/*- * Copyright (c) 1988, 1989, 1990, 1993 * The Regents of the University of California. All rights reserved. * Copyright (c) 1989 by Berkeley Softworks * All rights reserved. * * This code is derived from software contributed to Berkeley by * Adam de Boor. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)main.c 8.3 (Berkeley) 3/19/94 */ #ifndef lint #if 0 static char copyright[] = "@(#) Copyright (c) 1988, 1989, 1990, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif #endif /* not lint */ #include __FBSDID("$FreeBSD$"); /*- * main.c -- * The main file for this entire program. Exit routines etc * reside here. * * Utility functions defined in this file: * Main_ParseArgLine Takes a line of arguments, breaks them and * treats them as if they were given when first * invoked. Used by the parse module to implement * the .MFLAGS target. */ #ifndef MACHINE #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include "arch.h" #include "buf.h" #include "compat.h" #include "config.h" #include "dir.h" #include "globals.h" #include "job.h" #include "make.h" #include "nonints.h" #include "parse.h" #include "pathnames.h" #include "str.h" #include "suff.h" #include "targ.h" #include "util.h" #include "var.h" #define WANT_ENV_MKLVL 1 #define MKLVL_MAXVAL 500 #define MKLVL_ENVVAR "__MKLVL__" #define MAKEFLAGS ".MAKEFLAGS" /* Targets to be made */ Lst create = Lst_Initializer(create); time_t now; /* Time at start of make */ struct GNode *DEFAULT; /* .DEFAULT node */ Boolean allPrecious; /* .PRECIOUS given on line by itself */ static Boolean noBuiltins; /* -r flag */ /* ordered list of makefiles to read */ static Lst makefiles = Lst_Initializer(makefiles); static Boolean expandVars; /* fully expand printed variables */ /* list of variables to print */ static Lst variables = Lst_Initializer(variables); int maxJobs; /* -j argument */ static Boolean forceJobs; /* -j argument given */ Boolean compatMake; /* -B argument */ Boolean debug; /* -d flag */ Boolean noExecute; /* -n flag */ Boolean keepgoing; /* -k flag */ Boolean queryFlag; /* -q flag */ Boolean touchFlag; /* -t flag */ Boolean usePipes; /* !-P flag */ Boolean ignoreErrors; /* -i flag */ Boolean beSilent; /* -s flag */ Boolean beVerbose; /* -v flag */ Boolean oldVars; /* variable substitution style */ Boolean checkEnvFirst; /* -e flag */ /* (-E) vars to override from env */ Lst envFirstVars = Lst_Initializer(envFirstVars); Boolean jobsRunning; /* TRUE if the jobs might be running */ static void MainParseArgs(int, char **); char *chdir_verify_path(const char *, char *); static int ReadMakefile(const void *, const void *); static void usage(void); static char *curdir; /* startup directory */ static char *objdir; /* where we chdir'ed to */ /* * Append a flag with an optional argument to MAKEFLAGS and MFLAGS */ static void MFLAGS_append(const char *flag, char *arg) { char *str; Var_Append(MAKEFLAGS, flag, VAR_GLOBAL); if (arg != NULL) { str = MAKEFLAGS_quote(arg); Var_Append(MAKEFLAGS, str, VAR_GLOBAL); free(str); } Var_Append("MFLAGS", flag, VAR_GLOBAL); if (arg != NULL) { str = MAKEFLAGS_quote(arg); Var_Append("MFLAGS", str, VAR_GLOBAL); free(str); } } /*- * MainParseArgs -- * Parse a given argument vector. Called from main() and from * Main_ParseArgLine() when the .MAKEFLAGS target is used. * * XXX: Deal with command line overriding .MAKEFLAGS in makefile * * Results: * None * * Side Effects: * Various global and local flags will be set depending on the flags * given */ static void MainParseArgs(int argc, char **argv) { int c; optind = 1; /* since we're called more than once */ #define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { switch(c) { case 'C': if (chdir(optarg) == -1) err(1, "chdir %s", optarg); break; case 'D': Var_Set(optarg, "1", VAR_GLOBAL); MFLAGS_append("-D", optarg); break; case 'I': Parse_AddIncludeDir(optarg); MFLAGS_append("-I", optarg); break; case 'V': Lst_AtEnd(&variables, estrdup(optarg)); MFLAGS_append("-V", optarg); break; case 'X': expandVars = FALSE; break; case 'B': compatMake = TRUE; MFLAGS_append("-B", NULL); unsetenv("MAKE_JOBS_FIFO"); break; case 