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#include <sys/socket.h>
#include <sys/un.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
int
check(const char *path, const char *service)
{
struct sockaddr_un addr = { 0 };
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, path, sizeof addr.sun_path - 1);
int connfd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (connfd < 0) {
perror("socket");
exit(111);
}
if (connect(connfd, (struct sockaddr *)&addr, sizeof addr) < 0) {
perror("connect");
exit(111);
}
write(connfd, "s", 1);
// XXX what if too low?
char buf[4096];
ssize_t rd = read(connfd, buf, sizeof buf);
if (rd < 0) {
perror("read");
exit(111);
}
char *p;
char *f = strstr(buf, service);
if (f && (f == buf || f[-1] == '\n') &&
f[strlen(service)+1] == ' ' &&
(p = strstr(f, "pid="))) {
p += 4;
printf("found pid %c\n", p[0]);
if (isdigit(p[0])) {
close(connfd);
return 1; // has pid >= 0
}
}
// XXX fix multiple strstr matches
close(connfd);
return 0;
}
int
main(int argc, char *argv[])
{
if (argc < 2 || (
strcmp(argv[1], "l") != 0 && strcmp(argv[1], "level") != 0 &&
strcmp(argv[1], "s") != 0 && strcmp(argv[1], "status") != 0 &&
strcmp(argv[1], "d") != 0 && strcmp(argv[1], "down") != 0 &&
strcmp(argv[1], "u") != 0 && strcmp(argv[1], "up") != 0 &&
strcmp(argv[1], "p") != 0 && strcmp(argv[1], "pause") != 0 &&
strcmp(argv[1], "c") != 0 && strcmp(argv[1], "cont") != 0 &&
strcmp(argv[1], "h") != 0 && strcmp(argv[1], "hup") != 0 &&
strcmp(argv[1], "a") != 0 && strcmp(argv[1], "alarm") != 0 &&
strcmp(argv[1], "i") != 0 && strcmp(argv[1], "interrupt") != 0 &&
strcmp(argv[1], "q") != 0 && strcmp(argv[1], "quit") != 0 &&
strcmp(argv[1], "t") != 0 && strcmp(argv[1], "term") != 0 &&
strcmp(argv[1], "k") != 0 && strcmp(argv[1], "kill") != 0 &&
strcmp(argv[1], "1") != 0 &&
strcmp(argv[1], "2") != 0 &&
strcmp(argv[1], "start") != 0 &&
strcmp(argv[1], "stop") != 0 &&
strcmp(argv[1], "Restart") != 0 &&
strcmp(argv[1], "Shutdown") != 0)) {
dprintf(2, "usage: rvnitctl COMMAND [SERVICE]\n");
exit(2);
}
static const char default_sock[] = "/run/rvnit/rvnit.sock";
const char *path = getenv("RVNIT_SOCK");
if (!path || !*path)
path = default_sock;
struct sockaddr_un addr = { 0 };
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, path, sizeof addr.sun_path - 1);
int connfd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (connfd < 0) {
perror("socket");
exit(111);
}
if (connect(connfd, (struct sockaddr *)&addr, sizeof addr) < 0) {
perror("connect");
exit(111);
}
char cmd = argv[1][0];
if (strcmp(argv[1], "start") == 0 && argv[2])
cmd = 'u';
else if (strcmp(argv[1], "stop") == 0 && argv[2])
cmd = 'd';
dprintf(connfd, "%c%s", cmd, argv[2] ? argv[2] : "");
int status = 1;
ssize_t rd;
do {
char buf[4096];
rd = read(connfd, buf, sizeof buf);
if (rd < 0) {
perror("read");
exit(111);
}
if (rd > 0)
status = 0;
write(1, buf, rd);
} while (rd > 0);
if (strcmp(argv[1], "start") == 0 && argv[2]) {
int i;
int up = 0;
for (i = 7*4; i > 0; i--) {
if (check(path, argv[2])) {
if (++up >= 2)
break;
} else {
up = 0;
}
nanosleep(&(struct timespec){0, 250000000}, 0);
}
if (up < 2) {
fprintf(stderr, "start failed\n");
return 1;
}
} else if (strcmp(argv[1], "stop") == 0 && argv[2]) {
int i;
int down = 0;
for (i = 7*4; i > 0; i--) {
if (!check(path, argv[2])) {
if (++down >= 2)
break;
} else {
down = 0;
}
nanosleep(&(struct timespec){0, 250000000}, 0);
}
if (down < 2) {
fprintf(stderr, "stop failed\n");
return 1;
}
}
return status;
}
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