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#include <unistd.h>
#include "strerr.h"
#include "error.h"
#include "sgetopt.h"
#include "scan.h"
#include "open.h"
#include "tai.h"
#include "buffer.h"
#define FATAL "svwaitdown: fatal: "
#define WARN "svwaitdown: warning: "
#define INFO "svwaitdown: "
#define USAGE " [-v] [-t 1..6000] service ..."
#define VERSION "$Id: 6cd3efc2e15e5e3d2fa60cd0c028e60958676ec7 $"
const char *progname;
const char * const *dir;
unsigned int rc =0;
void fatal(const char *m) { strerr_die3sys(111, FATAL, m, ": "); }
void warn(const char *s1, const char *s2, struct strerr *e) {
dir++; rc++;
strerr_warn3(WARN, s1, s2, e);
}
void usage() { strerr_die4x(1, "usage: ", progname, USAGE, "\n"); }
int main(int argc, const char * const *argv) {
int opt;
unsigned long sec =600;
int verbose =0;
int doexit =0;
int dokill =0;
int wdir;
int fd;
char status[20];
int r;
unsigned long pid;
struct tai start;
struct tai now;
progname =*argv;
while ((opt =getopt(argc, argv, "t:xkvV")) != opteof) {
switch(opt) {
case 't':
scan_ulong(optarg, &sec);
if ((sec < 1) || (sec > 6000)) usage();
break;
case 'x':
doexit =1;
break;
case 'k':
dokill =1;
break;
case 'v':
verbose =1;
break;
case 'V':
strerr_warn1(VERSION, 0);
case '?':
usage();
}
}
argv +=optind;
if (! argv || ! *argv) usage();
if ((wdir =open_read(".")) == -1)
fatal("unable to open current working directory");
for (dir =argv; *dir; ++dir) {
if (dir != argv)
if (fchdir(wdir) == -1) fatal("unable to switch to starting directory");
if (chdir(*dir) == -1) continue; /* bummer */
if ((fd =open_write("supervise/control")) == -1) continue; /* bummer */
if (write(fd, "dx", 1 +doexit) != (1 +doexit)) {
close(fd); continue; /* bummer */
}
close(fd);
}
dir =argv;
tai_now(&start);
while (*dir) {
if (fchdir(wdir) == -1) fatal("unable to switch to starting directory");
if (chdir(*dir) == -1) {
warn(*dir, ": unable to change directory: ", &strerr_sys);
continue;
}
if ((fd =open_write("supervise/ok")) == -1) {
if (errno == error_nodevice) {
if (verbose) strerr_warn3(INFO, *dir, ": runsv not running.", 0);
dir++;
}
else
warn(*dir, ": unable to open supervise/ok: ", &strerr_sys);
continue;
}
close(fd);
if ((fd =open_read("supervise/status")) == -1) {
warn(*dir, "unable to open supervise/status: ", &strerr_sys);
continue;
}
r =buffer_unixread(fd, status, 20);
close(fd);
if ((r < 18) || (r == 19)) { /* supervise compatibility */
if (r == -1)
warn(*dir, "unable to read supervise/status: ", &strerr_sys);
else
warn(*dir, ": unable to read supervise/status: bad format.", 0);
continue;
}
pid =(unsigned char)status[15];
pid <<=8; pid +=(unsigned char)status[14];
pid <<=8; pid +=(unsigned char)status[13];
pid <<=8; pid +=(unsigned char)status[12];
if (! doexit && ! pid) {
/* ok, service is down */
if (verbose) strerr_warn3(INFO, *dir, ": down.", 0);
dir++;
continue;
}
if (status[17] != 'd') { /* catch previous failures */
if ((fd =open_write("supervise/control")) == -1) {
warn(*dir, ": unable to open supervise/control: ", &strerr_sys);
continue;
}
if (write(fd, "dx", 1 +doexit) != (1 +doexit)) {
warn(*dir, ": unable to write to supervise/control: ", &strerr_sys);
close(fd);
continue;
}
close(fd);
}
tai_now(&now);
tai_sub(&now, &now, &start);
if (tai_approx(&now) >= sec) {
/* timeout */
if (verbose) strerr_warn2(INFO, "timeout.", 0);
if (dokill) {
if (chdir(*dir) == -1) {
warn(*dir, ": unable to change directory: ", &strerr_sys);
continue;
}
if ((fd =open_write("supervise/control")) == -1) {
if (errno == error_nodevice) {
if (verbose)
strerr_warn3(INFO, *dir, ": runsv not running.", 0);
dir++;
}
else
warn(*argv, ": unable to open supervise/control: ", &strerr_sys);
continue;
}
if (write(fd, "k", 1) != 1)
warn(*argv, ": unable to write to supervise/control: ", &strerr_sys);
else
strerr_warn3(INFO, *dir, ": killed.", 0);
close(fd);
dir++;
if (! *dir) _exit(111);
continue;
}
_exit(111);
}
sleep(1);
}
if (fchdir(wdir) == -1)
strerr_warn2(WARN, "unable to switch to starting directory: ", &strerr_sys);
close(wdir);
if (rc > 100) rc =100;
_exit(rc);
}
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