I've seen some posts relating to my question, but none that address it completely. I need to create a file in the standard temporary directory and after I'm done writing to it, move it to a different location. The idea is that the file is considered temporary while being downloaded and permanent after downloading completes.
我看过一些与我的问题有关的帖子，但没有一个完全解决它。我需要在标准临时目录中创建一个文件，在我写完文件后，将其移动到其他位置。这个想法是文件在下载时被认为是临时的，在下载完成后是永久性的。
I'm attempting this by calling either mkstemp or tmpfile, then rename after I'm done writing to it. However, I need the full path of the file to call rename, and apparently getting the file name from a file descriptor (returned by mkstemp) or FILE * (returned by tmpfile) is no trivial process. It can be done, but it's not elegant.
我是通过调用mkstemp或tmpfile来尝试这个，然后在我写完之后重命名。但是，我需要文件的完整路径来调用重命名，显然从文件描述符（由mkstemp返回）或FILE *（由tmpfile返回）获取文件名不是一个简单的过程。它可以做到，但它并不优雅。
Is there a system call that will create a temporary file and provide me with the name? I know about mktemp and related calls, but they either aren't guaranteed to be unique or are deprecated. Or perhaps there is a better way to accomplish creating, writing to, and moving temporary files.
是否有系统调用会创建一个临时文件并为我提供名称？我知道mktemp和相关的调用，但它们要么不保证是唯一的，要么被弃用。或者可能有更好的方法来完成创建，写入和移动临时文件。
1 个解决方案
#1
13
It looks like mkstemp is actually the way to go.
看起来mkstemp实际上是要走的路。
int fd;
char name[] = "/tmp/fileXXXXXX";
fd = mkstemp(name);
/* Check fd. */
After this call you have a valid descriptor in fd and the name of the associated file in name.
在此调用之后，您在fd中有一个有效的描述符，并且名称中包含相关文件的名称。
#1
13
It looks like mkstemp is actually the way to go.
看起来mkstemp实际上是要走的路。
int fd;
char name[] = "/tmp/fileXXXXXX";
fd = mkstemp(name);
/* Check fd. */
After this call you have a valid descriptor in fd and the name of the associated file in name.
在此调用之后，您在fd中有一个有效的描述符，并且名称中包含相关文件的名称。