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https://github.com/samba-team/samba.git
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4206d97544
(This used to be commit ef0184d580
)
332 lines
8.2 KiB
C
332 lines
8.2 KiB
C
/*
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Samba Unix/Linux SMB client library
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Distributed SMB/CIFS Server Management Utility
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Copyright (C) Rafal Szczesniak 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "net.h"
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/**
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* @file net_cache.c
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* @brief This is part of the net tool which is basically command
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* line wrapper for gencache.c functions (mainly for testing)
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*
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**/
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/*
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* These routines are used via gencache_iterate() to display the cache's contents
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* (print_cache_entry) and to flush it (delete_cache_entry).
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* Both of them are defined by first arg of gencache_iterate() routine.
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*/
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static void print_cache_entry(const char* keystr, const char* datastr,
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const time_t timeout, void* dptr)
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{
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char *timeout_str;
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char *alloc_str = NULL;
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time_t now_t = time(NULL);
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struct tm timeout_tm, *now_tm;
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/* localtime returns statically allocated pointer, so timeout_tm
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has to be copied somewhere else */
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now_tm = localtime(&timeout);
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if (!now_tm) {
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return;
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}
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memcpy(&timeout_tm, now_tm, sizeof(struct tm));
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now_tm = localtime(&now_t);
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if (!now_tm) {
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return;
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}
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/* form up timeout string depending whether it's today's date or not */
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if (timeout_tm.tm_year != now_tm->tm_year ||
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timeout_tm.tm_mon != now_tm->tm_mon ||
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timeout_tm.tm_mday != now_tm->tm_mday) {
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timeout_str = asctime(&timeout_tm);
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if (!timeout_str) {
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return;
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}
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timeout_str[strlen(timeout_str) - 1] = '\0'; /* remove tailing CR */
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} else {
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asprintf(&alloc_str, "%.2d:%.2d:%.2d", timeout_tm.tm_hour,
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timeout_tm.tm_min, timeout_tm.tm_sec);
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if (!alloc_str) {
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return;
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}
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timeout_str = alloc_str;
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}
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d_printf("Key: %s\t Timeout: %s\t Value: %s %s\n", keystr,
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timeout_str, datastr, timeout > now_t ? "": "(expired)");
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SAFE_FREE(alloc_str);
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}
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static void delete_cache_entry(const char* keystr, const char* datastr,
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const time_t timeout, void* dptr)
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{
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if (!gencache_del(keystr))
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d_fprintf(stderr, "Couldn't delete entry! key = %s\n", keystr);
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}
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/**
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* Parse text representation of timeout value
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*
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* @param timeout_str string containing text representation of the timeout
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* @return numeric timeout of time_t type
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**/
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static time_t parse_timeout(const char* timeout_str)
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{
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char sign = '\0', *number = NULL, unit = '\0';
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int len, number_begin, number_end;
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time_t timeout;
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/* sign detection */
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if (timeout_str[0] == '!' || timeout_str[0] == '+') {
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sign = timeout_str[0];
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number_begin = 1;
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} else {
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number_begin = 0;
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}
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/* unit detection */
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len = strlen(timeout_str);
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switch (timeout_str[len - 1]) {
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case 's':
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case 'm':
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case 'h':
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case 'd':
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case 'w': unit = timeout_str[len - 1];
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}
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/* number detection */
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len = (sign) ? strlen(&timeout_str[number_begin]) : len;
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number_end = (unit) ? len - 1 : len;
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number = SMB_STRNDUP(&timeout_str[number_begin], number_end);
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/* calculate actual timeout value */
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timeout = (time_t)atoi(number);
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switch (unit) {
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case 'm': timeout *= 60; break;
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case 'h': timeout *= 60*60; break;
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case 'd': timeout *= 60*60*24; break;
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case 'w': timeout *= 60*60*24*7; break; /* that's fair enough, I think :) */
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}
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switch (sign) {
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case '!': timeout = time(NULL) - timeout; break;
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case '+':
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default: timeout += time(NULL); break;
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}
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if (number) SAFE_FREE(number);
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return timeout;
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}
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/**
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* Add an entry to the cache. If it does exist, then set it.
