exec fork vim 編譯 運行 .c/.cpp

如果需要傳入參數，NULL之前傳入 *++argv

execl不加路徑也可以，默認是當前工作路徑下

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>

int main(int argc, char **argv) {
    pid_t pid;
    char filename[512] = {0};
    char o_name[512] = {0};
    char f_type[256] = {0};
    char *sub;
    char cmd[512] = {0};

    if (argc < 2) {
        fprintf(stderr, "Usage: %s filename arg...\n", argv[0]);
        return 1;
    }
    
    strcpy(filename, argv[1]);
    sub = strrchr(filename, '.');
    strncpy(o_name, filename, sub - filename);
    strcpy(f_type, sub);
    
    if (!strcmp(f_type, ".c")) {
        strcpy(cmd, "gcc");
    }
    else if (!strcmp(f_type, ".cpp")) {
        strcpy(cmd, "g++");
    }
    else {
        fprintf(stderr, "Not support File Type!\n");
        return 2;
    }

    if ((pid = fork()) < 0) {
        perror("fork");
        return 3;
    }
    if (pid == 0) {
        execlp("vim", "vim", filename, NULL);
    }
    wait(NULL);
    
    if ((pid = fork()) < 0) {
        perror("fork");
        return 3;
    }
    if (pid == 0) {
        execlp(cmd, cmd, filename, "-o", o_name, NULL);// gcc filename -o filename
    }
    int status;
    wait(&status);
    if (status == 0) {
        char name[256] = {0};
        sprintf(name, "./%s", o_name);
        execl(name, o_name, NULL);
    }
    else {
        printf("Compile Failed!\n");
        return 4;
    }
    
    return 0;
}