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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
ngx_int_t ngx_collect_garbage(ngx_gc_t *ctx, ngx_str_t *dname, ngx_int_t level)
{
int rc;
u_char *last;
size_t len;
ngx_err_t err;
ngx_str_t fname, buf;
ngx_dir_t dir;
buf.len = 0;
#if (NGX_SUPPRESS_WARN)
buf.data = NULL;
fname.data = NULL;
#endif
ngx_log_debug2(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"gc dir \"%s\":%d", dname->data, dname->len);
if (ngx_open_dir(dname, &dir) == NGX_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_open_dir_n " \"%s\" failed", dname->data);
return NGX_ERROR;
}
for ( ;; ) {
ngx_set_errno(0);
if (ngx_read_dir(&dir) == NGX_ERROR) {
err = ngx_errno;
if (err != NGX_ENOMOREFILES) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, err,
ngx_read_dir_n " \"%s\" failed", dname->data);
rc = NGX_ERROR;
} else {
rc = NGX_OK;
}
break;
}
len = ngx_de_namelen(&dir);
ngx_log_debug2(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"gc name \"%s\":%d", ngx_de_name(&dir), len);
if (len == 1 && ngx_de_name(&dir)[0] == '.') {
continue;
}
if (len == 2
&& ngx_de_name(&dir)[0] == '.'
&& ngx_de_name(&dir)[1] == '.')
{
continue;
}
fname.len = dname->len + 1+ len;
if (fname.len + NGX_DIR_MASK_LEN > buf.len) {
if (buf.len) {
ngx_free(buf.data);
}
buf.len = dname->len + 1 + len + NGX_DIR_MASK_LEN;
buf.data = ngx_alloc(buf.len + 1, ctx->log);
if (buf.data == NULL) {
return NGX_ABORT;
}
}
last = ngx_cpymem(buf.data, dname->data, dname->len);
*last++ = '/';
ngx_memcpy(last, ngx_de_name(&dir), len + 1);
fname.data = buf.data;
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"gc path: \"%s\"", fname.data);
if (!dir.valid_info) {
if (ngx_de_info(fname.data, &dir) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_de_info_n " \"%s\" failed", fname.data);
continue;
}
}
if (ngx_de_is_dir(&dir)) {
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"gc enter dir \"%s\"", fname.data);
if (level == -1
/* there can not be directory on the last level */
|| level == NGX_MAX_PATH_LEVEL
/* an directory from the old path hierarchy */
|| len != ctx->path->level[level])
{
if (ngx_collect_garbage(ctx, &fname, -1) == NGX_ABORT) {
return NGX_ABORT;
}
fname.data[fname.len] = '\0';
ngx_log_error(NGX_LOG_NOTICE, ctx->log, 0,
"delete old hierachy directory \"%s\"",
fname.data);
if (ngx_delete_dir(fname.data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_delete_dir_n " \"%s\" failed",
fname.data);
} else {
ctx->deleted++;
ctx->freed += ngx_de_size(&dir);
}
continue;
}
if (ngx_collect_garbage(ctx, &fname, level + 1) == NGX_ABORT) {
return NGX_ABORT;
}
} else if (ngx_de_is_file(&dir)) {
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"gc file \"%s\"", fname.data);
if (level == -1
|| (level < NGX_MAX_PATH_LEVEL && ctx->path->level[level] != 0))
{
if (ngx_delete_file(fname.data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_delete_file_n " \"%s\" failed",
fname.data);
} else {
ctx->deleted++;
ctx->freed += ngx_de_size(&dir);
}
continue;
}
if (ctx->handler(ctx, &fname, &dir) == NGX_ABORT) {
return NGX_ABORT;
}
} else {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
"the file \"%s\" has unknown type, deleting",
fname.data);
if (ngx_delete_file(fname.data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_delete_file_n " \"%s\" failed", fname.data);
} else {
ctx->deleted++;
ctx->freed += ngx_de_size(&dir);
}
}
}
if (buf.len) {
ngx_free(buf.data);
}
if (ngx_close_dir(&dir) == NGX_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_close_dir_n " \"%s\" failed", fname.data);
}
return rc;
}
ngx_int_t ngx_garbage_collector_temp_handler(ngx_gc_t *ctx, ngx_str_t *name,
ngx_dir_t *dir)
{
/*
* We use mtime only and do not use atime because:
* on NTFS access time has a resolution of 1 hour,
* on NT FAT access time has a resolution of 1 day,
* Unices have the mount option "noatime".
*/
if (ngx_time() - ngx_de_mtime(dir) < 3600) {
return NGX_OK;
}
ngx_log_error(NGX_LOG_NOTICE, ctx->log, 0,
"delete the stale temporary file \"%s\"", name->data);
if (ngx_delete_file(name->data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_delete_file_n " \"%s\" failed", name->data);
return NGX_ERROR;
}
ctx->deleted++;
ctx->freed += ngx_de_size(dir);
return NGX_OK;
}
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