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freebsd-skq/contrib/bmake/main.c
Simon J. Gerraty 3841c28717 Update to bmake-20200710 
Key changes include reduced noise at end of failed build log
and avoid evaluation of unnecessary terms in conditionals.
In META MODE; a target flagged .META is out-of-date if meta file
is missing

MFC after:      1 week
2020-07-12 01:11:48 +00:00

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/* $NetBSD: main.c,v 1.279 2020/07/03 08:13:23 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. 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. 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.
*/
/*
* 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 MAKE_NATIVE
static char rcsid[] = "$NetBSD: main.c,v 1.279 2020/07/03 08:13:23 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 3/19/94";
#else
__RCSID("$NetBSD: main.c,v 1.279 2020/07/03 08:13:23 rillig Exp $");
#endif
#endif /* not lint */
#endif
/*-
* 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 optional arguments
* for it.
*
* Fatal Print an error message and exit. Also takes
* a format string and arguments for it.
*
* Punt Aborts all jobs and exits with a message. Also
* takes a format string and arguments for it.
*
* Finish Finish things up by printing the number of
* errors which occurred, as passed to it, and
* exiting.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sys/stat.h>
#if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL)
#include <sys/sysctl.h>
#endif
#include <sys/utsname.h>
#include "wait.h"
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
#include "make.h"
#include "hash.h"
#include "dir.h"
#include "job.h"
#include "pathnames.h"
#include "trace.h"
#ifdef USE_IOVEC
#include <sys/uio.h>
#endif
#ifndef DEFMAXLOCAL
#define DEFMAXLOCAL DEFMAXJOBS
#endif /* DEFMAXLOCAL */
#ifndef __arraycount
# define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
#endif
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 */
Boolean deleteOnError; /* .DELETE_ON_ERROR: set */
static Boolean noBuiltins; /* -r flag */
static Lst makefiles; /* ordered list of makefiles to read */
static int printVars; /* -[vV] argument */
#define COMPAT_VARS 1
#define EXPAND_VARS 2
static Lst variables; /* list of variables to print */
int maxJobs; /* -j argument */
static int maxJobTokens; /* -j argument */
Boolean compatMake; /* -B argument */
int debug; /* -d argument */
Boolean debugVflag; /* -dV */
Boolean noExecute; /* -n flag */
Boolean noRecursiveExecute; /* -N flag */
Boolean keepgoing; /* -k flag */
Boolean queryFlag; /* -q flag */
Boolean touchFlag; /* -t flag */
Boolean enterFlag; /* -w flag */
Boolean enterFlagObj; /* -w and objdir != srcdir */
Boolean ignoreErrors; /* -i flag */
Boolean beSilent; /* -s flag */
Boolean oldVars; /* variable substitution style */
Boolean checkEnvFirst; /* -e flag */
Boolean parseWarnFatal; /* -W flag */
Boolean jobServer; /* -J flag */
static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */
Boolean varNoExportEnv; /* -X flag */
Boolean doing_depend; /* Set while reading .depend */
static Boolean jobsRunning; /* TRUE if the jobs might be running */
static const char * tracefile;
static void MainParseArgs(int, char **);
static int ReadMakefile(const void *, const void *);
static void usage(void) MAKE_ATTR_DEAD;
static void purge_cached_realpaths(void);
static Boolean ignorePWD; /* if we use -C, PWD is meaningless */
static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */
char curdir[MAXPATHLEN + 1]; /* Startup directory */
char *progname; /* the program name */
char *makeDependfile;
pid_t myPid;
int makelevel;
FILE *debug_file;
Boolean forceJobs = FALSE;
/*
* On some systems MACHINE is defined as something other than
* what we want.
*/
#ifdef FORCE_MACHINE
# undef MACHINE
# define MACHINE FORCE_MACHINE
#endif
extern Lst parseIncPath;
/*
* For compatibility with the POSIX version of MAKEFLAGS that includes
* all the options with out -, convert flags to -f -l -a -g -s.
*/
static char *
explode(const char *flags)
{
size_t len;
char *nf, *st;
const char *f;
if (flags == NULL)
return NULL;
for (f = flags; *f; f++)
if (!isalpha((unsigned char)*f))
break;
if (*f)
return bmake_strdup(flags);
len = strlen(flags);
st = nf = bmake_malloc(len * 3 + 1);
while (*flags) {
*nf++ = '-';
*nf++ = *flags++;
*nf++ = ' ';
}
*nf = '\0';
return st;
}
static void
parse_debug_options(const char *argvalue)
{
const char *modules;
const char *mode;
char *fname;
int len;
for (modules = argvalue; *modules; ++modules) {
switch (*modules) {
case 'A':
debug = ~0;
break;
case 'a':
debug |= DEBUG_ARCH;
break;
case 'C':
debug |= DEBUG_CWD;
break;
case 'c':
debug |= DEBUG_COND;
break;
case 'd':
debug |= DEBUG_DIR;
break;
case 'e':
debug |= DEBUG_ERROR;
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;
}
else if (modules[1] == '3') {
debug |= DEBUG_GRAPH3;
++modules;
}
break;
case 'j':
debug |= DEBUG_JOB;
break;
case 'l':
debug |= DEBUG_LOUD;
break;
case 'M':
debug |= DEBUG_META;
break;
case 'm':
debug |= DEBUG_MAKE;
break;
case 'n':
debug |= DEBUG_SCRIPT;
break;
case 'p':
debug |= DEBUG_PARSE;
break;
case 's':
debug |= DEBUG_SUFF;
break;
case 't':
debug |= DEBUG_TARG;
break;
case 'V':
debugVflag = TRUE;
break;
case 'v':
debug |= DEBUG_VAR;
break;
case 'x':
debug |= DEBUG_SHELL;
break;
case 'F':
if (debug_file != stdout && debug_file != stderr)
fclose(debug_file);
if (*++modules == '+') {
modules++;
mode = "a";
} else
mode = "w";
if (strcmp(modules, "stdout") == 0) {
debug_file = stdout;
goto debug_setbuf;
}
if (strcmp(modules, "stderr") == 0) {
debug_file = stderr;
goto debug_setbuf;
}
len = strlen(modules);
fname = bmake_malloc(len + 20);
memcpy(fname, modules, len + 1);
/* Let the filename be modified by the pid */
if (strcmp(fname + len - 3, ".%d") == 0)
snprintf(fname + len - 2, 20, "%d", getpid());
debug_file = fopen(fname, mode);
if (!debug_file) {
fprintf(stderr, "Cannot open debug file %s\n",
fname);
usage();
}
free(fname);
goto debug_setbuf;
default:
(void)fprintf(stderr,
"%s: illegal argument to d option -- %c\n",
progname, *modules);
usage();
}
}
debug_setbuf:
/*
* Make the debug_file unbuffered, and make
* stdout line buffered (unless debugfile == stdout).
