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Server : Apache System : Linux profile 3.10.0-1160.88.1.el7.x86_64 #1 SMP Tue Mar 7 15:41:52 UTC 2023 x86_64 User : apache ( 48) PHP Version : 8.0.28 Disable Function : NONE Directory : /Data/.backup/script/fcron-3.2.0/ |
/*
* FCRON - periodic command scheduler
*
* Copyright 2000-2014 Thibault Godouet <fcron@free.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* The GNU General Public License can also be found in the file
* `LICENSE' that comes with the fcron source distribution.
*/
/* This file contains all fcron's code (server) to handle communication with fcrondyn */
#include "fcron.h"
#include "socket.h"
#include "getloadavg.h"
#include "database.h"
#include "fcronconf.h"
void remove_connection(struct fcrondyn_cl **client,
struct fcrondyn_cl *prev_client);
void exe_cmd(struct fcrondyn_cl *client);
#ifdef SO_PEERCRED /* linux */
void auth_client_so_peercred(struct fcrondyn_cl *client);
#elif defined(HAVE_GETPEERUCRED) || defined(HAVE_GETPEEREID) /* resp. solaris 10 and Free/OpenBSD) */
void auth_client_getpeer(struct fcrondyn_cl *client);
#endif
void auth_client_password(struct fcrondyn_cl *client);
void cmd_ls(struct fcrondyn_cl *client, long int *cmd, int fd, int is_root);
void print_fields(int fd, unsigned char *details);
void print_line(int fd, struct cl_t *line, unsigned char *details, pid_t pid,
int index, time_t until);
void cmd_on_exeq(struct fcrondyn_cl *client, long int *cmd, int fd,
int is_root);
void cmd_renice(struct fcrondyn_cl *client, long int *cmd, int fd, exe_t * e,
int is_root);
void cmd_send_signal(struct fcrondyn_cl *client, long int *cmd, int fd,
exe_t * e);
void cmd_run(struct fcrondyn_cl *client, long int *cmd, int fd, int is_root);
void add_to_select_set(int fd, fd_set * set, int *max_fd);
void remove_from_select_set(int fd, fd_set * set, int *max_fd);
fcrondyn_cl *fcrondyn_cl_base; /* list of connected fcrondyn clients */
int fcrondyn_cl_num = 0; /* number of fcrondyn clients currently connected */
fd_set read_set; /* client fds list : cmd waiting ? */
fd_set master_set; /* master set : needed since select() modify read_set */
int set_max_fd = 0; /* needed by select() */
int listen_fd = -1; /* fd which catches incoming connection */
int auth_fail = 0; /* number of auth failure */
time_t auth_nofail_since = 0; /* we refuse auth since x due to too many failures */
/* some error messages ... */
char err_no_err_str[] = "Command successfully completed.\n";
char err_unknown_str[] =
"Fcron has encountered an error : command not completed.\n";
char err_cmd_unknown_str[] = "Unknown command.\n";
char err_job_nfound_str[] = "No corresponding job found.\n";
char err_rjob_nfound_str[] =
"No corresponding running job found.\n (The job may have "
"just finished its execution.)\n";
char err_invalid_user_str[] = "Invalid user : unable to find a passwd entry.\n";
char err_invalid_args_str[] = "Invalid arguments.\n";
char err_job_nallowed_str[] = "You are not allowed to see/change this line.\n";
char err_all_nallowed_str[] = "You are not allowed to list all jobs.\n";
char err_others_nallowed_str[] =
"You are not allowed to list other users' jobs.\n";
/* Send an error message to fcrondyn */
#define Send_err_msg(FD, MSG) \
send(FD, MSG, sizeof(MSG), 0);
/* to tell fcrondyn there's no more data to wait */
#define Tell_no_more_data(FD) \
send(FD, END_STR, sizeof(END_STR), 0);
/* Send an error message to fcrondyn and return */
#define Send_err_msg_end(FD, MSG) \
{ \
send(FD, MSG, sizeof(MSG), 0); \
Tell_no_more_data(FD); \
}
/* which bit corresponds to which field ? */
#define FIELD_USER 0
#define FIELD_RQ 1
#define FIELD_PID 2
#define FIELD_SCHEDULE 3
