663 lines
14 KiB
C
663 lines
14 KiB
C
/*
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* This file is distributed as part of MaxScale. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright MariaDB Corporation Ab 2014
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*/
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/**
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* @file maxadmin.c - The MaxScale administration client
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 13/06/14 Mark Riddoch Initial implementation
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* 15/06/14 Mark Riddoch Addition of source command
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* 26/06/14 Mark Riddoch Fix issue with final OK split across
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* multiple reads
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*
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* @endverbatim
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*/
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <locale.h>
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#include <errno.h>
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#include <getopt.h>
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#include <version.h>
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#ifdef HISTORY
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#include <histedit.h>
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#endif
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static int connectMaxScale(char *hostname, char *port);
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static int setipaddress(struct in_addr *a, char *p);
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static int authMaxScale(int so, char *user, char *password);
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static int sendCommand(int so, char *cmd);
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static void DoSource(int so, char *cmd);
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static void DoUsage();
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static int isquit(char *buf);
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static void PrintVersion(const char *progname);
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static void read_inifile(char **hostname, char **port, char **user, char **passwd,int*);
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#ifdef HISTORY
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static char *
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prompt(EditLine *el __attribute__((__unused__)))
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{
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static char prompt[] = "MaxScale> ";
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return prompt;
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}
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#endif
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static struct option long_options[] = {
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{"host", required_argument, 0, 'h'},
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{"user", required_argument, 0, 'u'},
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{"password", required_argument, 0, 'p'},
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{"port", required_argument, 0, 'P'},
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{"version", no_argument, 0, 'v'},
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{"help", no_argument, 0, '?'},
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{"emacs", no_argument, 0, 'e'},
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{0, 0, 0, 0}
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};
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/**
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* The main for the maxadmin client
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*
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* @param argc Number of arguments
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* @param argv The command line arguments
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*/
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int
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main(int argc, char **argv)
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{
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const char* vi = "vi";
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const char* emacs = "emacs";
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int i, num, rv;
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#ifdef HISTORY
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char *buf;
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EditLine *el = NULL;
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Tokenizer *tok;
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History *hist;
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HistEvent ev;
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#else
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char buf[1024];
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#endif
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char *hostname = "localhost";
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char *port = "6603";
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char *user = "admin";
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char *passwd = NULL;
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int use_emacs = 0;
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int so;
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int option_index = 0;
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char c;
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read_inifile(&hostname, &port, &user, &passwd,&use_emacs);
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while ((c = getopt_long(argc, argv, "h:p:P:u:v?e",
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long_options, &option_index))
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>= 0)
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{
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switch (c) {
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case 'h':
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hostname = strdup(optarg);
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break;
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case 'p':
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passwd = strdup(optarg);
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break;
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case 'P':
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port = strdup(optarg);
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break;
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case 'u':
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user = strdup(optarg);
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break;
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case 'v':
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PrintVersion(*argv);
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exit(EXIT_SUCCESS);
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case 'e':
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use_emacs = 1;
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break;
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case '?':
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DoUsage(*argv);
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exit(optopt ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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}
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if (passwd == NULL)
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{
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struct termios tty_attr;
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tcflag_t c_lflag;
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if (tcgetattr(STDIN_FILENO, &tty_attr) < 0)
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return -1;
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c_lflag = tty_attr.c_lflag;
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tty_attr.c_lflag &= ~ICANON;
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tty_attr.c_lflag &= ~ECHO;
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if (tcsetattr(STDIN_FILENO, 0, &tty_attr) < 0)
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return -1;
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printf("Password: ");
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passwd = malloc(80);
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fgets(passwd, 80, stdin);
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tty_attr.c_lflag = c_lflag;
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if (tcsetattr(STDIN_FILENO, 0, &tty_attr) < 0)
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return -1;
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i = strlen(passwd);
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if (i > 1)
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passwd[i - 1] = '\0';
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printf("\n");
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}
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if ((so = connectMaxScale(hostname, port)) == -1)
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exit(1);
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if (!authMaxScale(so, user, passwd))
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{
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fprintf(stderr, "Failed to connect to MaxScale. "
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"Incorrect username or password.\n");
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exit(1);
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}
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if (optind < argc) {
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int i, len = 0;
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char *cmd;
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for (i = optind; i < argc; i++) {
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len += strlen(argv[i]) + 1;
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}
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cmd = malloc(len + (2 * argc)); // Allow for quotes
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strncpy(cmd, argv[optind],len + (2 * argc));
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for (i = optind +1; i < argc; i++)
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{
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strcat(cmd, " ");
