macos - 如何获取 OS X 上进程的完整路径？

Question

我知道我可以使用 ps 获取进程的 PID，但是如何找到该进程的完整路径？

Answer 1

OS X has the libproc library, which can be used to gather different process informations. In order to find the absolute path for a given PID, the following code can be used:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <libproc.h>

int main (int argc, char* argv[])
{
    pid_t pid; int ret;
    char pathbuf[PROC_PIDPATHINFO_MAXSIZE];

    if ( argc > 1 ) {
        pid = (pid_t) atoi(argv[1]);
        ret = proc_pidpath (pid, pathbuf, sizeof(pathbuf));
        if ( ret <= 0 ) {
            fprintf(stderr, "PID %d: proc_pidpath ();\n", pid);
            fprintf(stderr, "    %s\n", strerror(errno));
        } else {
            printf("proc %d: %s\n", pid, pathbuf);
        }
    }

    return 0;
}

编译和运行示例(上面的代码存储在pathfind.c中，32291是我试图查找路径信息的进程的pid):

$ cc pathfind.c -o pathfind
$ ./pathfind 32291
proc 32291: /some/path/your-binary-app

请参阅此博文: http://astojanov.wordpress.com/2011/11/16/mac-os-x-resolve-absolute-path-using-process-pid/