#define FIELD_LAVG 4
#define FIELD_INDEX 5
#define FIELD_OPTIONS 6
/* the number of char we need (8 bits (i.e. fields) per char) */
#define FIELD_NUM_SIZE 1
void
add_to_select_set(int fd, fd_set * set, int *max_fd)
/* add fd to set, and update max_fd if necessary (for select()) */
{
FD_SET(fd, set);
if (fd > *max_fd)
*max_fd = fd;
}
void
remove_from_select_set(int fd, fd_set * set, int *max_fd)
/* remove fd to set, and update max_fd if necessary (for select()) */
{
FD_CLR(fd, set);
if (fd == *max_fd) {
/* find the biggest fd in order to update max_fd */
struct fcrondyn_cl *client;
int tmp_max_fd = listen_fd;
for (client = fcrondyn_cl_base; client != NULL;
client = client->fcl_next) {
if (client->fcl_sock_fd > tmp_max_fd)
tmp_max_fd = client->fcl_sock_fd;
}
/* update max_fd */
*max_fd = tmp_max_fd;
}
}
void
init_socket(void)
/* do everything needed to get a working listening socket */
{
struct sockaddr_un addr;
int len = 0;
int sun_len = 0;
/* used in fcron.c:main_loop():select() */
FD_ZERO(&read_set);
FD_ZERO(&master_set);
if ((listen_fd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) {
error_e("Could not create socket : fcrondyn won't work");
return;
}
addr.sun_family = AF_UNIX;
len = strlen(fifofile);
if (len > sizeof(addr.sun_path) - 1) {
error("Error : fifo file path too long (max is %d)",
sizeof(addr.sun_path) - 1);
goto err;
}
strncpy(addr.sun_path, fifofile, sizeof(addr.sun_path));
addr.sun_path[sizeof(addr.sun_path) - 1] = '\0';
sun_len = (addr.sun_path - (char *)&addr) + len;
#if HAVE_SA_LEN
addr.sun_len = sun_len;
#endif
unlink(fifofile);
if (bind(listen_fd, (struct sockaddr *)&addr, sun_len) != 0) {
error_e("Cannot bind socket to '%s'", fifofile);
goto err;
}
if (listen(listen_fd, MAX_CONNECTION) != 0) {
error_e("Cannot set socket in listen mode");
goto err;
}
/* */
/* The exec bit is not necessary and ignored on all systems but AIX, where it is
* needed to allow fcrondyn to open the file */
if (chmod
(fifofile,
S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH |
S_IWOTH | S_IXOTH) != 0)
error_e("Cannot chmod() socket file");
/* */
fcntl(listen_fd, F_SETFD, 1);
/* set listen_fd to O_NONBLOCK : we do not want fcron to be stopped on error, etc */
if (fcntl(listen_fd, F_SETFL, fcntl(listen_fd, F_GETFL) | O_NONBLOCK) == -1) {
error_e
("Could not set listen_fd attribute O_NONBLOCK : no fcrondyn support");
goto err;
}
/* no error */
add_to_select_set(listen_fd, &master_set, &set_max_fd);
/* copy master in read_fs, because read_fs will be modified by select() */
read_set = master_set;
debug("Socket initialized : listen_fd : %d set_max_fd : %d ", listen_fd,
set_max_fd);
return;
err:
close_socket();
}
#if defined(HAVE_GETPEERUCRED)
void
auth_client_getpeer(struct fcrondyn_cl *client)
/* check client identity by reading its credentials from the socket
* using getpeerucred() (Solaris 10 onward).
* Sets client->fcl_user on success, don't do anything on failure
* so that the client stays unauthenticated */
{
struct passwd *p_entry = NULL;
ucred_t *ucred = NULL;
uid_t uid = -1;
if (getpeerucred(client->fcl_sock_fd, &ucred) < 0) {
error_e("Could not get client credentials using getpeerucred()");
return;
}
uid = ucred_getruid(ucred);
if (uid == -1) {
error_e("Could not get client uid from ucred_t");
return;
}
p_entry = getpwuid(uid);
if (p_entry == NULL) {
error_e("Could not find password entry for uid %d", uid);
return;
}
/* Successfully identified user: */
client->fcl_user = strdup2(p_entry->pw_name);
explain("Client's pid=%d, uid=%d, username=%s",
ucred_getpid(ucred), uid, client->fcl_user);
}
#endif /* HAVE_GETPEERUCRED */
#if defined(HAVE_GETPEEREID)
/*
* WARNING: UNTESTED CODE !!!
