source: trunk/src/kmk/util.c@ 18

/*
 * Copyright (c) 2002 Juli Mallett.  All rights reserved.
 * 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
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/make/util.c,v 1.12 2002/10/10 19:27:48 jmallett Exp $");

/*-
 * util.c --
 *      General utilitarian routines for make(1).
 */

#include <sys/types.h>
#include <sys/stat.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"

/*-
 * 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(void)
{
        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, with the number of errors encountered in Make_Make.
 *
 * Results:
 *      None
 *
 * Side Effects:
 *      The program exits
 */
void
Finish(int errors)
{
        Fatal("%d error%s", errors, errors == 1 ? "" : "s");
}

/*
 * emalloc --
 *      malloc, but die on error.
 */
void *
emalloc(size_t len)
{
        void *p;

        if ((p = malloc(len)) == NULL)
                enomem();
        return(p);
}

/*
 * estrdup --
 *      strdup, but die on error.
 */
char *
estrdup(const char *str)
{
        char *p;

        if ((p = strdup(str)) == NULL)
                enomem();
        return(p);
}

/*
 * erealloc --
 *      realloc, but die on error.
 */
void *
erealloc(void *ptr, size_t size)
{
        if ((ptr = realloc(ptr, size)) == NULL)
                enomem();
        return(ptr);
}

/*
 * enomem --
 *      die when out of memory.
 */
void
enomem(void)
{
        err(2, NULL);
}

/*
 * enunlink --
 *      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);
}

/*
 * Printaddr --
 *      Print the address of a node, used as an interative function.
 */
int
PrintAddr(void *a, void *b __unused)
{
    printf("%p ", a);
    return 0;
}