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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:26:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:26:58 +0000 |
commit | 999ae6be3243c7b4a815247199447b53c39a3d65 (patch) | |
tree | 1f35b42b5e5f462d35ba452e4dcfa188ce0543fd /openbsd-compat/bsd-asprintf.c | |
parent | Initial commit. (diff) | |
download | openssh-upstream.tar.xz openssh-upstream.zip |
Adding upstream version 1:7.9p1.upstream/1%7.9p1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | openbsd-compat/bsd-asprintf.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/openbsd-compat/bsd-asprintf.c b/openbsd-compat/bsd-asprintf.c new file mode 100644 index 0000000..1092772 --- /dev/null +++ b/openbsd-compat/bsd-asprintf.c @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2004 Darren Tucker. + * + * Based originally on asprintf.c from OpenBSD: + * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +/* + * Don't let systems with broken printf(3) avoid our replacements + * via asprintf(3)/vasprintf(3) calling libc internally. + */ +#if defined(BROKEN_SNPRINTF) +# undef HAVE_VASPRINTF +# undef HAVE_ASPRINTF +#endif + +#ifndef HAVE_VASPRINTF + +#include <errno.h> +#include <stdarg.h> +#include <stdlib.h> + +#define INIT_SZ 128 + +int +vasprintf(char **str, const char *fmt, va_list ap) +{ + int ret = -1; + va_list ap2; + char *string, *newstr; + size_t len; + + VA_COPY(ap2, ap); + if ((string = malloc(INIT_SZ)) == NULL) + goto fail; + + ret = vsnprintf(string, INIT_SZ, fmt, ap2); + if (ret >= 0 && ret < INIT_SZ) { /* succeeded with initial alloc */ + *str = string; + } else if (ret == INT_MAX || ret < 0) { /* Bad length */ + free(string); + goto fail; + } else { /* bigger than initial, realloc allowing for nul */ + len = (size_t)ret + 1; + if ((newstr = realloc(string, len)) == NULL) { + free(string); + goto fail; + } else { + va_end(ap2); + VA_COPY(ap2, ap); + ret = vsnprintf(newstr, len, fmt, ap2); + if (ret >= 0 && (size_t)ret < len) { + *str = newstr; + } else { /* failed with realloc'ed string, give up */ + free(newstr); + goto fail; + } + } + } + va_end(ap2); + return (ret); + +fail: + *str = NULL; + errno = ENOMEM; + va_end(ap2); + return (-1); +} +#endif + +#ifndef HAVE_ASPRINTF +int asprintf(char **str, const char *fmt, ...) +{ + va_list ap; + int ret; + + *str = NULL; + va_start(ap, fmt); + ret = vasprintf(str, fmt, ap); + va_end(ap); + + return ret; +} +#endif |