linux c 获取进程信息

#include <stdio.h>
#include <unistd.h>

int main() {
    pid_t pid, ppid;

    // 获取当前进程的PID
    pid = getpid();
    printf("Current Process ID: %d\n", pid);

    // 获取父进程的PID
    ppid = getppid();
    printf("Parent Process ID: %d\n", ppid);

    return 0;
}

#include <stdio.h>
#include <dirent.h>
#include <string.h>

void print_process_info(pid_t pid) {
    char path[64];
    FILE *statusf;

    snprintf(path, sizeof(path), "/proc/%d/status", pid);
    statusf = fopen(path, "r");
    if (statusf == NULL) {
        perror("fopen");
        return;
    }

    char line[256];
    while (fgets(line, sizeof(line), statusf)) {
        if (strncmp(line, "Name:", 5) == 0 ||
            strncmp(line, "State:", 6) == 0 ||
            strncmp(line, "PPid:", 5) == 0 ||
            strncmp(line, "Uid:", 4) == 0) {
            printf("%s", line);
        }
    }

    fclose(statusf);
}

int main() {
    pid_t pid = getpid();
    print_process_info(pid);
    return 0;
}