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- /*
- * libcompat - system compatibility library
- *
- * Copyright © 1995 Ian Jackson <ian@chiark.greenend.org.uk>
- * Copyright © 2008, 2009 Guillem Jover <guillem@debian.org>
- *
- * This 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,
- * or (at your option) any later version.
- *
- * This 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, see <http://www.gnu.org/licenses/>.
- */
- #include <config.h>
- #include <unistd.h>
- #include <stdarg.h>
- #include <stdio.h>
- #ifndef HAVE_VSNPRINTF
- int
- vsnprintf(char *buf, size_t maxsize, const char *fmt, va_list al)
- {
- static FILE *file = NULL;
- size_t want, nr;
- int total;
- if (maxsize != 0 && buf == NULL)
- return -1;
- if (!file) {
- file = tmpfile();
- if (!file)
- return -1;
- } else {
- if (fseek(file, 0, 0))
- return -1;
- if (ftruncate(fileno(file), 0))
- return -1;
- }
- total = vfprintf(file, fmt, al);
- if (total < 0)
- return -1;
- if (maxsize == 0)
- return total;
- if (total >= (int)maxsize)
- want = maxsize - 1;
- else
- want = total;
- if (fflush(file))
- return -1;
- if (fseek(file, 0, SEEK_SET))
- return -1;
- nr = fread(buf, 1, want, file);
- if (nr != want)
- return -1;
- buf[want] = '\0';
- return total;
- }
- #endif
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