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compile-control.c
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compile-control.c
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/* -*- mode: c -*- */
/* Copyright (C) 2006-2019 Alexander Chernov <cher@ejudge.ru> */
/*
* 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.
*/
#include "ejudge/config.h"
#include "ejudge/ej_types.h"
#include "ejudge/version.h"
#include "ejudge/ejudge_cfg.h"
#include "ejudge/ej_process.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <pwd.h>
#include <unistd.h>
#include <errno.h>
#include <grp.h>
#include <dirent.h>
#include <limits.h>
#include <signal.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdarg.h>
#define EXIT_SYSTEM_ERROR 2
#define EXIT_OPERATION_FAILED 1
#define DEFAULT_EJUDGE_PRIMARY_USER "ejudge"
#define EJ_COMPILE_PROGRAM "ej-compile"
#define PROC_DIRECTORY "/proc"
#define EXE_LINK "exe"
#define START_WAIT_COUNT 10
extern char **environ;
static const unsigned char *program_name = "ej-compile-control";
enum
{
OPERATION_START = 1,
OPERATION_STOP = 2,
OPERATION_KILL = 3,
OPERATION_RESTART = 4,
OPERATION_HARD_RESTART = 5,
OPERATION_STATUS = 6
};
static void
write_help(void)
{
printf("%s: ej-compile control utility\n"
"Usage: %s [OPTIONS] COMMAND\n"
" OPTIONS:\n"
" --help write message and exit\n"
" --version report version and exit\n"
" COMMAND:\n"
" start start the ej-compile\n"
" stop stop the ej-compile\n"
" restart restart the ej-compile\n"
" status report the ej-compile status\n",
program_name, program_name);
}
static void
write_version(void)
{
printf("%s %s, compiled %s\n", program_name, compile_version, compile_date);
}
static void __attribute__((format(printf, 1, 2), noreturn))
system_error(const char *format, ...)
{
va_list args;
char buf[1024];
va_start(args, format);
vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
fprintf(stderr, "%s: %s\n", program_name, buf);
exit(EXIT_SYSTEM_ERROR);
}
static void __attribute__((format(printf, 1, 2), noreturn))
syscall_error(const char *format, ...)
{
va_list args;
char buf[1024];
int saved_errno = errno;
va_start(args, format);
vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
fprintf(stderr, "%s: %s: %s\n", program_name, buf, strerror(saved_errno));
exit(EXIT_SYSTEM_ERROR);
}
struct EnvVector
{
char **v;
int u, a;
};
static void
env_init(struct EnvVector *ev)
{
ev->a = 16;
ev->v = malloc(ev->a * sizeof(ev->v[0]));
ev->u = 0;
ev->v[0] = NULL;
}
static void
env_set(struct EnvVector *ev, const unsigned char *name, const unsigned char *value)
{
if (!value) return;
int namelen = strlen(name);
for (int i = 0; i < ev->u; ++i) {
if (!strncmp(ev->v[i], name, namelen) && ev->v[i][namelen] == '=') {
free(ev->v[i]); ev->v[i] = NULL;
asprintf(&ev->v[i], "%s=%s", name, value);
return;
}
}
if (ev->u + 1 == ev->a) {
ev->v = realloc(ev->v, (ev->a *= 2) * sizeof(ev->v[0]));
}
asprintf(&ev->v[ev->u++], "%s=%s", name, value);
ev->v[ev->u] = NULL;
}
static const unsigned char __attribute__((unused)) *
env_get(struct EnvVector *ev, const unsigned char *name)
{
int namelen = strlen(name);
for (int i = 0; i < ev->u; ++i) {
if (!strncmp(ev->v[i], name, namelen) && ev->v[i][namelen] == '=') {
return ev->v[i] + namelen + 1;
}
}
return NULL;
}
struct PidVector
{
int *v;
int u, a;
};
static void
pv_free(struct PidVector *pv)
{
free(pv->v);
memset(pv, 0, sizeof(*pv));
}
static int
find_all(const unsigned char *process_name, struct PidVector *pv)
{
