678 lines
18 KiB
C
678 lines
18 KiB
C
/*
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* @(#) $Header: /home/stud/admin/cvs/mysql-admutils/mysql-dbadm.c,v 1.20 2007/06/04 08:40:54 geirha Exp $
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*
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* mysql-dbadm.c
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*
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*/
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#include "config.h"
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#include "mysql-admutils.h"
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#include <stdio.h>
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#include <string.h>
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#include <mysql.h>
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#include <assert.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <pwd.h>
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#include <grp.h>
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#include <sys/types.h>
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#include <unistd.h>
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/* New database names may only use these characters in their identifier */
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const char dbname_validchars[] =
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"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-";
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/* Returns true if dbname contains only characters in dbname_validchars. */
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int dbname_isclean(char* dbname) {
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int reallen, cleanlen;
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reallen = strlen(dbname);
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cleanlen = strspn(dbname, dbname_validchars);
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return (reallen == cleanlen);
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}
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char *
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strchr_whitespace(const char *s)
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{
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char *sp, *tab;
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sp = strchr(s, ' ');
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tab = strchr(s, '\t');
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if (sp == NULL)
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return tab;
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if (tab == NULL)
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return sp;
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return sp < tab ? sp : tab; /* if both are found, return the first one */
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}
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char *
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strtok_whitespace(char *s)
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{
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static char *cp;
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char *r;
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r = s ? s : cp;
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if (r == NULL)
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return NULL;
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cp = strchr_whitespace(r);
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if (cp == NULL)
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return r;
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while ((*cp == ' ') || (*cp == '\t'))
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*cp++ = '\0';
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return r;
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}
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int
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valid_priv(const char *s)
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{
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if (s == NULL) return 0;
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#define ACCEPT(x) if (strcmp(s, x) == 0) return 1
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ACCEPT("Y");
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ACCEPT("N");
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ACCEPT("y");
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ACCEPT("n");
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#undef ACCEPT
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return 0; /* not a valid priv */
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}
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int
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usage()
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{
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printf("Usage: %s COMMAND [DATABASE]...\n", program_name);
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printf("Create, drop og edit permission for the DATABASE(s),\n");
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printf("as determined by the COMMAND. Valid COMMANDs:\n");
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printf("\n");
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printf(" create create the DATABASE(s).\n");
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printf(" drop delete the DATABASE(s).\n");
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printf(" show give information about the DATABASE(s), or, if\n");
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printf(" none are given, all the ones you own.\n");
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printf(" editperm change permissions for the DATABASE(s). Your\n");
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printf(" favorite editor will be started, allowing you\n");
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printf(" to make changes to the permission table.\n");
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printf(" Run '%s --help-editperm' for more\n"
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" information.\n",program_name);
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printf("\n");
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printf("Report bugs to drift@stud.ntnu.no\n");
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return 0;
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}
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int
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usage_editperm()
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{
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printf("Usage: %s editperm [DATABASE]\n", program_name);
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printf("Edit permissions for the DATABASE. Running this command will\n");
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printf("spawn the editor stored in the $EDITOR environment variable.\n");
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printf("(pico will be used if the variable is unset)\n");
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printf("\n");
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printf("The file should contain one line per user, starting with the\n");
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printf("username and followed by ten Y/N-values seperated by whitespace.\n");
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printf("Lines starting with # are ignored.\n");
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printf("\n");
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printf("The Y/N-values corresponds to the following mysql privileges:\n");
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printf(" Select - Enables use of SELECT\n");
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printf(" Insert - Enables use of INSERT\n");
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printf(" Update - Enables use of UPDATE\n");
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printf(" Delete - Enables use of DELETE\n");
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printf(" Create - Enables use of CREATE TABLE\n");
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printf(" Drop - Enables use of DROP TABLE\n");
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printf(" Alter - Enables use of ALTER TABLE\n");
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printf(" Index - Enables use of CREATE INDEX and DROP INDEX\n");
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printf(" Temp - Enables use of CREATE TEMPORARY TABLE\n");
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printf(" Lock - Enables use of LOCK TABLE\n");
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printf("\n");
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printf("Report bugs to drift@stud.ntnu.no\n");
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return 0;
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}
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int
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create(MYSQL *pmysql, char *db)
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{
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// hvis man fors<72>ker <20> dra mysql_create_db() p<> en database som
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// allerede finnes, s<> henger bare hele sql-kallet. Vi m<> derfor
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// fors<72>ke <20> selecte databasen f<>rst. Ettersom man alltid er root,
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// g<>r jo dette vanligvis bra.
