c执行shell命令并返回进程pid

主要通过posix_spawn实现

#include 
#include 
 
#include 
#include 
#include 
 
extern char **environ;
 
void run_cmd(char *cmd)
{
    pid_t pid;
    char *argv[] = {"sh", "-c", cmd, NULL};
    int status;
    printf("Run command: %sn", cmd);
    status = posix_spawn(&pid, "/bin/sh", NULL, NULL, argv, environ);
    if (status == 0) {
        printf("Child pid: %in", pid);
        if (waitpid(pid, &status, 0) != -1) {
            printf("Child exited with status %in", status);
        } else {
            perror("waitpid");
        }
    } else {
        printf("posix_spawn: %sn", strerror(status));
    }
}
 
int main(int argc, char* argv[])
{
    run_cmd("nohup /mnt/c/Ubuntu/3138/xxxxxsh ");
    return 0;
}