DIR *d = opendir(PROC_DIRECTORY);
if (!d) {
fprintf(stderr, "%s: cannot open %s: %s\n", program_name, PROC_DIRECTORY, strerror(errno));
return -1;
}
struct dirent *dd;
while ((dd = readdir(d))) {
char *ep = NULL;
errno = 0;
long val = strtol(dd->d_name, &ep, 10);
if (errno || *ep || (int) val != val || val <= 0) continue;
unsigned char entry_path[PATH_MAX];
if (snprintf(entry_path, sizeof(entry_path), "%s/%s/%s", PROC_DIRECTORY, dd->d_name, EXE_LINK) >= sizeof(entry_path)) {
continue;
}
unsigned char exe_path[PATH_MAX];
ssize_t exe_len = readlink(entry_path, exe_path, sizeof(exe_path));
if (exe_len <= 0 || exe_len >= sizeof(exe_path)) continue;
exe_path[exe_len] = 0;
const unsigned char *ptr = strrchr(exe_path, '/');
if (!ptr) {
ptr = exe_path;
} else {
++ptr;
}
if (!strcmp(ptr, process_name)) {
if (pv->u == pv->a) {
if (!(pv->a *= 2)) pv->a = 16;
pv->v = realloc(pv->v, pv->a * sizeof(pv->v[0]));
if (!pv->v) {
system_error("out of memory");
}
}
pv->v[pv->u++] = val;
}
}
closedir(d); d = NULL;
return 0;
}
static int
kill_all(int signal, struct PidVector *pv)
{
for (int i = 0; i < pv->u; ++i) {
if (kill(pv->v[i], signal) < 0) {
if (errno == EPERM) {
fprintf(stderr, "%s: cannot send signal to %d: %s\n", program_name, pv->v[i], strerror(errno));
}
}
}
return 0;
}
static int
check_process(int pid, const unsigned char *process_name)
{
unsigned char exelink_path[PATH_MAX];
if (snprintf(exelink_path, sizeof(exelink_path), "%s/%d/%s", PROC_DIRECTORY, pid, EXE_LINK) >= sizeof(exelink_path)) {
return 0;
}
unsigned char exe_path[PATH_MAX];
ssize_t exe_len = readlink(exelink_path, exe_path, sizeof(exe_path));
if (exe_len <= 0 || exe_len >= sizeof(exe_path)) {
return 0;
}
exe_path[exe_len] = 0;
const unsigned char *ptr = strrchr(exe_path, '/');
if (!ptr) {
ptr = exe_path;
} else {
++ptr;
}
return !strcmp(ptr, process_name);
}
static int __attribute__((unused))
check_processes(const unsigned char *process_name, struct PidVector *pv)
{
for (int i = 0; i < pv->u; ) {
if (check_process(pv->v[i], process_name)) {
++i;
} else {
for (int j = i + 1; j < pv->u; ++j) {
pv->v[j - 1] = pv->v[j];
}
--pv->u;
}
}
return pv->u;
}
static int
start_process(
const struct ejudge_cfg *config,
const unsigned char *process_name,
int log_fd,
const unsigned char *workdir,
struct EnvVector *ev,
const unsigned char *exepath,
int is_parallel,
int replace_env,
int ej_xml_fd)
{
int pid = fork();
if (pid < 0) {
fprintf(stderr, "%s: cannot create process: %s\n", program_name, strerror(errno));
return -1;
}
if (pid > 0) {
return 0;
}
// this is child code
pid = fork();
if (pid < 0) {
_exit(1);
}
if (pid > 0) {
_exit(0);
}
// grandchild
setsid(); // new session
setpgid(0, 0); // new process group
// redirect standard streams
int fd0 = open("/dev/null", O_RDONLY, 0);
if (fd0 < 0) _exit(1);
if (dup2(fd0, 0) < 0) _exit(1);
if (dup2(log_fd, 1) < 0) _exit(1);
if (dup2(log_fd, 2) < 0) _exit(1);
close(fd0); fd0 = -1;
close(log_fd); log_fd = -1;
// change directory
if (workdir && *workdir) {
if (chdir(workdir) < 0) _exit(1);
}
// enable all signals
sigset_t ss;
sigemptyset(&ss);
sigprocmask(SIG_SETMASK, &ss, NULL);
char *args[64];
char lbuf[64];
int argi = 0;
args[argi++] = (char*) exepath;
if (is_parallel) args[argi++] = "-p";
if (ej_xml_fd >= 0) {
args[argi++] = "-l";
snprintf(lbuf, sizeof(lbuf), "%d", ej_xml_fd);
args[argi++] = lbuf;
}
args[argi++] = "conf/compile.cfg";
args[argi] = NULL;
if (replace_env) {
environ = ev->v;
}
execve(exepath, args, environ);
// nobody will know...