*/
setvbuf(debug_file, NULL, _IONBF, 0);
if (debug_file != stdout) {
setvbuf(stdout, NULL, _IOLBF, 0);
}
}
/*
* does path contain any relative components
*/
static int
is_relpath(const char *path)
{
const char *cp;
if (path[0] != '/')
return TRUE;
cp = path;
do {
cp = strstr(cp, "/.");
if (!cp)
break;
cp += 2;
if (cp[0] == '/' || cp[0] == '\0')
return TRUE;
else if (cp[0] == '.') {
if (cp[1] == '/' || cp[1] == '\0')
return TRUE;
}
} while (cp);
return FALSE;
}
/*-
* 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)
{
char *p;
int c = '?';
int arginc;
char *argvalue;
const char *getopt_def;
struct stat sa, sb;
char *optscan;
Boolean inOption, dashDash = FALSE;
char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */
#define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"
/* Can't actually use getopt(3) because rescanning is not portable */
getopt_def = OPTFLAGS;
rearg:
inOption = FALSE;
optscan = NULL;
while(argc > 1) {
char *getopt_spec;
if(!inOption)
optscan = argv[1];
c = *optscan++;
arginc = 0;
if(inOption) {
if(c == '\0') {
++argv;
--argc;
inOption = FALSE;
continue;
}
} else {
if (c != '-' || dashDash)
break;
inOption = TRUE;
c = *optscan++;
}
/* '-' found at some earlier point */
getopt_spec = strchr(getopt_def, c);
if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') {
/* -<something> found, and <something> should have an arg */
inOption = FALSE;
arginc = 1;
argvalue = optscan;
if(*argvalue == '\0') {
if (argc < 3)
goto noarg;
argvalue = argv[2];
arginc = 2;
}
} else {
argvalue = NULL;
}
switch(c) {
case '\0':
arginc = 1;
inOption = FALSE;
break;
case 'B':
compatMake = TRUE;
Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL);
Var_Set(MAKE_MODE, "compat", VAR_GLOBAL);
break;
case 'C':
if (chdir(argvalue) == -1) {
(void)fprintf(stderr,
"%s: chdir %s: %s\n",
progname, argvalue,
strerror(errno));
exit(1);
}
if (getcwd(curdir, MAXPATHLEN) == NULL) {
(void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno));
exit(2);
}
if (!is_relpath(argvalue) &&
stat(argvalue, &sa) != -1 &&
stat(curdir, &sb) != -1 &&
sa.st_ino == sb.st_ino &&
sa.st_dev == sb.st_dev)
strncpy(curdir, argvalue, MAXPATHLEN);
ignorePWD = TRUE;
break;
case 'D':
if (argvalue == NULL || argvalue[0] == 0) goto noarg;
Var_Set(argvalue, "1", VAR_GLOBAL);
Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
break;
case 'I':
if (argvalue == NULL) goto noarg;
Parse_AddIncludeDir(argvalue);
Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
break;
case 'J':
if (argvalue == NULL) goto noarg;
if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) {
(void)fprintf(stderr,
"%s: internal error -- J option malformed (%s)\n",
progname, argvalue);
usage();
}
if ((fcntl(jp_0, F_GETFD, 0) < 0) ||
(fcntl(jp_1, F_GETFD, 0) < 0)) {
#if 0
(void)fprintf(stderr,
"%s: ###### warning -- J descriptors were closed!\n",
progname);
exit(2);
#endif
jp_0 = -1;
jp_1 = -1;
compatMake = TRUE;
} else {
Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
jobServer = TRUE;
}
break;
case 'N':
noExecute = TRUE;
noRecursiveExecute = TRUE;
Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL);
break;
case 'S':
keepgoing = FALSE;
Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL);
break;
case 'T':
if (argvalue == NULL) goto noarg;
tracefile = bmake_strdup(argvalue);
Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
break;
case 'V':
case 'v':
if (argvalue == NULL) goto noarg;
printVars = c == 'v' ? EXPAND_VARS : COMPAT_VARS;
(void)Lst_AtEnd(variables, argvalue);
Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
break;
case 'W':
parseWarnFatal = TRUE;
break;
case 'X':
varNoExportEnv = TRUE;
Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL);
break;
case 'd':
if (argvalue == NULL) goto noarg;
/* If '-d-opts' don't pass to children */
if (argvalue[0] == '-')
argvalue++;
else {
Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
}
parse_debug_options(argvalue);
break;
case 'e':
checkEnvFirst = TRUE;
Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL);
break;
case 'f':
if (argvalue == NULL) goto noarg;
(void)Lst_AtEnd(makefiles, argvalue);
break;
case 'i':
ignoreErrors = TRUE;
Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL);
break;
case 'j':
if (argvalue == NULL) goto noarg;
forceJobs = TRUE;
maxJobs = strtol(argvalue, &p, 0);
if (*p != '\0' || maxJobs < 1) {
(void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n",
progname);
exit(1);
}
Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL);
Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL);
maxJobTokens = maxJobs;
break;
case 'k':
keepgoing = TRUE;
Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL);
break;
case 'm':
if (argvalue == NULL) goto noarg;
/* look for magic parent directory search string */
if (strncmp(".../", argvalue, 4) == 0) {
if (!Dir_FindHereOrAbove(curdir, argvalue+4,
found_path, sizeof(found_path)))
break; /* nothing doing */
(void)Dir_AddDir(sysIncPath, found_path);
} else {
(void)Dir_AddDir(sysIncPath, argvalue);
}
Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL);
Var_Append(MAKEFLAGS, argvalue, 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 'w':
enterFlag = TRUE;
Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL);
break;
case '-':
dashDash = TRUE;
break;
default:
case '?':
#ifndef MAKE_NATIVE
fprintf(stderr, "getopt(%s) -> %d (%c)\n",
OPTFLAGS, c, c);
#endif
usage();
}
argv += arginc;
argc -= arginc;
}
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 (; argc > 1; ++argv, --argc)
if (Parse_IsVar(argv[1])) {
Parse_DoVar(argv[1], VAR_CMD);
} else {
if (!*argv[1])
Punt("illegal (null) argument.");
if (*argv[1] == '-' && !dashDash)
goto rearg;
(void)Lst_AtEnd(create, bmake_strdup(argv[1]));
}
return;
noarg:
(void)fprintf(stderr, "%s: option requires an argument -- %c\n",
progname, c);
usage();
}
/*-
* 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.
*
* Input:
* line Line to fracture
*
* Results:
* None
*
* Side Effects:
* Only those that come from the various arguments.
*/
void
Main_ParseArgLine(const char *line)
{
char **argv; /* Manufactured argument vector */
int argc; /* Number of arguments in argv */
char *args; /* Space used by the args */
char *buf, *p1;
char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1);
size_t len;
if (line == NULL)
return;
for (; *line == ' '; ++line)
continue;
if (!*line)
return;
#ifndef POSIX
{
/*
* $MAKE may simply be naming the make(1) binary
*/
char *cp;
if (!(cp = strrchr(line, '/')))
cp = line;
if ((cp = strstr(cp, "make")) &&
strcmp(cp, "make") == 0)
return;
}
#endif
buf = bmake_malloc(len = strlen(line) + strlen(argv0) + 2);
(void)snprintf(buf, len, "%s %s", argv0, line);
free(p1);
argv = brk_string(buf, &argc, TRUE, &args);
if (argv == NULL) {
Error("Unterminated quoted string [%s]", buf);
free(buf);
return;
}
free(buf);
MainParseArgs(argc, argv);
free(args);
free(argv);
}
Boolean
Main_SetObjdir(const char *fmt, ...)
{
struct stat sb;
char *path;
char buf[MAXPATHLEN + 1];
char buf2[MAXPATHLEN + 1];
Boolean rc = FALSE;
va_list ap;
va_start(ap, fmt);
vsnprintf(path = buf, MAXPATHLEN, fmt, ap);
va_end(ap);
if (path[0] != '/') {
snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path);
path = buf2;
}
/* look for the directory and try to chdir there */
if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
if (chdir(path)) {
(void)fprintf(stderr, "make warning: %s: %s.\n",
path, strerror(errno));
} else {
strncpy(objdir, path, MAXPATHLEN);
Var_Set(".OBJDIR", objdir, VAR_GLOBAL);
setenv("PWD", objdir, 1);
Dir_InitDot();
purge_cached_realpaths();
rc = TRUE;
if (enterFlag && strcmp(objdir, curdir) != 0)
enterFlagObj = TRUE;
}
}
return rc;
}
static Boolean
Main_SetVarObjdir(const char *var, const char *suffix)
{
char *p, *path, *xpath;
if ((path = Var_Value(var, VAR_CMD, &p)) == NULL ||
*path == '\0')
return FALSE;
/* expand variable substitutions */
if (strchr(path, '$') != 0)
xpath = Var_Subst(NULL, path, VAR_GLOBAL, VARF_WANTRES);
else
xpath = path;
(void)Main_SetObjdir("%s%s", xpath, suffix);
if (xpath != path)
free(xpath);
free(p);
return TRUE;
}
/*-
* ReadAllMakefiles --
* wrapper around ReadMakefile() to read all.
*
* Results:
* TRUE if ok, FALSE on error
*/
static int
ReadAllMakefiles(const void *p, const void *q)
{
return ReadMakefile(p, q) == 0;
}
int
str2Lst_Append(Lst lp, char *str, const char *sep)
{
char *cp;
int n;
if (!sep)
sep = " \t";
for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) {
(void)Lst_AtEnd(lp, cp);
n++;
}
return n;
}
#ifdef SIGINFO
/*ARGSUSED*/
static void
siginfo(int signo MAKE_ATTR_UNUSED)
{
char dir[MAXPATHLEN];
char str[2 * MAXPATHLEN];
int len;
if (getcwd(dir, sizeof(dir)) == NULL)
return;
len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir);
if (len > 0)
(void)write(STDERR_FILENO, str, (size_t)len);
}
#endif
/*
* Allow makefiles some control over the mode we run in.
