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nginx/src/core/ngx_file.c
Igor Sysoev 05b1a8f1e3 ngx_str_set() and ngx_str_null()
2010-05-14 09:56:37 +00:00

992 lines
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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
static ngx_atomic_t temp_number = 0;
ngx_atomic_t *ngx_temp_number = &temp_number;
ngx_atomic_int_t ngx_random_number = 123456;
ssize_t
ngx_write_chain_to_temp_file(ngx_temp_file_t *tf, ngx_chain_t *chain)
{
ngx_int_t rc;
if (tf->file.fd == NGX_INVALID_FILE) {
rc = ngx_create_temp_file(&tf->file, tf->path, tf->pool,
tf->persistent, tf->clean, tf->access);
if (rc == NGX_ERROR || rc == NGX_AGAIN) {
return rc;
}
if (tf->log_level) {
ngx_log_error(tf->log_level, tf->file.log, 0, "%s %V",
tf->warn, &tf->file.name);
}
}
return ngx_write_chain_to_file(&tf->file, chain, tf->offset, tf->pool);
}
ngx_int_t
ngx_create_temp_file(ngx_file_t *file, ngx_path_t *path, ngx_pool_t *pool,
ngx_uint_t persistent, ngx_uint_t clean, ngx_uint_t access)
{
uint32_t n;
ngx_err_t err;
ngx_pool_cleanup_t *cln;
ngx_pool_cleanup_file_t *clnf;
file->name.len = path->name.len + 1 + path->len + 10;
file->name.data = ngx_pnalloc(pool, file->name.len + 1);
if (file->name.data == NULL) {
return NGX_ERROR;
}
#if 0
for (i = 0; i < file->name.len; i++) {
file->name.data[i] = 'X';
}
#endif
ngx_memcpy(file->name.data, path->name.data, path->name.len);
n = (uint32_t) ngx_next_temp_number(0);
cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t));
if (cln == NULL) {
return NGX_ERROR;
}
for ( ;; ) {
(void) ngx_sprintf(file->name.data + path->name.len + 1 + path->len,
"%010uD%Z", n);
ngx_create_hashed_filename(path, file->name.data, file->name.len);
ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
"hashed path: %s", file->name.data);
file->fd = ngx_open_tempfile(file->name.data, persistent, access);
ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
"temp fd:%d", file->fd);
if (file->fd != NGX_INVALID_FILE) {
cln->handler = clean ? ngx_pool_delete_file : ngx_pool_cleanup_file;
clnf = cln->data;
clnf->fd = file->fd;
clnf->name = file->name.data;
clnf->log = pool->log;
return NGX_OK;
}
err = ngx_errno;
if (err == NGX_EEXIST) {
n = (uint32_t) ngx_next_temp_number(1);
continue;
}
if ((path->level[0] == 0) || (err != NGX_ENOPATH)) {
ngx_log_error(NGX_LOG_CRIT, file->log, err,
ngx_open_tempfile_n " \"%s\" failed",
file->name.data);
return NGX_ERROR;
}
if (ngx_create_path(file, path) == NGX_ERROR) {
return NGX_ERROR;
}
}
}
void
ngx_create_hashed_filename(ngx_path_t *path, u_char *file, size_t len)
{
size_t i, level;
ngx_uint_t n;
i = path->name.len + 1;
file[path->name.len + path->len] = '/';
for (n = 0; n < 3; n++) {
level = path->level[n];
if (level == 0) {
break;
}
len -= level;
file[i - 1] = '/';
ngx_memcpy(&file[i], &file[len], level);
i += level + 1;
}
}
ngx_int_t
ngx_create_path(ngx_file_t *file, ngx_path_t *path)
{
size_t pos;
ngx_err_t err;
ngx_uint_t i;
pos = path->name.len;
for (i = 0; i < 3; i++) {
if (path->level[i] == 0) {
break;
}
pos += path->level[i] + 1;
file->name.data[pos] = '\0';
ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
"temp file: \"%s\"", file->name.data);
if (ngx_create_dir(file->name.data, 0700) == NGX_FILE_ERROR) {
err = ngx_errno;
if (err != NGX_EEXIST) {
ngx_log_error(NGX_LOG_CRIT, file->log, err,
ngx_create_dir_n " \"%s\" failed",
file->name.data);
return NGX_ERROR;
}
}
file->name.data[pos] = '/';
}
return NGX_OK;
}
ngx_err_t
ngx_create_full_path(u_char *dir, ngx_uint_t access)
{
