diff options
Diffstat (limited to 'src/mod_userdir.c')
| -rw-r--r-- | src/mod_userdir.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/src/mod_userdir.c b/src/mod_userdir.c new file mode 100644 index 00000000..d098fbc2 --- /dev/null +++ b/src/mod_userdir.c @@ -0,0 +1,248 @@ +#include <sys/types.h> + +#include <stdlib.h> +#include <string.h> + +#include "base.h" +#include "log.h" +#include "buffer.h" + +#include "response.h" + +#include "plugin.h" + +#include "config.h" + +#ifdef HAVE_PWD_H +#include <pwd.h> +#endif + +/* plugin config for all request/connections */ +typedef struct { + array *exclude_user; + array *include_user; + buffer *path; +} plugin_config; + +typedef struct { + PLUGIN_DATA; + + buffer *username; + + plugin_config **config_storage; + + plugin_config conf; +} plugin_data; + +/* init the plugin data */ +INIT_FUNC(mod_userdir_init) { + plugin_data *p; + + p = calloc(1, sizeof(*p)); + + p->username = buffer_init(); + + return p; +} + +/* detroy the plugin data */ +FREE_FUNC(mod_userdir_free) { + plugin_data *p = p_d; + + if (!p) return HANDLER_GO_ON; + + if (p->config_storage) { + size_t i; + + for (i = 0; i < srv->config_context->used; i++) { + plugin_config *s = p->config_storage[i]; + + array_free(s->include_user); + array_free(s->exclude_user); + buffer_free(s->path); + + free(s); + } + free(p->config_storage); + } + + buffer_free(p->username); + + free(p); + + return HANDLER_GO_ON; +} + +/* handle plugin config and check values */ + +SETDEFAULTS_FUNC(mod_userdir_set_defaults) { + plugin_data *p = p_d; + size_t i; + + config_values_t cv[] = { + { "userdir.path", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 0 */ + { "userdir.exclude-user", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 1 */ + { "userdir.include-user", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 2 */ + { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET } + }; + + if (!p) return HANDLER_ERROR; + + p->config_storage = malloc(srv->config_context->used * sizeof(specific_config *)); + + for (i = 0; i < srv->config_context->used; i++) { + plugin_config *s; + + s = malloc(sizeof(plugin_config)); + s->exclude_user = array_init(); + s->include_user = array_init(); + s->path = buffer_init(); + + cv[0].destination = s->path; + cv[1].destination = s->exclude_user; + cv[2].destination = s->include_user; + + p->config_storage[i] = s; + + if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) { + return HANDLER_ERROR; + } + } + + return HANDLER_GO_ON; +} + +#define PATCH(x) \ + p->conf.x = s->x; +static int mod_userdir_patch_connection(server *srv, connection *con, plugin_data *p, const char *stage, size_t stage_len) { + size_t i, j; + + /* skip the first, the global context */ + for (i = 1; i < srv->config_context->used; i++) { + data_config *dc = (data_config *)srv->config_context->data[i]; + plugin_config *s = p->config_storage[i]; + + /* not our stage */ + if (!buffer_is_equal_string(dc->comp_key, stage, stage_len)) continue; + + /* condition didn't match */ + if (!config_check_cond(srv, con, dc)) continue; + + /* merge config */ + for (j = 0; j < dc->value->used; j++) { + data_unset *du = dc->value->data[j]; + + if (buffer_is_equal_string(du->key, CONST_STR_LEN("userdir.path"))) { + PATCH(path); + } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("userdir.exclude-user"))) { + PATCH(exclude_user); + } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("userdir.include-user"))) { + PATCH(include_user); + } + } + } + + return 0; +} + +static int mod_userdir_setup_connection(server *srv, connection *con, plugin_data *p) { + plugin_config *s = p->config_storage[0]; + UNUSED(srv); + UNUSED(con); + + PATCH(path); + PATCH(exclude_user); + PATCH(include_user); + + return 0; +} +#undef PATCH + +URIHANDLER_FUNC(mod_userdir_docroot_handler) { + plugin_data *p = p_d; + int uri_len; + size_t k; + char *rel_url; + struct passwd *pwd; + size_t i; + + if (con->uri.path->used == 0) return HANDLER_GO_ON; +#ifdef HAVE_PWD_H + mod_userdir_setup_connection(srv, con, p); + for (i = 0; i < srv->config_patches->used; i++) { + buffer *patch = srv->config_patches->ptr[i]; + + mod_userdir_patch_connection(srv, con, p, CONST_BUF_LEN(patch)); + } + + uri_len = con->uri.path->used - 1; + + /* /~user/foo.html -> /home/user/public_html/foo.html */ + + if (con->uri.path->ptr[0] != '/' || + con->uri.path->ptr[1] != '~') return HANDLER_GO_ON; + + if (NULL == (rel_url = strchr(con->uri.path->ptr + 2, '/'))) { + /* / is missing -> redirect to .../ as we are a user - DIRECTORY ! :) */ + http_response_redirect_to_directory(srv, con); + + return HANDLER_FINISHED; + } + buffer_copy_string_len(p->username, con->uri.path->ptr + 2, rel_url - (con->uri.path->ptr + 2)); + + if (NULL == (pwd = getpwnam(p->username->ptr))) { + /* user not found */ + return HANDLER_GO_ON; + } + + for (k = 0; k < p->conf.exclude_user->used; k++) { + data_string *ds = (data_string *)p->conf.exclude_user->data[k]; + + if (buffer_is_equal(ds->value, p->username)) { + /* user in exclude list */ + return HANDLER_GO_ON; + } + } + + if (p->conf.include_user->used) { + int found_user = 0; + for (k = 0; k < p->conf.include_user->used; k++) { + data_string *ds = (data_string *)p->conf.include_user->data[k]; + + if (buffer_is_equal(ds->value, p->username)) { + /* user in exclude list */ + found_user = 1; + break; + } + } + + if (!found_user) return HANDLER_GO_ON; + } + + buffer_copy_string(con->physical.path, pwd->pw_dir); + BUFFER_APPEND_SLASH(con->physical.path); + buffer_append_string_buffer(con->physical.path, p->conf.path); /* skip the / */ + BUFFER_APPEND_SLASH(con->physical.path); + buffer_append_string(con->physical.path, rel_url + 1); /* skip the / */ + + return HANDLER_GO_ON; +#else + return HANDLER_ERROR; +#endif +} + +/* this function is called at dlopen() time and inits the callbacks */ + +int mod_userdir_plugin_init(plugin *p) { + p->version = LIGHTTPD_VERSION_ID; + p->name = buffer_init_string("userdir"); + + p->init = mod_userdir_init; + p->handle_docroot = mod_userdir_docroot_handler; + p->set_defaults = mod_userdir_set_defaults; + p->cleanup = mod_userdir_free; + + p->data = NULL; + + return 0; +} |