*/
void
MakeMode(const char *mode)
{
char *mp = NULL;
if (!mode)
mode = mp = Var_Subst(NULL, "${" MAKE_MODE ":tl}",
VAR_GLOBAL, VARF_WANTRES);
if (mode && *mode) {
if (strstr(mode, "compat")) {
compatMake = TRUE;
forceJobs = FALSE;
}
#if USE_META
if (strstr(mode, "meta"))
meta_mode_init(mode);
#endif
}
free(mp);
}
static void
doPrintVars(void)
{
LstNode ln;
Boolean expandVars;
if (printVars == EXPAND_VARS)
expandVars = TRUE;
else if (debugVflag)
expandVars = FALSE;
else
expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE);
for (ln = Lst_First(variables); ln != NULL;
ln = Lst_Succ(ln)) {
char *var = (char *)Lst_Datum(ln);
char *value;
char *p1;
if (strchr(var, '$')) {
value = p1 = Var_Subst(NULL, var, VAR_GLOBAL,
VARF_WANTRES);
} else if (expandVars) {
char tmp[128];
int len = snprintf(tmp, sizeof(tmp), "${%s}", var);
if (len >= (int)sizeof(tmp))
Fatal("%s: variable name too big: %s",
progname, var);
value = p1 = Var_Subst(NULL, tmp, VAR_GLOBAL,
VARF_WANTRES);
} else {
value = Var_Value(var, VAR_GLOBAL, &p1);
}
printf("%s\n", value ? value : "");
free(p1);
}
}
static Boolean
runTargets(void)
{
Lst targs; /* target nodes to create -- passed to Make_Init */
Boolean outOfDate; /* FALSE if all targets up to date */
/*
* 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) {
Job_Init();
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);
outOfDate = FALSE;
}
Lst_Destroy(targs, NULL);
return outOfDate;
}
/*-
* 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; /* FALSE if all targets up to date */
struct stat sb, sa;
char *p1, *path;
char mdpath[MAXPATHLEN];
#ifdef FORCE_MACHINE
const char *machine = FORCE_MACHINE;
#else
const char *machine = getenv("MACHINE");
#endif
const char *machine_arch = getenv("MACHINE_ARCH");
char *syspath = getenv("MAKESYSPATH");
Lst sysMkPath; /* Path of sys.mk */
char *cp = NULL, *start;
/* avoid faults on read-only strings */
static char defsyspath[] = _PATH_DEFSYSPATH;
char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */
struct timeval rightnow; /* to initialize random seed */
struct utsname utsname;
/* default to writing debug to stderr */
debug_file = stderr;
#ifdef SIGINFO
(void)bmake_signal(SIGINFO, siginfo);
#endif
/*
* Set the seed to produce a different random sequence
* on each program execution.
*/
gettimeofday(&rightnow, NULL);
srandom(rightnow.tv_sec + rightnow.tv_usec);
if ((progname = strrchr(argv[0], '/')) != NULL)
progname++;
else
progname = argv[0];
#if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(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
if (uname(&utsname) == -1) {
(void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
strerror(errno));
exit(2);
}
/*
* 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 both MACHINE and MACHINE_ARCH are decided at
* run-time.
*/
if (!machine) {
#ifdef MAKE_NATIVE
machine = utsname.machine;
#else
#ifdef MAKE_MACHINE
machine = MAKE_MACHINE;
#else
machine = "unknown";
#endif
#endif
}
if (!machine_arch) {
#if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) && defined(CTL_HW) && defined(HW_MACHINE_ARCH)
static char machine_arch_buf[sizeof(utsname.machine)];
int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
size_t len = sizeof(machine_arch_buf);
if (sysctl(mib, __arraycount(mib), machine_arch_buf,
&len, NULL, 0) < 0) {
(void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname,
strerror(errno));
exit(2);
}
machine_arch = machine_arch_buf;
#else
#ifndef MACHINE_ARCH
#ifdef MAKE_MACHINE_ARCH
machine_arch = MAKE_MACHINE_ARCH;
#else
machine_arch = "unknown";
#endif
#else
machine_arch = MACHINE_ARCH;
#endif
#endif
}
myPid = getpid(); /* remember this for vFork() */
/*
* Just in case MAKEOBJDIR wants us to do something tricky.
*/
Var_Init(); /* Initialize the lists of variables for
* parsing arguments */
Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL);
Var_Set("MACHINE", machine, VAR_GLOBAL);
Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL);
#ifdef MAKE_VERSION
Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL);
#endif
Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */
/*
* This is the traditional preference for makefiles.
*/
#ifndef MAKEFILE_PREFERENCE_LIST
# define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
#endif
Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST,
VAR_GLOBAL);
Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL);
create = Lst_Init(FALSE);
makefiles = Lst_Init(FALSE);
printVars = 0;
debugVflag = FALSE;
variables = Lst_Init(FALSE);
beSilent = FALSE; /* Print commands as executed */
ignoreErrors = FALSE; /* Pay attention to non-zero returns */
noExecute = FALSE; /* Execute all commands */
noRecursiveExecute = FALSE; /* Execute all .MAKE targets */
keepgoing = FALSE; /* Stop on error */
allPrecious = FALSE; /* Remove targets when interrupted */
deleteOnError = FALSE; /* Historical default behavior */
queryFlag = FALSE; /* This is not just a check-run */
noBuiltins = FALSE; /* Read the built-in rules */
touchFlag = FALSE; /* Actually update targets */
debug = 0; /* No debug verbosity, please. */
jobsRunning = FALSE;
maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */
maxJobTokens = maxJobs;
compatMake = FALSE; /* No compat mode */
ignorePWD = FALSE;
/*
* Initialize the parsing, directory and variable modules to prepare
* for the reading of inclusion paths and variable settings on the
* command line
*/
/*
* 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.