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/* Arguments after the second are quoted to allow for names
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* that contain white space
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*/
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if (i - optind > 1)
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{
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strcat(cmd, "\"");
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strcat(cmd, argv[i]);
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strcat(cmd, "\"");
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}
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else
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strcat(cmd, argv[i]);
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}
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if (access(cmd, R_OK) == 0)
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DoSource(so, cmd);
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else
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sendCommand(so, cmd);
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free(cmd);
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exit(0);
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}
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(void) setlocale(LC_CTYPE, "");
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#ifdef HISTORY
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hist = history_init(); /* Init the builtin history */
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/* Remember 100 events */
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history(hist, &ev, H_SETSIZE, 100);
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tok = tok_init(NULL); /* Initialize the tokenizer */
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/* Initialize editline */
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el = el_init(*argv, stdin, stdout, stderr);
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if(use_emacs)
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el_set(el, EL_EDITOR, emacs); /** Editor is emacs */
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else
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el_set(el, EL_EDITOR, vi); /* Default editor is vi */
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el_set(el, EL_SIGNAL, 1); /* Handle signals gracefully */
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el_set(el, EL_PROMPT, prompt);/* Set the prompt function */
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/* Tell editline to use this history interface */
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el_set(el, EL_HIST, history, hist);
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/*
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* Bind j, k in vi command mode to previous and next line, instead
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* of previous and next history.
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*/
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el_set(el, EL_BIND, "-a", "k", "ed-prev-line", NULL);
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el_set(el, EL_BIND, "-a", "j", "ed-next-line", NULL);
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/*
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* Source the user's defaults file.
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*/
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el_source(el, NULL);
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while ((buf = (char *)el_gets(el, &num)) != NULL && num != 0)
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{
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#else
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while (printf("MaxScale> ") && fgets(buf, 1024, stdin) != NULL)
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{
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num = strlen(buf);
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#endif
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/* Strip trailing \n\r */
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for (i = num - 1; buf[i] == '\r' || buf[i] == '\n'; i--)
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buf[i] = 0;
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#ifdef HISTORY
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el_line(el);
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history(hist, &ev, H_ENTER, buf);
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#endif
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if (isquit(buf))
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{
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break;
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}
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else if (!strcasecmp(buf, "history"))
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{
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#ifdef HISTORY
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for (rv = history(hist, &ev, H_LAST); rv != -1;
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rv = history(hist, &ev, H_PREV))
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fprintf(stdout, "%4d %s\n",
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ev.num, ev.str);
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#else
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fprintf(stderr, "History not supported in this version.\n");
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#endif
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}
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else if (!strncasecmp(buf, "source", 6))
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{
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char *ptr;
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/* Find the filename */
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ptr = &buf[strlen("source")];
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while (*ptr && isspace(*ptr))
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ptr++;
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DoSource(so, ptr);
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}
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else if (*buf)
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{
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if (!sendCommand(so, buf))
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{
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return 0;
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}
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}
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}
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#ifdef HISTORY
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el_end(el);
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tok_end(tok);
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history_end(hist);
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#endif
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close(so);
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return 0;
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}
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/**
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* Connect to the MaxScale server
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*
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* @param hostname The hostname to connect to
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* @param port The port to use for the connection
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* @return The connected socket or -1 on error
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*/
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static int
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connectMaxScale(char *hostname, char *port)
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{
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struct sockaddr_in addr;
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int so;
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int keepalive = 1;
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if ((so = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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{
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fprintf(stderr, "Unable to create socket: %s\n",
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strerror(errno));
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return -1;
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}
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memset(&addr, 0, sizeof addr);
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addr.sin_family = AF_INET;
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setipaddress(&addr.sin_addr, hostname);
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addr.sin_port = htons(atoi(port));
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if (connect(so, (struct sockaddr *)&addr, sizeof(addr)) < 0)
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{
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fprintf(stderr, "Unable to connect to MaxScale at %s, %s: %s\n",
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hostname, port, strerror(errno));
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close(so);
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return -1;
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}
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if (setsockopt(so, SOL_SOCKET,
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SO_KEEPALIVE, &keepalive , sizeof(keepalive )))
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perror("setsockopt");
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return so;
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}
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/**
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* Set IP address in socket structure in_addr
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*
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* @param a Pointer to a struct in_addr into which the address is written
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* @param p The hostname to lookup
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* @return 1 on success, 0 on failure
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*/
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static int
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setipaddress(struct in_addr *a, char *p)
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{
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#ifdef __USE_POSIX