'P': usePipes = FALSE; MFLAGS_append("-P", NULL); break; case 'S': keepgoing = FALSE; MFLAGS_append("-S", NULL); break; case 'd': { char *modules = optarg; for (; *modules; ++modules) switch (*modules) { case 'A': debug = ~0; break; case 'a': debug |= DEBUG_ARCH; break; case 'c': debug |= DEBUG_COND; break; case 'd': debug |= DEBUG_DIR; break; case 'f': debug |= DEBUG_FOR; break; case 'g': if (modules[1] == '1') { debug |= DEBUG_GRAPH1; ++modules; } else if (modules[1] == '2') { debug |= DEBUG_GRAPH2; ++modules; } break; case 'j': debug |= DEBUG_JOB; break; case 'l': debug |= DEBUG_LOUD; break; case 'm': debug |= DEBUG_MAKE; break; case 's': debug |= DEBUG_SUFF; break; case 't': debug |= DEBUG_TARG; break; case 'v': debug |= DEBUG_VAR; break; default: warnx("illegal argument to d option -- %c", *modules); usage(); } MFLAGS_append("-d", optarg); break; } case 'E': Lst_AtEnd(&envFirstVars, estrdup(optarg)); MFLAGS_append("-E", optarg); break; case 'e': checkEnvFirst = TRUE; MFLAGS_append("-e", NULL); break; case 'f': Lst_AtEnd(&makefiles, estrdup(optarg)); break; case 'i': ignoreErrors = TRUE; MFLAGS_append("-i", NULL); break; case 'j': { char *endptr; forceJobs = TRUE; maxJobs = strtol(optarg, &endptr, 10); if (maxJobs <= 0 || *endptr != '\0') { warnx("illegal number, -j argument -- %s", optarg); usage(); } MFLAGS_append("-j", optarg); break; } case 'k': keepgoing = TRUE; MFLAGS_append("-k", NULL); break; case 'm': Dir_AddDir(&sysIncPath, optarg); MFLAGS_append("-m", optarg); break; case 'n': noExecute = TRUE; MFLAGS_append("-n", NULL); break; case 'q': queryFlag = TRUE; /* Kind of nonsensical, wot? */ MFLAGS_append("-q", NULL); break; case 'r': noBuiltins = TRUE; MFLAGS_append("-r", NULL); break; case 's': beSilent = TRUE; MFLAGS_append("-s", NULL); break; case 't': touchFlag = TRUE; MFLAGS_append("-t", NULL); break; case 'v': beVerbose = TRUE; MFLAGS_append("-v", NULL); break; default: case '?': usage(); } } oldVars = TRUE; /* * See if the rest of the arguments are variable assignments and * perform them if so. Else take them to be targets and stuff them * on the end of the "create" list. */ for (argv += optind, argc -= optind; *argv; ++argv, --argc) if (Parse_IsVar(*argv)) { char *ptr = MAKEFLAGS_quote(*argv); Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL); free(ptr); Parse_DoVar(*argv, VAR_CMD); } else { if (!**argv) Punt("illegal (null) argument."); if (**argv == '-') { if ((*argv)[1]) optind = 0; /* -flag... */ else optind = 1; /* - */ goto rearg; } Lst_AtEnd(&create, estrdup(*argv)); } } /*- * Main_ParseArgLine -- * Used by the parse module when a .MFLAGS or .MAKEFLAGS target * is encountered and by main() when reading the .MAKEFLAGS envariable. * Takes a line of arguments and breaks it into its * component words and passes those words and the number of them to the * MainParseArgs function. * The line should have all its leading whitespace removed. * * Results: * None * * Side Effects: * Only those that come from the various arguments. */ void Main_ParseArgLine(char *line, int mflags) { char **argv; /* Manufactured argument vector */ int argc; /* Number of arguments in argv */ if (line == NULL) return; for (; *line == ' '; ++line) continue; if (!*line) return; if (mflags) argv = MAKEFLAGS_break(line, &argc); else argv = brk_string(line, &argc, TRUE); MainParseArgs(argc, argv); } char * chdir_verify_path(const char *path, char *obpath) { struct stat sb; if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { warn("warning: %s", path); return (NULL); } return (obpath); } return (NULL); } static void catch_child(int sig __unused) { } /* * In lieu of a good way to prevent every possible looping in * make(1), stop there from being more than MKLVL_MAXVAL processes forked * by make(1), to prevent a forkbomb from happening, in a dumb and * mechanical way. */ static void check_make_level(void) { #ifdef WANT_ENV_MKLVL char *value = getenv(MKLVL_ENVVAR); int level = (value == NULL) ? 