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mysql-admutils/mysql-useradm.c

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/*
* @(#) $Header: /tmp/cvs/mysql-admutils/mysql-useradm.c,v 1.12 2011-09-22 12:17:18 geirha Exp $
*
* mysql-useradm.c
*
*/
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <pwd.h>
#include <sys/types.h>
#include <unistd.h>
#include <mysql.h>
#include "mysql-admutils.h"
int
usage()
{
printf("Usage: %s COMMAND [USER]...\n", program_name);
printf("Create, delete or change password for the USER(s),\n");
printf("as determined by the COMMAND. Valid COMMANDs:\n");
printf("\n");
printf(" create create the USER(s).\n");
printf(" delete delete the USER(s).\n");
printf(" passwd change the MySQL password for the USER(s).\n");
printf(" show give information about the USERS(s), or, if\n");
printf(" none are given, all the users you have.\n");
printf("\n");
printf("Report bugs to drift@stud.ntnu.no\n");
return 0;
}
int
is_password_set(MYSQL *pmysql, const char *user)
{
char query[1024], *end;
MYSQL_RES *res;
int rows;
MYSQL_ROW row;
int check = 0;
end = strmov(query, "SELECT password FROM user WHERE user='");
end += mysql_real_escape_string(pmysql, end, user, strlen(user));
*end++ = '\'';
*end = '\0';
if (mysql_query(pmysql, query))
dberror(pmysql, "Failed to look up password for user '%s'.", user);
res = mysql_store_result(pmysql);
rows = mysql_num_rows(res);
if (rows > 1)
{
mysql_free_result(res);
return dberror(NULL, "Query for password for user '%s' gave %d results!",
user, rows);
}
else if (rows < 1) {
mysql_free_result(res);
return -1;
}
row = mysql_fetch_row(res);
check = (row[0] && (strlen(row[0]) > 0));
mysql_free_result(res);
return check;
}
int
create(MYSQL *pmysql, const char *user)
{
char query[1024], *end;
end = strmov(query, "INSERT INTO user (host, user) VALUES ('%', '");
end += mysql_real_escape_string(pmysql, end, user, strlen(user));
end = strmov(end, "')");
if (mysql_query(pmysql, query))
return dberror(pmysql, "Failed to create user '%s'.", user);
return 0;
}
int
delete(MYSQL *pmysql, const char *user)
{
char query[1024], *end;
end = strmov(query, "DELETE FROM user WHERE user='");
end += mysql_real_escape_string(pmysql, end, user, strlen(user));
*end++ = '\'';
*end = '\0';
if (mysql_query(pmysql, query))
return dberror(pmysql, "Failed to delete user '%s'.", user);
return 0;
}
int
passwd(MYSQL *pmysql, const char *user)
{
char prompt[1024];
char query[1024], *end;
char *password, *confirm_password;
if (is_password_set(pmysql, user) == -1) /* no such mysql user */
return dberror(NULL, "User '%s' does not exist."
