-/* $Cambridge: exim/src/src/transports/pipe.c,v 1.5 2005/05/03 14:20:01 ph10 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2005 */
+/* Copyright (c) The Exim maintainers 2020 - 2022 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
#include "../exim.h"
#include "pipe.h"
+#ifdef HAVE_SETCLASSRESOURCES
+#include <login_cap.h>
+#endif
+
/* Options specific to the pipe transport. They must be in alphabetic
software for alternative value types. Some options are stored in the transport
instance block so as to be publicly visible; these are flagged with opt_public.
*/
+#define LOFF(field) OPT_OFF(pipe_transport_options_block, field)
optionlist pipe_transport_options[] = {
- { "allow_commands", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, allow_commands) },
+ { "allow_commands", opt_stringptr, LOFF(allow_commands) },
{ "batch_id", opt_stringptr | opt_public,
- (void *)offsetof(transport_instance, batch_id) },
+ OPT_OFF(transport_instance, batch_id) },
{ "batch_max", opt_int | opt_public,
- (void *)offsetof(transport_instance, batch_max) },
- { "check_string", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, check_string) },
- { "command", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, cmd) },
- { "environment", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, environment) },
- { "escape_string", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, escape_string) },
- { "freeze_exec_fail", opt_bool,
- (void *)offsetof(pipe_transport_options_block, freeze_exec_fail) },
- { "ignore_status", opt_bool,
- (void *)offsetof(pipe_transport_options_block, ignore_status) },
+ OPT_OFF(transport_instance, batch_max) },
+ { "check_string", opt_stringptr, LOFF(check_string) },
+ { "command", opt_stringptr, LOFF(cmd) },
+ { "environment", opt_stringptr, LOFF(environment) },
+ { "escape_string", opt_stringptr, LOFF(escape_string) },
+ { "force_command", opt_bool, LOFF(force_command) },
+ { "freeze_exec_fail", opt_bool, LOFF(freeze_exec_fail) },
+ { "freeze_signal", opt_bool, LOFF(freeze_signal) },
+ { "ignore_status", opt_bool, LOFF(ignore_status) },
{ "log_defer_output", opt_bool | opt_public,
- (void *)offsetof(transport_instance, log_defer_output) },
+ OPT_OFF(transport_instance, log_defer_output) },
{ "log_fail_output", opt_bool | opt_public,
- (void *)offsetof(transport_instance, log_fail_output) },
+ OPT_OFF(transport_instance, log_fail_output) },
{ "log_output", opt_bool | opt_public,
- (void *)offsetof(transport_instance, log_output) },
- { "max_output", opt_mkint,
- (void *)offsetof(pipe_transport_options_block, max_output) },
- { "message_prefix", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, message_prefix) },
- { "message_suffix", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, message_suffix) },
- { "path", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, path) },
+ OPT_OFF(transport_instance, log_output) },
+ { "max_output", opt_mkint, LOFF(max_output) },
+ { "message_prefix", opt_stringptr, LOFF(message_prefix) },
+ { "message_suffix", opt_stringptr, LOFF(message_suffix) },
+ { "path", opt_stringptr, LOFF(path) },
+ { "permit_coredump", opt_bool, LOFF(permit_coredump) },
{ "pipe_as_creator", opt_bool | opt_public,
- (void *)offsetof(transport_instance, deliver_as_creator) },
- { "restrict_to_path", opt_bool,
- (void *)offsetof(pipe_transport_options_block, restrict_to_path) },
+ OPT_OFF(transport_instance, deliver_as_creator) },
+ { "restrict_to_path", opt_bool, LOFF(restrict_to_path) },
{ "return_fail_output",opt_bool | opt_public,
