Sjkh 9231590Srgrimes /* print the graph now it's been processed if the user requested it */ 9241590Srgrimes if (DEBUG(GRAPH2)) 9251590Srgrimes Targ_PrintGraph(2); 9261590Srgrimes 9271590Srgrimes if (queryFlag && outOfDate) 928138232Sharti return (1); 9291590Srgrimes else 930138232Sharti return (0); 9311590Srgrimes} 9321590Srgrimes 9331590Srgrimes/*- 9341590Srgrimes * ReadMakefile -- 9351590Srgrimes * Open and parse the given makefile. 9361590Srgrimes * 9371590Srgrimes * Results: 9381590Srgrimes * TRUE if ok. FALSE if couldn't open file. 9391590Srgrimes * 9401590Srgrimes * Side Effects: 9411590Srgrimes * lots 9421590Srgrimes */ 9431590Srgrimesstatic Boolean 944138561ShartiReadMakefile(const void *p, const void *q __unused) 9451590Srgrimes{ 946104696Sjmallett char *fname; /* makefile to read */ 9471590Srgrimes FILE *stream; 94873262Simp char *name, path[MAXPATHLEN]; 94997163Sjmallett char *MAKEFILE; 95094990Sru int setMAKEFILE; 9511590Srgrimes 952138561Sharti /* XXX - remove this once constification is done */ 953138561Sharti fname = estrdup(p); 954104696Sjmallett 9551590Srgrimes if (!strcmp(fname, "-")) { 9561590Srgrimes Parse_File("(stdin)", stdin); 9571590Srgrimes Var_Set("MAKEFILE", "", VAR_GLOBAL); 9581590Srgrimes } else { 95994990Sru setMAKEFILE = strcmp(fname, ".depend"); 96094990Sru 9611590Srgrimes /* if we've chdir'd, rebuild the path name */ 9621590Srgrimes if (curdir != objdir && *fname != '/') { 963138232Sharti snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 964100733Simp /* 965100733Simp * XXX The realpath stuff breaks relative includes 966100733Simp * XXX in some cases. The problem likely is in 967100733Simp * XXX parse.c where it does special things in 968100733Simp * XXX ParseDoInclude if the file is relateive 969100733Simp * XXX or absolute and not a system file. There 970100733Simp * XXX it assumes that if the current file that's 971100733Simp * XXX being included is absolute, that any files 972100733Simp * XXX that it includes shouldn't do the -I path 973100733Simp * XXX stuff, which is inconsistant with historical 974100733Simp * XXX behavior. However, I can't pentrate the mists 975100733Simp * XXX further, so I'm putting this workaround in 976100733Simp * XXX here until such time as the underlying bug 977100733Simp * XXX can be fixed. 978100733Simp */ 979100733Simp#if THIS_BREAKS_THINGS 98097077Sjmallett if (realpath(path, path) != NULL && 98197077Sjmallett (stream = fopen(path, "r")) != NULL) { 98297163Sjmallett MAKEFILE = fname; 9831590Srgrimes fname = path; 9841590Srgrimes goto found; 9851590Srgrimes } 98697077Sjmallett } else if (realpath(fname, path) != NULL) { 98797163Sjmallett MAKEFILE = fname; 98897077Sjmallett fname = path; 98997077Sjmallett if ((stream = fopen(fname, "r")) != NULL) 99097077Sjmallett goto found; 99197077Sjmallett } 992100733Simp#else 993100733Simp if ((stream = fopen(path, "r")) != NULL) { 994100733Simp MAKEFILE = fname; 995100733Simp fname = path; 996100733Simp goto found; 997100733Simp } 998100733Simp } else { 999100733Simp MAKEFILE = fname; 1000100733Simp if ((stream = fopen(fname, "r")) != NULL) 1001100733Simp goto found; 1002100733Simp } 1003100733Simp#endif 10041590Srgrimes /* look in -I and system include directories. */ 1005138916Sharti name = Dir_FindFile(fname, &parseIncPath); 10061590Srgrimes if (!name) 1007138916Sharti name = Dir_FindFile(fname, &sysIncPath); 10081590Srgrimes if (!name || !(stream = fopen(name, "r"))) 1009138232Sharti return (FALSE); 101097163Sjmallett MAKEFILE = fname = name; 10111590Srgrimes /* 10121590Srgrimes * set the MAKEFILE variable desired by System V fans -- the 10131590Srgrimes * placement of the setting here means it gets set to the last 10141590Srgrimes * makefile specified, as it is set by SysV make. 10151590Srgrimes */ 101694990Srufound: 101794990Sru if (setMAKEFILE) 101897163Sjmallett Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); 10191590Srgrimes Parse_File(fname, stream); 1020138232Sharti fclose(stream); 10211590Srgrimes } 1022138232Sharti return (TRUE); 10231590Srgrimes} 10241590Srgrimes 10251590Srgrimes/*- 102618730Ssteve * Cmd_Exec -- 102718730Ssteve * Execute the command in cmd, and return the output of that command 102818730Ssteve * in a string. 