Linux內核編程

Question

我要趕管道（）系統調用，所以我改變了pipe.c源代碼

static pipe_hook_t pipe_hook; 
pipe_hook_t set_pipe_hook(pipe_hook_t hook) 
{ 
    pipe_hook_t old_hook = pipe_hook; 
    pipe_hook = hook; 
    printk(KERN_INFO, "pipe hook: %p", hook); 
    return old_hook; 
} 

EXPORT_SYMBOL_GPL(set_pipe_hook); 

然後我試圖定義文件syscalls.h pipe_hook_t（包含在pipe.c ）

typedef void (*pipe_hook_t)(int *filedes); 
pipe_hook_t set_pipe_hook(pipe_hook_t hook); 

，我有錯誤：

fs/pipe.c:1130: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘pipe_hook’ 
fs/pipe.c:1131: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘set_pipe_hook’ 
fs/pipe.c:1138: error: ‘set_pipe_hook’ undeclared here (not in a function) 
fs/pipe.c:1138: warning: type defaults to ‘int’ in declaration of ‘set_pipe_hook’ 
fs/pipe.c: In function ‘sys_pipe2’: 
fs/pipe.c:1153: error: ‘pipe_hook’ undeclared (first use in this function) 
fs/pipe.c:1153: error: (Each undeclared identifier is reported only once 
fs/pipe.c:1153: error: for each function it appears in.) 
fs/pipe.c:1154: error: implicit declaration of function ‘pipe_hook’ 

我一直在努力，也創造我自己的.h文件並定義pipe_hook_t但呃ror是一樣的

Answer 1

問題已解決。我只是混淆了頭文件所在的目錄。