- (void *)offsetof(transport_instance, return_fail_output) },
+ OPT_OFF(transport_instance, return_fail_output) },
{ "return_output", opt_bool | opt_public,
- (void *)offsetof(transport_instance, return_output) },
- { "temp_errors", opt_stringptr,
- (void *)offsetof(pipe_transport_options_block, temp_errors) },
- { "timeout", opt_time,
- (void *)offsetof(pipe_transport_options_block, timeout) },
- { "timeout_defer", opt_bool,
- (void *)offsetof(pipe_transport_options_block, timeout_defer) },
- { "umask", opt_octint,
- (void *)offsetof(pipe_transport_options_block, umask) },
- { "use_bsmtp", opt_bool,
- (void *)offsetof(pipe_transport_options_block, use_bsmtp) },
- { "use_crlf", opt_bool,
- (void *)offsetof(pipe_transport_options_block, use_crlf) },
- { "use_shell", opt_bool,
- (void *)offsetof(pipe_transport_options_block, use_shell) },
+ OPT_OFF(transport_instance, return_output) },
+ { "temp_errors", opt_stringptr, LOFF(temp_errors) },
+ { "timeout", opt_time, LOFF(timeout) },
+ { "timeout_defer", opt_bool, LOFF(timeout_defer) },
+ { "umask", opt_octint, LOFF(umask) },
+ { "use_bsmtp", opt_bool, LOFF(use_bsmtp) },
+ #ifdef HAVE_SETCLASSRESOURCES
+ { "use_classresources", opt_bool, LOFF(use_classresources) },
+ #endif
+ { "use_crlf", opt_bool, LOFF(use_crlf) },
+ { "use_shell", opt_bool, LOFF(use_shell) },
};
/* Size of the options list. An extern variable has to be used so that its
int pipe_transport_options_count =
sizeof(pipe_transport_options)/sizeof(optionlist);
+
+#ifdef MACRO_PREDEF
+
+/* Dummy values */
+pipe_transport_options_block pipe_transport_option_defaults = {0};
+void pipe_transport_init(transport_instance *tblock) {}
+BOOL pipe_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;}
+
+#else /*!MACRO_PREDEF*/
+
+
/* Default private options block for the pipe transport. */
pipe_transport_options_block pipe_transport_option_defaults = {
- NULL, /* cmd */
- NULL, /* allow_commands */
- NULL, /* environment */
- US"/usr/bin", /* path */
- NULL, /* message_prefix (reset in init if not bsmtp) */
- NULL, /* message_suffix (ditto) */
- US mac_expanded_string(EX_TEMPFAIL) ":" /* temp_errors */
- mac_expanded_string(EX_CANTCREAT),
- NULL, /* check_string */
- NULL, /* escape_string */
- 022, /* umask */
- 20480, /* max_output */
- 60*60, /* timeout */
- 0, /* options */
- FALSE, /* freeze_exec_fail */
- FALSE, /* ignore_status */
- FALSE, /* restrict_to_path */
- FALSE, /* timeout_defer */
- FALSE, /* use_shell */
- FALSE, /* use_bsmtp */
- FALSE /* use_crlf */
+ .path = US"/bin:/usr/bin",
+ .temp_errors = US mac_expanded_string(EX_TEMPFAIL) ":"
+ mac_expanded_string(EX_CANTCREAT),
+ .umask = 022,
+ .max_output = 20480,
+ .timeout = 60*60,
+ /* all others null/zero/false */
};
+/*************************************************
+* Setup entry point *
+*************************************************/
+
+/* Called for each delivery in the privileged state, just before the uid/gid
+are changed and the main entry point is called. In a system that supports the
+login_cap facilities, this function is used to set the class resource limits
+for the user. It may also re-enable coredumps.
+
+Arguments:
+ tblock points to the transport instance
+ addrlist addresses about to be delivered (not used)
+ dummy not used (doesn't pass back data)
+ uid the uid that will be set (not used)
+ gid the gid that will be set (not used)
+ errmsg where to put an error message
+
+Returns: OK, FAIL, or DEFER
+*/
+
+static int
+pipe_transport_setup(transport_instance *tblock, address_item *addrlist,