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struct addrinfo *ai = NULL, hint;
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int rc;
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struct sockaddr_in * res_addr;
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memset(&hint, 0, sizeof (hint));
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hint.ai_socktype = SOCK_STREAM;
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hint.ai_flags = AI_CANONNAME;
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hint.ai_family = AF_INET;
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if ((rc = getaddrinfo(p, NULL, &hint, &ai)) != 0) {
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return 0;
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}
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/* take the first one */
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if (ai != NULL) {
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res_addr = (struct sockaddr_in *)(ai->ai_addr);
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memcpy(a, &res_addr->sin_addr, sizeof(struct in_addr));
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freeaddrinfo(ai);
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return 1;
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}
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#else
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struct hostent *h;
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spinlock_acquire(&tmplock);
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h = gethostbyname(p);
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spinlock_release(&tmplock);
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if (h == NULL) {
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if ((a->s_addr = inet_addr(p)) == -1) {
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return 0;
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}
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} else {
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/* take the first one */
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memcpy(a, h->h_addr, h->h_length);
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return 1;
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}
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#endif
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return 0;
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}
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/**
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* Perform authentication using the maxscaled protocol conventions
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*
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* @param so The socket connected to MaxScale
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* @param user The username to authenticate
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* @param password The password to authenticate with
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* @return Non-zero of succesful authentication
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*/
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static int
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authMaxScale(int so, char *user, char *password)
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{
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char buf[20];
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if (read(so, buf, 4) != 4)
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return 0;
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write(so, user, strlen(user));
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if (read(so, buf, 8) != 8)
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return 0;
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write(so, password, strlen(password));
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if (read(so, buf, 6) != 6)
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return 0;
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return strncmp(buf, "FAILED", 6);
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}
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/**
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* Send a command using the MaxScaled protocol, display the return data
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* on standard output.
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*
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* Input terminates with a line containing just the text OK
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*
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* @param so The socket connect to MaxScale
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* @param cmd The command to send
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* @return 0 if the connection was closed
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*/
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static int
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sendCommand(int so, char *cmd)
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{
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char buf[80];
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int i, j, newline = 1;
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if (write(so, cmd, strlen(cmd)) == -1)
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return 0;
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while (1)
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{
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if ((i = read(so, buf, 80)) <= 0)
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return 0;
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for (j = 0; j < i; j++)
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{
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if (newline == 1 && buf[j] == 'O')
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newline = 2;
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else if (newline == 2 && buf[j] == 'K' && j == i - 1)
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{
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return 1;
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}
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else if (newline == 2)
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{
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putchar('O');
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putchar(buf[j]);
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newline = 0;
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}
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else if (buf[j] == '\n' || buf[j] == '\r')
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{
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putchar(buf[j]);
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newline = 1;
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}
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else
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{
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putchar(buf[j]);
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newline = 0;
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}
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}
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}
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return 1;
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}
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/**
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* Read a file of commands and send them to MaxScale
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*
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* @param so The socket connected to MaxScale
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* @param file The filename
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*/
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static void
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DoSource(int so, char *file)
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{
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char *ptr, *pe;
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char line[132];
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FILE *fp;
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if ((fp = fopen(file, "r")) == NULL)
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{
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fprintf(stderr, "Unable to open command file '%s'.\n",
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file);
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return;
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}
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while ((ptr = fgets(line, 132, fp)) != NULL)
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{
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/* Strip tailing newlines */
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pe = &ptr[strlen(ptr)-1];
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while (pe >= ptr && (*pe == '\r' || *pe == '\n'))
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{
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*pe = '\0';
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pe--;
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}
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if (*ptr != '#') /* Comment */
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{
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if (! sendCommand(so, ptr))
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{
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break;
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}
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}
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}
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fclose(fp);
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return;
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}
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/**
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* Print version information
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*/
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static void
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PrintVersion(const char *progname)
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{
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printf("%s Version %s\n", progname, MAXSCALE_VERSION);
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}
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/**
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* Display the --help text.
