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#include <stdbool.h>
#include <glob.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef LINUX
/* TODO: correctly check for *BSD */
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/resource.h>
#endif
#include "i3status.h"
/*
* Checks if the PID in path is still valid by checking:
* (Linux) if /proc/<pid> exists
* (NetBSD) if sysctl returns process infos for this pid
*
*/
bool process_runs(const char *path) {
char pidbuf[16];
static glob_t globbuf;
int fd;
memset(pidbuf, 0, sizeof(pidbuf));
if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
die("glob() failed\n");
fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
globfree(&globbuf);
if (fd < 0)
return false;
(void)read(fd, pidbuf, sizeof(pidbuf));
(void)close(fd);
#ifdef LINUX
struct stat statbuf;
char procbuf[512];
(void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
return (stat(procbuf, &statbuf) >= 0);
#else
/* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */
struct kinfo_proc info;
size_t length = sizeof(struct kinfo_proc);
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) };
if (sysctl(mib, 4, &info, &length, NULL, 0) < 0)
return false;
return (length != 0);
#endif
}
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