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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2011, 2014-2020 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 <string.h>
#include <sudo_compat.h>
#include <sudo_debug.h>
#include <sudo_util.h>
#include <sudo_eventlog.h>
size_t
eventlog_writeln(FILE * restrict fp, char * restrict line, size_t linelen, size_t maxlen)
{
const char *indent = "";
char *beg = line;
char *end;
int len;
size_t outlen = 0;
debug_decl(eventlog_writeln, SUDO_DEBUG_UTIL);
if (maxlen < sizeof(EVENTLOG_INDENT)) {
/* Maximum length too small, disable wrapping. */
outlen = fwrite(line, 1, linelen, fp);
if (outlen != linelen)
debug_return_size_t((size_t)-1);
if (fputc('\n', fp) == EOF)
debug_return_size_t((size_t)-1);
debug_return_size_t(outlen + 1);
}
/*
* Print out line with word wrap around maxlen characters.
*/
while (linelen > maxlen) {
end = beg + maxlen;
while (end != beg && *end != ' ')
end--;
if (beg == end) {
/* Unable to find word break within maxlen, look beyond. */
end = strchr(beg + maxlen, ' ');
if (end == NULL)
break; /* no word break */
}
len = fprintf(fp, "%s%.*s\n", indent, (int)(end - beg), beg);
if (len < 0)
debug_return_size_t((size_t)-1);
outlen += (size_t)len;
while (*end == ' ')
end++;
linelen -= (size_t)(end - beg);
beg = end;
if (indent[0] == '\0') {
indent = EVENTLOG_INDENT;
maxlen -= sizeof(EVENTLOG_INDENT) - 1;
}
}
/* Print remainder, if any. */
if (linelen) {
len = fprintf(fp, "%s%s\n", indent, beg);
if (len < 0)
debug_return_size_t((size_t)-1);
outlen += (size_t)len;
}
debug_return_size_t(outlen);
}
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