2 * Copyright (c) 1999-2005, 2007, 2010
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 */
37 #endif /* HAVE_STRING_H */
40 #endif /* HAVE_STRING_H */
41 #if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
43 #endif /* HAVE_MALLOC_H && !STDC_HEADERS */
44 #ifdef HAVE_INTTYPES_H
45 # include <inttypes.h>
51 * If there is no SIZE_MAX or SIZE_T_MAX we have to assume that size_t
52 * could be signed (as it is on SunOS 4.x). This just means that
53 * emalloc2() and erealloc3() cannot allocate huge amounts on such a
54 * platform but that is OK since sudo doesn't need to do so anyway.
58 # define SIZE_MAX SIZE_T_MAX
60 # define SIZE_MAX INT_MAX
61 # endif /* SIZE_T_MAX */
65 * emalloc() calls the system malloc(3) and exits with an error if
75 errorx(1, "internal error, tried to emalloc(0)");
77 if ((ptr = malloc(size)) == NULL)
78 errorx(1, "unable to allocate memory");
83 * emalloc2() allocates nmemb * size bytes and exits with an error
84 * if overflow would occur or if the system malloc(3) fails.
93 if (nmemb == 0 || size == 0)
94 errorx(1, "internal error, tried to emalloc2(0)");
95 if (nmemb > SIZE_MAX / size)
96 errorx(1, "internal error, emalloc2() overflow");
99 if ((ptr = malloc(size)) == NULL)
100 errorx(1, "unable to allocate memory");
105 * erealloc() calls the system realloc(3) and exits with an error if
106 * realloc(3) fails. You can call erealloc() with a NULL pointer even
107 * if the system realloc(3) does not support this.
116 errorx(1, "internal error, tried to erealloc(0)");
118 ptr = ptr ? realloc(ptr, size) : malloc(size);
120 errorx(1, "unable to allocate memory");
125 * erealloc3() realloc(3)s nmemb * size bytes and exits with an error
126 * if overflow would occur or if the system malloc(3)/realloc(3) fails.
127 * You can call erealloc() with a NULL pointer even if the system realloc(3)
128 * does not support this.
131 erealloc3(ptr, nmemb, size)
137 if (nmemb == 0 || size == 0)
138 errorx(1, "internal error, tried to erealloc3(0)");
139 if (nmemb > SIZE_MAX / size)
140 errorx(1, "internal error, erealloc3() overflow");
143 ptr = ptr ? realloc(ptr, size) : malloc(size);
145 errorx(1, "unable to allocate memory");
150 * estrdup() is like strdup(3) except that it exits with an error if
151 * malloc(3) fails. NOTE: unlike strdup(3), estrdup(NULL) is legal.
161 size = strlen(src) + 1;
162 dst = (char *) emalloc(size);
163 (void) memcpy(dst, src, size);
169 * easprintf() calls vasprintf() and exits with an error if vasprintf()
170 * returns -1 (out of memory).
174 easprintf(char **ret, const char *fmt, ...)
176 easprintf(ret, fmt, va_alist)
189 len = vasprintf(ret, fmt, ap);
193 errorx(1, "unable to allocate memory");
198 * evasprintf() calls vasprintf() and exits with an error if vasprintf()
199 * returns -1 (out of memory).
202 evasprintf(ret, format, args)
209 if ((len = vasprintf(ret, format, args)) == -1)
210 errorx(1, "unable to allocate memory");
215 * Wrapper for free(3) so we can depend on C89 semantics.