267 lines
5.7 KiB
C
267 lines
5.7 KiB
C
/*
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* @(#) $Header: /tmp/cvs/mysql-admutils/common.c,v 1.9 2007-02-27 14:10:07 geirha Exp $
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*
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* functions used by mysql-dbadm.c and mysql-useradm.c
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*
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <mysql.h>
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#include <assert.h>
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#include <pwd.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <string.h>
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#include <grp.h>
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#include "mysql-admutils.h"
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char *program_name;
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static char *rcsheader = "@(#) " PACKAGE " " VERSION " orakel@ntnu.no $Header: /tmp/cvs/mysql-admutils/common.c,v 1.9 2007-02-27 14:10:07 geirha Exp $";
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int
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version()
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{
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printf("%s %s\n", program_name, rcsheader);
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exit(0);
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}
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int
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wrong_use(char *format, ...)
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{
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va_list ap;
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if (format) {
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fprintf(stderr, "%s: ", program_name);
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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putchar('\n');
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}
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fprintf(stderr, "Try `%s --help' for more information.\n", program_name);
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return 1;
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}
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/* always returns 1. */
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int
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dberror(MYSQL *pmysql, char *format, ...)
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{
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const char *errmsg;
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va_list ap;
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fprintf(stderr, "%s: ", program_name);
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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fprintf(stderr, "\n");
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if (pmysql) {
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errmsg = mysql_error(pmysql);
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if ((errmsg) && (strcmp(errmsg, "") != 0))
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fprintf(stderr, "mysql: %s\n", errmsg);
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mysql_close(pmysql);
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}
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return 1;
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}
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/* always returns 1. */
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int
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fatal_error(char *format, ...)
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{
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va_list ap;
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fprintf(stderr, "%s: ", program_name);
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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fprintf(stderr, "\n");
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return 1;
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}
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/* decides if the UNIX user is entitled to the MySQL database or MySQL user. */
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int
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owner(char *name)
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{
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struct passwd *p;
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p = getpwuid(getuid());
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if (!p) {
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dberror(NULL, "Failed to look up your UNIX username.");
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exit(1);
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}
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if (strcmp(name, p->pw_name) == 0)
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return 1; /* OK */
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if ((strncmp(name, p->pw_name, strlen(p->pw_name)) == 0) &&
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(*(name + strlen(p->pw_name)) == '_'))
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return 1; /* OK */
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return 0; /* not owner if we get as far as this */
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}
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/**
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* Decides if the user is member of a group. The Unix group can't contain any
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* '_'. i.e 'fidi_s' won't be accepted.
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*/
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int
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member(char *gr) {
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char *username;
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char group[65];
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struct group *g;
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struct passwd *p;
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char *foo;
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/* size_t i = 0; */
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/* Get username */
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p = getpwuid(getuid());
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if (!p) {
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fprintf(stderr, "Failed to look up your UNIX username.");
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return 0;
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}
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username = p->pw_name;
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/* Copy string, but cut at '_' */
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strncpy(group, gr, 64);
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group[64] = '\0';
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// ettersom man kan f<> inn gruppenavn med underscore i, m<> man rett og
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// slett pr<70>ve seg fram for <20> sjekke om det er en gruppe personen er med
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// i.
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// eksempel: www_esb_test_users, hvor personen ikke er med i www_est_test
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// (som kanskje finnes), men er med i www_esb.
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// group er databasenavnet som brukeren ville ha. Vi m<> finne gruppenavnet
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// ut av den, og stripper av en og en underscore til vi finner noe som
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// passer.
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while ( 1 ) {
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#if DEBUG
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// printf("gr = %s, group = %s, foo = %s\n", gr, group, foo);
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#endif
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g = getgrnam(group);
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#if DEBUG
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printf("tror gruppenavnet er: %s\n", group);
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#endif
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// hvis gruppen ikke finnes, m<> vi i allefall pr<70>ve <20> se om
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// det er noe lengre inn.
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if (g) {
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/* Check if user is member of group */
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while(*g->gr_mem != NULL) {
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char * member = *g->gr_mem++;
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#if DEBUG
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printf("Medlem: %s\n", member);
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#endif
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if (strcmp(member,username) == 0) {
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#if DEBUG
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printf("You have access to '%s'\n", gr);
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#endif
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return 1; /* OK */
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}
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}
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#if DEBUG
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printf("You have no access to '%s'\n", gr);
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#endif
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} // if
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// brukeren var ikke med i gruppen, s<> vi m<> pr<70>ve neste.
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// finner den siste _-en i navnet.
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foo = strrchr(group, '_');
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if (foo == NULL) {
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// hvis vi har kommet helt til bunn, og fremdeles
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// ikke har blitt avbrutt, fantes det ingen slik gruppe.
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return 0;
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}
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// det som n<> er bak siste underscore er passe uinteressant, s<>
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// vi flytter slutten av strengen litt framover.
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*foo = '\0';
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} // while
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}
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/* return a list of the user's groupnames */
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/* numgroups is the total number of groups found */
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char **get_group_names(int *numgroups)
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{
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char **grouplist;
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gid_t gids[33];
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int real_nr_groups, nr_groups, i;
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struct group *g;
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nr_groups = 0;
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nr_groups = getgroups(32, &gids[0]); /* Allow a max of 32 groups */
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if (nr_groups == -1) {
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dberror(NULL, "Error while trying to fetch group info");
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return NULL;
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}
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grouplist = malloc(33 * sizeof(char *));
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real_nr_groups = 0;
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for (i = 0; i < nr_groups; i++) {
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g = getgrgid(gids[i]);
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/* Go to next grp if it doesn't have a name */
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if (g != NULL) {
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grouplist[real_nr_groups++] = strdup(g->gr_name);
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} else {
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fprintf(stderr, "Omitting gid %d, no entry in group-file.\n", gids[i]);
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}
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}
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grouplist[real_nr_groups] = NULL;
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*numgroups = real_nr_groups;
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return grouplist;
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}
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int
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reload(MYSQL *pmysql)
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{
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return mysql_reload(pmysql);
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}
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/* same as strcpy, but returns a pointer to the end of dest instead of start */
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char *strmov(char *dest, const char *src) {
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while ((*dest++ = *src++))
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;
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return dest-1;
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}
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/* New database and user names may only use these characters in their
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identifier */
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const char name_validchars[] =
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"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-";
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/* Returns true if dbname contains only characters in name_validchars. */
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int name_isclean(char* name) {
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int reallen, cleanlen;
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reallen = strlen(name);
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cleanlen = strspn(name, name_validchars);
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return (reallen == cleanlen);
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}
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