u_char *p, ch;
ngx_err_t err;
err = 0;
#if (NGX_WIN32)
p = dir + 3;
#else
p = dir + 1;
#endif
for ( /* void */ ; *p; p++) {
ch = *p;
if (ch != '/') {
continue;
}
*p = '\0';
if (ngx_create_dir(dir, access) == NGX_FILE_ERROR) {
err = ngx_errno;
switch (err) {
case NGX_EEXIST:
err = 0;
case NGX_EACCES:
break;
default:
return err;
}
}
*p = '/';
}
return err;
}
ngx_atomic_uint_t
ngx_next_temp_number(ngx_uint_t collision)
{
ngx_atomic_uint_t n, add;
add = collision ? ngx_random_number : 1;
n = ngx_atomic_fetch_add(ngx_temp_number, add);
return n + add;
}
char *
ngx_conf_set_path_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
char *p = conf;
ssize_t level;
ngx_str_t *value;
ngx_uint_t i, n;
ngx_path_t *path, **slot;
slot = (ngx_path_t **) (p + cmd->offset);
if (*slot) {
return "is duplicate";
}
path = ngx_pcalloc(cf->pool, sizeof(ngx_path_t));
if (path == NULL) {
return NGX_CONF_ERROR;
}
value = cf->args->elts;
path->name = value[1];
if (path->name.data[path->name.len - 1] == '/') {
path->name.len--;
}
if (ngx_conf_full_name(cf->cycle, &path->name, 0) != NGX_OK) {
return NULL;
}
path->len = 0;
path->manager = NULL;
path->loader = NULL;
path->conf_file = cf->conf_file->file.name.data;
path->line = cf->conf_file->line;
for (i = 0, n = 2; n < cf->args->nelts; i++, n++) {
level = ngx_atoi(value[n].data, value[n].len);
if (level == NGX_ERROR || level == 0) {
return "invalid value";
}
path->level[i] = level;
path->len += level + 1;
}
while (i < 3) {
path->level[i++] = 0;
}
*slot = path;
if (ngx_add_path(cf, slot) == NGX_ERROR) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
char *
ngx_conf_merge_path_value(ngx_conf_t *cf, ngx_path_t **path, ngx_path_t *prev,
ngx_path_init_t *init)
{
if (*path) {
return NGX_CONF_OK;
}
if (prev) {
*path = prev;
return NGX_CONF_OK;
}
*path = ngx_palloc(cf->pool, sizeof(ngx_path_t));
if (*path == NULL) {
return NGX_CONF_ERROR;
}
(*path)->name = init->name;
if (ngx_conf_full_name(cf->cycle, &(*path)->name, 0) != NGX_OK) {
return NGX_CONF_ERROR;
}
(*path)->level[0] = init->level[0];
(*path)->level[1] = init->level[1];
(*path)->level[2] = init->level[2];
(*path)->len = init->level[0] + (init->level[0] ? 1 : 0)
+ init->level[1] + (init->level[1] ? 1 : 0)
+ init->level[2] + (init->level[2] ? 1 : 0);
(*path)->manager = NULL;
(*path)->loader = NULL;
(*path)->conf_file = NULL;
if (ngx_add_path(cf, path) != NGX_OK) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
char *
ngx_conf_set_access_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
char *confp = conf;
u_char *p;
ngx_str_t *value;
ngx_uint_t i, right, shift, *access;
access = (ngx_uint_t *) (confp + cmd->offset);
if (*access != NGX_CONF_UNSET_UINT) {
return "is duplicate";
}
value = cf->args->elts;
*access = 0600;
for (i = 1; i < cf->args->nelts; i++) {
p = value[i].data;
if (ngx_strncmp(p, "user:", sizeof("user:") - 1) == 0) {
shift = 6;
p += sizeof("user:") - 1;
} else if (ngx_strncmp(p, "group:", sizeof("group:") - 1) == 0) {
shift = 3;
p += sizeof("group:") - 1;
} else if (ngx_strncmp(p, "all:", sizeof("all:") - 1) == 0) {
shift = 0;
p += sizeof("all:") - 1;
} else {
goto invalid;
}
if (ngx_strcmp(p, "rw") == 0) {
right = 6;
} else if (ngx_strcmp(p, "r") == 0) {
right = 4;
} else {
goto invalid;
}
*access |= right << shift;
}
return NGX_CONF_OK;
invalid:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid value \"%V\"", &value[i]);
return NGX_CONF_ERROR;
}
ngx_int_t
ngx_add_path(ngx_conf_t *cf, ngx_path_t **slot)
{
ngx_uint_t i, n;
ngx_path_t *path, **p;
path = *slot;