*/
Parse_Init();
if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) {
/*
* Leave alone if it is an absolute path, or if it does
* not contain a '/' in which case we need to find it in
* the path, like execvp(3) and the shells do.
*/
p1 = argv[0];
} else {
/*
* A relative path, canonicalize it.
*/
p1 = cached_realpath(argv[0], mdpath);
if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) {
p1 = argv[0]; /* realpath failed */
}
}
Var_Set("MAKE", p1, VAR_GLOBAL);
Var_Set(".MAKE", p1, VAR_GLOBAL);
Var_Set(MAKEFLAGS, "", VAR_GLOBAL);
Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL);
Var_Set("MFLAGS", "", VAR_GLOBAL);
Var_Set(".ALLTARGETS", "", VAR_GLOBAL);
/* some makefiles need to know this */
Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD);
/*
* Set some other useful macros
*/
{
char tmp[64], *ep;
makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0;
if (makelevel < 0)
makelevel = 0;
snprintf(tmp, sizeof(tmp), "%d", makelevel);
Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL);
snprintf(tmp, sizeof(tmp), "%u", myPid);
Var_Set(".MAKE.PID", tmp, VAR_GLOBAL);
snprintf(tmp, sizeof(tmp), "%u", getppid());
Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL);
}
if (makelevel > 0) {
char pn[1024];
snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel);
progname = bmake_strdup(pn);
}
#ifdef USE_META
meta_init();
#endif
Dir_Init(NULL); /* Dir_* safe to call from MainParseArgs */
/*
* 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
p1 = explode(getenv("MAKEFLAGS"));
Main_ParseArgLine(p1);
free(p1);
#else
Main_ParseArgLine(getenv("MAKE"));
#endif
/*
* Find where we are (now).
* We take care of PWD for the automounter below...
*/
if (getcwd(curdir, MAXPATHLEN) == NULL) {
(void)fprintf(stderr, "%s: getcwd: %s.\n",
progname, strerror(errno));
exit(2);
}
MainParseArgs(argc, argv);
if (enterFlag)
printf("%s: Entering directory `%s'\n", progname, curdir);
/*
* Verify that cwd is sane.
*/
if (stat(curdir, &sa) == -1) {
(void)fprintf(stderr, "%s: %s: %s.\n",
progname, curdir, strerror(errno));
exit(2);
}
/*
* All this code is so that we know where we are when we start up
* on a different machine with pmake.
* Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
* since the value of curdir can vary depending on how we got
* here. Ie sitting at a shell prompt (shell that provides $PWD)
* or via subdir.mk in which case its likely a shell which does
* not provide it.
* So, to stop it breaking this case only, we ignore PWD if
* MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform.
*/
#ifndef NO_PWD_OVERRIDE
if (!ignorePWD) {
char *pwd, *ptmp1 = NULL, *ptmp2 = NULL;
if ((pwd = getenv("PWD")) != NULL &&
Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) {
const char *makeobjdir = Var_Value("MAKEOBJDIR",
VAR_CMD, &ptmp2);
if (makeobjdir == NULL || !strchr(makeobjdir, '$')) {
if (stat(pwd, &sb) == 0 &&
sa.st_ino == sb.st_ino &&
sa.st_dev == sb.st_dev)
(void)strncpy(curdir, pwd, MAXPATHLEN);
}
}
free(ptmp1);
free(ptmp2);
}
#endif
Var_Set(".CURDIR", curdir, VAR_GLOBAL);
/*
* Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that,
* MAKEOBJDIR is set in the environment, try only that value
* and fall back to .CURDIR if it does not exist.
*
* Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE,
* and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none
* of these paths exist, just use .CURDIR.
