57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
// vim:ts=8:expandtab
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#include <stdbool.h>
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#include <glob.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifndef LINUX
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/* TODO: correctly check for *BSD */
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/resource.h>
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#endif
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#include "i3status.h"
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/*
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* Checks if the PID in path is still valid by checking:
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* (Linux) if /proc/<pid> exists
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* (NetBSD) if sysctl returns process infos for this pid
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*
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*/
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bool process_runs(const char *path) {
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char pidbuf[16];
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static glob_t globbuf;
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int fd;
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memset(pidbuf, 0, sizeof(pidbuf));
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if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
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die("glob() failed\n");
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fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
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globfree(&globbuf);
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if (fd < 0)
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return false;
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(void)read(fd, pidbuf, sizeof(pidbuf));
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(void)close(fd);
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#if defined(LINUX) || defined(__GNU__) || defined(__GLIBC__)
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struct stat statbuf;
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char procbuf[512];
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(void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
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return (stat(procbuf, &statbuf) >= 0);
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#else
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/* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */
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struct kinfo_proc info;
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size_t length = sizeof(struct kinfo_proc);
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int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) };
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if (sysctl(mib, 4, &info, &length, NULL, 0) < 0)
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return false;
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return (length != 0);
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#endif
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}
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