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// finner ut om denne finnes fra f<>r.
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if (!mysql_select_db(pmysql, db)) {
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return dberror(pmysql, "Database '%s' already exists.", db);
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}
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mysql_select_db(pmysql, "mysql");
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// oppretter databasen.
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char query[1024], *end;
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end = strmov(query, "CREATE DATABASE `");
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end += mysql_real_escape_string(pmysql, end, db, strlen(db));
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*end++ = '`';
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*end = '\0';
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#ifdef DEBUG
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printf("query: %s\n", query);
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#endif
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if (mysql_query(pmysql, query))
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return dberror(pmysql, "Cannot create database '%s'.", db);
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fprintf(stderr, "Database '%s' created.\n", db);
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return 0;
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}
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int
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drop(MYSQL *pmysql, char *db)
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{
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char query[1024], *end;
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end = strmov(query, "DELETE FROM db WHERE db = '");
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end += mysql_real_escape_string(pmysql, end, db, strlen(db));
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*end++ = '\'';
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*end = '\0';
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#ifdef DEBUG
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printf("query: %s\n", query);
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#endif
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if (mysql_query(pmysql, query))
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dberror(pmysql, "Failed to delete permissions for database '%s'.", db);
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if (mysql_select_db(pmysql, db)) {
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dberror(pmysql, "Database '%s' doesn't exists.", db);
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return 0;
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}
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mysql_select_db(pmysql, "mysql");
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end = strmov(query, "DROP DATABASE `");
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end += mysql_real_escape_string(pmysql, end, db, strlen(db));
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*end++ = '`';
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*end = '\0';
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#ifdef DEBUG
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printf("query: %s\n", query);
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#endif
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if (mysql_query(pmysql, query))
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return dberror(pmysql, "Cannot drop database '%s'.", db);
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fprintf(stderr, "Database '%s' dropped.\n", db);
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return 0;
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}
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/* return a list of the user's databases */
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char **
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list(MYSQL *pmysql)
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{
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char *wild;
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char **usr_groups, **cp; /* holds all group names this dude is a member of [tlan]*/
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MYSQL_RES *res;
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int rows, numgroups, numgroupdbs;
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MYSQL_ROW row;
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char **dblist;
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int i, counter;
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struct passwd *p;
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// variabler som brukes til <20> escape gruppenavnet til mysqlvennlig format.
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char escaped_user[64];
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char *cp_kopi;
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p = getpwuid(getuid());
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if (!p) {
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dberror(NULL, "Failed to lookup your UNIX username.");
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exit(1);
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}
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dblist = malloc(2 * sizeof(char*)); /* one for username (if used), rest is done below */
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numgroupdbs = 0;
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counter = 0;
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usr_groups = get_group_names(&numgroups);
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cp = usr_groups;
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while (*cp) { // itererer over alle grupper en person er med i
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if (*cp == NULL)
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break;
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#ifdef DEBUG
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printf("cp er %s\n", *cp);
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#endif
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escaped_user[0] = '\0';
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cp_kopi=*cp;
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// itererer over bokstavene i gruppenavn, og escaper spesialtegn.