+ transport_feedback *dummy, uid_t uid, gid_t gid, uschar **errmsg)
+{
+pipe_transport_options_block *ob =
+ (pipe_transport_options_block *)(tblock->options_block);
+
+#ifdef HAVE_SETCLASSRESOURCES
+if (ob->use_classresources)
+ {
+ struct passwd *pw = getpwuid(uid);
+ if (pw != NULL)
+ {
+ login_cap_t *lc = login_getpwclass(pw);
+ if (lc != NULL)
+ {
+ setclassresources(lc);
+ login_close(lc);
+ }
+ }
+ }
+#endif
+
+#ifdef RLIMIT_CORE
+if (ob->permit_coredump)
+ {
+ struct rlimit rl;
+ rl.rlim_cur = RLIM_INFINITY;
+ rl.rlim_max = RLIM_INFINITY;
+ if (setrlimit(RLIMIT_CORE, &rl) < 0)
+ {
+#ifdef SETRLIMIT_NOT_SUPPORTED
+ if (errno != ENOSYS && errno != ENOTSUP)
+#endif
+ log_write(0, LOG_MAIN,
+ "delivery setrlimit(RLIMIT_CORE, RLIM_INFINITY) failed: %s",
+ strerror(errno));
+ }
+ }
+#endif
+
+return OK;
+}
+
+
+
/*************************************************
* Initialization entry point *
*************************************************/
pipe_transport_options_block *ob =
(pipe_transport_options_block *)(tblock->options_block);
+/* Set up the setup entry point, to be called in the privileged state */
+
+tblock->setup = pipe_transport_setup;
+
/* If pipe_as_creator is set, then uid/gid should not be set. */
if (tblock->deliver_as_creator && (tblock->uid_set || tblock->gid_set ||
driver options. Only one of body_only and headers_only can be set. */
ob->options |=
- (tblock->body_only? topt_no_headers : 0) |
- (tblock->headers_only? topt_no_body : 0) |
- (tblock->return_path_add? topt_add_return_path : 0) |
- (tblock->delivery_date_add? topt_add_delivery_date : 0) |
- (tblock->envelope_to_add? topt_add_envelope_to : 0) |
- (ob->use_crlf? topt_use_crlf : 0);
+ (tblock->body_only ? topt_no_headers : 0)
+ | (tblock->headers_only ? topt_no_body : 0)
+ | (tblock->return_path_add ? topt_add_return_path : 0)
+ | (tblock->delivery_date_add ? topt_add_delivery_date : 0)
+ | (tblock->envelope_to_add ? topt_add_envelope_to : 0)
+ | (ob->use_crlf ? topt_use_crlf : 0);
}
*/
static BOOL
-set_up_direct_command(uschar ***argvptr, uschar *cmd, BOOL expand_arguments,
- int expand_fail, address_item *addr, uschar *tname,
+set_up_direct_command(const uschar ***argvptr, uschar *cmd,
+ BOOL expand_arguments, int expand_fail, address_item *addr, uschar *tname,
pipe_transport_options_block *ob)
{
BOOL permitted = FALSE;
-uschar **argv;
-uschar buffer[64];
+const uschar **argv;
/* Set up "transport <name>" to be put in any error messages, and then
call the common function for creating an argument list and expanding
the items if necessary. If it fails, this function fails (error information
is in the addresses). */
-sprintf(CS buffer, "%.50s transport", tname);
if (!transport_set_up_command(argvptr, cmd, expand_arguments, expand_fail,
- addr, buffer, NULL))
+ addr, FALSE, string_sprintf("%.50s transport", tname), NULL))
return FALSE;
/* Point to the set-up arguments. */
/* If allow_commands is set, see if the command is in the permitted list. */
-if (ob->allow_commands != NULL)
+if (ob->allow_commands)
{
int sep = 0;
- uschar *s, *p;
- uschar buffer[256];
+ const uschar *s;
+ uschar *p;
- s = expand_string(ob->allow_commands);
- if (s == NULL)
+ if (!(s = expand_string(ob->allow_commands)))
{
addr->transport_return = DEFER;
addr->message = string_sprintf("failed to expand string \"%s\" "
return FALSE;
}
- while ((p = string_nextinlist(&s, &sep, buffer, sizeof(buffer))) != NULL)
- {
+ while ((p = string_nextinlist(&s, &sep, NULL, 0)))
if (Ustrcmp(p, argv[0]) == 0) { permitted = TRUE; break; }
- }
}