p = cf->cycle->pathes.elts;
for (i = 0; i < cf->cycle->pathes.nelts; i++) {
if (p[i]->name.len == path->name.len
&& ngx_strcmp(p[i]->name.data, path->name.data) == 0)
{
for (n = 0; n < 3; n++) {
if (p[i]->level[n] != path->level[n]) {
if (path->conf_file == NULL) {
if (p[i]->conf_file == NULL) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"the default path name \"%V\" has "
"the same name as another default path, "
"but the different levels, you need to "
"redefine one of them in http section",
&p[i]->name);
return NGX_ERROR;
}
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"the path name \"%V\" in %s:%ui has "
"the same name as default path, but "
"the different levels, you need to "
"define default path in http section",
&p[i]->name, p[i]->conf_file, p[i]->line);
return NGX_ERROR;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"the same path name \"%V\" in %s:%ui "
"has the different levels than",
&p[i]->name, p[i]->conf_file, p[i]->line);
return NGX_ERROR;
}
if (p[i]->level[n] == 0) {
break;
}
}
*slot = p[i];
return NGX_OK;
}
}
p = ngx_array_push(&cf->cycle->pathes);
if (p == NULL) {
return NGX_ERROR;
}
*p = path;
return NGX_OK;
}
ngx_int_t
ngx_create_pathes(ngx_cycle_t *cycle, ngx_uid_t user)
{
ngx_err_t err;
ngx_uint_t i;
ngx_path_t **path;
path = cycle->pathes.elts;
for (i = 0; i < cycle->pathes.nelts; i++) {
if (ngx_create_dir(path[i]->name.data, 0700) == NGX_FILE_ERROR) {
err = ngx_errno;
if (err != NGX_EEXIST) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, err,
ngx_create_dir_n " \"%s\" failed",
path[i]->name.data);
return NGX_ERROR;
}
}
if (user == (ngx_uid_t) NGX_CONF_UNSET_UINT) {
continue;
}
#if !(NGX_WIN32)
{
ngx_file_info_t fi;
if (ngx_file_info((const char *) path[i]->name.data, &fi)
== NGX_FILE_ERROR)
{
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
ngx_file_info_n " \"%s\" failed", path[i]->name.data);
return NGX_ERROR;
}
if (fi.st_uid != user) {
if (chown((const char *) path[i]->name.data, user, -1) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"chown(\"%s\", %d) failed",
path[i]->name.data, user);
return NGX_ERROR;
}
}
if ((fi.st_mode & (S_IRUSR|S_IWUSR|S_IXUSR))
!= (S_IRUSR|S_IWUSR|S_IXUSR))
{
fi.st_mode |= (S_IRUSR|S_IWUSR|S_IXUSR);
if (chmod((const char *) path[i]->name.data, fi.st_mode) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"chmod() \"%s\" failed", path[i]->name.data);
return NGX_ERROR;
}
}
}
#endif
}
return NGX_OK;
}
ngx_int_t
ngx_ext_rename_file(ngx_str_t *src, ngx_str_t *to, ngx_ext_rename_file_t *ext)
{
u_char *name;
ngx_err_t err;
ngx_copy_file_t cf;
#if !(NGX_WIN32)
if (ext->access) {
if (ngx_change_file_access(src->data, ext->access) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ext->log, ngx_errno,
ngx_change_file_access_n " \"%s\" failed", src->data);
err = 0;
goto failed;
}
}
#endif
if (ext->time != -1) {
if (ngx_set_file_time(src->data, ext->fd, ext->time) != NGX_OK) {
ngx_log_error(NGX_LOG_CRIT, ext->log, ngx_errno,
ngx_set_file_time_n " \"%s\" failed", src->data);
err = 0;
goto failed;
}
}
if (ngx_rename_file(src->data, to->data) != NGX_FILE_ERROR) {
return NGX_OK;
}
err = ngx_errno;
if (err == NGX_ENOPATH) {
if (!ext->create_path) {
goto failed;
}
err = ngx_create_full_path(to->data, ngx_dir_access(ext->path_access));
if (err) {
ngx_log_error(NGX_LOG_CRIT, ext->log, err,
ngx_create_dir_n " \"%s\" failed", to->data);
err = 0;
goto failed;
}
if (ngx_rename_file(src->data, to->data) != NGX_FILE_ERROR) {
return NGX_OK;
}
err = ngx_errno;
}
#if (NGX_WIN32)
if (err == NGX_EEXIST) {
