学会对文件的记录锁定，及解锁。#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
int main()
{
int fd
int i
struct {
char name[20]
uint ID
int age
} myrec
fd =open("name", O_RDWR|O_CREAT, 0755)
if (fd == -1) return -1
printf("Input your name:") scanf("％s", myrec.name)
printf("Inpute your ID :") scanf("％d", &myrec.ID)
printf("Input your age :") scanf("％d", &myrec.age)
lseek(fd, 0,SEEK_END)
LOCKF(fd, 1, 0)
write(fd, (void *)&myrec, sizeof(myrec))
LOCKF(fd, 0 ,0)
return 0
}
执行命令cc lock.c –o lock.out
Chmod +x lock.out
./lock.out
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记录
上传时间：
2016-01-04
上传用户：亚亚娟娟123