_exit(1);
}
static void
signal_and_wait(int signo)
{
struct PidVector pv = {};
if (find_all(EJ_COMPILE_PROGRAM, &pv) < 0) {
system_error("cannot enumerate processes");
}
if (pv.u <= 0) return;
kill_all(signo, &pv);
do {
usleep(100000);
pv_free(&pv);
} while (find_all(EJ_COMPILE_PROGRAM, &pv) >= 0 && pv.u > 0);
pv_free(&pv);
}
static void
emergency_stop(void)
{
// wait some reasonable time - 0.5s
usleep(500000);
signal_and_wait(SIGTERM);
}
static void
change_ownership_and_permissions(const unsigned char *dir, const unsigned char *name, int uid, int gid, int perms)
{
unsigned char p[PATH_MAX];
if (snprintf(p, sizeof(p), "%s/%s", dir, name) >= sizeof(p)) return;
struct stat stb;
if (stat(p, &stb) < 0 || !S_ISDIR(stb.st_mode)) return;
chown(p, uid, gid);
chmod(p, perms);
}
static void
spool_change_ownership_and_permissions(const unsigned char *dir, const unsigned char *name, int uid, int gid, int perms)
{
unsigned char p[PATH_MAX];
if (snprintf(p, sizeof(p), "%s/%s", dir, name) >= sizeof(p)) return;
struct stat stb;
if (stat(p, &stb) < 0 || !S_ISDIR(stb.st_mode)) return;
change_ownership_and_permissions(p, "dir", uid, gid, perms);
change_ownership_and_permissions(p, "in", uid, gid, perms);
change_ownership_and_permissions(p, "out", uid, gid, perms);
}
static void
check_directories(int primary_uid, int compile_uid, int primary_gid, int compile_gid, const struct ejudge_cfg *config)
{
// check compile working directory
unsigned char d1[PATH_MAX];
unsigned char d2[PATH_MAX];
unsigned char d3[PATH_MAX];
unsigned char d4[PATH_MAX];
struct stat stb;
#if defined EJUDGE_LOCAL_DIR
snprintf(d1, sizeof(d1), "%s", EJUDGE_LOCAL_DIR);
if (stat(d1, &stb) < 0 || !S_ISDIR(stb.st_mode)) {
system_error("directory '%s' does not exist", d1);
}
snprintf(d2, sizeof(d2), "%s/compile", d1);
if (stat(d2, &stb) >= 0) {
if (!S_ISDIR(stb.st_mode)) {
system_error("'%s' is not a directory", d2);
}
} else {
if (mkdir(d2, 0755) < 0) {
syscall_error("cannot create '%s'", d2);
}
}
snprintf(d3, sizeof(d3), "%s/work", d2);
if (stat(d3, &stb) >= 0) {
if (!S_ISDIR(stb.st_mode)) {
system_error("'%s' is not a directory", d3);
}
// must be group-writable
if (stb.st_gid != compile_gid) {
chown(d3, -1, compile_gid);
chmod(d3, 06775);
}
} else {
if (mkdir(d3, 0755) < 0) {
syscall_error("cannot create '%s'", d3);
}
chown(d3, primary_uid, compile_gid);
chmod(d3, 06775);
}
#endif
d1[0] = 0;
if (config && config->compile_home_dir && config->compile_home_dir[0]) {
snprintf(d1, sizeof(d1), "%s", config->compile_home_dir);
}
#if defined EJUDGE_CONTESTS_HOME_DIR
if (!d1[0]) {
snprintf(d1, sizeof(d1), "%s/compile", EJUDGE_CONTESTS_HOME_DIR);
}
#endif
if (stat(d1, &stb) < 0 || !S_ISDIR(stb.st_mode)) {
system_error("'%s' is not a directory", d1);
}
snprintf(d2, sizeof(d2), "%s/var", d1);
if (stat(d2, &stb) >= 0) {
if (!S_ISDIR(stb.st_mode)) {
system_error("'%s' is not a directory", d2);
}
} else {
if (mkdir(d2, 0755) < 0) {
syscall_error("cannot create '%s'", d2);
}
chown(d3, primary_uid, primary_gid);
chmod(d3, 0755);
}
// reserve working directory
snprintf(d3, sizeof(d3), "%s/work", d2);
if (stat(d3, &stb) >= 0) {
if (!S_ISDIR(stb.st_mode)) {
system_error("'%s' is not a directory", d3);
}
