mysql-admutils/common.c

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