有没有可以读取2g以上文件的方法？ 谢谢了

最近在看APUE，lseek不太明白，请大牛讲讲，谢谢

为什么我的lseek老是出错？请高手指点，谢谢！ 错误提示：Invalid argument 代码如下： #include #include #define PATHSIZE 1024 #define BUFFSIZE 1024 int main() { int ret; int filedes; ssize_t size; off_t off; char pathname[PATHSIZE]; char buf[BUFFSIZE]; strcpy(pathname, "test.txt"); filedes = open(pathname, O_RDONLY); if(filedes == -1) { printf("open fail!\n"); ...

offset=0x7fffffff+1; lseek(fd,offset,0); error: Invalid argument. how to fix it?

how to set _FILE_OFFSET_BITS=64? need make kernel again?

#include #include #include int main(void) { int fd; char buf[20]; int size; off_t location; char * filename = "tt.dat"; if( (fd = open(filename,O_RDWR | O_CREAT | O_TRUNC)) == -1){ perror("open"); return 1; } size = write(fd,"Hello C Programming!\n",20); if(size...

int fd; offset_t offset; fd=open("/dev/dsk/c0t1d0s7",O_RDONLY); offset=0x7fffffff+(offset_t)1; lseek64(fd,offset,0); error messages: lseek error, invalid argument. errno:22 if change /dev/dsk/c0t1d0s7 with a large file name(>;2g), it works. how to fix it?

每个打开文件都有一个与其相关联的“当前文件位移量”。它是一个非负整数，用以度量从文件开始处计算的字节数。通常，读、写操作都从当前文件位移量处开始，并使位移量增加所读或写的字节数。按系统默认，当打开一个文件时，除非指定O_APPEND选择项，否则该位移量被设置为0。 可以调用l s e e k显式地定位一个打开文件。 #include #include off_t lseek(int filedes, off_t offset, int whence) ; ...

我写了一个双机传输程序。里面有段代码是这样的 Server： ........ off_t curoff, *datbufp; char datbuf[BUFSIZE * 4 + sizeof(off_t)]; char *iovbufp; ......... iovbufp = &datbuf[sizeof(off_t)]; curoff = lseek(fd, 0L, SEEK_CUR); readn = read(fd, iovbufp, jobsize.ps_end - curoff); *(off_t *)datbuf = curoff; if((writen = send(sockfd, datbuf, rea...

#define _LARGEFILE_SOURCE #define _LARGEFILE64_SOURCE #define _FILE_OFFSET_BITS 64 #include #include #include #include #include int main() { printf("sizeof(off_t) = %d\n", sizeof(off_t)); int fd = 0; #if 0 fd = open("test", O_WRONLY | O_CREAT | O_LARGEFILE, 0600); #else fd = open("/dev/hda1", O_RDONLY, 0600); #endif ...