*/
Dir_Init(curdir);
(void)Main_SetObjdir("%s", curdir);
if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) &&
!Main_SetVarObjdir("MAKEOBJDIR", "") &&
!Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) &&
!Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) &&
!Main_SetObjdir("%s", _PATH_OBJDIR))
(void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir);
/*
* Initialize archive, target and suffix modules in preparation for
* parsing the makefile(s)
*/
Arch_Init();
Targ_Init();
Suff_Init();
Trace_Init(tracefile);
DEFAULT = NULL;
(void)time(&now);
Trace_Log(MAKESTART, NULL);
/*
* 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 (syspath == NULL || *syspath == '\0')
syspath = defsyspath;
else
syspath = bmake_strdup(syspath);
for (start = syspath; *start != '\0'; start = cp) {
for (cp = start; *cp != '\0' && *cp != ':'; cp++)
continue;
if (*cp == ':') {
*cp++ = '\0';
}
/* look for magic parent directory search string */
if (strncmp(".../", start, 4) != 0) {
(void)Dir_AddDir(defIncPath, start);
} else {
if (Dir_FindHereOrAbove(curdir, start+4,
found_path, sizeof(found_path))) {
(void)Dir_AddDir(defIncPath, found_path);
}
}
}
if (syspath != defsyspath)
free(syspath);
/*
* Read in the built-in rules first, followed by the specified
* makefile, if it was (makefile != 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,
Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath,
sysMkPath);
if (Lst_IsEmpty(sysMkPath))
Fatal("%s: no system rules (%s).", progname,
_PATH_DEFSYSMK);
ln = Lst_Find(sysMkPath, NULL, ReadMakefile);
if (ln == NULL)
Fatal("%s: cannot open %s.", progname,
(char *)Lst_Datum(ln));
}
if (!Lst_IsEmpty(makefiles)) {
LstNode ln;
ln = Lst_Find(makefiles, NULL, ReadAllMakefiles);
if (ln != NULL)
Fatal("%s: cannot open %s.", progname,
(char *)Lst_Datum(ln));
} else {
p1 = Var_Subst(NULL, "${" MAKEFILE_PREFERENCE "}",
VAR_CMD, VARF_WANTRES);
if (p1) {
(void)str2Lst_Append(makefiles, p1, NULL);
(void)Lst_Find(makefiles, NULL, ReadMakefile);
free(p1);
}
}
/* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
if (!noBuiltins || !printVars) {
makeDependfile = Var_Subst(NULL, "${.MAKE.DEPENDFILE:T}",
VAR_CMD, VARF_WANTRES);
doing_depend = TRUE;
(void)ReadMakefile(makeDependfile, NULL);
doing_depend = FALSE;
}
if (enterFlagObj)
printf("%s: Entering directory `%s'\n", progname, objdir);
MakeMode(NULL);
Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
free(p1);
if (!forceJobs && !compatMake &&
Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) {
char *value;
int n;
value = Var_Subst(NULL, "${.MAKE.JOBS}", VAR_GLOBAL, VARF_WANTRES);
n = strtol(value, NULL, 0);
if (n < 1) {
(void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n",
progname);
exit(1);
}
if (n != maxJobs) {
Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL);
Var_Append(MAKEFLAGS, value, VAR_GLOBAL);
}
maxJobs = n;
maxJobTokens = maxJobs;
forceJobs = TRUE;
free(value);
}
/*
* Be compatible if user did not specify -j and did not explicitly
* turned compatibility on
*/
if (!compatMake && !forceJobs) {
compatMake = TRUE;
}
if (!compatMake)
Job_ServerStart(maxJobTokens, jp_0, jp_1);
if (DEBUG(JOB))
fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
jp_0, jp_1, maxJobs, maxJobTokens, compatMake);
if (!printVars)
Main_ExportMAKEFLAGS(TRUE); /* initial export */
/*
* For compatibility, look at the directories in the VPATH variable
* and add them to the search path, if the variable is defined. The
* variable's value is in the same format as the PATH envariable, i.e.
* <directory>:<directory>:<directory>...
*/
if (Var_Exists("VPATH", VAR_CMD)) {
char *vpath, savec;
/*
* GCC stores string constants in read-only memory, but
* Var_Subst will want to write this thing, so store it
* in an array
*/
static char VPATH[] = "${VPATH}";
vpath = Var_Subst(NULL, VPATH, VAR_CMD, VARF_WANTRES);
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 */
(void)Dir_AddDir(dirSearchPath, path);
*cp = savec;
path = cp + 1;
} while (savec == ':');
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();
/*
* Propagate attributes through :: dependency lists.
*/
Targ_Propagate();
/* 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) {
doPrintVars();
outOfDate = FALSE;
} else {
outOfDate = runTargets();
}
#ifdef CLEANUP
Lst_Destroy(variables, NULL);
Lst_Destroy(makefiles, NULL);
Lst_Destroy(create, (FreeProc *)free);
#endif
/* print the graph now it's been processed if the user requested it */
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
Trace_Log(MAKEEND, 0);
if (enterFlagObj)
printf("%s: Leaving directory `%s'\n", progname, objdir);
if (enterFlag)
printf("%s: Leaving directory `%s'\n", progname, curdir);
#ifdef USE_META
meta_finish();
#endif
Suff_End();
Targ_End();
Arch_End();
Var_End();
Parse_End();
Dir_End();
Job_End();
Trace_End();
return outOfDate ? 1 : 0;
}
/*-
* ReadMakefile --
* Open and parse the given makefile.
*
* Results:
* 0 if ok. -1 if couldn't open file.
*
* Side Effects:
* lots
*/
static int
ReadMakefile(const void *p, const void *q MAKE_ATTR_UNUSED)
{
const char *fname = p; /* makefile to read */
int fd;
size_t len = MAXPATHLEN;
char *name, *path = bmake_malloc(len);
if (!strcmp(fname, "-")) {
Parse_File(NULL /*stdin*/, -1);
Var_Set("MAKEFILE", "", VAR_INTERNAL);
} else {
/* if we've chdir'd, rebuild the path name */
if (strcmp(curdir, objdir) && *fname != '/') {
size_t plen = strlen(curdir) + strlen(fname) + 2;
if (len < plen)
path = bmake_realloc(path, len = 2 * plen);
(void)snprintf(path, len, "%s/%s", curdir, fname);
fd = open(path, O_RDONLY);
if (fd != -1) {
fname = path;
goto found;
}
/* If curdir failed, try objdir (ala .depend) */
plen = strlen(objdir) + strlen(fname) + 2;
if (len < plen)
path = bmake_realloc(path, len = 2 * plen);
(void)snprintf(path, len, "%s/%s", objdir, fname);
fd = open(path, O_RDONLY);
if (fd != -1) {
fname = path;
goto found;
}
} else {
fd = open(fname, O_RDONLY);
if (fd != -1)
goto found;
}
/* look in -I and system include directories. */
name = Dir_FindFile(fname, parseIncPath);
if (!name)
name = Dir_FindFile(fname,
Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
if (!name || (fd = open(name, O_RDONLY)) == -1) {
free(name);
free(path);
return -1;
}
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 (!doing_depend)
Var_Set("MAKEFILE", fname, VAR_INTERNAL);
Parse_File(fname, fd);
}
free(path);
return 0;
}
/*-
* 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 errnum is not NULL, it contains the reason for the command failure
*
* Side Effects:
* The string must be freed by the caller.
