b7aa600c41
I have worked hard to reduce diffs against the vendor branch. One notable change in that respect is that we no longer prefer DSA over RSA - the reasons for doing so went away years ago. This may cause some surprises, as ssh will warn about unknown host keys even for hosts whose keys haven't changed. MFC after: 6 weeks
102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/*
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* Copyright (c) 2004 Darren Tucker.
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*
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* Based originally on asprintf.c from OpenBSD:
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* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "includes.h"
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#ifndef HAVE_VASPRINTF
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#include <errno.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#ifndef VA_COPY
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# ifdef HAVE_VA_COPY
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# define VA_COPY(dest, src) va_copy(dest, src)
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# else
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# ifdef HAVE___VA_COPY
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# define VA_COPY(dest, src) __va_copy(dest, src)
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# else
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# define VA_COPY(dest, src) (dest) = (src)
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# endif
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# endif
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#endif
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#define INIT_SZ 128
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int
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vasprintf(char **str, const char *fmt, va_list ap)
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{
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int ret = -1;
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va_list ap2;
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char *string, *newstr;
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size_t len;
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VA_COPY(ap2, ap);
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if ((string = malloc(INIT_SZ)) == NULL)
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goto fail;
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ret = vsnprintf(string, INIT_SZ, fmt, ap2);
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if (ret >= 0 && ret < INIT_SZ) { /* succeeded with initial alloc */
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*str = string;
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} else if (ret == INT_MAX || ret < 0) { /* Bad length */
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free(string);
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goto fail;
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} else { /* bigger than initial, realloc allowing for nul */
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len = (size_t)ret + 1;
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if ((newstr = realloc(string, len)) == NULL) {
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free(string);
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goto fail;
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} else {
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va_end(ap2);
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VA_COPY(ap2, ap);
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ret = vsnprintf(newstr, len, fmt, ap2);
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if (ret >= 0 && (size_t)ret < len) {
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*str = newstr;
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} else { /* failed with realloc'ed string, give up */
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free(newstr);
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goto fail;
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}
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}
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}
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va_end(ap2);
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return (ret);
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fail:
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*str = NULL;
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errno = ENOMEM;
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va_end(ap2);
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return (-1);
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}
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#endif
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#ifndef HAVE_ASPRINTF
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int asprintf(char **str, const char *fmt, ...)
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{
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va_list ap;
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int ret;
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*str = NULL;
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va_start(ap, fmt);
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ret = vasprintf(str, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif
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