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*/
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static void
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DoUsage(const char *progname)
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{
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PrintVersion(progname);
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printf("The MaxScale administrative and monitor client.\n\n");
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printf("Usage: %s [-u user] [-p password] [-h hostname] [-P port] [<command file> | <command>]\n\n", progname);
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printf(" -u|--user=... The user name to use for the connection, default\n");
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printf(" is admin.\n");
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printf(" -p|--password=... The user password, if not given the password will\n");
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printf(" be prompted for interactively\n");
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printf(" -h|--hostname=... The maxscale host to connecto to. The default is\n");
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printf(" localhost\n");
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printf(" -P|--port=... The port to use for the connection, the default\n");
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printf(" port is 6603.\n");
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printf(" -v|--version print version information and exit\n");
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printf(" -?|--help Print this help text.\n");
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printf("Any remaining arguments are treated as MaxScale commands or a file\n");
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printf("containing commands to execute.\n");
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}
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/**
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* Check command to see if it is a quit command
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*
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* @param buf The command buffer
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* @return Non-zero if the command should cause maxadmin to quit
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*/
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static int
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isquit(char *buf)
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{
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char *ptr = buf;
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if (!buf)
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return 0;
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while (*ptr && isspace(*ptr))
|
|
ptr++;
|
|
if (strncasecmp(ptr, "quit", 4) == 0 || strncasecmp(ptr, "exit", 4) == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Trim whitespace from the right hand end of the string
|
|
*
|
|
* @param str String to trim
|
|
*/
|
|
static void
|
|
rtrim(char *str)
|
|
{
|
|
char *ptr = str + strlen(str);
|
|
|
|
if (ptr > str) // step back from the terminating null
|
|
ptr--; // If the string has more characters
|
|
while (ptr >= str && isspace(*ptr))
|
|
*ptr-- = 0;
|
|
}
|
|
|
|
/**
|
|
* Read defaults for hostname, port, user and password from
|
|
* the .maxadmin file in the users home directory.
|
|
*
|
|
* @param hostname Pointer the hostname to be updated
|
|
* @param port Pointer to the port to be updated
|
|
* @param user Pointer to the user to be updated
|
|
* @param passwd Pointer to the password to be updated
|
|
*/
|
|
static void
|
|
read_inifile(char **hostname, char **port, char **user, char **passwd, int* editor)
|
|
{
|
|
char pathname[400];
|
|
char *home, *brkt;
|
|
char *name, *value;
|
|
FILE *fp;
|
|
char line[400];
|
|
|
|
if ((home = getenv("HOME")) == NULL)
|
|
return;
|
|
snprintf(pathname, 400, "%s/.maxadmin", home);
|
|
if ((fp = fopen(pathname, "r")) == NULL)
|
|
return;
|
|
while (fgets(line, 400, fp) != NULL)
|
|
{
|
|
rtrim(line);
|
|
if (line[0] == 0)
|
|
continue;
|
|
if (line[0] == '#')
|
|
continue;
|
|
name = strtok_r(line, "=", &brkt);
|
|
value = strtok_r(NULL, "=", &brkt);
|
|
if (name && value)
|
|
{
|
|
if (strcmp(name, "hostname") == 0)
|
|
*hostname = strdup(value);
|
|
else if (strcmp(name, "port") == 0)
|
|
*port = strdup(value);
|
|
else if (strcmp(name, "user") == 0)
|
|
*user = strdup(value);
|
|
else if (strcmp(name, "passwd") == 0)
|
|
*passwd = strdup(value);
|
|
else if (strcmp(name, "editor") == 0)
|
|
{
|
|
|
|
if(strcmp(value,"vi") == 0)
|
|
*editor = 0;
|
|
else if(strcmp(value,"emacs") == 0)
|
|
*editor = 1;
|
|
else
|
|
fprintf(stderr, "WARNING: Unrecognised "
|
|
"parameter '%s=%s' in .maxadmin file\n", name, value);
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "WARNING: Unrecognised "
|
|
"parameter '%s' in .maxadmin file\n", name);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "WARNING: Expected name=value "
|
|
"parameters in .maxadmin file but found "
|
|
"'%s'.\n", line);
|
|
}
|
|
}
|
|
fclose(fp);
|
|
}
|