/* If permitted is TRUE it means the command was found in the allowed list, and
}
}
- else if (ob->allow_commands != NULL)
+ else if (ob->allow_commands)
{
addr->transport_return = FAIL;
addr->message = string_sprintf("\"%s\" command not permitted by %s "
{
int sep = 0;
uschar *p;
- uschar *listptr = ob->path;
- uschar buffer[1024];
+ const uschar *listptr = expand_string(ob->path);
- while ((p = string_nextinlist(&listptr, &sep, buffer, sizeof(buffer))) != NULL)
+ while ((p = string_nextinlist(&listptr, &sep, NULL, 0)))
{
struct stat statbuf;
sprintf(CS big_buffer, "%.256s/%.256s", p, argv[0]);
break;
}
}
- if (p == NULL)
+ if (!p)
{
addr->transport_return = FAIL;
addr->message = string_sprintf("\"%s\" command not found for %s transport",
*/
static BOOL
-set_up_shell_command(uschar ***argvptr, uschar *cmd, BOOL expand_arguments,
- int expand_fail, address_item *addr, uschar *tname)
+set_up_shell_command(const uschar ***argvptr, uschar *cmd,
+ BOOL expand_arguments, int expand_fail, address_item *addr, uschar *tname)
{
-uschar **argv;
+const uschar **argv;
-*argvptr = argv = store_get((4)*sizeof(uschar *));
+*argvptr = argv = store_get((4)*sizeof(uschar *), GET_UNTAINTED);
argv[0] = US"/bin/sh";
argv[1] = US"-c";
/* We have to take special action to handle the special "variable" called
$pipe_addresses, which is not recognized by the normal expansion function. */
-DEBUG(D_transport)
- debug_printf("shell pipe command before expansion:\n %s\n", cmd);
-
if (expand_arguments)
{
- uschar *s = cmd;
- uschar *p = Ustrstr(cmd, "pipe_addresses");
+ uschar * p = Ustrstr(cmd, "pipe_addresses");
+ gstring * g = NULL;
+
+ DEBUG(D_transport)
+ debug_printf("shell pipe command before expansion:\n %s\n", cmd);
+
+ /* Allow $recipients in the expansion iff it comes from a system filter */
+
+ f.enable_dollar_recipients = addr && addr->parent &&
+ Ustrcmp(addr->parent->address, "system-filter") == 0;
if (p != NULL && (
(p > cmd && p[-1] == '$') ||
(p > cmd + 1 && p[-2] == '$' && p[-1] == '{' && p[14] == '}')))
{
- address_item *ad;
uschar *q = p + 14;
- int size = Ustrlen(cmd) + 64;
- int offset;
if (p[-1] == '{') { q++; p--; }
- s = store_get(size);
- offset = p - cmd - 1;
- Ustrncpy(s, cmd, offset);
+ g = string_get(Ustrlen(cmd) + 64);
+ g = string_catn(g, cmd, p - cmd - 1);
- for (ad = addr; ad != NULL; ad = ad->next)
+ for (address_item * ad = addr; ad; ad = ad->next)
{
- if (ad != addr) string_cat(s, &size, &offset, US" ", 1);
- string_cat(s, &size, &offset, ad->address, Ustrlen(ad->address));
+ DEBUG(D_transport) if (is_tainted(ad->address))
+ debug_printf("tainted element '%s' from $pipe_addresses\n", ad->address);
+
+ /*XXX string_append_listele() ? */
+ if (ad != addr) g = string_catn(g, US" ", 1);
+ g = string_cat(g, ad->address);
}
- string_cat(s, &size, &offset, q, Ustrlen(q));
- s[offset] = 0;
+ g = string_cat(g, q);
+ argv[2] = (cmd = string_from_gstring(g)) ? expand_string(cmd) : NULL;
}
+ else
+ argv[2] = expand_string(cmd);
- /* Allow $recipients in the expansion iff it comes from a system filter */
-
- enable_dollar_recipients = addr != NULL &&
- addr->parent != NULL &&
- Ustrcmp(addr->parent->address, "system-filter") == 0;
- argv[2] = expand_string(s);
- enable_dollar_recipients = FALSE;
+ f.enable_dollar_recipients = FALSE;
- if (argv[2] == NULL)
+ if (!argv[2])
{
- addr->transport_return = search_find_defer? DEFER : expand_fail;
+ addr->transport_return = f.search_find_defer ? DEFER : expand_fail;
addr->message = string_sprintf("Expansion of command \"%s\" "
"in %s transport failed: %s",