// must be group-writable
if (stb.st_gid != compile_gid) {
chown(d3, -1, compile_gid);
chmod(d3, 06775);
}
} else {
if (mkdir(d3, 0755) < 0) {
syscall_error("cannot create '%s'", d3);
}
chown(d3, primary_uid, compile_gid);
chmod(d3, 06775);
}
// spool directory
snprintf(d3, sizeof(d3), "%s/compile", d2);
if (stat(d3, &stb) >= 0) {
if (!S_ISDIR(stb.st_mode)) {
system_error("'%s' is not a directory", d3);
}
// must be group-writable
if (stb.st_gid != compile_gid) {
chown(d3, -1, compile_gid);
chmod(d3, 06775);
}
} else {
if (mkdir(d3, 0755) < 0) {
syscall_error("cannot create '%s'", d3);
}
chown(d3, primary_uid, compile_gid);
chmod(d3, 06775);
}
// spool directory skeleton
snprintf(d4, sizeof(d4), "%s/upgrade-v2", d3);
if (lstat(d4, &stb) >= 0) {
if (!S_ISREG(stb.st_mode)) {
system_error("'%s' is not a regular file", d4);
}
return;
}
change_ownership_and_permissions(d3, "src", primary_uid, compile_gid, 06777);
spool_change_ownership_and_permissions(d3, "queue", primary_uid, compile_gid, 06777);
DIR *d = opendir(d3);
if (d) {
struct dirent *dd;
while ((dd = readdir(d))) {
if (strlen(dd->d_name) == 6) {
errno = 0;
char *eptr = 0;
long cnts_id = strtol(dd->d_name, &eptr, 10);
if (!errno && !*eptr && (int) cnts_id == cnts_id && cnts_id > 0) {
snprintf(d4, sizeof(d4), "%s/%s", d3, dd->d_name);
if (stat(d4, &stb) >= 0 && S_ISDIR(stb.st_mode)) {
change_ownership_and_permissions(d4, "report", primary_uid, compile_gid, 06777);
spool_change_ownership_and_permissions(d4, "status", primary_uid, compile_gid, 06777);
}
}
}
}
closedir(d);
}
snprintf(d4, sizeof(d4), "%s/upgrade-v2", d3);
close(open(d4, O_WRONLY | O_CREAT | O_NONBLOCK, 0660));
}
int main(int argc, char *argv[])
{
if (argc < 1) {
system_error("no arguments");
}
{
const unsigned char *p = strrchr(argv[0], '/');
if (!p) {
program_name = argv[0];
} else {
program_name = p + 1;
}
}
const unsigned char *operation = NULL;
int op = 0;
{
int aidx = 1;
while (aidx < argc) {
if (!strcmp(argv[aidx], "--help")) {
write_help();
return 0;
} else if (!strcmp(argv[aidx], "--version")) {
write_version();
return 0;
} else if (!strcmp(argv[aidx], "--")) {
++aidx;
break;
} else if (argv[aidx][0] == '-') {
system_error("invalid option '%s'", argv[aidx]);
} else {
break;
}
++aidx;
}
if (aidx != argc - 1) {
// ignore remaining args -- for compatibility
//system_error("invalid command line");
}
operation = argv[aidx];
}
if (!operation) {
system_error("no operation");
}
if (!strcmp(operation, "start")) {
op = OPERATION_START;
} else if (!strcmp(operation, "stop")) {
op = OPERATION_STOP;
} else if (!strcmp(operation, "kill")) {
op = OPERATION_KILL;
} else if (!strcmp(operation, "restart")) {
op = OPERATION_RESTART;
} else if (!strcmp(operation, "hard-restart")) {
op = OPERATION_HARD_RESTART;
} else if (!strcmp(operation, "status")) {
op = OPERATION_STATUS;
} else {
system_error("invalid operation '%s'", operation);
}
uid_t ruid = -1, euid = -1, suid = -1;
getresuid(&ruid, &euid, &suid);
// drop privileges for a while
if (setresuid(-1, ruid, euid) < 0) {
syscall_error("setresuid failed");
}
int compile_uid = -1;
int compile_gid = -1;
int primary_uid = -1;
int primary_gid = -1;
int current_uid = -1;
unsigned char compile_home[PATH_MAX] = {};
