2 * Copyright (c) 1999-2005, 2007
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Sponsored in part by the Defense Advanced Research Projects
18 * Agency (DARPA) and Air Force Research Laboratory, Air Force
19 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
24 #include <sys/types.h>
25 #include <sys/param.h>
34 #endif /* STDC_HEADERS */
38 # ifdef HAVE_STRINGS_H
41 #endif /* HAVE_STRING_H */
42 #if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
44 #endif /* HAVE_MALLOC_H && !STDC_HEADERS */
45 #ifdef HAVE_INTTYPES_H
46 # include <inttypes.h>
52 * If there is no SIZE_MAX or SIZE_T_MAX we have to assume that size_t
53 * could be signed (as it is on SunOS 4.x). This just means that
54 * emalloc2() and erealloc3() cannot allocate huge amounts on such a
55 * platform but that is OK since sudo doesn't need to do so anyway.
59 # define SIZE_MAX SIZE_T_MAX
61 # define SIZE_MAX INT_MAX
62 # endif /* SIZE_T_MAX */
66 * emalloc() calls the system malloc(3) and exits with an error if
76 errorx(1, "internal error, tried to emalloc(0)");
78 if ((ptr = malloc(size)) == NULL)
79 errorx(1, "unable to allocate memory");
84 * emalloc2() allocates nmemb * size bytes and exits with an error
85 * if overflow would occur or if the system malloc(3) fails.
94 if (nmemb == 0 || size == 0)
95 errorx(1, "internal error, tried to emalloc2(0)");
96 if (nmemb > SIZE_MAX / size)
97 errorx(1, "internal error, emalloc2() overflow");
100 if ((ptr = malloc(size)) == NULL)
101 errorx(1, "unable to allocate memory");
106 * erealloc() calls the system realloc(3) and exits with an error if
107 * realloc(3) fails. You can call erealloc() with a NULL pointer even
108 * if the system realloc(3) does not support this.
117 errorx(1, "internal error, tried to erealloc(0)");
119 ptr = ptr ? realloc(ptr, size) : malloc(size);
121 errorx(1, "unable to allocate memory");
126 * erealloc3() realloc(3)s nmemb * size bytes and exits with an error
127 * if overflow would occur or if the system malloc(3)/realloc(3) fails.
128 * You can call erealloc() with a NULL pointer even if the system realloc(3)
129 * does not support this.
132 erealloc3(ptr, nmemb, size)
138 if (nmemb == 0 || size == 0)
139 errorx(1, "internal error, tried to erealloc3(0)");
140 if (nmemb > SIZE_MAX / size)
141 errorx(1, "internal error, erealloc3() overflow");
144 ptr = ptr ? realloc(ptr, size) : malloc(size);
146 errorx(1, "unable to allocate memory");
151 * estrdup() is like strdup(3) except that it exits with an error if
152 * malloc(3) fails. NOTE: unlike strdup(3), estrdup(NULL) is legal.
162 size = strlen(src) + 1;
163 dst = (char *) emalloc(size);
164 (void) memcpy(dst, src, size);
170 * easprintf() calls vasprintf() and exits with an error if vasprintf()
171 * returns -1 (out of memory).
175 easprintf(char **ret, const char *fmt, ...)
177 easprintf(ret, fmt, va_alist)
190 len = vasprintf(ret, fmt, ap);
194 errorx(1, "unable to allocate memory");
199 * evasprintf() calls vasprintf() and exits with an error if vasprintf()
200 * returns -1 (out of memory).
203 evasprintf(ret, format, args)
210 if ((len = vasprintf(ret, format, args)) == -1)
211 errorx(1, "unable to allocate memory");
216 * Wrapper for free(3) so we can depend on C89 semantics.