102918730Ssteve * 103018730Ssteve * Results: 103118730Ssteve * A string containing the output of the command, or the empty string 1032104121Sjmallett * If error is not NULL, it contains the reason for the command failure 103318730Ssteve * 103418730Ssteve * Side Effects: 103518730Ssteve * The string must be freed by the caller. 103618730Ssteve */ 1037141454ShartiBuffer * 1038141252ShartiCmd_Exec(char *cmd, const char **error) 103918730Ssteve{ 104018730Ssteve int fds[2]; /* Pipe streams */ 104118730Ssteve int cpid; /* Child PID */ 104218730Ssteve int pid; /* PID from wait() */ 104318730Ssteve int status; /* command exit status */ 1044141133Sharti Buffer *buf; /* buffer to store the result */ 1045141454Sharti ssize_t rcnt; 104618730Ssteve 1047104121Sjmallett *error = NULL; 1048141454Sharti buf = Buf_Init(0); 104918730Ssteve 1050136840Sru if (shellPath == NULL) 1051136840Sru Shell_Init(); 105218730Ssteve /* 105318730Ssteve * Open a pipe for fetching its output 105418730Ssteve */ 105518730Ssteve if (pipe(fds) == -1) { 1056104121Sjmallett *error = "Couldn't create pipe for \"%s\""; 1057141454Sharti return (buf); 105818730Ssteve } 105918730Ssteve 106018730Ssteve /* 106118730Ssteve * Fork 106218730Ssteve */ 106318730Ssteve switch (cpid = vfork()) { 106418730Ssteve case 0: 106518730Ssteve /* 106618730Ssteve * Close input side of pipe 106718730Ssteve */ 1068138232Sharti close(fds[0]); 106918730Ssteve 107018730Ssteve /* 107118730Ssteve * Duplicate the output stream to the shell's output, then 107218730Ssteve * shut the extra thing down. Note we don't fetch the error 107318730Ssteve * stream...why not? Why? 107418730Ssteve */ 1075138232Sharti dup2(fds[1], 1); 1076138232Sharti close(fds[1]); 107718730Ssteve 1078141454Sharti { 1079141454Sharti char *args[4]; 108018730Ssteve 1081141454Sharti /* Set up arguments for shell */ 1082141454Sharti args[0] = shellName; 1083141454Sharti args[1] = "-c"; 1084141454Sharti args[2] = cmd; 1085141454Sharti args[3] = NULL; 1086141454Sharti 1087141454Sharti execv(shellPath, args); 1088141454Sharti _exit(1); 1089141454Sharti /*NOTREACHED*/ 1090141454Sharti } 1091141454Sharti 109218730Ssteve case -1: 1093104121Sjmallett *error = "Couldn't exec \"%s\""; 1094141454Sharti return (buf); 109518730Ssteve 109618730Ssteve default: 109718730Ssteve /* 109818730Ssteve * No need for the writing half 109918730Ssteve */ 1100138232Sharti close(fds[1]); 110118730Ssteve 110218730Ssteve do { 110318730Ssteve char result[BUFSIZ]; 1104138346Sharti rcnt = read(fds[0], result, sizeof(result)); 1105138346Sharti if (rcnt != -1) 1106138346Sharti Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result); 1107138346Sharti } while (rcnt > 0 || (rcnt == -1 && errno == EINTR)); 1108141454Sharti 1109141454Sharti if (rcnt == -1) 1110141454Sharti *error = "Error reading shell's output for \"%s\""; 1111141454Sharti 111218730Ssteve /* 111318730Ssteve * Close the input side of the pipe. 111418730Ssteve */ 1115138232Sharti close(fds[0]); 111618730Ssteve 111718730Ssteve /* 111818730Ssteve * Wait for the process to exit. 111918730Ssteve */ 1120138232Sharti while (((pid = wait(&status)) != cpid) && (pid >= 0)) 112118730Ssteve continue; 112218730Ssteve 112318730Ssteve if (status) 1124104121Sjmallett *error = "\"%s\" returned non-zero status"; 112518730Ssteve 1126141454Sharti Buf_StripNewlines(buf); 112718730Ssteve 112818730Ssteve break; 112918730Ssteve } 1130141454Sharti return (buf); 113118730Ssteve} 113218730Ssteve 11331590Srgrimes/* 11341590Srgrimes * usage -- 11351590Srgrimes * exit with usage message 11361590Srgrimes */ 11371590Srgrimesstatic void 1138104696Sjmallettusage(void) 11391590Srgrimes{ 1140138232Sharti fprintf(stderr, "%s\n%s\n%s\n", 1141113512Sru"usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", 1142113512Sru" [-E variable] [-f makefile] [-I directory] [-j max_jobs]", 1143113512Sru" [-m directory] [-V variable] [variable=value] [target ...]"); 11441590Srgrimes exit(2); 11451590Srgrimes} 1146