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for(i=0; i<=strlen(cp_kopi); i++) {
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// hvis % _ , s<> skriv \ og s<> tegn
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if ((cp_kopi[i] == '_') || (cp_kopi[i] == '%')) {
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strcat(escaped_user, "\\");
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}
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escaped_user[strlen(escaped_user) + 1] = '\0';
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escaped_user[strlen(escaped_user)] = cp_kopi[i];
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} // for
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wild = malloc(strlen(escaped_user)+4);
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sprintf(wild, "%s\\_%%", escaped_user);
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#ifdef DEBUG
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printf("dbadm: wildcard: '%s'\n", wild);
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#endif
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res = mysql_list_dbs(pmysql, wild);
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rows = mysql_num_rows(res);
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if (rows > 0) {
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numgroupdbs += rows;
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dblist = realloc(dblist, (numgroupdbs+2) * sizeof(char *));
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for (i = 0; i < rows; i++) {
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if ((row = mysql_fetch_row(res))) {
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dblist[counter++] = strdup(row[0]);
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}
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}
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}
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free(wild);
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mysql_free_result(res);
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cp++;
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}
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wild = malloc(strlen(p->pw_name) + 4);
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sprintf(wild, "%s\\_%%", p->pw_name);
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#ifdef DEBUG
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printf("dbadm: wildcard: '%s'\n", wild);
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#endif
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res = mysql_list_dbs(pmysql, wild);
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rows = mysql_num_rows(res);
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dblist = realloc(dblist, (numgroupdbs+rows+2) * sizeof(char *));
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if (!dblist) {
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dberror(NULL, "Out of memory.\n");
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free(wild);
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return NULL;
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}
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for (i = 0; i < rows; i++) {
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if ((row = mysql_fetch_row(res))) {
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dblist[counter++] = strdup(row[0]);
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}
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}
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mysql_free_result(res);
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res = mysql_list_dbs(pmysql, p->pw_name);
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rows = mysql_num_rows(res);
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if (rows == 1)
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dblist[counter++] = strdup(p->pw_name);
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dblist[counter] = NULL;
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mysql_free_result(res);
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free(wild);
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for (i=0;i<numgroups;i++)
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free(usr_groups[i]);
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free(usr_groups);
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return dblist;
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}
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int
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writeperm(FILE *f, MYSQL *pmysql, const char *db)
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{
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char query[2048], *end;
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MYSQL_RES *res;
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int rows, i;
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MYSQL_ROW row;
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end = strmov(query, "SELECT user,select_priv,insert_priv,update_priv,"
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"delete_priv,create_priv,drop_priv,"
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"alter_priv,index_priv,"
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"create_tmp_table_priv,lock_tables_priv "
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"FROM db WHERE db = '");
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end += mysql_real_escape_string(pmysql, end, db, strlen(db));
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*end++ = '\'';
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*end = '\0';
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#ifdef DEBUG