" You must create it first.\n", user);
sprintf(prompt, "New MySQL password for user '%s': ", user);
password = getpass(prompt);
confirm_password = strdup(password);
sprintf(prompt, "Retype new MySQL password for user '%s': ", user);
password = getpass(prompt);
if (strcmp(password, confirm_password) != 0)
{
free(confirm_password);
return dberror(NULL, "Sorry, passwords do not match.");
}
free(confirm_password);
end = strmov(query, "UPDATE user SET password = PASSWORD('");
end += mysql_real_escape_string(pmysql, end, password, strlen(password));
end = strmov(end, "') WHERE user='");
end += mysql_real_escape_string(pmysql, end, user, strlen(user));
*end++ = '\'';
*end = '\0';
if (mysql_query(pmysql, query))
return dberror(pmysql, "Failed to set new password for user '%s'.", user);
if (mysql_affected_rows(pmysql) != 1)
dberror(NULL, "%d rows affected by password update for user '%s'!",
mysql_affected_rows(pmysql), user);
fprintf(stderr, "Password updated for user '%s'.\n", user);
return 0;
}
int
show(MYSQL *pmysql, const char *user)
{
switch (is_password_set(pmysql, user))
{
case -1:
break;
case 0:
printf("User '%s': ", user);
printf("no password set.\n");
break;
case 1:
printf("User '%s': ", user);
printf("password set.\n");
break;
}
return 0;
}
/* return a list of the user's databases */
char **
list(MYSQL *pmysql)
{
char query[4096], *end;
char **usrgroups, **cp;
MYSQL_RES *res;
int rows, numgroups;
MYSQL_ROW row;
char **userlist;
int i;
struct passwd *p;
p = getpwuid(getuid());
end = strmov(query, "SELECT user FROM user WHERE user='");
end += mysql_real_escape_string(pmysql, end, p->pw_name, strlen(p->pw_name));
end = strmov(end, "' OR user LIKE '");
end += mysql_real_escape_string(pmysql, end, p->pw_name, strlen(p->pw_name));
end = strmov(end, "\\_%'");
numgroups = 0;
usrgroups = get_group_names(&numgroups);
cp = usrgroups;
while (*cp) {
end = strmov(end, " OR user='");
end += mysql_real_escape_string(pmysql, end, *cp, strlen(*cp));
end = strmov(end, "' OR user LIKE '");
end += mysql_real_escape_string(pmysql, end, *cp, strlen(*cp));
end = strmov(end, "\\_%'");
free(*cp);
cp++;
}
free(usrgroups);
#ifdef DEBUG
printf("about to run query: %s\n", query);
#endif
if (mysql_query(pmysql, query))
{
dberror(pmysql, "Failed to look up %s's users.", p->pw_name);
return NULL;
}
res = mysql_store_result(pmysql);
rows = mysql_num_rows(res);
userlist = malloc((rows + 1) * sizeof(char *));
if (!userlist)
{
dberror(NULL, "%s: Out of memory.\n", program_name);
return NULL;
}
for (i = 0; i < rows; i++)
if ((row = mysql_fetch_row(res)))
{
userlist[i] = strdup(row[0]);
}
userlist[i] = NULL;
mysql_free_result(res);
return userlist;
}
int
main(int argc, char *argv[])
{
int i;
enum { c_create, c_delete, c_passwd, c_show } command;
MYSQL mysql;
mysql_init(&mysql);
char **dblist, **p;
char user[65];
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], "--version") == 0)
return version();
#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
if (argc < 2)
return wrong_use(NULL);
/* check that the supplied command is valid */
if (strcmp(argv[1], "create") == 0)
command = c_create;
else if (strcmp(argv[1], "delete") == 0)
command = c_delete;
else if (strcmp(argv[1], "passwd") == 0)
command = c_passwd;
else if (strcmp(argv[1], "show") == 0)
command = c_show;
else
return wrong_use("unrecognized command '%s'.", argv[1]); /* XXX */
/* all other than show requires at least one USER 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(dblist);
}
else {
/* for each supplied database name, perform the requested action */
for (i = 2; i < argc; i++) {
strncpy(user, argv[i], 32);
user[33] = '\0';
if (! (owner(user) || member(user)))
{
if (command == c_create)
dberror(NULL,"Unable to create mysql-user '%s'.\n"
"A mysql-user 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",
user, getpwuid(getuid())->pw_name);
else
dberror(NULL, "You are not in charge of mysql-user: '%s'. Skipping.", user);
continue;
}
switch (command)
{
case c_create:
create(&mysql, user);
break;
case c_delete:
delete(&mysql, user);
break;
case c_passwd:
passwd(&mysql, user);
break;
case c_show:
show(&mysql, user);
break;
default:
fprintf(stderr, "This point should never be reached.\n");
exit(1);
}
}
}
reload(&mysql);
mysql_close(&mysql);
return 0;
}
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