c - c/popen 中的 bash 找不到我的脚本

Question

我尝试使用 popen 从 C 程序执行我的 bash 脚本 (tes02.sh)。但是当我运行程序时，我收到消息:./tes02.sh:找不到这是程序:

 #include <stdio.h>

#define LINE_BUFSIZE 128

int main(int argc, char *argv[])
{
    char line[LINE_BUFSIZE];
    int linenr;
    FILE *pipe;

    /* Get a pipe where the output from the scripts comes in */
    pipe = popen("./tes02.sh", "r");
    if (pipe == NULL) {  /* check for errors */
        perror(argv[0]); /* report error message */
        return 1;        /* return with exit code indicating error */
    }

    /* Read script output from the pipe line by line */
    linenr = 1;
    while (fgets(line, LINE_BUFSIZE, pipe) != NULL) {
        printf("Script output line %d: %s", linenr, line);
        ++linenr;
    }

    /* Once here, out of the loop, the script has ended. */
    pclose(pipe); /* Close the pipe */
    return 0;     /* return with exit code indicating success. */
}

我的脚本的目录是:/home/pi我应该进入目录吗？如果是的话，请问我该怎么做...谢谢

Answer 1

我会首先检查该文件是否存在于您的当前目录中:

if ( 0 != access( "./tes02.sh", F_OK ) )
{ 
    fprintf ( stderr, "File tes02.sh does NOT exist in curdir\n" );
    return -1; // return code - normally I return negative codes for errors
}
/* Get a pipe where the output from the scripts comes in */
pipe = popen("./tes02.sh", "r");
if (pipe == NULL) {  /* check for errors */
    perror(argv[0]); /* report error message */
    return 1;        /* return with exit code indicating error */
}

(...程序的其余部分...)