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printf("query: %s\n", query);
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#endif
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if (mysql_query(pmysql, query))
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return dberror(pmysql, "Query for permissions failed.");
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res = mysql_store_result(pmysql);
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rows = mysql_num_rows(res);
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fprintf(f, "# User "
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"Select Insert Update Delete Create Drop Alter Index "
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" Temp Lock\n");
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fprintf(f, "# ---------------- "
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"------ ------ ------ ------ ------ ---- ----- ----- "
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" ---- ----\n");
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if (rows == 0)
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fprintf(f, "# (no permissions currently granted to any users)\n");
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else {
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for (i = 0; i < rows; i++) {
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row = mysql_fetch_row(res);
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fprintf(f, " %-16s %-7s %-7s %-7s %-7s %-7s %-7s %-7s %-7s %-7s %s\n",
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row[0], row[1], row[2], row[3], row[4], row[5], row[6], row[7], row[8], row[9], row[10]);
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}
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}
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mysql_free_result(res);
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return 0;
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}
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/* show information about the database */
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int
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show(MYSQL *pmysql, const char *db)
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{
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printf("Database '%s':\n", db);
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writeperm(stdout, pmysql, db);
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return 0;
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}
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#define MAX_GRANTS 1024
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int
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editperm(MYSQL *pmysql, const char *db)
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{
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char fn[] = "/tmp/mysql-dbadm.tmp.XXXXXX";
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FILE *f;
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char *editor;
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char cmd[1024]; /* shell command for editing the file */
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char line[1024]; /* buffer to hold one line */
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char *cp; /* used to interate through a line */
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char *user, *select_priv, *insert_priv, *update_priv, *delete_priv,
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*create_priv, *drop_priv, *alter_priv, *index_priv, *create_tmp_table_priv,
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*lock_tables_priv;
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char query[4096], *end; /* used to build a query */
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char *queries[MAX_GRANTS]; /* insert queries */
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int lines; /* number of grant lines processed */
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int i; /* iterate through lines[] */
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int fd = mkstemp(fn);
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if (fd == -1)
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return dberror(NULL, "Cannot create a unique temporary file name.");
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f = fdopen(fd, "w");
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if (f == NULL)
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return dberror(NULL, "Failed to open temporary file %s.", fn);
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writeperm(f, pmysql, db);
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fclose(f);
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editor = getenv("EDITOR");
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if (!editor)
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editor = "pico"; /* OK since editor won't be freed */
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strcpy(cmd, editor);
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strcat(cmd, " ");
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strcat(cmd, fn);
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if (system(cmd) == -1) {
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dberror(NULL, "Failed to execute '%s'\n", cmd);
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perror("system");
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return 1;
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}
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/* parse */
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f = fopen(fn, "r");
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lines = 0;
