#include
#include
#include
#include
#include
#include
int main()
{
int fd;
char *buf;
int i;
struct stat statbuf;
if (stat("test.txt", &statbuf) == -1) {
perror("fail to get stat");
exit(1);
}
fd = open("test.txt", O_WRONLY);
if (fd == -1) {
perror("fail to open");
exit(1);
}
buf = (char *)mmap(NULL, statbuf.st_size, PROT_WRITE, MAP_PRIVATE, fd, 0);
if (buf == MAP_FAILED) {
perror("fail to mmap");
exit(1);
}
strcpy(buf, "China beijing");
if (munmap(buf, statbuf.st_size) == -1) {
perror("fail to munmap");
exit(1);
}
close(fd);
return 0;
}
运行后提示为：fail to mmap: Permission denied
是什么原因?
wangpu719 于 2009-10-07 17:38:33发表:
注意你打开文件时的权限;
fd = open(filepath, O_RDWR);