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/**************************************************************/
/* tpax: a topological pax implementation */
/* Copyright (C) 2020--2021 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.TPAX. */
/**************************************************************/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
int tpax_dprintf(int fd, const char * fmt, ...)
{
int ret;
int cnt;
int size;
va_list ap;
char * ch;
char * buf;
char chbuf[2048];
va_start(ap,fmt);
size = sizeof(chbuf);
buf = ((cnt = vsnprintf(chbuf,size,fmt,ap)) < size)
? chbuf : malloc(cnt + 1);
va_end(ap);
if (buf == chbuf) {
(void)0;
} else if (buf) {
va_start(ap,fmt);
vsprintf(buf,fmt,ap);
va_end(ap);
} else {
return -1;
}
ret = 0;
ch = buf;
for (; cnt && ret>=0; ) {
ret = write(fd,ch,cnt);
while ((ret < 0) && (errno == EINTR))
ret = write(fd,ch,cnt);
ch += ret;
cnt -= ret;
}
ret = (ret < 0) ? -1 : ch - buf;
if (buf != chbuf)
free(buf);
return ret;
}
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