--- a/commands/vcheckquota.cc Sun Jan 20 00:12:17 2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,236 +0,0 @@
-// Copyright (C) 1999,2000 Bruce Guenter <bruceg@em.ca>
-//
-// This program is free software; you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 2 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
-#include <config.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <time.h>
-#include "config/configrc.h"
-#include "cli/cli.h"
-#include "fdbuf/fdbuf.h"
-#include "vcommand.h"
-#include "ac/dirent.h"
-#include "misc/itoa.h"
-#include "misc/stat_fns.h"
-#include "misc/md5.h"
-#include "misc/strtou.h"
-#include "misc/utoa.h"
-
-const char* cli_program = "vcheckquota";
-const char* cli_help_prefix = "vmailmgr quota enforcement program\n";
-const char* cli_help_suffix = "
-Warning: the soft-message is linked into the users maildir once for each
-message that is received while the account is over its soft quota. This may
-result in multiple warning messages.\n";
-const char* cli_args_usage = "";
-const int cli_args_min = 0;
-const int cli_args_max = 0;
-static unsigned soft_maxsize = 4096;
-static const char* soft_message = 0;
-
-// F<vcheckquota> ensures that the hard and soft quotas are enforced,
-// that message counts and sizes are appropriately limited.
-// The limits are set by the vadduser or vchattr command.
-//
-// The following rules are applied:
-//
-// =over 8
-//
-// =item 1
-//
-// If the message is larger than the message size limit, it is rejected.
-//
-// =item 2
-//
-// If the user has too many messages in their mailbox,
-// further messages are rejected.
-//
-// =item 3
-//
-// If the user is over their hard quota, all further messages are rejected
-// and no warning messages are linked in.
-//
-// =item 4
-//
-// If the user is over their soft quota, and the message is small
-// (as defined by I<soft-maxsize>), the message is accepted, otherwise
-// it is rejected. If I<soft-message> is defined, a warning message
-// is linked into the mailbox in either case.
-//
-// =back
-
-cli_option cli_options[] = {
- { 'a', "soft-maxsize", cli_option::uinteger, 0, &soft_maxsize,
- "The maximum message size after soft quota is reached", "4096" },
- { 'm', "soft-message", cli_option::string, 0, &soft_message,
- "The path to the soft quota warning message", "no message" },
- {0}
-};
-
-// SEE ALSO
-//
-// vadduser(1), vchattr(1)
-
-void exit_msg(const char* msg, int code)
-{
- fout << "vcheckquota: " << msg << endl;
- exit(code);
-}
-void die_fail(const char* msg) { exit_msg(msg, 100); }
-void die_temp(const char* msg) { exit_msg(msg, 111); }
-
-bool stat_dir(const mystring& dirname, unsigned& count, unsigned long& size) {
- struct stat buf;
- DIR* dir = opendir(dirname.c_str());
- if(!dir)
- die_temp("Could not maildir\n");
-
- while(dirent* entry = readdir(dir)) {
- const char* name = entry->d_name;
- if(name[0] == '.' &&
- (NAMLEN(entry) == 1 ||
- (name[1] == '.' && NAMLEN(entry) == 2)))
- continue;
-
- mystring fullname = dirname + "/" + name;
-
- if(stat(fullname.c_str(), &buf) == -1) {
- fout << "Cannot stat " << fullname.c_str() << "\n";
- return false;
- }
-
- if(S_ISREG(buf.st_mode)) {
- ++count;
- size += buf.st_blocks * 512;
- }
- }
- closedir(dir);
- return true;
-}
-
-void link_softquota_message(const mystring& mailbox)
-{
- mystring newdir = mailbox + "/new/";
- pid_t pid = getpid();
- for(;;) {
- mystring path = newdir + itoa(time(0)) + ".";
- path = path + itoa(pid) + ".softquota-warning";
- if(symlink(soft_message, path.c_str()) == 0)
- return;
- if(errno != EEXIST)
- die_temp("Could not create symlink to soft quota warning message");
- sleep(1);
- }
-}
-
-void check_quota(mystring mailbox,
- unsigned hardquota, unsigned softquota,
- unsigned maxsize, unsigned maxcount)
-{
- /*
- * There are 4 cases to consider when comparing disk useage (du)
- * agains hard and soft quotas:
- *
- * Case 1: soft = 0, hard = 0: user has no quota set
- * Case 2: soft = 0, hard > 0: use hard quota
- * Case 3: soft > 0, hard = 0: treat soft quota as hard
- * Case 4: soft > 0, hard > 0: if du becomes larger
- * then soft quota, allow message in if
- * a) it is small (<2048 bytes),
- * b) it would not put du over hard quota.