0 : atoi(value); if (level < 0) { errc(2, EAGAIN, "Invalid value for recursion level (%d).", level); } else if (level > MKLVL_MAXVAL) { errc(2, EAGAIN, "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); } else { char new_value[32]; sprintf(new_value, "%d", level + 1); setenv(MKLVL_ENVVAR, new_value, 1); } #endif /* WANT_ENV_MKLVL */ } /*- * main -- * The main function, for obvious reasons. Initializes variables * and a few modules, then parses the arguments give it in the * environment and on the command line. Reads the system makefile * followed by either Makefile, makefile or the file given by the * -f argument. Sets the .MAKEFLAGS PMake variable based on all the * flags it has received by then uses either the Make or the Compat * module to create the initial list of targets. * * Results: * If -q was given, exits -1 if anything was out-of-date. Else it exits * 0. * * Side Effects: * The program exits when done. Targets are created. etc. etc. etc. */ int main(int argc, char **argv) { Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ char *p, *p1, *pathp; char *path; char mdpath[MAXPATHLEN]; char obpath[MAXPATHLEN]; char cdpath[MAXPATHLEN]; const char *machine = getenv("MACHINE"); const char *machine_arch = getenv("MACHINE_ARCH"); const char *machine_cpu = getenv("MACHINE_CPU"); char *cp = NULL, *start; /* avoid faults on read-only strings */ static char syspath[] = _PATH_DEFSYSPATH; { /* * Catch SIGCHLD so that we get kicked out of select() when we * need to look at a child. This is only known to matter for the * -j case (perhaps without -P). * * XXX this is intentionally misplaced. */ struct sigaction sa; sigemptyset(&sa.sa_mask); sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; sa.sa_handler = catch_child; sigaction(SIGCHLD, &sa, NULL); } check_make_level(); #if DEFSHELL == 2 /* * Turn off ENV to make ksh happier. */ unsetenv("ENV"); #endif #ifdef RLIMIT_NOFILE /* * get rid of resource limit on file descriptors */ { struct rlimit rl; if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && rl.rlim_cur != rl.rlim_max) { rl.rlim_cur = rl.rlim_max; setrlimit(RLIMIT_NOFILE, &rl); } } #endif /* * PC-98 kernel sets the `i386' string to the utsname.machine and * it cannot be distinguished from IBM-PC by uname(3). Therefore, * we check machine.ispc98 and adjust the machine variable before * using usname(3) below. * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, * __FreeBSD_version was defined as 300003. So, this check can * safely be done with any kernel with version > 300003. */ if (!machine) { int ispc98; size_t len; len = sizeof(ispc98); if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { if (ispc98) machine = "pc98"; } } /* * Get the name of this type of MACHINE from utsname * so we can share an executable for similar machines. * (i.e. m68k: amiga hp300, mac68k, sun3, ...) * * Note that while MACHINE is decided at run-time, * MACHINE_ARCH is always known at compile time. */ if (!machine) { #ifndef MACHINE struct utsname utsname; if (uname(&utsname) == -1) err(2, "uname"); machine = utsname.machine; #else machine = MACHINE; #endif } if (!machine_arch) { #ifndef MACHINE_ARCH machine_arch = "unknown"; #else machine_arch = MACHINE_ARCH; #endif } /* * Set machine_cpu to the minumum supported CPU revision based * on the target architecture, if not already set. */ if (!machine_cpu) { if (!strcmp(machine_arch, "i386")) machine_cpu = "i386"; else if (!strcmp(machine_arch, "alpha")) machine_cpu = "ev4"; else machine_cpu = "unknown"; } expandVars = TRUE; beSilent = FALSE; /* Print commands as executed */ ignoreErrors = FALSE; /* Pay attention to non-zero returns */ noExecute = FALSE; /* Execute all commands */ keepgoing = FALSE; /* Stop on error */ allPrecious = FALSE; /* Remove targets when interrupted */ queryFlag = FALSE; /* This is not just a check-run */ noBuiltins = FALSE; /* Read the built-in rules */ touchFlag = FALSE; /* Actually update targets */ usePipes = TRUE; /* Catch child output in pipes */ debug = 0; /* No debug verbosity, please. */ jobsRunning = FALSE; maxJobs = DEFMAXJOBS; forceJobs = FALSE; /* No -j flag */ compatMake = FALSE; /* No compat mode */ /* * Initialize the parsing, directory and variable modules to