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Annotation of src/usr.bin/make/error.c, Revision 1.1

1.1     ! espie       1: /* $OpenBSD$ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1988, 1989, 1990, 1993
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  * Copyright (c) 1989 by Berkeley Softworks
        !             7:  * All rights reserved.
        !             8:  *
        !             9:  * This code is derived from software contributed to Berkeley by
        !            10:  * Adam de Boor.
        !            11:  *
        !            12:  * Redistribution and use in source and binary forms, with or without
        !            13:  * modification, are permitted provided that the following conditions
        !            14:  * are met:
        !            15:  * 1. Redistributions of source code must retain the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer.
        !            17:  * 2. Redistributions in binary form must reproduce the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer in the
        !            19:  *    documentation and/or other materials provided with the distribution.
        !            20:  * 3. All advertising materials mentioning features or use of this software
        !            21:  *    must display the following acknowledgement:
        !            22:  *     This product includes software developed by the University of
        !            23:  *     California, Berkeley and its contributors.
        !            24:  * 4. Neither the name of the University nor the names of its contributors
        !            25:  *    may be used to endorse or promote products derived from this software
        !            26:  *    without specific prior written permission.
        !            27:  *
        !            28:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            29:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            30:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            31:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            32:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            33:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            34:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            35:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            36:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            37:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            38:  * SUCH DAMAGE.
        !            39:  */
        !            40:
        !            41: #include <sys/types.h>
        !            42: #include <sys/stat.h>
        !            43: #include <errno.h>
        !            44: #include <stdio.h>
        !            45: #include <stdlib.h>
        !            46: #include <string.h>
        !            47: #include <unistd.h>
        !            48: #include "error.h"
        !            49:
        !            50: static void enomem __P((size_t));
        !            51:
        !            52: /*
        !            53:  * emalloc --
        !            54:  *     malloc, but die on error.
        !            55:  */
        !            56: void *
        !            57: emalloc(len)
        !            58:        size_t len;
        !            59: {
        !            60:        void *p;
        !            61:
        !            62:        if ((p = malloc(len)) == NULL)
        !            63:                enomem(len);
        !            64:        return p;
        !            65: }
        !            66:
        !            67: /*
        !            68:  * estrdup --
        !            69:  *     strdup, but die on error.
        !            70:  */
        !            71: char *
        !            72: estrdup(str)
        !            73:        const char *str;
        !            74: {
        !            75:        char *p;
        !            76:        size_t size;
        !            77:
        !            78:        size = strlen(str) + 1;
        !            79:
        !            80:        p = emalloc(size);
        !            81:        memcpy(p, str, size);
        !            82:        return p;
        !            83: }
        !            84:
        !            85: /*
        !            86:  * erealloc --
        !            87:  *     realloc, but die on error.
        !            88:  */
        !            89: void *
        !            90: erealloc(ptr, size)
        !            91:        void *ptr;
        !            92:        size_t size;
        !            93: {
        !            94:        if ((ptr = realloc(ptr, size)) == NULL)
        !            95:                enomem(size);
        !            96:        return ptr;
        !            97: }
        !            98:
        !            99: void *
        !           100: ecalloc(s1, s2)
        !           101:        size_t s1;
        !           102:        size_t s2;
        !           103: {
        !           104:        void *p;
        !           105:
        !           106:        if ((p = calloc(s1, s2)) == NULL)
        !           107:                enomem(s1 * s2);
        !           108:        return p;
        !           109: }
        !           110:
        !           111: /*
        !           112:  * enomem --
        !           113:  *     die when out of memory.
        !           114:  */
        !           115: void
        !           116: enomem(size)
        !           117:        size_t size;
        !           118: {
        !           119:        int myerr = errno;
        !           120:
        !           121:        fprintf(stderr, "make: %s (%d)\n", strerror(myerr), size);
        !           122:        exit(2);
        !           123: }
        !           124:
        !           125: /*
        !           126:  * enunlink --
        !           127:  *     Remove a file carefully, avoiding directories.
        !           128:  */
        !           129: int
        !           130: eunlink(file)
        !           131:        const char *file;
        !           132: {
        !           133:        struct stat st;
        !           134:
        !           135:        if (lstat(file, &st) == -1)
        !           136:                return -1;
        !           137:
        !           138:        if (S_ISDIR(st.st_mode)) {
        !           139:                errno = EISDIR;
        !           140:                return -1;
        !           141:        }
        !           142:        return unlink(file);
        !           143: }
        !           144: