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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2010-2012 Todd C. Miller <Todd.Miller@sudo.ws>
*
* 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.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <sudo_compat.h>
#include <sudo_util.h>
#include <sudo_plugin.h>
#include <sudo_debug.h>
#include <pathnames.h>
static int
sudo_printf_int(int msg_type, const char * restrict fmt, ...)
{
FILE *fp = stdout;
FILE *ttyfp = NULL;
char sbuf[8192];
char *buf = sbuf;
va_list ap;
int len;
if (ISSET(msg_type, SUDO_CONV_PREFER_TTY)) {
/* Try writing to /dev/tty first. */
ttyfp = fopen(_PATH_TTY, "w");
}
switch (msg_type & 0xff) {
case SUDO_CONV_ERROR_MSG:
fp = stderr;
FALLTHROUGH;
case SUDO_CONV_INFO_MSG:
/*
* We use vsnprintf() instead of vfprintf() here to avoid
* problems on systems where the system printf(3) is not
* C99-compliant. We use our own snprintf() on such systems.
*/
va_start(ap, fmt);
len = vsnprintf(sbuf, sizeof(sbuf), fmt, ap);
va_end(ap);
if (len < 0 || len >= ssizeof(sbuf)) {
/* Try again with a dynamically-sized buffer. */
va_start(ap, fmt);
len = vasprintf(&buf, fmt, ap);
va_end(ap);
}
if (len != -1) {
if (fwrite(buf, 1, len, ttyfp ? ttyfp : fp) == 0)
len = -1;
if (buf != sbuf)
free(buf);
}
break;
default:
len = -1;
errno = EINVAL;
break;
}
if (ttyfp != NULL)
fclose(ttyfp);
return len;
}
sudo_printf_t sudo_printf = sudo_printf_int;
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