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/* This file is part of GDBM, the GNU data base manager.
Copyright (C) 2011, 2013 Free Software Foundation, Inc.
GDBM 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 3, or (at your option)
any later version.
GDBM 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 GDBM. If not, see <http://www.gnu.org/licenses/>. */
# include "autoconf.h"
# include "gdbmdefs.h"
# include "gdbm.h"
# include <pwd.h>
# include <grp.h>
# include <time.h>
static int
print_datum (datum const *dat, unsigned char **bufptr,
size_t *bufsize, FILE *fp)
{
int rc;
size_t len;
unsigned char *p;
fprintf (fp, "#:len=%lu\n", (unsigned long) dat->dsize);
rc = _gdbm_base64_encode ((unsigned char*) dat->dptr, dat->dsize,
bufptr, bufsize, &len);
if (rc)
return rc;
p = *bufptr;
while (len)
{
size_t n = len;
if (n > _GDBM_MAX_DUMP_LINE_LEN)
n = _GDBM_MAX_DUMP_LINE_LEN;
if (fwrite (p, n, 1, fp) != 1)
return GDBM_FILE_WRITE_ERROR;
fputc ('\n', fp);
len -= n;
p += n;
}
return 0;
}
int
_gdbm_dump_ascii (GDBM_FILE dbf, FILE *fp)
{
time_t t;
int fd;
struct stat st;
struct passwd *pw;
struct group *gr;
datum key;
size_t count = 0;
unsigned char *buffer = NULL;
size_t bufsize = 0;
int rc;
fd = gdbm_fdesc (dbf);
if (fstat (fd, &st))
return GDBM_FILE_STAT_ERROR;
/* Print header */
time (&t);
fprintf (fp, "# GDBM dump file created by %s on %s",
gdbm_version, ctime (&t));
fprintf (fp, "#:version=1.0\n");
fprintf (fp, "#:file=%s\n", dbf->name);
fprintf (fp, "#:uid=%lu,", (unsigned long) st.st_uid);
pw = getpwuid (st.st_uid);
if (pw)
fprintf (fp, "user=%s,", pw->pw_name);
fprintf (fp, "gid=%lu,", (unsigned long) st.st_gid);
gr = getgrgid (st.st_gid);
if (gr)
fprintf (fp, "group=%s,", gr->gr_name);
fprintf (fp, "mode=%03o\n", st.st_mode & 0777);
fprintf (fp, "# End of header\n");
key = gdbm_firstkey (dbf);
while (key.dptr)
{
datum nextkey;
datum data = gdbm_fetch (dbf, key);
if (data.dptr)
{
if ((rc = print_datum (&key, &buffer, &bufsize, fp)) ||
(rc = print_datum (&data, &buffer, &bufsize, fp)))
{
free (key.dptr);
free (data.dptr);
gdbm_errno = rc;
break;
}
}
nextkey = gdbm_nextkey (dbf, key);
free (key.dptr);
free (data.dptr);
key = nextkey;
count++;
}
if (rc == 0)
{
/* FIXME: Something like that won't hurt, although load does not
use it currently. */
fprintf (fp, "#:count=%lu\n", (unsigned long) count);
fprintf (fp, "# End of data\n");
}
free (buffer);
return rc ? -1 : 0;
}
int
gdbm_dump_to_file (GDBM_FILE dbf, FILE *fp, int format)
{
int rc;
switch (format)
{
case GDBM_DUMP_FMT_BINARY:
rc = gdbm_export_to_file (dbf, fp) == -1;
break;
case GDBM_DUMP_FMT_ASCII:
rc = _gdbm_dump_ascii (dbf, fp);
break;
default:
return EINVAL;
}
if (rc == 0 && ferror (fp))
rc = gdbm_errno = GDBM_FILE_WRITE_ERROR;
return rc;
}
int
gdbm_dump (GDBM_FILE dbf, const char *filename, int fmt, int open_flags,
int mode)
{
int nfd, rc;
FILE *fp;
/* Only support GDBM_WCREAT or GDBM_NEWDB */
switch (open_flags)
{
case GDBM_WRCREAT:
nfd = open (filename, O_WRONLY | O_CREAT | O_EXCL, mode);
if (nfd == -1)
{
gdbm_errno = GDBM_FILE_OPEN_ERROR;
return -1;
}
break;
case GDBM_NEWDB:
nfd = open (filename, O_WRONLY | O_CREAT | O_TRUNC, mode);
if (nfd == -1)
{
gdbm_errno = GDBM_FILE_OPEN_ERROR;
return -1;
}
break;
default:
gdbm_errno = GDBM_BAD_OPEN_FLAGS;
return -1;
}
fp = fdopen (nfd, "w");
if (!fp)
{
close (nfd);
gdbm_errno = GDBM_FILE_OPEN_ERROR;
return -1;
}
rc = gdbm_dump_to_file (dbf, fp, fmt);
fclose (fp);
return rc;
}
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