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*
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* @param c A net_context structure
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* @param argv key, value and timeout are passed in command line
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* @return 0 on success, otherwise failure
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**/
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static int net_cache_add(struct net_context *c, int argc, const char **argv)
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{
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const char *keystr, *datastr, *timeout_str;
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time_t timeout;
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if (argc < 3) {
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d_printf("\nUsage: net cache add <key string> <data string> <timeout>\n");
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return -1;
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}
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keystr = argv[0];
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datastr = argv[1];
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timeout_str = argv[2];
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/* parse timeout given in command line */
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timeout = parse_timeout(timeout_str);
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if (!timeout) {
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d_fprintf(stderr, "Invalid timeout argument.\n");
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return -1;
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}
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if (gencache_set(keystr, datastr, timeout)) {
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d_printf("New cache entry stored successfully.\n");
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gencache_shutdown();
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return 0;
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}
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d_fprintf(stderr, "Entry couldn't be added. Perhaps there's already such a key.\n");
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gencache_shutdown();
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return -1;
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}
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/**
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* Delete an entry in the cache
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*
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* @param c A net_context structure
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* @param argv key to delete an entry of
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* @return 0 on success, otherwise failure
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**/
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static int net_cache_del(struct net_context *c, int argc, const char **argv)
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{
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const char *keystr = argv[0];
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if (argc < 1) {
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d_printf("\nUsage: net cache del <key string>\n");
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return -1;
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}
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if(gencache_del(keystr)) {
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d_printf("Entry deleted.\n");
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return 0;
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}
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d_fprintf(stderr, "Couldn't delete specified entry\n");
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return -1;
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}
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/**
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* Get and display an entry from the cache
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*
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* @param c A net_context structure
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* @param argv key to search an entry of
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* @return 0 on success, otherwise failure
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**/
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static int net_cache_get(struct net_context *c, int argc, const char **argv)
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{
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const char* keystr = argv[0];
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char* valuestr;
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time_t timeout;
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if (argc < 1) {
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d_printf("\nUsage: net cache get <key>\n");
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return -1;
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}
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if (gencache_get(keystr, &valuestr, &timeout)) {
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print_cache_entry(keystr, valuestr, timeout, NULL);
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return 0;
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}
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d_fprintf(stderr, "Failed to find entry\n");
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return -1;
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}
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/**
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* Search an entry/entries in the cache
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*
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* @param c A net_context structure
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* @param argv key pattern to match the entries to
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* @return 0 on success, otherwise failure
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**/
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static int net_cache_search(struct net_context *c, int argc, const char **argv)
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{
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const char* pattern;
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if (argc < 1) {
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d_printf("Usage: net cache search <pattern>\n");
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return -1;
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}
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pattern = argv[0];
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gencache_iterate(print_cache_entry, NULL, pattern);
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return 0;
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}
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/**
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* List the contents of the cache
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*
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* @param c A net_context structure
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* @param argv ignored in this functionailty
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* @return always returns 0
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**/
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static int net_cache_list(struct net_context *c, int argc, const char **argv)
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{
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const char* pattern = "*";
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gencache_iterate(print_cache_entry, NULL, pattern);
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gencache_shutdown();
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return 0;
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}
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/**
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* Flush the whole cache
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*
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* @param c A net_context structure
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* @param argv ignored in this functionality
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* @return always returns 0
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**/
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static int net_cache_flush(struct net_context *c, int argc, const char **argv)
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{
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const char* pattern = "*";
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gencache_iterate(delete_cache_entry, NULL, pattern);
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gencache_shutdown();
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return 0;
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}
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/**
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* Short help
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*
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* @param c A net_context structure
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* @param argv ignored in this functionality
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* @return always returns -1
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**/
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static int net_cache_usage(struct net_context *c, int argc, const char **argv)
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{
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d_printf(" net cache add \t add add new cache entry\n");
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d_printf(" net cache del \t delete existing cache entry by key\n");
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d_printf(" net cache flush \t delete all entries existing in the cache\n");
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d_printf(" net cache get \t get cache entry by key\n");
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d_printf(" net cache search \t search for entries in the cache, by given pattern\n");
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d_printf(" net cache list \t list all cache entries (just like search for \"*\")\n");
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return -1;
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}
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/**
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* Entry point to 'net cache' subfunctionality
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*
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* @param c A net_context structure
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* @param argv arguments passed to further called functions
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* @return whatever further functions return
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**/
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int net_cache(struct net_context *c, int argc, const char **argv)
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{
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struct functable func[] = {
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{"add", net_cache_add},
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{"del", net_cache_del},
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{"get", net_cache_get},
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{"search", net_cache_search},
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{"list", net_cache_list},
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{"flush", net_cache_flush},
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{NULL, NULL}
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};
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return net_run_function(c, argc, argv, func, net_cache_usage);
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}
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