prepare * for the reading of inclusion paths and variable settings on the * command line */ Dir_Init(); /* Initialize directory structures so -I flags * can be processed correctly */ Parse_Init(); /* Need to initialize the paths of #include * directories */ Var_Init(); /* As well as the lists of variables for * parsing arguments */ str_init(); /* * Initialize various variables. * MAKE also gets this name, for compatibility * .MAKEFLAGS gets set to the empty string just in case. * MFLAGS also gets initialized empty, for compatibility. */ Var_Set("MAKE", argv[0], VAR_GLOBAL); Var_Set(MAKEFLAGS, "", VAR_GLOBAL); Var_Set("MFLAGS", "", VAR_GLOBAL); Var_Set("MACHINE", machine, VAR_GLOBAL); Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); #ifdef MAKE_VERSION Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); #endif /* * First snag any flags out of the MAKE environment variable. * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's * in a different format). */ Main_ParseArgLine(getenv("MAKEFLAGS"), 1); MainParseArgs(argc, argv); /* * Find where we are... * All this code is so that we know where we are when we start up * on a different machine with pmake. */ curdir = cdpath; if (getcwd(curdir, MAXPATHLEN) == NULL) err(2, NULL); { struct stat sa; if (stat(curdir, &sa) == -1) err(2, "%s", curdir); } /* * The object directory location is determined using the * following order of preference: * * 1. MAKEOBJDIRPREFIX`cwd` * 2. MAKEOBJDIR * 3. _PATH_OBJDIR.${MACHINE} * 4. _PATH_OBJDIR * 5. _PATH_OBJDIRPREFIX`cwd` * * If one of the first two fails, use the current directory. * If the remaining three all fail, use the current directory. * * Once things are initted, * have to add the original directory to the search path, * and modify the paths for the Makefiles apropriately. The * current directory is also placed as a variable for make scripts. */ if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { if (!(path = getenv("MAKEOBJDIR"))) { path = _PATH_OBJDIR; pathp = _PATH_OBJDIRPREFIX; snprintf(mdpath, MAXPATHLEN, "%s.%s", path, machine); if (!(objdir = chdir_verify_path(mdpath, obpath))) if (!(objdir=chdir_verify_path(path, obpath))) { snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); if (!(objdir=chdir_verify_path(mdpath, obpath))) objdir = curdir; } } else if (!(objdir = chdir_verify_path(path, obpath))) objdir = curdir; } else { snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); if (!(objdir = chdir_verify_path(mdpath, obpath))) objdir = curdir; } Dir_InitDot(); /* Initialize the "." directory */ if (objdir != curdir) Dir_AddDir(&dirSearchPath, curdir); Var_Set(".CURDIR", curdir, VAR_GLOBAL); Var_Set(".OBJDIR", objdir, VAR_GLOBAL); if (getenv("MAKE_JOBS_FIFO") != NULL) forceJobs = TRUE; /* * Be compatible if user did not specify -j and did not explicitly * turned compatibility on */ if (!compatMake && !forceJobs) compatMake = TRUE; /* * Initialize archive, target and suffix modules in preparation for * parsing the makefile(s) */ Arch_Init(); Targ_Init(); Suff_Init(); DEFAULT = NULL; time(&now); /* * Set up the .TARGETS variable to contain the list of targets to be * created. If none specified, make the variable empty -- the parser * will fill the thing in with the default or .MAIN target. */ if (!Lst_IsEmpty(&create)) { LstNode *ln; for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { char *name = Lst_Datum(ln); Var_Append(".TARGETS", name, VAR_GLOBAL); } } else Var_Set(".TARGETS", "", VAR_GLOBAL); /* * If no user-supplied system path was given (through the -m option) * add the directories from the DEFSYSPATH (more than one may be given * as dir1:...:dirn) to the system include path. */ if (Lst_IsEmpty(&sysIncPath)) { for (start = syspath; *start != '\0'; start = cp) { for (cp = start; *cp != '\0' && *cp != ':'; cp++) continue; if (*cp == '\0') { Dir_AddDir(&sysIncPath, start); } else { *cp++ = '\0'; Dir_AddDir(&sysIncPath, start); } } } /* * Read in the built-in rules first, followed by the specified * makefile, if it was (makefile != (char *) NULL), or the default * Makefile and makefile, in that