static void make_filename(const char* name)
{
if (strchr(name, '/') != 0)
respond("DUsername contains an illegal character");
if (!str_copy2s(&filename, CRONTAB_DIR "/", name))
respond("ZCould not produce filename");
}
void make_username(const char* start, ssize_t len, const char* msgprefix)
{
str_copyb(&username, start, len);
if (local_name && str_findfirst(&username, AT) < 0) {
str_catc(&username, AT);
str_cats(&username, local_name);
}
str_copy2s(&msgstr, msgprefix, username.s);
log_line(msgstr.s, msgstr.len);
}
const char* temppath(const char* prefix, str* path)
{
struct timeval tv;
gettimeofday(&tv, 0);
if (!str_copy2s(path, prefix, ".tmp.barch.") ||
!str_catu(path, pid) ||
!str_catc(path, '.') ||
!str_catu(path, tv.tv_sec) ||
!str_catc(path, '.') ||
!str_catuw(path, tv.tv_usec, 6, '0'))
die_oom(1);
return path->s;
}
const char* getprotoenv(const char* name)
{
static str fullname;
const char* env;
if (proto == 0)
if ((proto = getenv("PROTO")) == 0)
proto = "TCP";
if (name == 0 || *name == 0)
return proto;
wrap_str(str_copy2s(&fullname, proto, name));
if ((env = getenv(fullname.s)) != 0
&& env[0] == 0)
env = 0;
return env;
}
int main(int argc, char* argv[])
{
str packet = {0,0,0};
const char* s;
uid_t euid = -1;
const struct passwd* pw;
if (chdir_bcron() != 0)
respond("ZCould not change directory");
if (argc > 1)
fixup_argv = argv + 1;
if ((s = ucspi_protocol()) == 0
|| (strcmp(s, "UNIX") != 0 && strcmp(s, "LOCAL") != 0)
|| (s = ucspi_getenv("REMOTEEUID")) == 0
|| (euid = strtoul(s, (char**)&s, 0)) == (unsigned)-1
|| *s != 0)
respond("DConfiguration error: must be run from unixserver");
if (!ibuf_getnetstring(&inbuf, &packet)
|| packet.len < 2)
respond("ZInvalid input data or read error");
/* Look up and validate username */
username = packet.s + 1;
if ((pw = getpwnam(username)) == 0)
respond("DInvalid or unknown username");
if (euid != 0 && euid != pw->pw_uid)
respond("DUsername does not match invoking UID");
if (!str_copy2s(&filename, CRONTAB_DIR "/", pw->pw_name))
respond("ZCould not produce filename");
logcmd(packet.s[0]);
/* Execute the command. */
switch (packet.s[0]) {
case 'S': cmd_store(&packet); break;
case 'L': cmd_list(); break;
case 'R': cmd_remove(); break;
case 'Y':
if (euid != 0 && euid != getuid())
respond("DOnly root or cron can list system crontabs");
cmd_listsys();
break;
}
respond("DInvalid command code");
return 0;
}
static void load_keys(const char* server)
{
str path = {0,0,0};
wrap_str(str_copy4s(&path, keydir, "/servers/", server, "."));
if (!keylist_load_multi(&server_publics, path.s, 0) &&
!keylist_load_multi(&server_publics, "server.", 0))
die1sys(1, "Could not load server keys");
if (!keylist_load_multi(&client_secrets, "", 0)) {
wrap_str(str_copy2s(&path, keydir, "/"));
if (!keylist_load_multi(&client_secrets, path.s, 0))
die1sys(1, "Could not load sender keys");
}
if (!keylist_exchange_all(&shared_secrets, &server_publics, &client_secrets))
die1(1, "No server keys matched any sender keys");
str_free(&path);
}