*/
void
auth_client_getpeer(struct fcrondyn_cl *client)
/* check client identity by reading its credentials from the socket
* using getpeerucred() (Solaris 10 onward) or getpeereid(open/freeBSD).
* Sets client->fcl_user on success, don't do anything on failure
* so that the client stays unauthenticated */
{
struct passwd *p_entry = NULL;
uid_t euid = -1;
gid_t egid = -1;
if (getpeereid(client->fcl_sock_fd, &euid, &egid) < 0) {
error_e("Could not get client credentials using getpeereid()");
return;
}
p_entry = getpwuid(euid);
if (p_entry == NULL) {
error_e("Could not find password entry for uid %d", euid);
return;
}
/* Successfully identified user: */
client->fcl_user = strdup2(p_entry->pw_name);
explain("Client's uid=%d, gid=%d username=%s", euid, egid,
client->fcl_user);
}
#endif /* HAVE_GETPEEREID */
#ifdef SO_PEERCRED
void
auth_client_so_peercred(struct fcrondyn_cl *client)
/* check client identity by reading its credentials from the socket
* using getsockopt(SO_PEERCRED) (Linux)
* Sets client->fcl_user on success, don't do anything on failure
* so that the client stays unauthenticated */
{
const int true = 1;
/* There is no ucred.h (or equivalent) on linux to define struct ucred (!!)
* so we do it here */
#if ! ( defined(HAVE_CRED_H) && defined(HAVE_UCRED_H) \
&& defined(HAVE_SYS_CRED_H) && defined(HAVE_SYS_UCRED_H) )
struct ucred {
pid_t pid;
uid_t uid;
gid_t gid;
};
#endif /* struct ucred not defined */
struct ucred cred;
socklen_t cred_size = sizeof(cred);
struct passwd *p_entry = NULL;
setsockopt(client->fcl_sock_fd, SOL_SOCKET, SO_PASSCRED, &true,
sizeof(true));
if (getsockopt
(client->fcl_sock_fd, SOL_SOCKET, SO_PEERCRED, &cred,
&cred_size) != 0) {
error_e
("Could not get client credentials using getsockopt(SO_PEERCRED)");
return;
}
p_entry = getpwuid(cred.uid);
if (p_entry == NULL) {
error_e("Could not find password entry for uid %d", cred.uid);
return;
}
/* Successfully identified user: */
client->fcl_user = strdup2(p_entry->pw_name);
explain("Client's pid=%d, uid=%d, gid=%d username=%s", cred.pid, cred.uid,
cred.gid, client->fcl_user);
}
#endif /* SO_PEERCRED */
void
auth_client_password(struct fcrondyn_cl *client)
/* check client identity by asking him to input his password */
{
char *pass_cry = NULL;
char *pass_sys = NULL;
char *pass_str = NULL;
#ifdef HAVE_GETSPNAM
struct spwd *pass_sp = NULL;
if ((pass_sp = getspnam((char *)client->fcl_cmd)) == NULL) {
error_e("could not getspnam %s", (char *)client->fcl_cmd);
send(client->fcl_sock_fd, "0", sizeof("0"), 0);
return;
}
pass_sys = pass_sp->sp_pwdp;
#else
struct passwd *pass = NULL;
errno = 0;
if ((pass = getpwnam((char *)client->fcl_cmd)) == NULL) {
error_e("could not getpwnam %s", (char *)client->fcl_cmd);
send(client->fcl_sock_fd, "0", sizeof("0"), 0);
return;
}
pass_sys = pass->pw_passwd;
#endif
/* */
debug("auth_client_password() : socket : %d", client->fcl_sock_fd);
/* */
/* we need to limit auth failures : otherwise fcron may be used to "read"
* shadow password !!! (or to crack it using a test-all-possible-password attack) */
if (auth_fail > 0 && auth_nofail_since + AUTH_WAIT <= now)
/* no auth time exceeded : set counter to 0 */
auth_fail = 0;
if (auth_fail >= MAX_AUTH_FAIL) {
error("Too many authentication failures : try to connect later.");
send(client->fcl_sock_fd, "0", sizeof("0"), 0);