order, if it wasn't. */ if (!noBuiltins) { /* Path of sys.mk */ Lst sysMkPath = Lst_Initializer(sysMkPath); LstNode *ln; Dir_Expand(_PATH_DEFSYSMK, &sysIncPath, &sysMkPath); if (Lst_IsEmpty(&sysMkPath)) Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); ln = Lst_Find(&sysMkPath, NULL, ReadMakefile); if (ln != NULL) Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); Lst_Destroy(&sysMkPath, free); } if (!Lst_IsEmpty(&makefiles)) { LstNode *ln; ln = Lst_Find(&makefiles, NULL, ReadMakefile); if (ln != NULL) Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); } else if (!ReadMakefile("BSDmakefile", NULL)) if (!ReadMakefile("makefile", NULL)) ReadMakefile("Makefile", NULL); ReadMakefile(".depend", NULL); /* Install all the flags into the MAKE envariable. */ if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) setenv("MAKEFLAGS", p, 1); free(p1); /* * For compatibility, look at the directories in the VPATH variable * and add them to the search path, if the variable is defined. The * variable's value is in the same format as the PATH envariable, i.e. * ::... */ if (Var_Exists("VPATH", VAR_CMD)) { /* * GCC stores string constants in read-only memory, but * Var_Subst will want to write this thing, so store it * in an array */ static char VPATH[] = "${VPATH}"; char *vpath; char *start; char *ptr; char savec; vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); start = vpath; do { /* skip to end of directory */ for (ptr = start; *ptr != ':' && *ptr != '\0'; ptr++) ; /* Save terminator character so know when to stop */ savec = *ptr; *ptr = '\0'; /* Add directory to search path */ Dir_AddDir(&dirSearchPath, start); start = ptr + 1; } while (savec != '\0'); free(vpath); } /* * Now that all search paths have been read for suffixes et al, it's * time to add the default search path to their lists... */ Suff_DoPaths(); /* print the initial graph, if the user requested it */ if (DEBUG(GRAPH1)) Targ_PrintGraph(1); /* print the values of any variables requested by the user */ if (Lst_IsEmpty(&variables)) { /* * Since the user has not requested that any variables * be printed, we can build targets. * * Have read the entire graph and need to make a list of targets * to create. If none was given on the command line, we consult * the parsing module to find the main target(s) to create. */ Lst targs = Lst_Initializer(targs); if (Lst_IsEmpty(&create)) Parse_MainName(&targs); else Targ_FindList(&targs, &create, TARG_CREATE); if (compatMake) { /* * Compat_Init will take care of creating * all the targets as well as initializing * the module. */ Compat_Run(&targs); outOfDate = 0; } else { /* * Initialize job module before traversing * the graph, now that any .BEGIN and .END * targets have been read. This is done * only if the -q flag wasn't given (to * prevent the .BEGIN from being executed * should it exist). */ if (!queryFlag) { Job_Init(maxJobs); jobsRunning = TRUE; } /* Traverse the graph, checking on all the targets */ outOfDate = Make_Run(&targs); } Lst_Destroy(&targs, NOFREE); } else { /* * Print the values of any variables requested by * the user. */ LstNode *ln; const char *name; char *v; char *value; for (ln = Lst_First(&variables); ln != NULL; ln = Lst_Succ(ln)) { name = Lst_Datum(ln); if (expandVars) { v = emalloc(strlen(name) + 1 + 3); sprintf(v, "${%s}", name); value = Var_Subst(NULL, v, VAR_GLOBAL, FALSE); } else { value = Var_Value(name, VAR_GLOBAL, &v); } printf("%s\n", value != NULL ? value : ""); if (v != NULL) free(v); } } Lst_Destroy(&variables, free); Lst_Destroy(&makefiles, free); Lst_Destroy(&create, free); /* print the graph now it's been processed if the user requested it */ if (DEBUG(GRAPH2)) Targ_PrintGraph(2); if (queryFlag && outOfDate) return (1); else return (0); } /*- * ReadMakefile -- * Open and parse the given makefile. * * Results: * TRUE if ok. FALSE if couldn't open file. * * Side Effects: * lots */ static Boolean ReadMakefile(const void *p, const void *q __unused) { char *fname; /* makefile to read */ FILE *stream; char *name, path[MAXPATHLEN]; char *MAKEFILE; int setMAKEFILE; /* XXX - remove this