//!
//! Function description.
//!
//! @param[in] file
//! @param[in] file_updated
//!
//! @return
//!
//! @see
//!
//! @pre List of pre-conditions
//!
//! @post List of post conditions
//!
//! @note
//!
int atomic_file_get(atomic_file * file, int *file_updated)
{
int port = 0;
int fd = 0;
int ret = 0;
int rc = 0;
char *hash = NULL;
char type[32] = "";
char hostname[512] = "";
char path[MAX_PATH] = "";
char tmpsource[MAX_PATH] = "";
char tmppath[MAX_PATH] = "";
if (!file || !file_updated) {
return (1);
}
ret = 0;
*file_updated = 0;
snprintf(file->tmpfile, MAX_PATH, "%s", file->tmpfilebase);
fd = safe_mkstemp(file->tmpfile);
if (fd < 0) {
LOGERROR("cannot open tmpfile '%s'\n", file->tmpfile);
return (1);
}
chmod(file->tmpfile, 0644);
close(fd);
snprintf(tmpsource, MAX_PATH, "%s", file->source);
type[0] = tmppath[0] = path[0] = hostname[0] = '\0';
port = 0;
tokenize_uri(tmpsource, type, hostname, &port, tmppath);
snprintf(path, MAX_PATH, "/%s", tmppath);
if (!strcmp(type, "http")) {
rc = http_get_timeout(file->source, file->tmpfile, 0, 0, 10, 15);
if (rc) {
LOGERROR("http client failed to fetch file URL=%s\n", file->source);
ret = 1;
}
} else if (!strcmp(type, "file")) {
if (!strlen(path) || copy_file(path, file->tmpfile)) {
LOGERROR("could not copy source file (%s) to dest file (%s)\n", path, file->tmpfile);
ret = 1;
}
} else {
LOGWARN("BUG: incompatible URI type (only support http, file): (%s)\n", type);
ret = 1;
}
if (!ret) {
if (file->tosort) {
rc = atomic_file_sort_tmpfile(file);
if (rc) {
LOGWARN("could not sort tmpfile (%s) inplace\n", file->tmpfile);
}
}
// do checksum - only copy if file has changed
hash = file2md5str(file->tmpfile);
if (!hash) {
LOGERROR("could not compute hash of tmpfile (%s)\n", file->tmpfile);
ret = 1;
} else {
if (file->currhash)
EUCA_FREE(file->currhash);
file->currhash = hash;
if (check_file(file->dest) || strcmp(file->currhash, file->lasthash)) {
// hashes are different, put new file in place
LOGINFO("source and destination file contents have changed, triggering update of dest (%s)\n", file->dest);
LOGDEBUG("renaming file %s -> %s\n", file->tmpfile, file->dest);
if (rename(file->tmpfile, file->dest)) {
LOGERROR("could not rename local copy to dest (%s -> %s)\n", file->tmpfile, file->dest);
ret = 1;
} else {
EUCA_FREE(file->lasthash);
file->lasthash = strdup(file->currhash);
*file_updated = 1;
}
}
}
}
unlink(file->tmpfile);
return (ret);
}
//!
//! Function description.
//!
//! @param[in] file
//! @param[in] file_updated
//!
//! @return
//!
//! @see
//!
//! @pre List of pre-conditions
//!
//! @post List of post conditions
//!
//! @note
//!
int atomic_file_get(atomic_file * file, boolean * file_updated)
{
int port = 0;
int fd = 0;
int ret = 0;
int rc = 0;
char *hash = NULL;
char type[32] = "";
char hostname[512] = "";
char path[EUCA_MAX_PATH] = "";
char tmpsource[EUCA_MAX_PATH] = "";
char tmppath[EUCA_MAX_PATH] = "";
if (!file || !file_updated) {
return (1);
}
ret = 0;
*file_updated = FALSE;
snprintf(file->tmpfile, EUCA_MAX_PATH, "%s", file->tmpfilebase);
fd = safe_mkstemp(file->tmpfile);
if (fd < 0) {
LOGERROR("cannot open tmpfile '%s': check permissions\n", file->tmpfile);
return (1);
}
if (chmod(file->tmpfile, 0600)) {
LOGWARN("chmod failed: was able to create tmpfile '%s', but could not change file permissions\n", file->tmpfile);
}
close(fd);
snprintf(tmpsource, EUCA_MAX_PATH, "%s", file->source);
type[0] = tmppath[0] = path[0] = hostname[0] = '\0';
port = 0;
tokenize_uri(tmpsource, type, hostname, &port, tmppath);
snprintf(path, EUCA_MAX_PATH, "/%s", tmppath);
if (!strcmp(type, "http")) {
rc = http_get_timeout(file->source, file->tmpfile, 0, 0, 10, 15, NULL);
if (rc) {
LOGERROR("http client failed to fetch file URL=%s: check http server status\n", file->source);
ret = 1;
}
} else if (!strcmp(type, "file")) {
if (!strlen(path) || copy_file(path, file->tmpfile)) {
LOGERROR("could not copy source file (%s) to dest file (%s): check permissions\n", path, file->tmpfile);
ret = 1;
}
} else {
LOGWARN("BUG: incompatible URI type (%s) passed to routine (only supports http, file)\n", type);
ret = 1;
}
if (!ret) {
if (file->dosort) {
rc = atomic_file_sort_tmpfile(file);
if (rc) {
LOGWARN("could not sort tmpfile (%s) inplace: continuing without sort\n", file->tmpfile);
}
}
// do checksum - only copy if file has changed
hash = file2md5str(file->tmpfile);
if (!hash) {
LOGERROR("could not compute hash of tmpfile (%s): check permissions\n", file->tmpfile);
ret = 1;
} else {
if (file->currhash)
EUCA_FREE(file->currhash);
file->currhash = hash;
if (check_file(file->dest) || strcmp(file->currhash, file->lasthash)) {
// hashes are different, put new file in place
LOGDEBUG("update triggered due to file update (%s)\n", file->dest);
LOGDEBUG("source and destination file contents have become different, triggering update of dest (%s)\n", file->dest);
LOGDEBUG("renaming file %s -> %s\n", file->tmpfile, file->dest);
if (rename(file->tmpfile, file->dest)) {
LOGERROR("could not rename (move) source file '%s' to dest file '%s': check permissions\n", file->tmpfile, file->dest);
ret = 1;
} else {
EUCA_FREE(file->lasthash);
file->lasthash = strdup(file->currhash);
*file_updated = TRUE;
}
}
}
}
unlink(file->tmpfile);
return (ret);
}