auth_fail = auth_nofail_since = 0;
return;
}
/* the password is stored after the user name */
pass_str = &((char *)client->fcl_cmd)[strlen((char *)client->fcl_cmd) + 1];
if ((pass_cry = crypt(pass_str, pass_sys)) == NULL) {
error_e("could not crypt()");
send(client->fcl_sock_fd, "0", sizeof("0"), 0);
Overwrite(pass_str);
return;
}
/* debug("pass_sp->sp_pwdp : %s", pass_sp->sp_pwdp); */
/* debug("pass_cry : %s", pass_cry); */
if (strcmp(pass_cry, pass_sys) == 0) {
client->fcl_user = strdup2((char *)client->fcl_cmd);
send(client->fcl_sock_fd, "1", sizeof("1"), 0);
}
else {
auth_fail++;
auth_nofail_since = now;
error("Invalid passwd for %s from socket %d",
(char *)client->fcl_cmd, client->fcl_sock_fd);
send(client->fcl_sock_fd, "0", sizeof("0"), 0);
}
Overwrite(pass_str);
}
#define Test_add_field(FIELD_NB, FIELD_STR) \
if ( (bit_test(details, FIELD_NB)) ) { \
strncat(fields, FIELD_STR, sizeof(fields)-1 - len); \
len += (sizeof(FIELD_STR)-1); \
}
#define Add_field(FIELD_STR) \
strncat(fields, FIELD_STR, sizeof(fields) - len - 1); \
len += (sizeof(FIELD_STR)-1);
void
print_fields(int fd, unsigned char *details)
/* print a line describing the field types used in print_line() */
{
char fields[TERM_LEN];
char field_id[] = "ID ";
char field_user[] = "|USER ";
char field_rq[] = "|R&Q ";
char field_options[] = "|OPTIONS ";
char field_schedule[] = "|SCHEDULE ";
char field_until[] = "|LAVG 1,5,15 UNTIL STRICT";
char field_pid[] = "|PID ";
char field_index[] = "|INDEX";
char field_cmd[] = "|CMD";
char field_endline[] = "\n";
int len = 0;
fields[0] = '\0';
Add_field(field_id);
Test_add_field(FIELD_USER, field_user);
Test_add_field(FIELD_PID, field_pid);
Test_add_field(FIELD_INDEX, field_index);
Test_add_field(FIELD_RQ, field_rq);
Test_add_field(FIELD_OPTIONS, field_options);
Test_add_field(FIELD_LAVG, field_until);
Test_add_field(FIELD_SCHEDULE, field_schedule);
Add_field(field_cmd);
Add_field(field_endline);
fields[TERM_LEN - 1] = '\0';
if (send(fd, fields, (len < sizeof(fields)) ? len : sizeof(fields), 0) < 0)
error_e("error in send()");
}
void
print_line(int fd, struct cl_t *line, unsigned char *details, pid_t pid,
int index, time_t until)
/* print some basic fields of a line, and some more if details == 1 */
{
char buf[TERM_LEN];
int len = 0;
struct tm *ftime;
len = snprintf(buf, sizeof(buf), "%-5ld", line->cl_id);
if (bit_test(details, FIELD_USER))
len +=
snprintf(buf + len, sizeof(buf) - len, "|%-9s",
line->cl_file->cf_user);
if (bit_test(details, FIELD_PID))
len += snprintf(buf + len, sizeof(buf) - len, "|%-7d", (int)pid);
if (bit_test(details, FIELD_INDEX))
len += snprintf(buf + len, sizeof(buf) - len, "|%-5d", index);
if (bit_test(details, FIELD_RQ))
len += snprintf(buf + len, sizeof(buf) - len, "|%-4d", line->cl_numexe);
if (bit_test(details, FIELD_OPTIONS)) {
char opt[9];
int i = 0;
opt[0] = '\0';
if (is_lavg(line->cl_option))
i += snprintf(opt + i, sizeof(opt) - i, "L%.*s",
(is_lavg_sev(line->cl_option)) ? 0 : 1, "O");
if (is_serial(line->cl_option))
i += snprintf(opt + i, sizeof(opt) - i, "%.*sS%.*s", i, ",",
(is_serial_sev(line->cl_option)) ? 0 : 1, "O");
if (is_exe_sev(line->cl_option))
i += snprintf(opt + i, sizeof(opt) - i, "%.*sES", i, ",");
len += snprintf(buf + len, sizeof(buf) - len, "|%-9s", opt);
}
if (bit_test(details, FIELD_LAVG)) {
len += snprintf(buf + len, sizeof(buf) - len, "|%.1f,%.1f,%.1f",
((double)((line->cl_lavg)[0])) / 10,
((double)((line->cl_lavg)[1])) / 10,
((double)((line->cl_lavg)[2])) / 10);
if (until > 0) {
ftime = localtime(&until);
len +=
snprintf(buf + len, sizeof(buf) - len,
" %04d-%02d-%02d %02d:%02d %s",
(ftime->tm_year + 1900), (ftime->tm_mon + 1),
ftime->tm_mday, ftime->tm_hour, ftime->tm_min,
(is_strict(line->cl_option)) ? "Y" : "N");
}
else
len +=
snprintf(buf + len, sizeof(buf) - len, " %18s",
" (no until set) ");
}
if (bit_test(details, FIELD_SCHEDULE)) {
ftime = localtime(&(line->cl_nextexe));
len +=
snprintf(buf + len, sizeof(buf) - len, "|%04d-%02d-%02d %02d:%02d",
(ftime->tm_year + 1900), (ftime->tm_mon + 1),
ftime->tm_mday, ftime->tm_hour, ftime->tm_min);
}
len += snprintf(buf + len, sizeof(buf) - len, "|%s\n", line->cl_shell);
if (send(fd, buf, (len < sizeof(buf)) ? len : sizeof(buf), 0) < 0)
error_e("error in send()");
}
#define Test_line(LINE, PID, INDEX, UNTIL) \
{ \
if (all || strcmp(user, LINE->cl_file->cf_user) == 0 ) { \
print_line(fd, LINE, fields, PID, INDEX, UNTIL); \
found = 1; \
} \
}
void
cmd_ls(struct fcrondyn_cl *client, long int *cmd, int fd, int is_root)
/* run a command which lists some jobs */
{
int found = 0;
int all = (cmd[1] == ALL) ? 1 : 0;
char *user = NULL;
struct job_t *j;
int i;
unsigned char fields[FIELD_NUM_SIZE];
exe_t *e = NULL;
lavg_t *l = NULL;
for (i = 0; i < FIELD_NUM_SIZE; i++)
fields[i] = 0;
switch (cmd[0]) {
case CMD_DETAILS:
bit_set(fields, FIELD_SCHEDULE);
bit_set(fields, FIELD_RQ);
bit_set(fields, FIELD_USER);
bit_set(fields, FIELD_OPTIONS);
print_fields(fd, fields);
for (j = queue_base; j != NULL; j = j->j_next) {
if (cmd[1] == j->j_line->cl_id) {
if (strcmp(client->fcl_user, j->j_line->cl_file->cf_user) == 0
|| is_root)
print_line(fd, j->j_line, fields, 0, 0, 0);
else
Send_err_msg(fd, err_job_nfound_str);
found = 1;
break;
}
}
break;
case CMD_LIST_JOBS:
case CMD_LIST_LAVGQ:
case CMD_LIST_SERIALQ:
case CMD_LIST_EXEQ:
if (cmd[0] == CMD_LIST_LAVGQ) {
double lavg[3] = { 0, 0, 0 };
char lavg_str[TERM_LEN];
getloadavg(lavg, 3);
i = snprintf(lavg_str, sizeof(lavg_str), "Current load average : "
"%.1f, %.1f, %.1f\n", lavg[0], lavg[1], lavg[2]);
send(fd, lavg_str, i, 0);
bit_set(fields, FIELD_LAVG);
}
else
bit_set(fields, FIELD_SCHEDULE);
if (cmd[0] == CMD_LIST_SERIALQ)
bit_set(fields, FIELD_INDEX);
if (cmd[0] == CMD_LIST_EXEQ)
bit_set(fields, FIELD_PID);
if (all && !is_root) {
warn("User %s tried to list *all* jobs.", client->fcl_user);
Send_err_msg_end(fd, err_all_nallowed_str);
return;
}
if (all)
bit_set(fields, FIELD_USER);
print_fields(fd, fields);
if (!all) {
struct passwd *pass;
#ifdef SYSFCRONTAB
if (cmd[1] == SYSFCRONTAB_UID)
user = SYSFCRONTAB;
else {
#endif
if ((pass = getpwuid((uid_t) cmd[1])) == NULL) {
warn_e("Unable to find passwd entry for %ld", cmd[1]);
Send_err_msg_end(fd, err_invalid_user_str);
return;
}
if (!is_root && strcmp(pass->pw_name, client->fcl_user) != 0) {
warn_e("%s is not allowed to see %s's jobs. %ld",
client->fcl_user, pass->pw_name);
Send_err_msg_end(fd, err_others_nallowed_str);
return;
}
user = pass->pw_name;
#ifdef SYSFCRONTAB
}
#endif
}
/* list all jobs one by one and find the corresponding ones */
switch (cmd[0]) {
case CMD_LIST_JOBS:
