diff options
Diffstat (limited to 'contrib/file/src/dprintf.c')
-rw-r--r-- | contrib/file/src/dprintf.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/contrib/file/src/dprintf.c b/contrib/file/src/dprintf.c new file mode 100644 index 0000000..3ae1581 --- /dev/null +++ b/contrib/file/src/dprintf.c @@ -0,0 +1,58 @@ +/* + * Copyright (c) Ian F. Darwin 1986-1995. + * Software written by Ian F. Darwin and others; + * maintained 1995-present by Christos Zoulas and others. + * + * 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 immediately at the beginning of the file, without modification, + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 "file.h" + +#ifndef lint +FILE_RCSID("@(#)$File: dprintf.c,v 1.1 2015/11/13 15:36:14 christos Exp $") +#endif /* lint */ + +#include <assert.h> +#include <unistd.h> +#include <stdio.h> +#include <stdarg.h> + +int +dprintf(int fd, const char *fmt, ...) +{ + va_list ap; + /* Simpler than using vasprintf() here, since we never need more */ + char buf[1024]; + int len; + + va_start(ap, fmt); + len = vsnprintf(buf, sizeof(buf), fmt, ap); + va_end(ap); + + if ((size_t)len >= sizeof(buf)) + return -1; + + if (write(fd, buf, (size_t)len) != len) + return -1; + + return len; +} |