err = ngx_win32_rename_file(src, to, ext->log);
if (err == 0) {
return NGX_OK;
}
}
#endif
if (err == NGX_EXDEV) {
cf.size = -1;
cf.buf_size = 0;
cf.access = ext->access;
cf.time = ext->time;
cf.log = ext->log;
name = ngx_alloc(to->len + 1 + 10 + 1, ext->log);
if (name == NULL) {
return NGX_ERROR;
}
(void) ngx_sprintf(name, "%*s.%010uD%Z", to->len, to->data,
(uint32_t) ngx_next_temp_number(0));
if (ngx_copy_file(src->data, name, &cf) == NGX_OK) {
if (ngx_rename_file(name, to->data) != NGX_FILE_ERROR) {
ngx_free(name);
if (ngx_delete_file(src->data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ext->log, ngx_errno,
ngx_delete_file_n " \"%s\" failed",
src->data);
return NGX_ERROR;
}
return NGX_OK;
}
ngx_log_error(NGX_LOG_CRIT, ext->log, ngx_errno,
ngx_rename_file_n " \"%s\" to \"%s\" failed",
name, to->data);
if (ngx_delete_file(name) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ext->log, ngx_errno,
ngx_delete_file_n " \"%s\" failed", name);
}
}
ngx_free(name);
err = 0;
}
failed:
if (ext->delete_file) {
if (ngx_delete_file(src->data) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ext->log, ngx_errno,
ngx_delete_file_n " \"%s\" failed", src->data);
}
}
if (err) {
ngx_log_error(NGX_LOG_CRIT, ext->log, err,
ngx_rename_file_n " \"%s\" to \"%s\" failed",
src->data, to->data);
}
return NGX_ERROR;
}
ngx_int_t
ngx_copy_file(u_char *from, u_char *to, ngx_copy_file_t *cf)
{
char *buf;
off_t size;
size_t len;
ssize_t n;
ngx_fd_t fd, nfd;
ngx_int_t rc;
ngx_file_info_t fi;
rc = NGX_ERROR;
buf = NULL;
nfd = NGX_INVALID_FILE;
fd = ngx_open_file(from, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_CRIT, cf->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", from);
goto failed;
}
if (cf->size != -1) {
size = cf->size;
} else {
if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", from);
goto failed;
}
size = ngx_file_size(&fi);
}
len = cf->buf_size ? cf->buf_size : 65536;
if ((off_t) len > size) {
len = (size_t) size;
}
buf = ngx_alloc(len, cf->log);
if (buf == NULL) {
goto failed;
}
nfd = ngx_open_file(to, NGX_FILE_WRONLY, NGX_FILE_CREATE_OR_OPEN,
cf->access);
if (nfd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_CRIT, cf->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", to);
goto failed;
}
while (size > 0) {
if ((off_t) len > size) {
len = (size_t) size;
}
n = ngx_read_fd(fd, buf, len);
if (n == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_read_fd_n " \"%s\" failed", from);
goto failed;
}
if ((size_t) n != len) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_read_fd_n " has read only %z of %uz from %s",
n, size, from);
goto failed;
}
n = ngx_write_fd(nfd, buf, len);
if (n == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_write_fd_n " \"%s\" failed", to);
goto failed;
}
if ((size_t) n != len) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_write_fd_n " has written only %z of %uz to %s",
n, size, to);
goto failed;
}
size -= n;
}
if (cf->time != -1) {
if (ngx_set_file_time(to, nfd, cf->time) != NGX_OK) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_set_file_time_n " \"%s\" failed", to);
goto failed;
}
}
rc = NGX_OK;
failed:
if (nfd != NGX_INVALID_FILE) {
if (ngx_close_file(nfd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", to);
}
}
if (fd != NGX_INVALID_FILE) {
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", from);
}
}
if (buf) {
ngx_free(buf);
}
return rc;
}
/*
* ctx->init_handler() - see ctx->alloc
* ctx->file_handler() - file handler
* ctx->pre_tree_handler() - handler is called before entering directory
