so if I do: dup2(0, backup); // backup stdin dup2(somefile, 0); // somefile has four lines of co开发者_高级运维ntent
I want to use dup2 to read from input file and redirect it to the input of exec function. but my problem is i have three running 开发者_StackOverflowprocess all of them have to open same input file bu
《二十不惑》、《三十而已》是宁蒙影业出品的电视剧。两部剧都是女团剧。前者关注的是同宿舍四个大四女生的生活，后者关注的是三个30的女生的生活。显然，这两出戏看起来很相似。为什么《二十不惑》的话题度远低于《
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