#if defined EJUDGE_COMPILE_USER
// privilege separation mode
{
struct passwd *upwd = getpwnam(EJUDGE_COMPILE_USER);
if (!upwd) {
system_error("no user '%s'", EJUDGE_COMPILE_USER);
}
compile_uid = upwd->pw_uid;
compile_gid = upwd->pw_gid;
if (snprintf(compile_home, sizeof(compile_home), "%s", upwd->pw_dir) >= sizeof(compile_home)) {
system_error("invalid home directory");
}
const unsigned char *primary_user = NULL;
#if defined EJUDGE_PRIMARY_USER
primary_user = EJUDGE_PRIMARY_USER;
#else
primary_user = DEFAULT_EJUDGE_PRIMARY_USER;
#endif
upwd = getpwnam(primary_user);
if (!upwd) {
system_error("no user '%s'", primary_user);
}
primary_uid = upwd->pw_uid;
primary_gid = upwd->pw_gid;
}
#endif
current_uid = getuid();
if (primary_uid != compile_uid) {
// disallow running this program by unwanted users
if (current_uid != 0 && current_uid != primary_uid) {
system_error("this program cannot be run by this user");
}
}
struct ejudge_cfg *config = NULL;
const unsigned char *ejudge_xml_path = NULL;
#if defined EJUDGE_XML_PATH
if (!ejudge_xml_path) ejudge_xml_path = EJUDGE_XML_PATH;
#endif /* EJUDGE_XML_PATH */
if (!(config = ejudge_cfg_parse(ejudge_xml_path, 1))) {
system_error("failed to parse '%s'", ejudge_xml_path);
}
int ejudge_xml_fd = -1;
if (primary_uid != compile_uid) {
ejudge_xml_fd = open(ejudge_xml_path, O_RDONLY);
if (ejudge_xml_fd < 0) {
system_error("cannot open '%s'", ejudge_xml_path);
}
}
unsigned char **host_names = NULL;
if (!(host_names = ejudge_get_host_names())) {
system_error("cannot obtain the list of host names");
}
if (!host_names[0]) {
system_error("cannot determine the name of the host");
}
int compile_parallelism = 1;
compile_parallelism = ejudge_cfg_get_host_option_int(config, host_names, "compile_parallelism", 1, 0);
if (compile_parallelism <= 0 || compile_parallelism > 128) {
system_error("invalid value of compile_parallelism host option");
}
// open log path before changing the user
unsigned char logpath[PATH_MAX] = {};
int log_fd = -1;
#if defined EJUDGE_CONTESTS_HOME_DIR
if (!logpath[0]) {
if (snprintf(logpath, sizeof(logpath), "%s/var/ej-compile.log", EJUDGE_CONTESTS_HOME_DIR) >= sizeof(logpath)) {
system_error("log path is too long");
}
}
#endif
if (!logpath[0]) {
system_error("compile log file is not specified");
}
log_fd = open(logpath, O_WRONLY | O_APPEND | O_CREAT | O_NONBLOCK, 0600);
if (log_fd < 0) {
syscall_error("cannot open log file '%s'", logpath);
}
struct stat stb;
fstat(log_fd, &stb);
if (!S_ISREG(stb.st_mode)) {
system_error("log file '%s' is not regular", logpath);
}
fcntl(log_fd, F_SETFL, fcntl(log_fd, F_GETFL) & ~O_NONBLOCK);
unsigned char workdir[PATH_MAX] = {};
if (config && config->compile_home_dir && config->compile_home_dir[0]) {
if (snprintf(workdir, sizeof(workdir), "%s", config->compile_home_dir) >= sizeof(workdir)) {
system_error("invalid working directory");
}
}
#if defined EJUDGE_CONTESTS_HOME_DIR
if (!workdir[0]) {
if (snprintf(workdir, sizeof(workdir), "%s/compile", EJUDGE_CONTESTS_HOME_DIR) >= sizeof(workdir)) {
system_error("invalid working directory");
}
}
#endif
if (!workdir[0]) {
system_error("working directory not specified");
}
if (stat(workdir, &stb) < 0) {