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while (fgets(line, sizeof(line), f)) {
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cp = strchr(line, '\n');
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if (cp)
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*cp = '\0';
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cp = line;
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while (*cp && ((*cp == ' ') || (*cp == '\t'))) cp++;
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if (*cp == '\0') continue;
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if (*cp == '#') continue;
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if (*cp == '\n') continue;
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#define STRTOK_WHITESPACE(res, start) \
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{ if (!(res = strtok_whitespace(start))) continue; }
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STRTOK_WHITESPACE(user, cp);
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if (strlen(user) < 1)
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return dberror(NULL, "Invalid user '%s' in grant line %d.", user,
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lines + 1);
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if (strcmp(user, "%") == 0)
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*user = '\0'; /* ugly, but it works... */
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#define CHECK_PRIV(PRIV) \
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if (!valid_priv(PRIV)) return dberror(NULL, "Invalid value '%s' " \
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"in grant line %d.\nMake sure you fill in a value (Y or N) for " \
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"all ten privileges.\nRun '%s --help-editerm' for more " \
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"information.\nNo permissions have been set.", PRIV, lines + 1, \
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program_name)
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STRTOK_WHITESPACE(select_priv, NULL);
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CHECK_PRIV(select_priv);
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STRTOK_WHITESPACE(insert_priv, NULL);
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CHECK_PRIV(insert_priv);
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STRTOK_WHITESPACE(update_priv, NULL);
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CHECK_PRIV(update_priv);
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STRTOK_WHITESPACE(delete_priv, NULL);
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CHECK_PRIV(delete_priv);
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STRTOK_WHITESPACE(create_priv, NULL);
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CHECK_PRIV(create_priv);
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STRTOK_WHITESPACE(drop_priv, NULL);
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CHECK_PRIV(drop_priv);
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STRTOK_WHITESPACE(alter_priv, NULL);
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CHECK_PRIV(alter_priv);
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STRTOK_WHITESPACE(index_priv, NULL);
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CHECK_PRIV(index_priv);
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STRTOK_WHITESPACE(create_tmp_table_priv, NULL);
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CHECK_PRIV(create_tmp_table_priv);
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STRTOK_WHITESPACE(lock_tables_priv, NULL);
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CHECK_PRIV(lock_tables_priv);
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#undef STRTOK_WHITESPACE
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#undef CHECK_PRIV
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end = strmov(query, "INSERT INTO db ("
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"host,db,user,select_priv,insert_priv,"
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"update_priv,delete_priv,create_priv,"
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"drop_priv,alter_priv,index_priv,"
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"create_tmp_table_priv,lock_tables_priv"
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") VALUES (");
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end = strmov(end, "'%'");
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#define APPEND(VAR) {\
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*end++ = ',';\
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*end++ = '\'';\
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end += mysql_real_escape_string(pmysql, end, VAR, strlen(VAR));\
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*end++ = '\'';\
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}
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APPEND(db);
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APPEND(user);
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APPEND(select_priv);
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APPEND(insert_priv);
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APPEND(update_priv);
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APPEND(delete_priv);
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APPEND(create_priv);
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APPEND(drop_priv);
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APPEND(alter_priv);
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APPEND(index_priv);
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APPEND(create_tmp_table_priv);
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APPEND(lock_tables_priv);