- */
-
-
- //compute message size
- struct stat st;
- if(fstat(0, &st) == -1)
- die_temp("Failed to stat message");
-
- unsigned long msgsize = st.st_blocks * 512;
-
- if(maxsize != UINT_MAX && msgsize > maxsize)
- //message is too large
- die_fail("Sorry, this message is larger than the current maximum message size limit.\n");
-
- /* Case 1: no quotas set */
- if(softquota == UINT_MAX && hardquota == UINT_MAX && maxcount == UINT_MAX)
- return;
-
- mystring dirname = mailbox;
- mystring newdir = dirname + "/new";
- mystring curdir = dirname + "/cur";
- unsigned cur_count=0;
- unsigned long cur_size=0;
- unsigned new_count=0;
- unsigned long new_size=0;
-
- //treat stat_dir failures as temp errors
- if(!stat_dir(newdir, new_count, new_size))
- die_temp("Failed to stat new dir");
- if(!stat_dir(curdir, cur_count, cur_size))
- die_temp("Failed to stat cur dir");
-
- unsigned long du = cur_size + new_size + msgsize;
- unsigned msgcount = cur_count + new_count + 1;
-
- //too many messages in the mbox
- if(maxcount != UINT_MAX && msgcount > maxcount)
- die_fail("Sorry, the person you sent this message has too many messages stored in the mailbox\n");
-
- // No total size quotas are set
- if(hardquota == UINT_MAX)
- if(softquota == UINT_MAX)
- return;
- // Take care of Cases 2 and 3, and make everything look like Case 4
- else
- hardquota = softquota;
-
- // Check hard quota before soft quota, as it has priority
- if(du > hardquota)
- die_fail("Message would exceed virtual user's disk quota.\n");
-
- // Soft quota allows small (4K default) messages
- // In other words, it only blocks large messages
- if(du > softquota) {
- if(soft_message)
- link_softquota_message(mailbox);
- if(msgsize > soft_maxsize)
- die_fail("Sorry, your message cannot be delivered.\n"
- "User's disk quota exceeded.\n"
- "A small message will be delivered should you wish "
- "to inform this person.\n");
- }
-}
-
-int cli_main(int, char**)
-{
-#define ENV_VAR_REQ(VAR,ENV) const char* tmp__##VAR = getenv(#ENV); if(!tmp__##VAR) die_fail(#ENV " is not set");
-#define ENV_VAR_STR(VAR,ENV) ENV_VAR_REQ(VAR,ENV) mystring VAR = tmp__##VAR;
-#define ENV_VAR_UINT(VAR,ENV) ENV_VAR_REQ(VAR,ENV) unsigned VAR = strtou(tmp__##VAR, &tmp__##VAR); if(*tmp__##VAR) die_fail(#ENV " is not a valid number");
-
- ENV_VAR_STR(maildir, MAILDIR);
- // Always succeed for aliases.
- if(!maildir)
- return 0;
-
- ENV_VAR_UINT(maxsize, VUSER_MSGSIZE);
- ENV_VAR_UINT(maxcount, VUSER_MSGCOUNT);
- ENV_VAR_UINT(hardquota, VUSER_HARDQUOTA);
- ENV_VAR_UINT(softquota, VUSER_SOFTQUOTA);
-
- check_quota(maildir, hardquota, softquota, maxsize, maxcount);
- return 0;
-}