#include "lib.h"
#include "array.h"
#include "buffer.h"
#include "str.h"
#include "str-sanitize.h"
#include "istream.h"
#include "ostream.h"
#include "safe-mkstemp.h"
#include "mail-user.h"
#include "sieve-common.h"
#include "sieve-stringlist.h"
#include "sieve-binary.h"
#include "sieve-code.h"
#include "sieve-message.h"
#include "sieve-extensions.h"
#include "sieve-commands.h"
#include "sieve-actions.h"
#include "sieve-validator.h"
#include "sieve-generator.h"
#include "sieve-interpreter.h"
#include "sieve-dump.h"
#include "sieve-result.h"
#include "sieve-ext-variables.h"
#include "sieve-extprograms-common.h"
static bool cmd_filter_generate
(const struct sieve_codegen_env *cgenv,
struct sieve_command *ctx);
const struct sieve_command_def cmd_filter = {
"filter",
SCT_HYBRID,
-1,
0, FALSE, FALSE,
NULL, NULL,
sieve_extprogram_command_validate,
NULL,
cmd_filter_generate,
NULL,
};
static bool cmd_filter_operation_dump
(const struct sieve_dumptime_env *denv, sieve_size_t *address);
static int cmd_filter_operation_execute
(const struct sieve_runtime_env *renv, sieve_size_t *address);
const struct sieve_operation_def cmd_filter_operation = {
"FILTER", &filter_extension,
0,
cmd_filter_operation_dump,
cmd_filter_operation_execute
};
static bool cmd_filter_generate
(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd)
{
sieve_operation_emit(cgenv->sblock, cmd->ext, &cmd_filter_operation);
sieve_binary_emit_byte(cgenv->sblock, ( cmd->ast_node->type == SAT_TEST ));
if ( !sieve_generate_arguments(cgenv, cmd, NULL) )
return FALSE;
if ( sieve_ast_argument_next(cmd->first_positional) == NULL )
sieve_opr_omitted_emit(cgenv->sblock);
return TRUE;
}
static bool cmd_filter_operation_dump
(const struct sieve_dumptime_env *denv, sieve_size_t *address)
{
unsigned int is_test = 0;
if ( !sieve_binary_read_byte(denv->sblock, address, &is_test) )
return FALSE;
sieve_code_dumpf(denv, "FILTER (%s)", (is_test ? "test" : "command"));
sieve_code_descend(denv);
if ( sieve_action_opr_optional_dump(denv, address, NULL) != 0 )
return FALSE;
if ( !sieve_opr_string_dump(denv, address, "program-name") )
return FALSE;
return sieve_opr_stringlist_dump_ex(denv, address, "arguments", "");
}
static int cmd_filter_get_tempfile
(const struct sieve_runtime_env *renv)
{
struct sieve_instance *svinst = renv->svinst;
struct mail_user *mail_user = renv->scriptenv->user;
string_t *path;
int fd;
path = t_str_new(128);
mail_user_set_get_temp_prefix(path, mail_user->set);
fd = safe_mkstemp(path, 0600, (uid_t)-1, (gid_t)-1);
if (fd == -1) {
sieve_sys_error(svinst, "filter action: "
"safe_mkstemp(%s) failed: %m", str_c(path));
return -1;
}
if (unlink(str_c(path)) < 0) {
sieve_sys_error(svinst, "filter action: "
"unlink(%s) failed: %m", str_c(path));
if ( close(fd) < 0 ) {
sieve_sys_error(svinst, "filter action: "
"close(%s) failed after error: %m", str_c(path));
}
return -1;
}
return fd;
}
static int cmd_filter_operation_execute
(const struct sieve_runtime_env *renv, sieve_size_t *address)
{
const struct sieve_extension *this_ext = renv->oprtn->ext;
unsigned int is_test = 0;
struct sieve_stringlist *args_list = NULL;
enum sieve_error error = SIEVE_ERROR_NONE;
string_t *pname = NULL;
const char *program_name = NULL;
const char *const *args = NULL;
int tmp_fd = -1;
int ret;
if ( !sieve_binary_read_byte(renv->sblock, address, &is_test) ) {
sieve_runtime_trace_error(renv, "invalid is_test flag");
return SIEVE_EXEC_BIN_CORRUPT;
}
if ( sieve_action_opr_optional_read(renv, address, NULL, &ret, NULL) != 0 )
return ret;
if ( (ret=sieve_extprogram_command_read_operands
(renv, address, &pname, &args_list)) <= 0 )
return ret;
program_name = str_c(pname);
if ( args_list != NULL &&
sieve_stringlist_read_all(args_list, pool_datastack_create(), &args) < 0 ) {
sieve_runtime_trace_error(renv, "failed to read args operand");
return args_list->exec_status;
}
sieve_runtime_trace(renv, SIEVE_TRLVL_ACTIONS, "filter action");
sieve_runtime_trace_descend(renv);
sieve_runtime_trace(renv, SIEVE_TRLVL_ACTIONS,
"execute program `%s'", str_sanitize(program_name, 128));
ret = 1;
if ( (tmp_fd=cmd_filter_get_tempfile(renv)) < 0 ) {
ret = -1;
}
if ( ret > 0 ) {
struct sieve_extprogram *sprog = sieve_extprogram_create
(this_ext, renv->scriptenv, renv->msgdata, "filter", program_name, args,
&error);
if ( sprog != NULL && sieve_extprogram_set_input_mail
(sprog, sieve_message_get_mail(renv->msgctx)) >= 0 ) {
struct ostream *outdata =
o_stream_create_fd(tmp_fd, 0, FALSE);
sieve_extprogram_set_output(sprog, outdata);
o_stream_unref(&outdata);
ret = sieve_extprogram_run(sprog);
} else {
ret = -1;
}
if ( sprog != NULL )
sieve_extprogram_destroy(&sprog);
}
if ( ret > 0 ) {
struct istream *newmsg;
sieve_runtime_trace(renv, SIEVE_TRLVL_ACTIONS,
"executed program successfully");
newmsg = i_stream_create_fd(tmp_fd, (size_t)-1, TRUE);
if ( (ret=sieve_message_substitute(renv->msgctx, newmsg)) >= 0 ) {
sieve_runtime_trace(renv, SIEVE_TRLVL_ACTIONS,
"changed message");
} else {
sieve_runtime_critical(renv, NULL, "filter action",
"filter action: failed to substitute message");
}
i_stream_unref(&newmsg);
} else {
if ( tmp_fd >= 0 ) {
if ( close(tmp_fd) < 0 ) {
sieve_sys_error
(renv->svinst, "filter action: close(temp_file) failed: %m");
}
}
if ( ret < 0 ) {
if ( error == SIEVE_ERROR_NOT_FOUND ) {
sieve_runtime_error(renv, NULL,
"filter action: program `%s' not found",
str_sanitize(program_name, 80));
} else {
sieve_extprogram_exec_error(renv->ehandler,
sieve_runtime_get_full_command_location(renv),
"filter action: failed to execute to program `%s'",
str_sanitize(program_name, 80));
}
} else {
sieve_runtime_trace(renv, SIEVE_TRLVL_ACTIONS,
"filter action: program indicated false result");
}
}
if ( is_test )
sieve_interpreter_set_test_result(renv->interp, ( ret > 0 ));
return SIEVE_EXEC_OK;
}