#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv) {
    const auto cmd = "./subdir/entry.sh";
    FILE *f = popen(cmd, "r");
    if (f == NULL) {
        perror("popen failed");
        return EXIT_FAILURE;
    }
    char buf[1024];
    while (fgets(buf, sizeof(buf), f)) {
        printf("read: %s", buf);
    }

    int ret = pclose(f);
    if (ret == -1) {
        perror("pclose failed");
        return EXIT_FAILURE;
    };
    printf("Return code: %d", ret);
    return EXIT_SUCCESS;
}