for (j = queue_base; j != NULL; j = j->j_next)
Test_line(j->j_line, 0, 0, 0);
break;
case CMD_LIST_EXEQ:
for (e = exe_list_first(exe_list); e != NULL;
e = exe_list_next(exe_list)) {
if (e->e_line == NULL) {
if (is_root) {
send_msg_fd(fd, "job no more in an fcrontab: pid %d",
e->e_job_pid);
found = 1;
}
}
else {
Test_line(e->e_line, e->e_job_pid, 0, 0);
}
}
break;
case CMD_LIST_LAVGQ:
for (l = lavg_list_first(lavg_list); l != NULL;
l = lavg_list_next(lavg_list))
Test_line(l->l_line, 0, 0, l->l_until);
break;
case CMD_LIST_SERIALQ:
{
int j;
i = serial_array_index;
for (j = 0; j < serial_num; j++) {
Test_line(serial_array[i], 0, j, 0);
if (++i >= serial_array_size)
i -= serial_array_size;
}
break;
}
}
break;
}
if (!found)
Send_err_msg(fd, err_job_nfound_str);
/* to tell fcrondyn there's no more data to wait */
Tell_no_more_data(fd);
}
void
cmd_on_exeq(struct fcrondyn_cl *client, long int *cmd, int fd, int is_root)
/* common code to all cmds working on jobs in the exeq */
{
int found = 0;
char *err_str = NULL;
exe_t *e = NULL;
/* find the corresponding job */
for (e = exe_list_first(exe_list); e != NULL; e = exe_list_next(exe_list)) {
if (e->e_line != NULL && cmd[2] == e->e_line->cl_id) {
found = 1;
/* check if the request is valid */
if (!is_root &&
strcmp(client->fcl_user, e->e_line->cl_file->cf_user) != 0) {
if (cmd[0] == CMD_RENICE)
err_str = "%s tried to renice to %ld job id %ld for %s : "
"not allowed.";
else if (cmd[0] == CMD_SEND_SIGNAL)
err_str = "%s tried to send signal %ld to id %ld for %s : "
"not allowed.";
else
err_str = "cannot run unknown cmd with arg %ld on job id "
"%ld for %s : not allowed.";
warn(err_str, client->fcl_user, cmd[1], cmd[2],
client->fcl_user);
Send_err_msg_end(fd, err_job_nfound_str);
}
else {
/* request is valid : do it */
if (cmd[0] == CMD_SEND_SIGNAL)
cmd_send_signal(client, cmd, fd, e);
else if (cmd[0] == CMD_RENICE)
cmd_renice(client, cmd, fd, e, is_root);
else {
Send_err_msg_end(fd, err_cmd_unknown_str);
exe_list_end_iteration(exe_list);
return;
}
}
}
}
if (!found) {
if (cmd[0] == CMD_RENICE)
err_str = "cannot renice job id %ld for %s : no corresponding "
"running job.";
else if (cmd[0] == CMD_SEND_SIGNAL)
err_str = "cannot send signal to job id %ld for %s :"
" no corresponding running job.";
else
err_str = "cannot run unknown cmd on job id %ld for %s :"
" no corresponding running job.";
warn(err_str, cmd[2], client->fcl_user);
Send_err_msg_end(fd, err_rjob_nfound_str);
}
else {
Tell_no_more_data(fd);
}
}
void
cmd_renice(struct fcrondyn_cl *client, long int *cmd, int fd, exe_t * e,
int is_root)
/* change nice value of a running job */
{
#ifdef HAVE_SETPRIORITY
/* check if arguments are valid */
if (e->e_job_pid <= 0 || ((int)cmd[1] < 0 && !is_root)
|| (int)cmd[1] > 20 || (int)cmd[1] < -20) {
warn("renice: invalid args : pid: %d nice_value: %d user: %s.",
e->e_job_pid, (int)cmd[1], client->fcl_user);
Send_err_msg_end(fd, err_invalid_args_str);
return;
}
/* ok, now setpriority() the job */
if (setpriority(PRIO_PROCESS, e->e_job_pid, (int)cmd[1]) != 0) {
error_e("could not setpriority(PRIO_PROCESS, %d, %d)",
e->e_job_pid, (int)cmd[1]);
Send_err_msg_end(fd, err_unknown_str);
return;
}
else {
send_msg_fd(fd, "Command successfully completed on process %d.",
e->e_job_pid);
return;
}
#else /* HAVE_SETPRIORITY */
