Question

我正在QProcess中运行GNU find，它运行得很好。然而，当我尝试将它与grep结合使用时，它根本不会执行。

QProcess以

开头

process->start(findpattern.replace("~",QDir::home().absolutePath()), QProcess::Unbuffered | QProcess::ReadWrite);

当findpattern是例如

find "~/Downloads" -name "*.cpp"

这很好用。但对于例如查找包含“else”的所有cpp文件

find "~/Downloads" -name "*.cpp" -exec grep -l "else" {} \;

失败

我做错了什么？

Answer 1

{} \;中反斜杠的目的是shell不会将分号解释为下一个命令的分隔符。 shell将删除此反斜杠，而不会传递给find。

但QProcess直接运行find，而不是通过shell运行，因此反斜杠不应该在那里。

来自find的联机帮助页：

   -exec command ;
          Execute command; true if 0 status is returned.  All following arguments to
          find are taken to be arguments to the command until an argument consisting
          of `;' is encountered.  The string `{}' is replaced by  the  current  file
          name being processed everywhere it occurs in the arguments to the command,
          not just in arguments where it is alone, as  in  some  versions  of  find.
          Both  of  these  constructions  might  need  to be escaped (with a `\') or
          quoted to protect them from expansion by the shell

从QProcess中找到GNU - 不能使用exec参数

1 个答案: