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/*-
* Copyright (c) 2014-2017 MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "util.h"
static int copy(WT_SESSION *, const char *, const char *);
static int usage(void);
/*
* append_target --
* Build a list of comma-separated targets.
*/
static int
append_target(WT_SESSION *session, const char *target, char **bufp)
{
static bool first = true;
static size_t len = 0, remain = 0;
static char *buf = NULL;
/* 20 bytes of slop */
if (buf == NULL || remain < strlen(target) + 20) {
len += strlen(target) + 512;
remain += strlen(target) + 512;
if ((buf = realloc(buf, len)) == NULL)
return (util_err(session, errno, NULL));
*bufp = buf;
}
if (first) {
first = false;
strcpy(buf, "target=(");
} else
buf[strlen(buf) - 1] = ','; /* overwrite previous ")" */
strcat(buf, "\"");
strcat(buf, target);
strcat(buf, "\")");
remain -= strlen(target) + 1;
return (0);
}
int
util_backup(WT_SESSION *session, int argc, char *argv[])
{
WT_CURSOR *cursor;
WT_DECL_RET;
int ch;
char *config;
const char *directory, *name;
config = NULL;
while ((ch = __wt_getopt(progname, argc, argv, "t:")) != EOF)
switch (ch) {
case 't':
if (append_target(session, __wt_optarg, &config))
return (1);
break;
case '?':
default:
return (usage());
}
argc -= __wt_optind;
argv += __wt_optind;
if (argc != 1) {
(void)usage();
goto err;
}
directory = *argv;
if ((ret = session->open_cursor(
session, "backup:", NULL, config, &cursor)) != 0) {
fprintf(stderr, "%s: cursor open(backup:) failed: %s\n",
progname, session->strerror(session, ret));
goto err;
}
/* Copy the files. */
while (
(ret = cursor->next(cursor)) == 0 &&
(ret = cursor->get_key(cursor, &name)) == 0)
if ((ret = copy(session, directory, name)) != 0)
goto err;
if (ret == WT_NOTFOUND)
ret = 0;
if (ret != 0) {
fprintf(stderr, "%s: cursor next(backup:) failed: %s\n",
progname, session->strerror(session, ret));
goto err;
}
err: free(config);
return (ret);
}
static int
copy(WT_SESSION *session, const char *directory, const char *name)
{
WT_DECL_RET;
size_t len;
char *to;
to = NULL;
/* Build the target pathname. */
len = strlen(directory) + strlen(name) + 2;
if ((to = malloc(len)) == NULL) {
fprintf(stderr, "%s: %s\n", progname, strerror(errno));
return (1);
}
if ((ret = __wt_snprintf(to, len, "%s/%s", directory, name)) != 0) {
fprintf(stderr, "%s: %s\n", progname, strerror(ret));
goto err;
}
if (verbose && printf("Backing up %s/%s to %s\n", home, name, to) < 0) {
fprintf(stderr, "%s: %s\n", progname, strerror(EIO));
goto err;
}
/*
* Use WiredTiger to copy the file: ensuring stability of the copied
* file on disk requires care, and WiredTiger knows how to do it.
*/
if ((ret = __wt_copy_and_sync(session, name, to)) != 0)
fprintf(stderr, "%s/%s to %s: backup copy: %s\n",
home, name, to, session->strerror(session, ret));
err: free(to);
return (ret);
}
static int
usage(void)
{
(void)fprintf(stderr,
"usage: %s %s "
"backup [-t uri] directory\n",
progname, usage_prefix);
return (1);
}
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