warn("System has no setpriority() : cannot renice. pid: %d nice_value: %d user: %s.", e->e_job_pid, (int)cmd[1], client->fcl_user);
Send_err_msg_end(fd, err_cmd_unknown_str);
#endif /* HAVE_SETPRIORITY */
}
void
cmd_send_signal(struct fcrondyn_cl *client, long int *cmd, int fd, exe_t * e)
/* send a signal to a running job */
{
if (e->e_job_pid <= 0 || (int)cmd[1] <= 0) {
warn("send_signal: invalid args : pid: %d signal: %d user: %s",
e->e_job_pid, (int)cmd[1], client->fcl_user);
Send_err_msg_end(fd, err_invalid_args_str);
return;
}
/* ok, now kill() the job */
if (kill(e->e_job_pid, (int)cmd[1]) != 0) {
error_e("could not kill(%d, %d)", e->e_job_pid, (int)cmd[1]);
Send_err_msg_end(fd, err_unknown_str);
return;
}
else {
send_msg_fd(fd, "Command successfully completed on process %d.",
e->e_job_pid);
return;
}
}
void
cmd_run(struct fcrondyn_cl *client, long int *cmd, int fd, int is_root)
/* Run a job and rescheduled if requested */
{
struct job_t *j = NULL;
for (j = queue_base; j != NULL; j = j->j_next) {
if (cmd[1] == j->j_line->cl_id) {
if (strcmp(client->fcl_user, j->j_line->cl_file->cf_user) == 0
|| is_root) {
if (is_lavg(j->j_line->cl_option))
add_lavg_job(j->j_line, fd);
else if (is_serial(j->j_line->cl_option))
add_serial_job(j->j_line, fd);
else
run_normal_job(j->j_line, fd);
if (cmd[0] == CMD_RUNNOW)
set_next_exe(j->j_line, FROM_CUR_NEXTEXE, fd);
Tell_no_more_data(fd);
return;
}
}
}
/* we don't come here if a job has been found */
Send_err_msg_end(fd, err_job_nfound_str);
}
void
exe_cmd(struct fcrondyn_cl *client)
/* read command, and call corresponding function */
{
long int *cmd;
int fd;
int is_root = 0;
is_root = (strcmp(client->fcl_user, ROOTNAME) == 0) ? 1 : 0;
/* to make things clearer (avoid repeating client->fcl_ all the time) */
cmd = client->fcl_cmd;
fd = client->fcl_sock_fd;
/* */
debug("exe_cmd [0,1,2] : %d %d %d", cmd[0], cmd[1], cmd[2]);
/* */
switch (cmd[0]) {
case CMD_SEND_SIGNAL:
case CMD_RENICE:
cmd_on_exeq(client, cmd, fd, is_root);
break;
case CMD_DETAILS:
case CMD_LIST_JOBS:
case CMD_LIST_LAVGQ:
case CMD_LIST_SERIALQ:
case CMD_LIST_EXEQ:
cmd_ls(client, cmd, fd, is_root);
break;
case CMD_RUN:
case CMD_RUNNOW:
cmd_run(client, cmd, fd, is_root);
break;
default:
Send_err_msg_end(fd, err_cmd_unknown_str);
}
}
void
remove_connection(struct fcrondyn_cl **client, struct fcrondyn_cl *prev_client)
/* close the connection, remove it from the list
and make client points to the next entry */
{
debug("closing connection : fd : %d", (*client)->fcl_sock_fd);
shutdown((*client)->fcl_sock_fd, SHUT_RDWR);
remove_from_select_set((*client)->fcl_sock_fd, &master_set, &set_max_fd);
xclose_check(&((*client)->fcl_sock_fd), "client fd");
if (prev_client == NULL) {
fcrondyn_cl_base = (*client)->fcl_next;
Free_safe((*client)->fcl_user);
Free_safe(*client);
*client = fcrondyn_cl_base;
}
else {
prev_client->fcl_next = (*client)->fcl_next;
Free_safe((*client)->fcl_user);
Free_safe(*client);
*client = prev_client->fcl_next;
}
fcrondyn_cl_num -= 1;
}
void
check_socket(int num)
/* check for new connection, command, connection closed */
{
int fd = -1, avoid_fd = -1;
socklen_t addr_len = sizeof(struct sockaddr_un);
struct sockaddr_un client_addr;
long int buf_int[SOCKET_MSG_LEN];
int read_len = 0;
struct fcrondyn_cl *client = NULL, *prev_client = NULL;
