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author | gshapiro <gshapiro@FreeBSD.org> | 2002-02-17 21:56:45 +0000 |
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committer | gshapiro <gshapiro@FreeBSD.org> | 2002-02-17 21:56:45 +0000 |
commit | 8449595fe97f4474b9b9a7e4edee1ef35dcff393 (patch) | |
tree | e7a33b132264d449a512ddf4a8685df097669c1d /contrib/sendmail/libsm/vasprintf.c | |
parent | 289b381b31415647269c7520d881017e2dcb27f1 (diff) | |
download | FreeBSD-src-8449595fe97f4474b9b9a7e4edee1ef35dcff393.zip FreeBSD-src-8449595fe97f4474b9b9a7e4edee1ef35dcff393.tar.gz |
Import sendmail 8.12.2
Diffstat (limited to 'contrib/sendmail/libsm/vasprintf.c')
-rw-r--r-- | contrib/sendmail/libsm/vasprintf.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/contrib/sendmail/libsm/vasprintf.c b/contrib/sendmail/libsm/vasprintf.c new file mode 100644 index 0000000..9b3a12e --- /dev/null +++ b/contrib/sendmail/libsm/vasprintf.c @@ -0,0 +1,115 @@ +/* + * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. + * All rights reserved. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + */ + +/* + * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sm/gen.h> +SM_RCSID("@(#)$Id: vasprintf.c,v 1.26 2001/09/11 04:04:49 gshapiro Exp $") +#include <stdlib.h> +#include <errno.h> +#include <sm/io.h> +#include <sm/heap.h> +#include "local.h" + +/* +** SM_VASPRINTF -- printf to a dynamically allocated string +** +** Write 'printf' output to a dynamically allocated string +** buffer which is returned to the caller. +** +** Parameters: +** str -- *str receives a pointer to the allocated string +** fmt -- format directives for printing +** ap -- variable argument list +** +** Results: +** On failure, set *str to NULL, set errno, and return -1. +** +** On success, set *str to a pointer to a nul-terminated +** string buffer containing printf output, and return the +** length of the string (not counting the nul). +*/ + +#define SM_VA_BUFSIZE 128 + +int +sm_vasprintf(str, fmt, ap) + char **str; + const char *fmt; + SM_VA_LOCAL_DECL +{ + int ret; + SM_FILE_T fake; + unsigned char *base; + + fake.sm_magic = SmFileMagic; + fake.f_timeout = SM_TIME_FOREVER; + fake.f_timeoutstate = SM_TIME_BLOCK; + fake.f_file = -1; + fake.f_flags = SMWR | SMSTR | SMALC; + fake.f_bf.smb_base = fake.f_p = (unsigned char *)sm_malloc(SM_VA_BUFSIZE); + if (fake.f_bf.smb_base == NULL) + goto err2; + fake.f_close = NULL; + fake.f_open = NULL; + fake.f_read = NULL; + fake.f_write = NULL; + fake.f_seek = NULL; + fake.f_setinfo = fake.f_getinfo = NULL; + fake.f_type = "sm_vasprintf:fake"; + fake.f_bf.smb_size = fake.f_w = SM_VA_BUFSIZE - 1; + fake.f_timeout = SM_TIME_FOREVER; + ret = sm_io_vfprintf(&fake, SM_TIME_FOREVER, fmt, ap); + if (ret == -1) + goto err; + *fake.f_p = '\0'; + + /* use no more space than necessary */ + base = (unsigned char *) sm_realloc(fake.f_bf.smb_base, ret + 1); + if (base == NULL) + goto err; + *str = (char *)base; + return ret; + +err: + if (fake.f_bf.smb_base != NULL) + { + sm_free(fake.f_bf.smb_base); + fake.f_bf.smb_base = NULL; + } +err2: + *str = NULL; + errno = ENOMEM; + return -1; +} |