once constification is done */ fname = estrdup(p); if (!strcmp(fname, "-")) { Parse_File("(stdin)", stdin); Var_Set("MAKEFILE", "", VAR_GLOBAL); } else { setMAKEFILE = strcmp(fname, ".depend"); /* if we've chdir'd, rebuild the path name */ if (curdir != objdir && *fname != '/') { snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); /* * XXX The realpath stuff breaks relative includes * XXX in some cases. The problem likely is in * XXX parse.c where it does special things in * XXX ParseDoInclude if the file is relateive * XXX or absolute and not a system file. There * XXX it assumes that if the current file that's * XXX being included is absolute, that any files * XXX that it includes shouldn't do the -I path * XXX stuff, which is inconsistant with historical * XXX behavior. However, I can't pentrate the mists * XXX further, so I'm putting this workaround in * XXX here until such time as the underlying bug * XXX can be fixed. */ #if THIS_BREAKS_THINGS if (realpath(path, path) != NULL && (stream = fopen(path, "r")) != NULL) { MAKEFILE = fname; fname = path; goto found; } } else if (realpath(fname, path) != NULL) { MAKEFILE = fname; fname = path; if ((stream = fopen(fname, "r")) != NULL) goto found; } #else if ((stream = fopen(path, "r")) != NULL) { MAKEFILE = fname; fname = path; goto found; } } else { MAKEFILE = fname; if ((stream = fopen(fname, "r")) != NULL) goto found; } #endif /* look in -I and system include directories. */ name = Dir_FindFile(fname, &parseIncPath); if (!name) name = Dir_FindFile(fname, &sysIncPath); if (!name || !(stream = fopen(name, "r"))) return (FALSE); MAKEFILE = fname = name; /* * set the MAKEFILE variable desired by System V fans -- the * placement of the setting here means it gets set to the last * makefile specified, as it is set by SysV make. */ found: if (setMAKEFILE) Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); Parse_File(fname, stream); fclose(stream); } return (TRUE); } /*- * Cmd_Exec -- * Execute the command in cmd, and return the output of that command * in a string. * * Results: * A string containing the output of the command, or the empty string * If error is not NULL, it contains the reason for the command failure * * Side Effects: * The string must be freed by the caller. */ Buffer * Cmd_Exec(char *cmd, const char **error) { int fds[2]; /* Pipe streams */ int cpid; /* Child PID */ int pid; /* PID from wait() */ int status; /* command exit status */ Buffer *buf; /* buffer to store the result */ ssize_t rcnt; *error = NULL; buf = Buf_Init(0); if (shellPath == NULL) Shell_Init(); /* * Open a pipe for fetching its output */ if (pipe(fds) == -1) { *error = "Couldn't create pipe for \"%s\""; return (buf); } /* * Fork */ switch (cpid = vfork()) { case 0: /* * Close input side of pipe */ close(fds[0]); /* * Duplicate the output stream to the shell's output, then * shut the extra thing down. Note we don't fetch the error * stream...why not? Why? */ dup2(fds[1], 1); close(fds[1]); { char *args[4]; /* Set up arguments for shell */ args[0] = shellName; args[1] = "-c"; args[2] = cmd; args[3] = NULL; execv(shellPath, args); _exit(1); /*NOTREACHED*/ } case -1: *error = "Couldn't exec \"%s\""; return (buf); default: /* * No need for the writing half */ close(fds[1]); do { char result[BUFSIZ]; rcnt = read(fds[0], result, sizeof(result)); if (rcnt != -1) Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result); } while (rcnt > 0 || (rcnt == -1 && errno == EINTR)); if (rcnt == -1) *error = "Error reading shell's output for \"%s\""; /* * Close the input side of the pipe. */ close(fds[0]); /* * Wait for the process to exit. */ while (((pid = wait(&status)) != cpid) && (pid >= 0)) continue; if (status) *error = "\"%s\" returned non-zero status"; Buf_StripNewlines(buf); break; } return (buf); } /* * usage -- * exit with usage message */ static void usage(void) { fprintf(stderr, "%s\n%s\n%s\n", "usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", " [-E variable] [-f makefile] [-I directory] [-j max_jobs]", " [-m directory] [-V variable] [variable=value] [target ...]"); exit(2); }