帮忙,此代码为什么不能编译?

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cwqing1973
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帮忙,此代码为什么不能编译?

#1

帖子 cwqing1973 » 2008-09-07 20:50

代码如下:
#include <stdlib.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

int main(int argc, char *argv[])

{

int fd;

struct flock fl;

fd = open("testfile", O_RDWR);

if (fd == –1)

/* Handle error */;

/* Make a non-blocking request to place a write lock on bytes 100–109 of testfile */

{

fl.l_type = F_WRLCK;

fl.l_whence = SEEK_SET;

fl.l_start = 100;

fl.l_len = 10;

}



if (fcntl(fd, F_SETLK, &fl) == –1)

{

if (errno == EACCES || errno == EAGAIN) {

printf("Already locked by another process\n");

/* We can't get the lock at the moment */

} else {

/* Handle unexpected error */;

}

} else { /* Lock was granted... */



/* Perform I/O on bytes 100 to 109 of file */



/* Unlock the locked bytes */

fl.l_type = F_UNLCK;

fl.l_whence = SEEK_SET;

fl.l_start = 100;

fl.l_len = 10;

if (fcntl(fd, F_SETLK, &fl) == –1)

/* Handle error */;

}

exit(EXIT_SUCCESS);

}


我的机子安装的是Ubuntu,cup是64位的AMD的
cwqing1973@cwqing1973-desktop:~$ gcc -v
使用内建 specs。
目标:x86_64-linux-gnu
配置为:../src/configure -v --enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
线程模型:posix
gcc 版本 4.2.3 (Ubuntu 4.2.3-2ubuntu7)
cwqing1973@cwqing1973-desktop:~$
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