Annotation of src/usr.bin/sudo/alloc.c, Revision 1.1
1.1 ! millert 1: /*
! 2: * Copyright (c) 1999 Todd C. Miller <Todd.Miller@courtesan.com>
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: *
! 9: * 1. Redistributions of source code must retain the above copyright
! 10: * notice, this list of conditions and the following disclaimer.
! 11: *
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * 3. The name of the author may not be used to endorse or promote products
! 17: * derived from this software without specific prior written permission.
! 18: *
! 19: * 4. Products derived from this software may not be called "Sudo" nor
! 20: * may "Sudo" appear in their names without specific prior written
! 21: * permission from the author.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! 24: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
! 25: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
! 26: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 27: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 28: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 29: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 30: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 31: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 32: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 33: */
! 34:
! 35: #include "config.h"
! 36:
! 37: #include <stdio.h>
! 38: #ifdef STDC_HEADERS
! 39: #include <stdlib.h>
! 40: #endif /* STDC_HEADERS */
! 41: #ifdef HAVE_STRING_H
! 42: #include <string.h>
! 43: #endif /* HAVE_STRING_H */
! 44: #ifdef HAVE_STRINGS_H
! 45: #include <strings.h>
! 46: #endif /* HAVE_STRINGS_H */
! 47: #if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
! 48: #include <malloc.h>
! 49: #endif /* HAVE_MALLOC_H && !STDC_HEADERS */
! 50: #include <sys/param.h>
! 51: #include <sys/types.h>
! 52:
! 53: #include "sudo.h"
! 54:
! 55: #ifndef STDC_HEADERS
! 56: #if !defined(__GNUC__) && !defined(HAVE_MALLOC_H)
! 57: extern VOID *malloc __P((size_t));
! 58: #endif /* !__GNUC__ && !HAVE_MALLOC_H */
! 59: #endif /* !STDC_HEADERS */
! 60:
! 61: extern char **Argv; /* from sudo.c */
! 62:
! 63: #ifndef lint
! 64: static const char rcsid[] = "$Sudo: alloc.c,v 1.8 1999/07/31 16:19:44 millert Exp $";
! 65: #endif /* lint */
! 66:
! 67:
! 68: /*
! 69: * emalloc() calls the system malloc(3) and exits with an error if
! 70: * malloc(3) fails.
! 71: */
! 72: VOID *
! 73: emalloc(size)
! 74: size_t size;
! 75: {
! 76: VOID *ptr;
! 77:
! 78: if ((ptr = malloc(size)) == NULL) {
! 79: (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
! 80: exit(1);
! 81: }
! 82: return(ptr);
! 83: }
! 84:
! 85: /*
! 86: * erealloc() calls the system realloc(3) and exits with an error if
! 87: * realloc(3) fails. You can call erealloc() with a NULL pointer even
! 88: * if the system realloc(3) does not support this.
! 89: */
! 90: VOID *
! 91: erealloc(ptr, size)
! 92: VOID *ptr;
! 93: size_t size;
! 94: {
! 95:
! 96: if ((ptr = ptr ? realloc(ptr, size) : malloc(size)) == NULL) {
! 97: (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
! 98: exit(1);
! 99: }
! 100: return(ptr);
! 101: }
! 102:
! 103: /*
! 104: * estrdup() is like strdup(3) except that it exits with an error if
! 105: * malloc(3) fails. NOTE: unlike strdup(3), estrdup(NULL) is legal.
! 106: */
! 107: char *
! 108: estrdup(src)
! 109: const char *src;
! 110: {
! 111: char *dst = NULL;
! 112:
! 113: if (src != NULL) {
! 114: dst = (char *) emalloc(strlen(src) + 1);
! 115: (void) strcpy(dst, src);
! 116: }
! 117: return(dst);
! 118: }
! 119:
! 120: /*
! 121: * easprintf() calls vasprintf() and exits with an error if vasprintf()
! 122: * returns -1 (out of memory).
! 123: */
! 124: void
! 125: #ifdef __STDC__
! 126: easprintf(char **ret, const char *fmt, ...)
! 127: #else
! 128: easprintf(va_alist)
! 129: va_dcl
! 130: #endif
! 131: {
! 132: int len;
! 133: va_list ap;
! 134: #ifdef __STDC__
! 135: va_start(ap, fmt);
! 136: #else
! 137: char **ret;
! 138: const char *fmt;
! 139:
! 140: va_start(ap);
! 141: ret = va_arg(ap, char **);
! 142: fmt = va_arg(ap, const char *);
! 143: #endif
! 144: len = vasprintf(ret, fmt, ap);
! 145: va_end(ap);
! 146:
! 147: if (len == -1) {
! 148: (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
! 149: exit(1);
! 150: }
! 151: }
! 152:
! 153: /*
! 154: * evasprintf() calls vasprintf() and exits with an error if vasprintf()
! 155: * returns -1 (out of memory).
! 156: */
! 157: void
! 158: evasprintf(ret, format, args)
! 159: char **ret;
! 160: const char *format;
! 161: va_list args;
! 162: {
! 163:
! 164: if (vasprintf(ret, format, args) == -1) {
! 165: (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
! 166: exit(1);
! 167: }
! 168: }
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