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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "logctl.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#include <cstring>
#include <vespa/log/log.h>
LOG_SETUP(".sentinel.logctl");
namespace config::sentinel {
void justRunLogctl(const char *cspec, const char *lspec)
{
const char *progName = "vespa-logctl";
pid_t pid = fork();
if (pid == 0) {
LOG(debug, "running '%s' '%s' '%s'", progName, cspec, lspec);
int devnull = open("/dev/null", O_WRONLY);
if (devnull > 1) {
dup2(devnull, 1);
close(devnull);
}
int rv = execlp(progName, progName, "-c", cspec, lspec, nullptr);
if (rv != 0) {
LOG(warning, "execlp of '%s' failed: %s", progName, strerror(errno));
}
} else if (pid > 0) {
bool again;
do {
again = false;
int wstatus = 0;
pid_t got = waitpid(pid, &wstatus, 0);
if (got == pid) {
again = false;
if (WIFEXITED(wstatus)) {
int exitCode = WEXITSTATUS(wstatus);
if (exitCode != 0) {
LOG(warning, "running '%s' failed (exit code %d)", progName, exitCode);
}
} else if (WIFSIGNALED(wstatus)) {
int termSig = WTERMSIG(wstatus);
LOG(warning, "running '%s' failed (got signal %d)", progName, termSig);
} else {
LOG(warning, "'%s' failure (wait status was %d)", progName, wstatus);
}
} else if (errno == EINTR) {
again = true;
} else {
LOG(error, "waitpid() failed: %s", strerror(errno));
}
} while (again);
} else {
LOG(error, "fork() failed: %s", strerror(errno));
}
}
}
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