cmd, tname, expand_string_message);
DEBUG(D_transport)
debug_printf("shell pipe command after expansion:\n %s\n", argv[2]);
}
-else argv[2] = cmd;
+else
+ {
+ DEBUG(D_transport)
+ debug_printf("shell pipe command (no expansion):\n %s\n", cmd);
+ argv[2] = cmd;
+ }
-argv[3] = (uschar *)0;
+argv[3] = US 0;
return TRUE;
}
int timeout = ob->timeout;
BOOL written_ok = FALSE;
BOOL expand_arguments;
-uschar **argv;
+const uschar **argv;
uschar *envp[50];
-uschar *envlist = ob->environment;
+const uschar *envlist = ob->environment;
uschar *cmd, *ss;
-uschar *eol = (ob->use_crlf)? US"\r\n" : US"\n";
+uschar *eol = ob->use_crlf ? US"\r\n" : US"\n";
+transport_ctx tctx = {
+ .tblock = tblock,
+ .addr = addr,
+ .check_string = ob->check_string,
+ .escape_string = ob->escape_string,
+ ob->options | topt_not_socket /* set at initialization time */
+};
DEBUG(D_transport) debug_printf("%s transport entered\n", tblock->name);
options. */
if (testflag(addr, af_pfr) && addr->local_part[0] == '|')
- {
- cmd = addr->local_part + 1;
- while (isspace(*cmd)) cmd++;
- expand_arguments = testflag(addr, af_expand_pipe);
- expand_fail = FAIL;
- }
+ if (ob->force_command)
+ {
+ /* Enables expansion of $address_pipe into separate arguments */
+ setflag(addr, af_force_command);
+ cmd = ob->cmd;
+ expand_arguments = TRUE;
+ expand_fail = PANIC;
+ }
+ else
+ {
+ cmd = addr->local_part + 1;
+ while (isspace(*cmd)) cmd++;
+ expand_arguments = testflag(addr, af_expand_pipe);
+ expand_fail = FAIL;
+ }
else
{
cmd = ob->cmd;
expand_fail = PANIC;
}
-/* If no command has been supplied, we are in trouble. */
+/* If no command has been supplied, we are in trouble.
+We also check for an empty string since it may be
+coming from addr->local_part[0] == '|' */
-if (cmd == NULL)
+if (!cmd || !*cmd)
{
addr->transport_return = DEFER;
addr->message = string_sprintf("no command specified for %s transport",
tblock->name);
return FALSE;
}
+if (is_tainted(cmd))
+ {
+ DEBUG(D_transport) debug_printf("cmd '%s' is tainted\n", cmd);
+ addr->message = string_sprintf("Tainted '%s' (command "
+ "for %s transport) not permitted", cmd, tblock->name);
+ addr->transport_return = PANIC;
+ return FALSE;
+ }
/* When a pipe is set up by a filter file, there may be values for $thisaddress
and numerical the variables in existence. These are passed in
addr->pipe_expandn for use here. */
-if (expand_arguments && addr->pipe_expandn != NULL)
+if (expand_arguments && addr->pipe_expandn)
{
uschar **ss = addr->pipe_expandn;
expand_nmax = -1;
- if (*ss != NULL) filter_thisaddress = *ss++;
- while (*ss != NULL)
+ if (*ss) filter_thisaddress = *ss++;
+ while (*ss)
{
expand_nstring[++expand_nmax] = *ss;
expand_nlength[expand_nmax] = Ustrlen(*ss++);
envp[envcount++] = string_sprintf("DOMAIN=%s", deliver_domain);
envp[envcount++] = string_sprintf("HOME=%#s", deliver_home);
envp[envcount++] = string_sprintf("MESSAGE_ID=%s", message_id);
-envp[envcount++] = string_sprintf("PATH=%s", ob->path);
+envp[envcount++] = string_sprintf("PATH=%s", expand_string(ob->path));
envp[envcount++] = string_sprintf("RECIPIENT=%#s%#s%#s@%#s",
deliver_localpart_prefix, deliver_localpart, deliver_localpart_suffix,
deliver_domain);
envp[envcount++] = string_sprintf("SENDER=%s", sender_address);
envp[envcount++] = US"SHELL=/bin/sh";
-if (addr->host_list != NULL)
+if (addr->host_list)
envp[envcount++] = string_sprintf("HOST=%s", addr->host_list->name);
-if (timestamps_utc) envp[envcount++] = US"TZ=UTC";
-else if (timezone_string != NULL && timezone_string[0] != 0)
+if (f.timestamps_utc)