system_error("working directory does not exist");
}
if (!S_ISDIR(stb.st_mode)) {
system_error("invalid working directory");
}
unsigned char ej_compile_path[PATH_MAX];
if (snprintf(ej_compile_path, sizeof(ej_compile_path), "%s/%s", EJUDGE_SERVER_BIN_PATH, EJ_COMPILE_PROGRAM) >= sizeof(ej_compile_path)) {
system_error("invalid ej-compile path");
}
struct EnvVector ev = {};
env_init(&ev);
if (1 /*primary_uid != compile_uid*/) {
if (primary_uid != compile_uid) {
#if defined EJUDGE_COMPILE_USER
env_set(&ev, "USER", EJUDGE_COMPILE_USER);
env_set(&ev, "LOGNAME", EJUDGE_COMPILE_USER);
#endif
env_set(&ev, "HOME", compile_home);
} else {
env_set(&ev, "USER", getenv("USER"));
env_set(&ev, "LOGNAME", getenv("LOGNAME"));
env_set(&ev, "HOME", getenv("HOME"));
}
env_set(&ev, "TMPDIR", "/var/tmp");
for (char **curenv = environ; *curenv; ++curenv) {
const char *ee = *curenv;
const char *ep = strchr(ee, '=');
if (!ep) continue;
int namelen = ep - ee + 1;
if (namelen <= 0) continue;
// whitelisted env vars
if (!strncmp("HOSTNAME=", ee, namelen)) {
env_set(&ev, "HOSTNAME", ep + 1);
} else if (!strncmp("SHELL=", ee, namelen)) {
env_set(&ev, "SHELL", ep + 1);
} else if (!strncmp("PATH=", ee, namelen)) {
env_set(&ev, "PATH", ep + 1);
} else if (!strncmp("LANG=", ee, namelen)) {
env_set(&ev, "LANG", ep + 1);
}
}
}
if (op == OPERATION_START && primary_uid != compile_uid) {
check_directories(primary_uid, primary_gid, compile_uid, compile_gid, config);
}
if (setresuid(-1, euid, euid) < 0) {
syscall_error("setresuid failed");
}
if (primary_uid != compile_uid) {
// change the identity
if (setgid(compile_gid) < 0) {
syscall_error("cannot change group to %d", compile_gid);
}
int supp_groups[1] = { compile_gid };
if (setgroups(1, supp_groups) < 0) {
syscall_error("cannot change groups to %d", compile_gid);
}
if (setuid(compile_uid) < 0) {
syscall_error("cannot change user to %d", compile_uid);
}
}
switch (op) {
case OPERATION_HARD_RESTART:
signal_and_wait(SIGTERM);
// FALLTHROUGH
case OPERATION_START:
{
struct PidVector pv = {};
if (find_all(EJ_COMPILE_PROGRAM, &pv) < 0) {
system_error("cannot enumerate processes");
}
if (pv.u > 0) {
printf("%s already running as:", EJ_COMPILE_PROGRAM);
for (int i = 0; i < pv.u; ++i) {
printf(" %d", pv.v[i]);
}
printf("\n");
return EXIT_OPERATION_FAILED;
}
for (int i = 0; i < compile_parallelism; ++i) {
int ret = start_process(config, EJ_COMPILE_PROGRAM, log_fd, workdir, &ev, ej_compile_path, compile_parallelism > 1, 1 /* FIXME */, ejudge_xml_fd);
if (ret < 0) {
emergency_stop();
return EXIT_SYSTEM_ERROR;
}
}
int sleep_count = 0;
// wait 1s max
while (sleep_count < START_WAIT_COUNT) {
pv_free(&pv);
usleep(100000);
if (find_all(EJ_COMPILE_PROGRAM, &pv) < 0) {
system_error("cannot enumerate processes");
}
if (pv.u == compile_parallelism) break;
++sleep_count;
}
if (sleep_count >= START_WAIT_COUNT) {
system_error("failed to start ej-compile, please see the logs");
}
}
break;
case OPERATION_STOP:
signal_and_wait(SIGTERM);
break;
case OPERATION_KILL:
signal_and_wait(SIGKILL);
break;
case OPERATION_RESTART:
{
struct PidVector pv = {};
if (find_all(EJ_COMPILE_PROGRAM, &pv) < 0) {
system_error("cannot enumerate processes");
}
if (pv.u <= 0) {