if (num <= 0)
/* no socket to check : go directly to the end of that function */
goto final_settings;
debug("Checking socket ...");
if (FD_ISSET(listen_fd, &read_set)) {
debug("got new connection ...");
fd = accept(listen_fd, (struct sockaddr *)&client_addr, &addr_len);
if (fd == -1) {
error_e
("could not accept new connection : isset(listen_fd = %d) = %d",
listen_fd, FD_ISSET(listen_fd, &read_set));
}
else {
fcntl(fd, F_SETFD, 1);
/* set fd to O_NONBLOCK : we do not want fcron to be stopped on error, etc */
if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK) == -1) {
error_e
("Could not set fd attribute O_NONBLOCK : connection rejected.");
shutdown(fd, SHUT_RDWR);
xclose_check(&fd, "client fd");
}
else {
Alloc(client, fcrondyn_cl);
client->fcl_sock_fd = fd;
/* means : not authenticated yet : */
client->fcl_user = NULL;
client->fcl_cmd = NULL;
/* include new entry in client list */
client->fcl_next = fcrondyn_cl_base;
fcrondyn_cl_base = client;
client->fcl_idle_since = now;
/* to avoid trying to read from it in this call */
avoid_fd = fd;
add_to_select_set(fd, &master_set, &set_max_fd);
fcrondyn_cl_num += 1;
debug("Added connection fd : %d - %d connections", fd,
fcrondyn_cl_num);
#ifdef SO_PEERCRED
auth_client_so_peercred(client);
#elif defined(HAVE_GETPEERUCRED) || defined(HAVE_GETPEEREID)
auth_client_getpeer(client);
#endif /* SO_PEERCRED */
}
}
}
client = fcrondyn_cl_base;
while (client != NULL) {
if (!FD_ISSET(client->fcl_sock_fd, &read_set)
|| client->fcl_sock_fd == avoid_fd) {
/* check if the connection has not been idle for too long ... */
if (client->fcl_user == NULL
&& now - client->fcl_idle_since > MAX_AUTH_TIME) {
warn("Connection with no auth for more than %ds : closing it.",
MAX_AUTH_TIME);
remove_connection(&client, prev_client);
}
else if (now - client->fcl_idle_since > MAX_IDLE_TIME) {
warn("Connection of %s is idle for more than %ds : closing it.",
client->fcl_user, MAX_IDLE_TIME);
remove_connection(&client, prev_client);
}
else {
/* nothing to do on this one ... check the next one */
prev_client = client;
client = client->fcl_next;
}
continue;
}
if ((read_len =
recv(client->fcl_sock_fd, buf_int, sizeof(buf_int), 0)) <= 0) {
if (read_len == 0) {
/* connection closed by client */
remove_connection(&client, prev_client);
}
else {
error_e("error recv() from sock fd %d", client->fcl_sock_fd);
prev_client = client;
client = client->fcl_next;
}
}
else {
client->fcl_cmd_len = read_len;
client->fcl_cmd = buf_int;
if (client->fcl_user == NULL)
/* not authenticated yet */
auth_client_password(client);
else {
/* we've just read a command ... */
client->fcl_idle_since = now;
exe_cmd(client);
}
prev_client = client;
client = client->fcl_next;
}
}
final_settings:
/* copy master_set in read_set, because read_set is modified by select() */
read_set = master_set;
}
void
close_socket(void)
/* close connections, close socket, remove socket file */
{
struct fcrondyn_cl *client, *client_buf = NULL;
if (listen_fd) {
shutdown(listen_fd, SHUT_RDWR);
xclose_check(&listen_fd, "listening fd");
unlink(fifofile);
client = fcrondyn_cl_base;
while (client != NULL) {
shutdown(client->fcl_sock_fd, SHUT_RDWR);
xclose_check(&(client->fcl_sock_fd), "client fd");
client_buf = client->fcl_next;
Free_safe(client);
fcrondyn_cl_num -= 1;
client = client_buf;
}
}
}