/* * 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. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1988, 1989, 1990, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 3/19/94"; #endif static const char rcsid[] = "$Id: main.c,v 1.24 1998/06/13 11:55:57 peter Exp $"; #endif /* not lint */ /*- * 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. * * Error Print a tagged error message. The global * MAKE variable must have been defined. This * takes a format string and two optional * arguments for it. * * Fatal Print an error message and exit. Also takes * a format string and two arguments. * * Punt Aborts all jobs and exits with a message. Also * takes a format string and two arguments. * * Finish Finish things up by printing the number of * errors which occured, as passed to it, and * exiting. */ #include #include #include #include #include #include #ifndef MACHINE #include #endif #include #include #include #include #include #include #if __STDC__ #include #else #include #endif #include "make.h" #include "hash.h" #include "dir.h" #include "job.h" #include "pathnames.h" #ifndef DEFMAXLOCAL #define DEFMAXLOCAL DEFMAXJOBS #endif /* DEFMAXLOCAL */ #define MAKEFLAGS ".MAKEFLAGS" Lst create; /* Targets to be made */ time_t now; /* Time at start of make */ GNode *DEFAULT; /* .DEFAULT node */ Boolean allPrecious; /* .PRECIOUS given on line by itself */ static Boolean noBuiltins; /* -r flag */ static Lst makefiles; /* ordered list of makefiles to read */ static Boolean printVars; /* print value of one or more vars */ static Lst variables; /* list of variables to print */ int maxJobs; /* -j argument */ static Boolean forceJobs; /* -j argument given */ static int maxLocal; /* -L argument */ 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 oldVars; /* variable substitution style */ Boolean checkEnvFirst; /* -e flag */ static Boolean jobsRunning; /* TRUE if the jobs might be running */ static void MainParseArgs __P((int, char **)); char * chdir_verify_path __P((char *, char *)); static int ReadMakefile __P((ClientData, ClientData)); static void usage __P((void)); static char *curdir; /* startup directory */ static char *objdir; /* where we chdir'ed to */ /*- * 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(argc, argv) int argc; char **argv; { extern int optind; extern char *optarg; char *p; int c; optind = 1; /* since we're called more than once */ #ifdef REMOTE # define OPTFLAGS "BD:I:L:PSV:d:ef:ij:km:nqrst" #else # define OPTFLAGS "BD:I:PSV:d:ef:ij:km:nqrst" #endif rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { switch(c) { case 'D': Var_Set(optarg, "1", VAR_GLOBAL); Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'I': Parse_AddIncludeDir(optarg); Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'V': printVars = TRUE; p = malloc(strlen(optarg) + 1 + 3); if (!p) Punt("make: cannot allocate memory."); /* This sprintf is safe, because of the malloc above */ (void)sprintf(p, "${%s}", optarg); (void)Lst_AtEnd(variables, (ClientData)p); Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'B': compatMake = TRUE; Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); break; #ifdef REMOTE case 'L': maxLocal = atoi(optarg); Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; #endif case 'P': usePipes = FALSE; Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); break; case 'S': keepgoing = FALSE; Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 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 '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(); } Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; } case 'e': checkEnvFirst = TRUE; Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); break; case 'f': (void)Lst_AtEnd(makefiles, (ClientData)optarg); break; case 'i': ignoreErrors = TRUE; Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); break; case 'j': forceJobs = TRUE; maxJobs = atoi(optarg); #ifndef REMOTE maxLocal = maxJobs; #endif Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'k': keepgoing = TRUE; Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); break; case 'm': Dir_AddDir(sysIncPath, optarg); Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'n': noExecute = TRUE; Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); break; case 'q': queryFlag = TRUE; /* Kind of nonsensical, wot? */ Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); break; case 'r': noBuiltins = TRUE; Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); break; case 's': beSilent = TRUE; Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); break; case 't': touchFlag = TRUE; Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 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)) 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; } (void)Lst_AtEnd(create, (ClientData)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(line) char *line; /* Line to fracture */ { char **argv; /* Manufactured argument vector */ int argc; /* Number of arguments in argv */ if (line == NULL) return; for (; *line == ' '; ++line) continue; if (!*line) return; argv = brk_string(line, &argc, TRUE); MainParseArgs(argc, argv); } char * chdir_verify_path(path, obpath) char *path; char *obpath; { struct stat sb; if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { if (chdir(path)) { warn("warning: %s", path); return 0; } else { if (path[0] != '/') { (void) snprintf(obpath, MAXPATHLEN, "%s/%s", curdir, path); return obpath; } else return path; } } return 0; } /*- * 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(argc, argv) int argc; char **argv; { Lst targs; /* target nodes to create -- passed to Make_Init */ Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ struct stat sb, sa; char *p, *p1, *path, *pathp, *pwd; char mdpath[MAXPATHLEN + 1]; char obpath[MAXPATHLEN + 1]; char cdpath[MAXPATHLEN + 1]; char *machine = getenv("MACHINE"); Lst sysMkPath; /* Path of sys.mk */ char *cp = NULL, *start; /* avoid faults on read-only strings */ static char syspath[] = _PATH_DEFSYSPATH; #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; (void) setrlimit(RLIMIT_NOFILE, &rl); } } #endif /* * Find where we are and take care of PWD for the automounter... * 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); if (stat(curdir, &sa) == -1) err(2, "%s", curdir); if ((pwd = getenv("PWD")) != NULL) { if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino && sa.st_dev == sb.st_dev) (void) strcpy(curdir, pwd); } /* * 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) { perror("make: uname"); exit(2); } machine = utsname.machine; #else machine = MACHINE; #endif } /* * The object directory location is determined using the * following order of preference: * * 1. MAKEOBJDIRPREFIX`cwd` * 2. MAKEOBJDIR * 3. _PATH_OBJDIR.${MACHINE} * 4. _PATH_OBJDIR * 5. _PATH_OBJDIRPREFIX${MACHINE} * * If all fails, use the current directory to build. * * 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; (void) snprintf(mdpath, MAXPATHLEN, "%s.%s", path, machine); if (!(objdir = chdir_verify_path(mdpath, obpath))) if (!(objdir=chdir_verify_path(path, obpath))) { (void) 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 { (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); if (!(objdir = chdir_verify_path(mdpath, obpath))) objdir = curdir; } setenv("PWD", objdir, 1); create = Lst_Init(FALSE); makefiles = Lst_Init(FALSE); printVars = FALSE; variables = Lst_Init(FALSE); 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; maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */ #ifdef REMOTE maxJobs = DEFMAXJOBS; /* Set default max concurrency */ #else maxJobs = maxLocal; #endif 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(); if (objdir != curdir) Dir_AddDir(dirSearchPath, curdir); Var_Set(".CURDIR", curdir, VAR_GLOBAL); Var_Set(".OBJDIR", objdir, VAR_GLOBAL); /* * 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); #ifdef MACHINE_ARCH Var_Set("MACHINE_ARCH", MACHINE_ARCH, 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). */ #ifdef POSIX Main_ParseArgLine(getenv("MAKEFLAGS")); #else Main_ParseArgLine(getenv("MAKE")); #endif MainParseArgs(argc, argv); /* * 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 = NILGNODE; (void)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 != NILLNODE; ln = Lst_Succ(ln)) { char *name = (char *)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) { LstNode ln; sysMkPath = Lst_Init (FALSE); Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath); if (Lst_IsEmpty(sysMkPath)) Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); ln = Lst_Find(sysMkPath, (ClientData)NULL, ReadMakefile); if (ln != NILLNODE) Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); } if (!Lst_IsEmpty(makefiles)) { LstNode ln; ln = Lst_Find(makefiles, (ClientData)NULL, ReadMakefile); if (ln != NILLNODE) Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); } else if (!ReadMakefile("makefile", NULL)) (void)ReadMakefile("Makefile", NULL); (void)ReadMakefile(".depend", NULL); Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); if (p1) free(p1); /* Install all the flags into the MAKE envariable. */ if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) #ifdef POSIX setenv("MAKEFLAGS", p, 1); #else setenv("MAKE", p, 1); #endif if (p1) 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)) { char *vpath, *path, *cp, savec; /* * 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}"; vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); path = vpath; do { /* skip to end of directory */ for (cp = path; *cp != ':' && *cp != '\0'; cp++) continue; /* Save terminator character so know when to stop */ savec = *cp; *cp = '\0'; /* Add directory to search path */ Dir_AddDir(dirSearchPath, path); *cp = savec; path = cp + 1; } while (savec == ':'); (void)free((Address)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 (printVars) { LstNode ln; for (ln = Lst_First(variables); ln != NILLNODE; ln = Lst_Succ(ln)) { char *value = Var_Subst(NULL, (char *)Lst_Datum(ln), VAR_GLOBAL, FALSE); printf("%s\n", value ? value : ""); } } /* * Have now 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. */ if (Lst_IsEmpty(create)) targs = Parse_MainName(); else targs = Targ_FindList(create, TARG_CREATE); if (!compatMake && !printVars) { /* * 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) { if (maxLocal == -1) maxLocal = maxJobs; Job_Init(maxJobs, maxLocal); jobsRunning = TRUE; } /* Traverse the graph, checking on all the targets */ outOfDate = Make_Run(targs); } else if (!printVars) { /* * Compat_Init will take care of creating all the targets as * well as initializing the module. */ Compat_Run(targs); } Lst_Destroy(targs, NOFREE); Lst_Destroy(variables, NOFREE); Lst_Destroy(makefiles, NOFREE); Lst_Destroy(create, (void (*) __P((ClientData))) free); /* print the graph now it's been processed if the user requested it */ if (DEBUG(GRAPH2)) Targ_PrintGraph(2); Suff_End(); Targ_End(); Arch_End(); str_end(); Var_End(); Parse_End(); Dir_End(); 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(p, q) ClientData p, q; { char *fname = p; /* makefile to read */ extern Lst parseIncPath; FILE *stream; char *name, path[MAXPATHLEN + 1]; if (!strcmp(fname, "-")) { Parse_File("(stdin)", stdin); Var_Set("MAKEFILE", "", VAR_GLOBAL); } else { /* if we've chdir'd, rebuild the path name */ if (curdir != objdir && *fname != '/') { (void)sprintf(path, "%s/%s", curdir, fname); if ((stream = fopen(path, "r")) != NULL) { fname = path; goto found; } } else if ((stream = fopen(fname, "r")) != NULL) goto found; /* 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); 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: Var_Set("MAKEFILE", fname, VAR_GLOBAL); Parse_File(fname, stream); (void)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 err is not NULL, it contains the reason for the command failure * * Side Effects: * The string must be freed by the caller. */ char * Cmd_Exec(cmd, err) char *cmd; char **err; { char *args[4]; /* Args for invoking the shell */ int fds[2]; /* Pipe streams */ int cpid; /* Child PID */ int pid; /* PID from wait() */ char *res; /* result */ int status; /* command exit status */ Buffer buf; /* buffer to store the result */ char *cp; int cc; *err = NULL; /* * Set up arguments for shell */ args[0] = "sh"; args[1] = "-c"; args[2] = cmd; args[3] = NULL; /* * Open a pipe for fetching its output */ if (pipe(fds) == -1) { *err = "Couldn't create pipe for \"%s\""; goto bad; } /* * Fork */ switch (cpid = vfork()) { case 0: /* * Close input side of pipe */ (void) 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? */ (void) dup2(fds[1], 