*/
char *
Cmd_Exec(const char *cmd, const char **errnum)
{
const 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 */
WAIT_T status; /* command exit status */
Buffer buf; /* buffer to store the result */
char *cp;
int cc; /* bytes read, or -1 */
int savederr; /* saved errno */
*errnum = NULL;
if (!shellName)
Shell_Init();
/*
* Set up arguments for shell
*/
args[0] = shellName;
args[1] = "-c";
args[2] = cmd;
args[3] = NULL;
/*
* Open a pipe for fetching its output
*/
if (pipe(fds) == -1) {
*errnum = "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]);
Var_ExportVars();
(void)execv(shellPath, UNCONST(args));
_exit(1);
/*NOTREACHED*/
case -1:
*errnum = "Couldn't exec \"%s\"";
goto bad;
default:
/*
* No need for the writing half
*/
(void)close(fds[1]);
savederr = 0;
Buf_Init(&buf, 0);
do {
char result[BUFSIZ];
cc = read(fds[0], result, sizeof(result));
if (cc > 0)
Buf_AddBytes(&buf, cc, result);
}
while (cc > 0 || (cc == -1 && errno == EINTR));
if (cc == -1)
savederr = errno;
/*
* Close the input side of the pipe.
*/
(void)close(fds[0]);
/*
* Wait for the process to exit.
*/
while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) {
JobReapChild(pid, status, FALSE);
continue;
}
cc = Buf_Size(&buf);
res = Buf_Destroy(&buf, FALSE);
if (savederr != 0)
*errnum = "Couldn't read shell's output for \"%s\"";
if (WIFSIGNALED(status))
*errnum = "\"%s\" exited on a signal";
else if (WEXITSTATUS(status) != 0)
*errnum = "\"%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];
if (cc > 0 && *--cp == '\n') {
/*
* A final newline is just stripped
*/
*cp-- = '\0';
}
while (cp >= res) {
if (*cp == '\n') {
*cp = ' ';
}
cp--;
}
break;
}
return res;
bad:
res = bmake_malloc(1);
*res = '\0';
return res;
}
/*-
* 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;
FILE *err_file;
err_file = debug_file;
if (err_file == stdout)
err_file = stderr;
(void)fflush(stdout);
for (;;) {
va_start(ap, fmt);
fprintf(err_file, "%s: ", progname);
(void)vfprintf(err_file, fmt, ap);
va_end(ap);
(void)fprintf(err_file, "\n");
(void)fflush(err_file);
if (err_file == stderr)
break;
err_file = 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)fflush(stdout);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
(void)fflush(stderr);
PrintOnError(NULL, NULL);
if (DEBUG(GRAPH2) || DEBUG(GRAPH3))
Targ_PrintGraph(2);
Trace_Log(MAKEERROR, 0);
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)fflush(stdout);
(void)fprintf(stderr, "%s: ", progname);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
(void)fflush(stderr);
PrintOnError(NULL, NULL);
DieHorribly();
}
/*-
* DieHorribly --
* Exit without giving a message.
*
* Results:
* None
*
* Side Effects:
* A big one...
*/
void
DieHorribly(void)
{
if (jobsRunning)
Job_AbortAll();
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
Trace_Log(MAKEERROR, 0);
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(int errors)
/* number of errors encountered in Make_Make */
{
if (dieQuietly(NULL, -1))
exit(2);
Fatal("%d error%s", errors, errors == 1 ? "" : "s");
}
/*
* eunlink --
* Remove a file carefully, avoiding directories.
*/
int
eunlink(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);
}
/*
* execError --
* Print why exec failed, avoiding stdio.
*/
void
execError(const char *af, const char *av)
{
#ifdef USE_IOVEC
int i = 0;
struct iovec iov[8];
#define IOADD(s) \
(void)(iov[i].iov_base = UNCONST(s), \
iov[i].iov_len = strlen(iov[i].iov_base), \
i++)
#else
#define IOADD(s) (void)write(2, s, strlen(s))
#endif
IOADD(progname);
IOADD(": ");
IOADD(af);
IOADD("(");
IOADD(av);
IOADD(") failed (");
IOADD(strerror(errno));
IOADD(")\n");
#ifdef USE_IOVEC
while (writev(2, iov, 8) == -1 && errno == EAGAIN)
continue;
#endif
}
/*
* usage --
* exit with usage message
*/
static void
usage(void)
{
char *p;
if ((p = strchr(progname, '[')) != NULL)
*p = '\0';
(void)fprintf(stderr,
"usage: %s [-BeikNnqrstWwX] \n\
[-C directory] [-D variable] [-d flags] [-f makefile]\n\
[-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\
[-V variable] [-v variable] [variable=value] [target ...]\n",
progname);
exit(2);
}
/*
* realpath(3) can get expensive, cache results...
