-// vim:ts=8:expandtab
+// vim:ts=4:sw=4:expandtab
#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 <errno.h>
+#include <signal.h>
#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
+ * Checks if the PID in path is still valid by sending signal 0 (does not do
+ * anything). kill() will return ESRCH if the process does not exist and 0 or
+ * EPERM (depending on the uid) if it exists.
+ *
+ * If multiple files match the glob pattern, all of them will be checked until
+ * the first running process is found.
*
*/
bool process_runs(const char *path) {
- char pidbuf[16];
- static glob_t globbuf;
- int fd;
- memset(pidbuf, 0, sizeof(pidbuf));
+ static char pidbuf[16];
+ static glob_t globbuf;
+ 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);
+ if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
+ die("glob() failed\n");
+ if (globbuf.gl_pathc == 0) {
+ /* No glob matches, the specified path does not contain a wildcard. */
globfree(&globbuf);
- if (fd < 0)
- return false;
- (void)read(fd, pidbuf, sizeof(pidbuf));
- (void)close(fd);
+ if (!slurp(path, pidbuf, sizeof(pidbuf)))
+ return false;
+ return (kill(strtol(pidbuf, NULL, 10), 0) == 0 || errno == EPERM);
+ }
+ for (size_t i = 0; i < globbuf.gl_pathc; i++) {
+ if (!slurp(globbuf.gl_pathv[i], pidbuf, sizeof(pidbuf))) {
+ globfree(&globbuf);
+ return false;
+ }
+ if (kill(strtol(pidbuf, NULL, 10), 0) == 0 || errno == EPERM) {
+ globfree(&globbuf);
+ return true;
+ }
+ }
+ globfree(&globbuf);
-#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
+ return false;
}