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/*
** Zabbix
** Copyright (C) 2001-2018 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#if defined(_WINDOWS)
int __zbx_open(const char *pathname, int flags)
{
int ret;
wchar_t *wpathname;
wpathname = zbx_utf8_to_unicode(pathname);
ret = _wopen(wpathname, flags);
zbx_free(wpathname);
return ret;
}
#endif
void find_cr_lf_szbyte(const char *encoding, const char **cr, const char **lf, size_t *szbyte)
{
/* default is single-byte character set */
*cr = "\r";
*lf = "\n";
*szbyte = 1;
if ('\0' != *encoding)
{
if (0 == strcasecmp(encoding, "UNICODE") || 0 == strcasecmp(encoding, "UNICODELITTLE") ||
0 == strcasecmp(encoding, "UTF-16") || 0 == strcasecmp(encoding, "UTF-16LE") ||
0 == strcasecmp(encoding, "UTF16") || 0 == strcasecmp(encoding, "UTF16LE") ||
0 == strcasecmp(encoding, "UCS-2") || 0 == strcasecmp(encoding, "UCS-2LE"))
{
*cr = "\r\0";
*lf = "\n\0";
*szbyte = 2;
}
else if (0 == strcasecmp(encoding, "UNICODEBIG") || 0 == strcasecmp(encoding, "UNICODEFFFE") ||
0 == strcasecmp(encoding, "UTF-16BE") || 0 == strcasecmp(encoding, "UTF16BE") ||
0 == strcasecmp(encoding, "UCS-2BE"))
{
*cr = "\0\r";
*lf = "\0\n";
*szbyte = 2;
}
else if (0 == strcasecmp(encoding, "UTF-32") || 0 == strcasecmp(encoding, "UTF-32LE") ||
0 == strcasecmp(encoding, "UTF32") || 0 == strcasecmp(encoding, "UTF32LE"))
{
*cr = "\r\0\0\0";
*lf = "\n\0\0\0";
*szbyte = 4;
}
else if (0 == strcasecmp(encoding, "UTF-32BE") || 0 == strcasecmp(encoding, "UTF32BE"))
{
*cr = "\0\0\0\r";
*lf = "\0\0\0\n";
*szbyte = 4;
}
}
}
/******************************************************************************
* *
* Function: zbx_read *
* *
* Purpose: Read one text line from a file descriptor into buffer *
* *
* Parameters: fd - [IN] file descriptor to read from *
* buf - [IN] buffer to read into *
* count - [IN] buffer size in bytes *
* encoding - [IN] pointer to a text string describing encoding. *
* See function find_cr_lf_szbyte() for supported *
* encodings. *
* "" (empty string) means a single-byte character set.*
* *
* Return value: On success, the number of bytes read is returned (0 (zero) *
* indicates end of file). *
* On error, -1 is returned and errno is set appropriately. *
* *
* Comments: Reading stops after a newline. If the newline is read, it is *
* stored into the buffer. *
* *
******************************************************************************/
int zbx_read(int fd, char *buf, size_t count, const char *encoding)
{
size_t i, szbyte, nbytes;
const char *cr, *lf;
zbx_offset_t offset;
if ((zbx_offset_t)-1 == (offset = zbx_lseek(fd, 0, SEEK_CUR)))
return -1;
if (0 >= (nbytes = read(fd, buf, (unsigned int)count)))
return (int)nbytes;
find_cr_lf_szbyte(encoding, &cr, &lf, &szbyte);
for (i = 0; i <= nbytes - szbyte; i += szbyte)
{
if (0 == memcmp(&buf[i], lf, szbyte)) /* LF (Unix) */
{
i += szbyte;
break;
}
if (0 == memcmp(&buf[i], cr, szbyte)) /* CR (Mac) */
{
/* CR+LF (Windows) ? */
if (i < nbytes - szbyte && 0 == memcmp(&buf[i + szbyte], lf, szbyte))
i += szbyte;
i += szbyte;
break;
}
}
if ((zbx_offset_t)-1 == zbx_lseek(fd, offset + (zbx_offset_t)i, SEEK_SET))
return -1;
return (int)i;
}
int zbx_is_regular_file(const char *path)
{
zbx_stat_t st;
if (0 == zbx_stat(path, &st) && 0 != S_ISREG(st.st_mode))
return SUCCEED;
return FAIL;
}
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