*/
static GNode *cached_realpaths = NULL;
static GNode *
get_cached_realpaths(void)
{
if (!cached_realpaths) {
cached_realpaths = Targ_NewGN("Realpath");
#ifndef DEBUG_REALPATH_CACHE
cached_realpaths->flags = INTERNAL;
#endif
}
return cached_realpaths;
}
/* purge any relative paths */
static void
purge_cached_realpaths(void)
{
GNode *cache = get_cached_realpaths();
Hash_Entry *he, *nhe;
Hash_Search hs;
he = Hash_EnumFirst(&cache->context, &hs);
while (he) {
nhe = Hash_EnumNext(&hs);
if (he->name[0] != '/') {
if (DEBUG(DIR))
fprintf(stderr, "cached_realpath: purging %s\n", he->name);
Hash_DeleteEntry(&cache->context, he);
}
he = nhe;
}
}
char *
cached_realpath(const char *pathname, char *resolved)
{
GNode *cache;
char *rp, *cp;
if (!pathname || !pathname[0])
return NULL;
cache = get_cached_realpaths();
if ((rp = Var_Value(pathname, cache, &cp)) != NULL) {
/* a hit */
strlcpy(resolved, rp, MAXPATHLEN);
} else if ((rp = realpath(pathname, resolved)) != NULL) {
Var_Set(pathname, rp, cache);
} /* else should we negative-cache? */
free(cp);
return rp ? resolved : NULL;
}
int
PrintAddr(void *a, void *b)
{
printf("%lx ", (unsigned long) a);
return b ? 0 : 0;
}
static int
addErrorCMD(void *cmdp, void *gnp MAKE_ATTR_UNUSED)
{
if (cmdp == NULL)
return 1; /* stop */
Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL);
return 0;
}
/*
* Return true if we should die without noise.
* For example our failing child was a sub-make
* or failure happend elsewhere.
*/
int
dieQuietly(GNode *gn, int bf)
{
static int quietly = -1;
if (quietly < 0) {
if (DEBUG(JOB) || getBoolean(".MAKE.DIE_QUIETLY", 1) == 0)
quietly = 0;
else if (bf >= 0)
quietly = bf;
else
quietly = (gn) ? ((gn->type & (OP_MAKE)) != 0) : 0;
}
return quietly;
}
void
PrintOnError(GNode *gn, const char *s)
{
static GNode *en = NULL;
char tmp[64];
char *cp;
/* we generally want to keep quiet if a sub-make died */
if (dieQuietly(gn, -1))
return;
if (s)
printf("%s", s);
printf("\n%s: stopped in %s\n", progname, curdir);
if (en)
return; /* we've been here! */
if (gn) {
/*
* We can print this even if there is no .ERROR target.
*/
Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL);
Var_Delete(".ERROR_CMD", VAR_GLOBAL);
Lst_ForEach(gn->commands, addErrorCMD, gn);
}
strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}",
sizeof(tmp) - 1);
cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
if (cp) {
if (*cp)
printf("%s", cp);
free(cp);
}
fflush(stdout);
/*
* Finally, see if there is a .ERROR target, and run it if so.
*/
en = Targ_FindNode(".ERROR", TARG_NOCREATE);
if (en) {
en->type |= OP_SPECIAL;
Compat_Make(en, en);
}
}
void
Main_ExportMAKEFLAGS(Boolean first)
{
static int once = 1;
char tmp[64];
char *s;
if (once != first)
return;
once = 0;
strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}",
sizeof(tmp));
s = Var_Subst(NULL, tmp, VAR_CMD, VARF_WANTRES);
if (s && *s) {
#ifdef POSIX
setenv("MAKEFLAGS", s, 1);
#else
setenv("MAKE", s, 1);
#endif
}
}
char *
getTmpdir(void)
{
static char *tmpdir = NULL;
if (!tmpdir) {
struct stat st;
/*
* Honor $TMPDIR but only if it is valid.
* Ensure it ends with /.
*/
tmpdir = Var_Subst(NULL, "${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL,
VARF_WANTRES);
if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) {
free(tmpdir);
tmpdir = bmake_strdup(_PATH_TMP);
}
}
return tmpdir;
}
/*
* Create and open a temp file using "pattern".
* If "fnamep" is provided set it to a copy of the filename created.
* Otherwise unlink the file once open.
*/
int
mkTempFile(const char *pattern, char **fnamep)
{
static char *tmpdir = NULL;
char tfile[MAXPATHLEN];
int fd;
if (!pattern)
pattern = TMPPAT;
if (!tmpdir)
tmpdir = getTmpdir();
if (pattern[0] == '/') {
snprintf(tfile, sizeof(tfile), "%s", pattern);
} else {
snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern);
}
if ((fd = mkstemp(tfile)) < 0)
Punt("Could not create temporary file %s: %s", tfile, strerror(errno));
if (fnamep) {
*fnamep = bmake_strdup(tfile);
} else {
unlink(tfile); /* we just want the descriptor */
}
return fd;
}
/*
* Convert a string representation of a boolean.
* Anything that looks like "No", "False", "Off", "0" etc,
* is FALSE, otherwise TRUE.
*/
Boolean
s2Boolean(const char *s, Boolean bf)
{
if (s) {
switch(*s) {
case '\0': /* not set - the default wins */
break;
case '0':
case 'F':
case 'f':
case 'N':
case 'n':
bf = FALSE;
break;
case 'O':
case 'o':
switch (s[1]) {
case 'F':
case 'f':
bf = FALSE;
break;
default:
bf = TRUE;
break;
}
break;
default:
bf = TRUE;
break;
}
}
return bf;
}
/*
* Return a Boolean based on setting of a knob.
*
* If the knob is not set, the supplied default is the return value.
* If set, anything that looks or smells like "No", "False", "Off", "0" etc,
* is FALSE, otherwise TRUE.
*/
Boolean
getBoolean(const char *name, Boolean bf)
{
char tmp[64];
char *cp;
if (snprintf(tmp, sizeof(tmp), "${%s:U:tl}", name) < (int)(sizeof(tmp))) {
cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
if (cp) {
bf = s2Boolean(cp, bf);
free(cp);
}
}
return bf;
}
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