+ envp[envcount++] = US"TZ=UTC";
+else if (timezone_string && timezone_string[0])
envp[envcount++] = string_sprintf("TZ=%s", timezone_string);
/* Add any requested items */
-if (envlist != NULL)
- {
- envlist = expand_string(envlist);
- if (envlist == NULL)
+if (envlist)
+ if (!(envlist = expand_cstring(envlist)))
{
addr->transport_return = DEFER;
addr->message = string_sprintf("failed to expand string \"%s\" "
expand_string_message);
return FALSE;
}
- }
-while ((ss = string_nextinlist(&envlist, &envsep, big_buffer, big_buffer_size))
- != NULL)
+while ((ss = string_nextinlist(&envlist, &envsep, NULL, 0)))
{
- if (envcount > sizeof(envp)/sizeof(uschar *) - 2)
+ if (envcount > nelem(envp) - 2)
{
addr->transport_return = DEFER;
+ addr->basic_errno = E2BIG;
addr->message = string_sprintf("too many environment settings for "
"%s transport", tblock->name);
return FALSE;
/* If the -N option is set, can't do any more. */
-if (dont_deliver)
+if (f.dont_deliver)
{
DEBUG(D_transport)
debug_printf("*** delivery by %s transport bypassed by -N option",
uid/gid and current directory. Request that the new process be a process group
leader, so we can kill it and all its children on a timeout. */
-if ((pid = child_open(argv, envp, ob->umask, &fd_in, &fd_out, TRUE)) < 0)
+if ((pid = child_open(USS argv, envp, ob->umask, &fd_in, &fd_out, TRUE,
+ US"pipe-tpt-cmd")) < 0)
{
addr->transport_return = DEFER;
addr->message = string_sprintf(
strerror(errno));
return FALSE;
}
+tctx.u.fd = fd_in;
/* Now fork a process to handle the output that comes down the pipe. */
-if ((outpid = fork()) < 0)
+if ((outpid = exim_fork(US"pipe-tpt-output")) < 0)
{
addr->basic_errno = errno;
addr->transport_return = DEFER;
addr->message = string_sprintf(
"Failed to create process for handling output in %s transport",
tblock->name);
- close(fd_in);
- close(fd_out);
+ (void)close(fd_in);
+ (void)close(fd_out);
return FALSE;
}
if (outpid == 0)
{
int count = 0;
- close(fd_in);
+ (void)close(fd_in);
set_process_info("reading output from |%s", cmd);
while ((rc = read(fd_out, big_buffer, big_buffer_size)) > 0)
{
if (addr->return_file >= 0)
- write(addr->return_file, big_buffer, rc);
+ if(write(addr->return_file, big_buffer, rc) != rc)
+ DEBUG(D_transport) debug_printf("Problem writing to return_file\n");
count += rc;
if (count > ob->max_output)
{
- uschar *message = US"\n\n*** Too much output - remainder discarded ***\n";
DEBUG(D_transport) debug_printf("Too much output from pipe - killed\n");
if (addr->return_file >= 0)
- write(addr->return_file, message, Ustrlen(message));
+ {
+ uschar *message = US"\n\n*** Too much output - remainder discarded ***\n";
+ rc = Ustrlen(message);
+ if(write(addr->return_file, message, rc) != rc)
+ DEBUG(D_transport) debug_printf("Problem writing to return_file\n");
+ }
killpg(pid, SIGKILL);
break;
}
}
- close(fd_out);
+ (void)close(fd_out);
_exit(0);
}
-close(fd_out); /* Not used in this process */
+(void)close(fd_out); /* Not used in this process */
/* Carrying on now with the main parent process. Attempt to write the message
ignore all writing errors. (When in the test harness, we do do a short sleep so
any debugging output is likely to be in the same order.) */
-if (running_in_test_harness) millisleep(500);
+testharness_pause_ms(500);
DEBUG(D_transport) debug_printf("Writing message to pipe\n");
/* First write any configured prefix information */
-if (ob->message_prefix != NULL)
+if (ob->message_prefix)
{
uschar *prefix = expand_string(ob->message_prefix);
- if (prefix == NULL)
+ if (!prefix)
{