1); (void) close(fds[1]); (void) execv("/bin/sh", args); _exit(1); /*NOTREACHED*/ case -1: *err = "Couldn't exec \"%s\""; goto bad; default: /* * No need for the writing half */ (void) close(fds[1]); buf = Buf_Init (MAKE_BSIZE); do { char result[BUFSIZ]; cc = read(fds[0], result, sizeof(result)); if (cc > 0) Buf_AddBytes(buf, cc, (Byte *) result); } while (cc > 0 || (cc == -1 && errno == EINTR)); /* * Close the input side of the pipe. */ (void) close(fds[0]); /* * Wait for the process to exit. */ while(((pid = wait(&status)) != cpid) && (pid >= 0)) continue; if (cc == -1) *err = "Error reading shell's output for \"%s\""; res = (char *)Buf_GetAll (buf, &cc); Buf_Destroy (buf, FALSE); if (status) *err = "\"%s\" returned non-zero status"; /* * Null-terminate the result, convert newlines to spaces and * install it in the variable. */ res[cc] = '\0'; cp = &res[cc] - 1; if (*cp == '\n') { /* * A final newline is just stripped */ *cp-- = '\0'; } while (cp >= res) { if (*cp == '\n') { *cp = ' '; } cp--; } break; } return res; bad: res = emalloc(1); *res = '\0'; return res; } /*- * Error -- * Print an error message given its format. * * Results: * None. * * Side Effects: * The message is printed. */ /* VARARGS */ void #if __STDC__ Error(char *fmt, ...) #else Error(va_alist) va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else char *fmt; va_start(ap); fmt = va_arg(ap, char *); #endif (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); } /*- * Fatal -- * Produce a Fatal error message. If jobs are running, waits for them * to finish. * * Results: * None * * Side Effects: * The program exits */ /* VARARGS */ void #if __STDC__ Fatal(char *fmt, ...) #else Fatal(va_alist) va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else char *fmt; va_start(ap); fmt = va_arg(ap, char *); #endif if (jobsRunning) Job_Wait(); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); if (DEBUG(GRAPH2)) Targ_PrintGraph(2); exit(2); /* Not 1 so -q can distinguish error */ } /* * Punt -- * Major exception once jobs are being created. Kills all jobs, prints * a message and exits. * * Results: * None * * Side Effects: * All children are killed indiscriminately and the program Lib_Exits */ /* VARARGS */ void #if __STDC__ Punt(char *fmt, ...) #else Punt(va_alist) va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else char *fmt; va_start(ap); fmt = va_arg(ap, char *); #endif (void)fprintf(stderr, "make: "); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); DieHorribly(); } /*- * DieHorribly -- * Exit without giving a message. * * Results: * None * * Side Effects: * A big one... */ void DieHorribly() { if (jobsRunning) Job_AbortAll(); if (DEBUG(GRAPH2)) Targ_PrintGraph(2); exit(2); /* Not 1, so -q can distinguish error */ } /* * Finish -- * Called when aborting due to errors in child shell to signal * abnormal exit. * * Results: * None * * Side Effects: * The program exits */ void Finish(errors) int errors; /* number of errors encountered in Make_Make */ { Fatal("%d error%s", errors, errors == 1 ? "" : "s"); } /* * emalloc -- * malloc, but die on error. */ void * emalloc(len) size_t len; { void *p; if ((p = malloc(len)) == NULL) enomem(); return(p); } /* * estrdup -- * strdup, but die on error. */ char * estrdup(str) const char *str; { char *p; if ((p = strdup(str)) == NULL) enomem(); return(p); } /* * erealloc -- * realloc, but die on error. */ void * erealloc(ptr, size) void *ptr; size_t size; { if ((ptr = realloc(ptr, size)) == NULL) enomem(); return(ptr); } /* * enomem -- * die when out of memory. */ void enomem() { err(2, NULL); } /* * enunlink -- * Remove a file carefully, avoiding directories. */ int eunlink(file) const char *file; { struct stat st; if (lstat(file, &st) == -1) return -1; if (S_ISDIR(st.st_mode)) { errno = EISDIR; return -1; } return unlink(file); } /* * usage -- * exit with usage message */ static void usage() { (void)fprintf(stderr, "%s\n%s\n%s\n", "usage: make [-Beiknqrst] [-D variable] [-d flags] [-f makefile ]", " [-I directory] [-j max_jobs] [-m directory] [-V variable]", " [variable=value] [target ...]"); exit(2); } int PrintAddr(a, b) ClientData a; ClientData b; { printf("%lx ", (unsigned long) a); return b ? 0 : 0; }