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763d9eb177
freebsd-dev/usr.bin/make/main.c
Juli Mallett 763d9eb177 Make make(1) WARNS=6 clean except for const issues. This mostly involves 
renaming variables to not shadow libc functions or greater scope locals.  Kinda
makes one wonder if the extern ones weren't meant in some of these places :)

The only thing I'd still like to do WRT this is possibly combine rstat and
status in compat.c -- that should be fine, as I do not think the codepaths
will want both around at once.

Sponsored by:	Bright Path Solutions
2002-09-28 23:35:07 +00:00

1368 lines
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/*
* 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 <sys/cdefs.h>
__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.
*
* 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 <sys/types.h>
#include <sys/time.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sys/signal.h>
#include <sys/stat.h>
#if defined(__i386__)
#include <sys/sysctl.h>
#endif
#ifndef MACHINE
#include <sys/utsname.h>
#endif
#include <sys/wait.h>
#include <err.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sysexits.h>
#include <stdarg.h>
#include <unistd.h>
#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 expandVars; /* fully expand printed variables */
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 beVerbose; /* -v flag */
Boolean oldVars; /* variable substitution style */
Boolean checkEnvFirst; /* -e flag */
Lst envFirstVars; /* (-E) vars to override from env */
static Boolean jobsRunning; /* TRUE if the jobs might be running */
static void MainParseArgs(int, char **);
char * chdir_verify_path(char *, char *);
static int ReadMakefile(void *, void *);
static void usage(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;
{
char *p;
int c;
optind = 1; /* since we're called more than once */
#ifdef REMOTE
# define OPTFLAGS "BC:D:E:I:L:PSV:Xd:ef:ij:km:nqrstv"
#else
# define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv"
#endif
rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) {
switch(c) {
case 'C':
chdir(optarg);
break;
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':
(void)Lst_AtEnd(variables, (void *)optarg);
Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
case 'X':
expandVars = FALSE;
break;
case 'B':
compatMake = TRUE;
Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
break;
#ifdef REMOTE
case 'L': {
char *endptr;
maxLocal = strtol(optarg, &endptr, 10);
if (maxLocal < 0 || *endptr != '\0') {
warnx("illegal number, -L argument -- %s",
optarg);
usage();
}
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 '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();
}
Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL);
break;
}
case 'E':
p = emalloc(strlen(optarg) + 1);
(void)strcpy(p, optarg);
(void)Lst_AtEnd(envFirstVars, (void *)p);
Var_Append(MAKEFLAGS, "-E", 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, (void *)optarg);
break;
case 'i':
ignoreErrors = TRUE;
Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
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();
}
#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;
case 'v':
beVerbose = TRUE;
Var_Append(MAKEFLAGS, "-v", 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, (void *)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) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) {
warn("warning: %s", path);
return 0;
}
return obpath;
}
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 sa;
char *p, *p1, *path, *pathp;
char mdpath[MAXPATHLEN];
char obpath[MAXPATHLEN];
char cdpath[MAXPATHLEN];
char *machine = getenv("MACHINE");
char *machine_arch = getenv("MACHINE_ARCH");
char *machine_cpu = getenv("MACHINE_CPU");
Lst sysMkPath; /* Path of sys.mk */
char *cp = NULL, *start;
/* avoid faults on read-only strings */
static char syspath[] = _PATH_DEFSYSPATH;
#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;
(void) setrlimit(RLIMIT_NOFILE, &rl);
}
}
#endif
/*
* 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);
if (stat(curdir, &sa) == -1)
err(2, "%s", curdir);
#if defined(__i386__) && defined(__FreeBSD_version) && \
__FreeBSD_version > 300003
/*
* 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";
}
}
#endif
/*
* 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";
}
/*
* 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;
(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;
}
create = Lst_Init(FALSE);
makefiles = Lst_Init(FALSE);
envFirstVars = Lst_Init(FALSE);
expandVars = TRUE;
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);
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).
*/
#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 = NULL;
(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 != NULL;
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, (void *)NULL, ReadMakefile);
if (ln != NULL)
Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
}
if (!Lst_IsEmpty(makefiles)) {
LstNode ln;
ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile);
if (ln != NULL)
Fatal("make: cannot open %s.", (char *)Lst_Datum(ln));
} else if (!ReadMakefile("BSDmakefile", NULL))
if (!ReadMakefile("makefile", NULL))
(void)ReadMakefile("Makefile", NULL);
(void)ReadMakefile(".depend", NULL);
Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
efree(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
efree(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.
* <directory>:<directory>:<directory>...
*/
if (Var_Exists("VPATH", VAR_CMD)) {
char *vpath, *path1, *cp1, 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);
path1 = vpath;
do {
/* skip to end of directory */
for (cp1 = path1; *cp != ':' && *cp != '\0'; cp++)
continue;
/* Save terminator character so know when to stop */
savec = *cp1;
*cp1 = '\0';
/* Add directory to search path */
Dir_AddDir(dirSearchPath, path1);
*cp1 = savec;
path1 = cp1 + 1;
} while (savec == ':');
(void)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)) {
LstNode ln;
for (ln = Lst_First(variables); ln != NULL;
ln = Lst_Succ(ln)) {
char *value;
if (expandVars) {
p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3);
/* This sprintf is safe, because of the malloc above */
(void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln));
value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE);
} else {
value = Var_Value((char *)Lst_Datum(ln),
VAR_GLOBAL, &p1);
}
printf("%s\n", value ? value : "");
if (p1)
free(p1);
}
} else {
/*
* 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) {
/*
* 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 {
/*
* 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 (*)(void *)) 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)
void *p;
void *q __unused;
{
char *fname = p; /* makefile to read */
extern Lst parseIncPath;
FILE *stream;
char *name, path[MAXPATHLEN];
char *MAKEFILE;
int setMAKEFILE;
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 != '/') {
(void)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);
(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 error 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, error)
char *cmd;
char **error;
{
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;
*error = 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) {
*error = "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]);
#if DEFSHELL == 1
(void) execv("/bin/sh", args);
#elif DEFSHELL == 2
(void) execv("/bin/ksh", args);
#else
#error "DEFSHELL must be 1 or 2."
#endif
_exit(1);
/*NOTREACHED*/
case -1:
*error = "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)
*error = "Error reading shell's output for \"%s\"";
res = (char *)Buf_GetAll (buf, &cc);
Buf_Destroy (buf, FALSE);
if (status)
*error = "\"%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;
}
/*-
* Debug --
* Print a debugging message given its format.
*
* Results:
* None.
*
* Side Effects:
* The message is printed.
*/
/* VARARGS */
void
Debug(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fflush(stderr);
}
/*-
* Error --
* Print an error message given its format.
*
* Results:
* None.
*
* Side Effects:
* The message is printed.
*/
/* VARARGS */
void
Error(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(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
Fatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
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
Punt(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(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 [-Beiknqrstv] [-D variable] [-d flags] [-E variable] [-f makefile]",
" [-I directory] [-j max_jobs] [-m directory] [-V variable]",
" [variable=value] [target ...]");
exit(2);
}
int
PrintAddr(a, b)
void * a;
void * b __unused;
{
printf("%p ", a);
return 0;
}
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