- addr->transport_return = search_find_defer? DEFER : PANIC;
+ addr->transport_return = f.search_find_defer? DEFER : PANIC;
addr->message = string_sprintf("Expansion of \"%s\" (prefix for %s "
"transport) failed: %s", ob->message_prefix, tblock->name,
expand_string_message);
return FALSE;
}
- if (!transport_write_block(fd_in, prefix, Ustrlen(prefix)))
+ if (!transport_write_block(&tctx, prefix, Ustrlen(prefix), FALSE))
goto END_WRITE;
}
if (ob->use_bsmtp)
{
- address_item *a;
-
if (!transport_write_string(fd_in, "MAIL FROM:<%s>%s", return_path, eol))
goto END_WRITE;
- for (a = addr; a != NULL; a = a->next)
- {
+ for (address_item * a = addr; a; a = a->next)
if (!transport_write_string(fd_in,
"RCPT TO:<%s>%s",
transport_rcpt_address(a, tblock->rcpt_include_affixes),
eol))
goto END_WRITE;
- }
if (!transport_write_string(fd_in, "DATA%s", eol)) goto END_WRITE;
}
-/* Now the actual message - the options were set at initialization time */
+/* Now the actual message */
-if (!transport_write_message(addr, fd_in, ob->options, 0, tblock->add_headers,
- tblock->remove_headers, ob->check_string, ob->escape_string,
- tblock->rewrite_rules, tblock->rewrite_existflags))
+if (!transport_write_message(&tctx, 0))
goto END_WRITE;
/* Now any configured suffix */
-if (ob->message_suffix != NULL)
+if (ob->message_suffix)
{
uschar *suffix = expand_string(ob->message_suffix);
- if (suffix == NULL)
+ if (!suffix)
{
- addr->transport_return = search_find_defer? DEFER : PANIC;
+ addr->transport_return = f.search_find_defer? DEFER : PANIC;
addr->message = string_sprintf("Expansion of \"%s\" (suffix for %s "
"transport) failed: %s", ob->message_suffix, tblock->name,
expand_string_message);
return FALSE;
}
- if (!transport_write_block(fd_in, suffix, Ustrlen(suffix)))
+ if (!transport_write_block(&tctx, suffix, Ustrlen(suffix), FALSE))
goto END_WRITE;
}
if (errno == ETIMEDOUT)
{
addr->message = string_sprintf("%stimeout while writing to pipe",
- transport_filter_timed_out? "transport filter " : "");
+ f.transport_filter_timed_out ? "transport filter " : "");
addr->transport_return = ob->timeout_defer? DEFER : FAIL;
timeout = 1;
}
addr->more_errno,
(addr->more_errno == EX_EXECFAILED)? ": unable to execute command" : "");
else if (errno == ERRNO_WRITEINCOMPLETE)
- addr->message = string_sprintf("Failed repeatedly to write data");
+ addr->message = US"Failed repeatedly to write data";
else
addr->message = string_sprintf("Error %d", errno);
return FALSE;
if ((rc = child_close(pid, timeout)) != 0)
{
+ uschar * tmsg = addr->message
+ ? string_sprintf(" (preceded by %s)", addr->message) : US"";
+
/* The process did not complete in time; kill its process group and fail
the delivery. It appears to be necessary to kill the output process too, as
otherwise it hangs on for some time if the actual pipe process is sleeping.
killpg(pid, SIGKILL);
kill(outpid, SIGKILL);
addr->transport_return = ob->timeout_defer? DEFER : FAIL;
- addr->message = string_sprintf("pipe delivery process timed out");
+ addr->message = string_sprintf("pipe delivery process timed out%s", tmsg);
}
/* Wait() failed. */
{
addr->transport_return = PANIC;
addr->message = string_sprintf("Wait() failed for child process of %s "
- "transport: %s", tblock->name, strerror(errno));
+ "transport: %s%s", tblock->name, strerror(errno), tmsg);
+ }
+
+ /* Since the transport_filter timed out we assume it has sent the child process
+ a malformed or incomplete data stream. Kill off the child process
+ and prevent checking its exit status as it will has probably exited in error.
