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67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* Formatted erase()
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*
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* Copyright (c) 2021 Joachim Wiberg <troglobit@gmail.com>
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*
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* Permission to use, copy, modify, and/or 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 <errno.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "lite.h"
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/**
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* erasef - Like erase() but with formatted string support
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* @fmt: Formatted string to be composed into a pathname
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*
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* This is a wrapper for the erase() function in lite.h, lessening the
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* burden of having to compose the filename from parts in a seprate
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* buffer.
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*
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* Returns:
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* Upon successful completion erasef() returns POSIX OK(0), otherwise,
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* -1 is returned and errno is set to indicate the error.
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*/
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int erasef(const char *fmt, ...)
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{
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va_list ap;
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char *file;
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int len;
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va_start(ap, fmt);
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len = vsnprintf(NULL, 0, fmt, ap);
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va_end(ap);
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file = alloca(len + 1);
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if (!file) {
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errno = ENOMEM;
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return -1;
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}
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va_start(ap, fmt);
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vsnprintf(file, len + 1, fmt, ap);
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va_end(ap);
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return erase(file);
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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