return EXIT_OPERATION_FAILED;
}
kill_all(SIGHUP, &pv);
}
break;
case OPERATION_STATUS:
{
struct PidVector pv = {};
if (find_all(EJ_COMPILE_PROGRAM, &pv) < 0) {
system_error("cannot enumerate processes");
}
if (pv.u > 0) {
for (int i = 0; i < pv.u; ++i) {
if (i > 0) putchar(' ');
printf("%d", pv.v[i]);
}
printf("\n");
} else {
return EXIT_OPERATION_FAILED;
}
}
break;
default:
system_error("unhandled operation %d", op);
}
}
#if 0
#include "ejudge/config.h"
#include "ejudge/ej_types.h"
#include "ejudge/version.h"
#include "ejudge/ejudge_cfg.h"
#include "ejudge/pathutl.h"
#include "ejudge/serve_state.h"
#include "ejudge/prepare.h"
#include "ejudge/compile_packet.h"
#include "ejudge/fileutl.h"
#include "ejudge/startstop.h"
#include "ejudge/packet_name.h"
#include "ejudge/xalloc.h"
#include "ejudge/logger.h"
#include "ejudge/osdeps.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
/*
* usage: ej-compile-control COMMAND CONFIG
* COMMAND is one of `stop', `restart', `status'
*/
static const unsigned char *program_name = "";
static void startup_error(const char *format, ...)
__attribute__((format(printf, 1, 2), noreturn));
static void
startup_error(const char *format, ...)
{
va_list args;
char buf[1024];
va_start(args, format);
vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
fprintf(stderr, "%s: %s\n Use --help option for help.\n", program_name,
buf);
exit(1);
}
static void op_error(const char *format, ...)
__attribute__((format(printf, 1, 2), noreturn));
static void
op_error(const char *format, ...)
{
va_list args;
char buf[1024];
va_start(args, format);
vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
fprintf(stderr, "%s: %s\n", program_name, buf);
exit(1);
}
static void write_help(void) __attribute__((noreturn));
static void
write_help(void)
{
printf("%s: ej-compile control utility\n"
"Usage: %s [OPTIONS] COMMAND [EJUDGE-XML-PATH]\n"
" OPTIONS:\n"
" --help write message and exit\n"
" --version report version and exit\n"
" COMMAND:\n"
" stop stop the ej-compile\n"
" restart restart the ej-compile\n"
/*" status report the ej-compile status\n"*/,
program_name, program_name);
exit(0);
}
static void write_version(void) __attribute__((noreturn));
static void
write_version(void)
{
printf("%s %s, compiled %s\n", program_name, compile_version, compile_date);
exit(0);
}
struct serve_state serve_state;
int
main(int argc, char *argv[])
{
int i = 1;
const char *command = 0;
const char *ejudge_xml_path = 0;
struct ejudge_cfg *config = 0;
path_t pkt_path;
int tot_wait = 0, cur_wait = 0;
const char *config_path = 0;
const char *conf_suffix = 0;
const unsigned char *compile_home_dir = 0;
path_t config_path_buf;
path_t cpp_opts = {0};
int cmd = 0, signum = 0;
struct compile_request_packet cp;
void *pkt_buf = 0;
size_t pkt_len = 0;
unsigned char pkt_name[64];
const unsigned char *signame = 0;
unsigned char cmdstr[1024];
int pid_count = 0;
int *pids = NULL;
logger_set_level(-1, LOG_WARNING);
program_name = os_GetBasename(argv[0]);
if (argc < 2) startup_error("not enough parameters");
if (!strcmp(argv[i], "--help")) {
write_help();
} else if (!strcmp(argv[i], "--version")) {
write_version();
}
command = argv[i];
i++;
if (i < argc) {
config_path = argv[i];
i++;
}