+ This prevents the transport_filter timeout message from getting overwritten
+ by the exit error which is not the cause of the problem. */
+
+ else if (f.transport_filter_timed_out)
+ {
+ killpg(pid, SIGKILL);
+ kill(outpid, SIGKILL);
}
/* Either the process completed, but yielded a non-zero (necessarily
positive) status, or the process was terminated by a signal (rc will contain
the negation of the signal number). Treat killing by signal as failure unless
- status is being ignored. */
+ status is being ignored. By default, the message is bounced back, unless
+ freeze_signal is set, in which case it is frozen instead. */
else if (rc < 0)
{
- if (!ob->ignore_status)
+ if (ob->freeze_signal)
+ {
+ addr->transport_return = DEFER;
+ addr->special_action = SPECIAL_FREEZE;
+ addr->message = string_sprintf("Child process of %s transport (running "
+ "command \"%s\") was terminated by signal %d (%s)%s", tblock->name, cmd,
+ -rc, os_strsignal(-rc), tmsg);
+ }
+ else if (!ob->ignore_status)
{
addr->transport_return = FAIL;
addr->message = string_sprintf("Child process of %s transport (running "
- "command \"%s\") was terminated by signal %d (%s)", tblock->name, cmd,
- -rc, os_strsignal(-rc));
+ "command \"%s\") was terminated by signal %d (%s)%s", tblock->name, cmd,
+ -rc, os_strsignal(-rc), tmsg);
}
}
the command that was given is a non-existent path). By default this is
treated as just another failure, but if freeze_exec_fail is set, the reaction
is to freeze the message rather than bounce the address. Exim used to signal
- this failure with EX_UNAVAILABLE, which is definined in many systems as
+ this failure with EX_UNAVAILABLE, which is defined in many systems as
#define EX_UNAVAILABLE 69
{
/* Always handle execve() failure specially if requested to */
- if (ob->freeze_exec_fail && (rc == EX_EXECFAILED))
+ if (ob->freeze_exec_fail && rc == EX_EXECFAILED)
{
addr->transport_return = DEFER;
addr->special_action = SPECIAL_FREEZE;
- addr->message = string_sprintf("pipe process failed to exec \"%s\"",
- cmd);
+ addr->message = string_sprintf("pipe process failed to exec \"%s\"%s",
+ cmd, tmsg);
}
/* Otherwise take action only if not ignoring status */
else if (!ob->ignore_status)
{
uschar *ss;
- int size, ptr, i;
+ gstring * g;
- /* If temp_errors is "*" all codes are temporary. Initializion checks
+ /* If temp_errors is "*" all codes are temporary. Initialization checks
that it's either "*" or a list of numbers. If not "*", scan the list of
temporary failure codes; if any match, the result is DEFER. */
else
{
- uschar *s = ob->temp_errors;
+ const uschar *s = ob->temp_errors;
uschar *p;
- uschar buffer[64];
int sep = 0;
addr->transport_return = FAIL;
- while ((p = string_nextinlist(&s,&sep,buffer,sizeof(buffer))) != NULL)
- {
+ while ((p = string_nextinlist(&s,&sep,NULL,0)))
if (rc == Uatoi(p)) { addr->transport_return = DEFER; break; }
- }
}
/* Ensure the message contains the expanded command and arguments. This
addr->message = string_sprintf("Child process of %s transport returned "
"%d", tblock->name, rc);
-
- ptr = Ustrlen(addr->message);
- size = ptr + 1;
+ g = string_cat(NULL, addr->message);
/* If the return code is > 128, it often means that a shell command
was terminated by a signal. */
rc-128, os_strsignal(rc-128)) :
US os_strexit(rc);
- if (*ss != 0)
+ if (*ss)
{
- addr->message = string_cat(addr->message, &size, &ptr, US" ", 1);
- addr->message = string_cat(addr->message, &size, &ptr,
- ss, Ustrlen(ss));
+ g = string_catn(g, US" ", 1);
+ g = string_cat (g, ss);
}
/* Now add the command and arguments */
- addr->message = string_cat(addr->message, &size, &ptr,
- US" from command:", 14);
+ g = string_catn(g, US" from command:", 14);
- for (i = 0; i < sizeof(argv)/sizeof(int *) && argv[i] != NULL; i++)
+ for (int i = 0; i < sizeof(argv)/sizeof(int *) && argv[i] != NULL; i++)
{
BOOL quote = FALSE;
- addr->message = string_cat(addr->message, &size, &ptr, US" ", 1);
+ g = string_catn(g, US" ", 1);
if (Ustrpbrk(argv[i], " \t") != NULL)
{
quote = TRUE;
- addr->message = string_cat(addr->message, &size, &ptr, US"\"", 1);
+ g = string_catn(g, US"\"", 1);
}
- addr->message = string_cat(addr->message, &size, &ptr, argv[i],
- Ustrlen(argv[i]));
+ g = string_cat(g, argv[i]);
if (quote)
- addr->message = string_cat(addr->message, &size, &ptr, US"\"", 1);
+ g = string_catn(g, US"\"", 1);
}
- addr->message[ptr] = 0; /* Ensure concatenated string terminated */
+
+ /* Add previous filter timeout message, if present. */
+
+ if (*tmsg)
+ g = string_cat(g, tmsg);
+
+ addr->message = string_from_gstring(g);
}
}
}
return FALSE;
}
+#endif /*!MACRO_PREDEF*/
/* End of transport/pipe.c */
git://git.exim.org / exim.git / blobdiff