* ctx->post_tree_handler() - handler is called after leaving directory
* ctx->spec_handler() - special (socket, FIFO, etc.) file handler
*
* ctx->data - some data structure, it may be the same on all levels, or
* reallocated if ctx->alloc is nonzero
*
* ctx->alloc - a size of data structure that is allocated at every level
* and is initilialized by ctx->init_handler()
*
* ctx->log - a log
*
* on fatal (memory) error handler must return NGX_ABORT to stop walking tree
*/
ngx_int_t
ngx_walk_tree(ngx_tree_ctx_t *ctx, ngx_str_t *tree)
{
void *data, *prev;
u_char *p, *name;
size_t len;
ngx_int_t rc;
ngx_err_t err;
ngx_str_t file, buf;
ngx_dir_t dir;
ngx_str_null(&buf);
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"walk tree \"%V\"", tree);
if (ngx_open_dir(tree, &dir) == NGX_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_open_dir_n " \"%s\" failed", tree->data);
return NGX_ERROR;
}
prev = ctx->data;
if (ctx->alloc) {
data = ngx_alloc(ctx->alloc, ctx->log);
if (data == NULL) {
goto failed;
}
if (ctx->init_handler(data, prev) == NGX_ABORT) {
goto failed;
}
ctx->data = data;
} else {
data = NULL;
}
for ( ;; ) {
ngx_set_errno(0);
if (ngx_read_dir(&dir) == NGX_ERROR) {
err = ngx_errno;
if (err == NGX_ENOMOREFILES) {
rc = NGX_OK;
} else {
ngx_log_error(NGX_LOG_CRIT, ctx->log, err,
ngx_read_dir_n " \"%s\" failed", tree->data);
rc = NGX_ERROR;
}
goto done;
}
len = ngx_de_namelen(&dir);
name = ngx_de_name(&dir);
ngx_log_debug2(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"tree name %uz:\"%s\"", len, name);
if (len == 1 && name[0] == '.') {
continue;
}
if (len == 2 && name[0] == '.' && name[1] == '.') {
continue;
}
file.len = tree->len + 1 + len;
if (file.len + NGX_DIR_MASK_LEN > buf.len) {
if (buf.len) {
ngx_free(buf.data);
}
buf.len = tree->len + 1 + len + NGX_DIR_MASK_LEN;
buf.data = ngx_alloc(buf.len + 1, ctx->log);
if (buf.data == NULL) {
goto failed;
}
}
p = ngx_cpymem(buf.data, tree->data, tree->len);
*p++ = '/';
ngx_memcpy(p, name, len + 1);
file.data = buf.data;
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"tree path \"%s\"", file.data);
if (!dir.valid_info) {
if (ngx_de_info(file.data, &dir) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_de_info_n " \"%s\" failed", file.data);
continue;
}
}
if (ngx_de_is_file(&dir)) {
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"tree file \"%s\"", file.data);
ctx->size = ngx_de_size(&dir);
ctx->access = ngx_de_access(&dir);
ctx->mtime = ngx_de_mtime(&dir);
if (ctx->file_handler(ctx, &file) == NGX_ABORT) {
goto failed;
}
} else if (ngx_de_is_dir(&dir)) {
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"tree enter dir \"%s\"", file.data);
ctx->access = ngx_de_access(&dir);
ctx->mtime = ngx_de_mtime(&dir);
if (ctx->pre_tree_handler(ctx, &file) == NGX_ABORT) {
goto failed;
}
if (ngx_walk_tree(ctx, &file) == NGX_ABORT) {
goto failed;
}
ctx->access = ngx_de_access(&dir);
ctx->mtime = ngx_de_mtime(&dir);
if (ctx->post_tree_handler(ctx, &file) == NGX_ABORT) {
goto failed;
}
} else {
ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->log, 0,
"tree special \"%s\"", file.data);
if (ctx->spec_handler(ctx, &file) == NGX_ABORT) {
goto failed;
}
}
}
failed:
rc = NGX_ABORT;
done:
if (buf.len) {
ngx_free(buf.data);
}
if (data) {
ngx_free(data);
ctx->data = prev;
}
if (ngx_close_dir(&dir) == NGX_ERROR) {
ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
ngx_close_dir_n " \"%s\" failed", tree->data);
}
return rc;
}
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