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*end++ = ')';
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*end = '\0';
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#undef APPEND
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queries[lines] = strdup(query);
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lines++;
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if (lines >= MAX_GRANTS)
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{
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dberror(NULL, "Warning: Maximum of %d grants reached.\n",
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MAX_GRANTS);
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continue;
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}
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||
} /* while fgets ... */
|
||
|
||
unlink(fn);
|
||
fclose(f);
|
||
|
||
/* now that we have checked the input for errors, we can safely
|
||
delete the old grants from the database and insert the new ones. */
|
||
|
||
end = strmov(query, "DELETE FROM db WHERE db = '");
|
||
end += mysql_real_escape_string(pmysql, end, db, strlen(db));
|
||
*end++ = '\'';
|
||
*end = '\0';
|
||
#ifdef DEBUG
|
||
printf("query: %s\n", query);
|
||
#endif
|
||
if (mysql_query(pmysql, query))
|
||
dberror(pmysql, "Failed to delete old grants for '%s'.", db);
|
||
|
||
for (i = 0; i < lines; i++)
|
||
{
|
||
#ifdef DEBUG
|
||
puts(queries[i]);
|
||
putchar('\n');
|
||
#endif
|
||
if (mysql_query(pmysql, queries[i]))
|
||
dberror(pmysql, "Failed to insert grant line %d.", i + 1);
|
||
free(queries[i]);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
int
|
||
main(int argc, char *argv[])
|
||
{
|
||
int i;
|
||
enum { c_create, c_drop, c_editperm, c_show } command;
|
||
MYSQL mysql;
|
||
mysql_init(&mysql);
|
||
char **dblist, **p;
|
||
char *db;
|
||
|
||
program_name = argv[0];
|
||
|
||
for (i = 1; i < argc; i++)
|
||
if (strcmp(argv[i], "--help") == 0)
|
||
return usage();
|
||
for (i = 1; i < argc; i++)
|
||
if (strcmp(argv[i], "--help-editperm") == 0)
|
||
return usage_editperm();
|
||
for (i = 1; i < argc; i++)
|
||
if (strcmp(argv[i], "--version") == 0)
|
||
return version();
|
||
|
||
if (argc < 2)
|
||
return wrong_use(NULL);
|
||
|
||
#ifdef DEBUG
|
||
printf("NB NB NB: denne versjonen av programmet er kompilert med -DDEBUG, og\n");
|
||
printf("kan komme til <20> skrive ut ekstra informasjon. Dette er ikke farlig,\n");
|
||
printf("og programmet b<>r virke som vanlig.\n");
|
||
#endif
|
||
|
||
|
||
/* check that the supplied command is valid */
|
||
|
||
if (strcmp(argv[1], "create") == 0)
|
||
command = c_create;
|
||
else if (strcmp(argv[1], "drop") == 0)
|
||
command = c_drop;
|
||
else if (strcmp(argv[1], "editperm") == 0)
|
||
command = c_editperm;
|
||
else if (strcmp(argv[1], "show") == 0)
|
||
command = c_show;
|
||
else
|
||
return wrong_use("unrecognized command"); /* XXX */
|
||
|
||
/* all other than show requires at least one DATABASE argument. */
|
||
if ((command != c_show) && (argc < 3))
|
||
return wrong_use(NULL);
|
||
|
||
read_config_file();
|
||
|
||
/* connect to the database server and select the mysql database */
|
||
if (!mysql_real_connect(&mysql, db_server, db_user, db_passwd, db_name, 0, NULL, 0))
|
||
return dberror(&mysql, "Cannot connect to database server '%s'.",
|
||
db_server);
|
||
if (mysql_select_db(&mysql, db_name))
|
||
return dberror(&mysql, "Cannot select database '%s'.", db_name);
|
||
|
||
if ((command == c_show) && (argc == 2)) {
|
||
dblist = list(&mysql);
|
||
p = dblist;
|
||
while (*p) {
|
||
show(&mysql, *p);
|
||
free(*p);
|
||
p++;
|
||
}
|
||
free(*p);
|
||
free(dblist);
|
||
}
|
||
else {
|
||
db = malloc(64);
|
||
/* for each supplied database name, perform the requested action */
|
||
for (i = 2; i < argc; i++) {
|
||
// HE HE
|
||
strncpy(db, argv[i], 32);
|
||
db[32] = '\0';
|
||
|
||
if (! (owner(db) || member(db))) {
|
||
if (command == c_create)
|
||
dberror(NULL,"Unable to create mysql-database '%s'.\n"
|
||
"A mysql-database must start with either '%s_' or "
|
||
"'groupname_', where groupname is a unix group you are a "
|
||
"member of. Type \"groups\" to see which groups you are a "
|
||
"member of.\n",
|
||
db, getpwuid(getuid())->pw_name);
|
||
else
|
||
dberror(NULL, "You are not in charge of mysql-database: '%s'. Skipping.", db);
|
||
continue;
|
||
}
|
||
|
||
switch (command) {
|
||
case c_create:
|
||
// We only check newly created databases. Many old ("unclean") databases are still in use.
|
||
if(dbname_isclean(db)) {
|
||
create(&mysql, db);
|
||
} else {
|
||
dberror(NULL, "Database name '%s' contains invalid characters.\n"
|
||
"Only A-Z, a-z, 0-9, _ (underscore) and - (dash) permitted. Skipping.", db);
|
||
}
|
||
break;
|
||
case c_drop:
|
||
if(dbname_isclean(db)) {
|
||
drop(&mysql, db);
|
||
} else {
|
||
dberror(NULL, "Database name '%s' contains invalid characters.\n"
|
||
"Only A-Z, a-z, 0-9, _ (underscore) and - (dash) permitted. Skipping.", db);
|
||
}
|
||
break;
|
||
case c_editperm:
|
||
if(dbname_isclean(db)) {
|
||
editperm(&mysql, db);
|
||
} else {
|
||
dberror(NULL, "Database name '%s' contains invalid characters.\n"
|
||
"Only A-Z, a-z, 0-9, _ (underscore) and - (dash) permitted. Skipping.", db);
|
||
}
|
||
break;
|
||
case c_show:
|
||
if(dbname_isclean(db)) {
|
||
show(&mysql, db);
|
||
} else {
|
||
dberror(NULL, "Database name '%s' contains invalid characters.\n"
|
||
"Only A-Z, a-z, 0-9, _ (underscore) and - (dash) permitted. Skipping.", db);
|
||
}
|
||
break;
|
||
default:
|
||
return dberror(NULL, "This point should never be reached!");
|
||
}
|
||
} // for
|
||
free(db);
|
||
} // else
|
||
|
||
mysql_reload(&mysql);
|
||
mysql_close(&mysql);
|
||
|
||
return 0;
|
||
}
|