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/*
* ProFTPD - FTP server daemon
* Copyright (c) 1997, 1998 Public Flood Software
* Copyright (c) 1999, 2000 MacGyver aka Habeeb J. Dihu <macgyver@tos.net>
* Copyright (c) 2001-2020 The ProFTPD Project team
*
* 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
*
* As a special exemption, Public Flood Software/MacGyver aka Habeeb J. Dihu
* and other respective copyright holders give permission to link this program
* with OpenSSL, and distribute the resulting executable, without including
* the source code for OpenSSL in the source distribution.
*/
/* Notify the user when a given file was last changed
*
* Configuration:
* DisplayReadme <file-or-pattern>
*
* "DisplayReadme Readme" will tell the user when "Readme" on the current
* working directory was last changed. When the current working directory is
* changed (i.e. CWD, CDUP, etc), mod_readme will search for Readme again
* in that directory and also display its last changing dates if found.
*/
#include "conf.h"
#define MOD_README_VERSION "mod_readme/1.0"
static void readme_add_path(pool *p, const char *path) {
struct stat st;
if (pr_fsio_stat(path, &st) == 0) {
int days = 0;
time_t now;
struct tm *now_tm = NULL;
char time_str[32] = {'\0'};
(void) time(&now);
now_tm = pr_gmtime(p, &now);
if (now_tm != NULL) {
struct tm *mtime_tm = NULL;
char *ptr = NULL;
days = (int) (365.25 * now_tm->tm_year) + now_tm->tm_yday;
mtime_tm = pr_gmtime(p, &st.st_mtime);
if (mtime_tm != NULL) {
days -= (int) (365.25 * mtime_tm->tm_year) + mtime_tm->tm_yday;
} else {
pr_log_debug(DEBUG3, MOD_README_VERSION
": error obtaining GMT timestamp: %s", strerror(errno));
}
memset(time_str, '\0', sizeof(time_str));
#if defined(HAVE_CTIME_R)
pr_snprintf(time_str, sizeof(time_str)-1, "%.26s",
ctime_r(&st.st_mtime, time_str));
#else
pr_snprintf(time_str, sizeof(time_str)-1, "%.26s", ctime(&st.st_mtime));
#endif /* HAVE_CTIME_R */
ptr = strchr(time_str, '\n');
if (ptr != NULL) {
*ptr = '\0';
}
} else {
pr_log_debug(DEBUG3, MOD_README_VERSION
": error obtaining GMT timestamp: %s", strerror(errno));
}
/* As a format nicety, if we're handling the PASS command, automatically
* add a blank line before this message, so as to separate the
* login message that mod_auth's POST_CMD handler for PASS will add from
* our message (see Bug#3605).
*/
if (strcmp(session.curr_cmd, C_PASS) == 0) {
pr_response_add(R_DUP, "%s", "");
}
pr_response_add(R_DUP, _("Please read the file %s"), path);
if (now_tm != NULL) {
pr_response_add(R_DUP, _(" it was last modified on %.26s - %i %s ago"),
time_str, days, days == 1 ? _("day") : _("days"));
}
}
}
static void readme_add_pattern(pool *p, const char *pattern) {
glob_t g;
int a;
a = pr_fs_glob(pattern, 0, NULL, &g);
if (!a) {
char **path;
path = g.gl_pathv;
while (path && *path) {
pr_signals_handle();
readme_add_path(p, *path);
path++;
}
} else if (a == GLOB_NOSPACE) {
pr_log_debug(DEBUG3, MOD_README_VERSION
": out of memory during globbing of '%s'", pattern);
} else if (a == GLOB_ABORTED) {
pr_log_debug(DEBUG3, MOD_README_VERSION
": read error during globbing of '%s'", pattern);
} else if (a != GLOB_NOMATCH) {
pr_log_debug(DEBUG3, MOD_README_VERSION
": unknown error during globbing of '%s'", pattern);
}
pr_fs_globfree(&g);
}
/* Command handlers
*/
MODRET readme_post_cmd(cmd_rec *cmd) {
config_rec *c;
c = find_config(CURRENT_CONF, CONF_PARAM, "DisplayReadme", FALSE);
while (c) {
char *path;
path = c->argv[0];
pr_log_debug(DEBUG5, "Checking for display pattern %s", path);
readme_add_pattern(cmd->tmp_pool, path);
c = find_config_next(c, c->next, CONF_PARAM, "DisplayReadme",FALSE);
}
return PR_DECLINED(cmd);
}
/* Configuration handlers
*/
/* usage: DisplayReadme path|pattern */
MODRET set_displayreadme(cmd_rec *cmd) {
config_rec *c;
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL|CONF_ANON);
if (cmd->argc != 2) {
CONF_ERROR(cmd, "syntax: DisplayReadme <filename-or-pattern>");
}
c = add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
c->flags |= CF_MERGEDOWN;
pr_log_debug(DEBUG5, "Added pattern %s to readme list",
(char *) cmd->argv[1]);
return PR_HANDLED(cmd);
}
/* Module API tables
*/
static conftable readme_conftab[] = {
{ "DisplayReadme", set_displayreadme, NULL },
{ NULL }
};
static cmdtable readme_cmdtab[] = {
{ POST_CMD, C_CWD, G_NONE, readme_post_cmd, FALSE, FALSE },
{ POST_CMD, C_CDUP, G_NONE, readme_post_cmd, FALSE, FALSE },
{ POST_CMD, C_XCWD, G_NONE, readme_post_cmd, FALSE, FALSE },
{ POST_CMD, C_XCUP, G_NONE, readme_post_cmd, FALSE, FALSE },
/* We specifically use a LOG_CMD handler here, so that any DisplayReadme
* output is append after any possible DisplayLogin data (see Bug#3605).
*/
{ LOG_CMD, C_PASS, G_NONE, readme_post_cmd, FALSE, FALSE },
{ 0, NULL }
};
module readme_module = {
/* Always NULL */
NULL, NULL,
/* Module API version */
0x20,
/* Module name */
"readme",
/* Module configuration directive table */
readme_conftab,
/* Module command handler table */
readme_cmdtab,
/* Module auth handler table */
NULL,
/* Module initialization */
NULL,
/* Session initialization */
NULL,
/* Module version */
MOD_README_VERSION
};
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