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我需要打印一條消息,通知用戶進程已從內核調用sys_fork分叉。 我在sys_fork()函數中添加了命令printf("process forked\n");
,但沒有發生任何事情。 這是正確的還是我必須做別的?任何幫助?Minix sys_fork()打印消息
代碼
#include "syslib.h"
PUBLIC int sys_fork(parent, child, child_endpoint, map_ptr, flags, msgaddr)
endpoint_t parent; /* process doing the fork */
endpoint_t child; /* which proc has been created by the fork */
endpoint_t *child_endpoint;
struct mem_map *map_ptr;
u32_t flags;
vir_bytes *msgaddr;
{
/* A process has forked. Tell the kernel. */
message m;
int r;
m.PR_ENDPT = parent;
m.PR_SLOT = child;
m.PR_MEM_PTR = (char *) map_ptr;
m.PR_FORK_FLAGS = flags;
r = _kernel_call(SYS_FORK, &m);
*child_endpoint = m.PR_ENDPT;
*msgaddr = (vir_bytes) m.PR_FORK_MSGADDR;
printf("process forked\n"); //the modification I made
return r;
}
此內容只適用於English閱讀打開。 = d –
Ανκαταφέρειςκαιλύσειςτο3個ρίξεκανα尖端:P –
χαχαχλωμοτοβλεπωνατολυνω..:P –