#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <libgen.h>
int main(int argc, const char *argv[])
{
//current filepath (dir + name)
const char* file_path = argv[0];
//extract filename component (needed to append to newdir)
char* file_name_ = strdup(file_path);
char* file_name = basename(file_name_);
//make new path name
char* new_dir = "<put your destination here - with no slash ('/') at the end>";
size_t new_path_len = strlen(new_dir) + strlen(file_name) + 2; //two extra bytes: '/' + '\0'
char new_path[new_path_len];
snprintf(new_path, new_path_len, "%s/%s", new_dir, file_name);
//make a new name for a file (hardlink)
link(file_path, new_path);
//delete a name and possibly the file it refers to
unlink(file_path);
//cleanup
free(file_name_);
return 0;
}
The code below "copies" itself to a new destination and gets deleted after termination. Basically, the code makes a new entry (hardlink) at the specified location and removes the current one (from the calling directory). The contents of the file will be preserved, since there is no copy and deletion involved.
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <libgen.h>
int main(int argc, const char *argv[])
{
//current filepath (dir + name)
const char* file_path = argv[0];
//extract filename component (needed to append to newdir)
char* file_name_ = strdup(file_path);
char* file_name = basename(file_name_);
//make new path name
char* new_dir = "<put your destination here - with no slash ('/') at the end>";
size_t new_path_len = strlen(new_dir) + strlen(file_name) + 2; //two extra bytes: '/' + '\0'
char new_path[new_path_len];
snprintf(new_path, new_path_len, "%s/%s", new_dir, file_name);
//make a new name for a file (hardlink)
link(file_path, new_path);
//delete a name and possibly the file it refers to
unlink(file_path);
//cleanup
free(file_name_);
return 0;
}
Hint: careful study of the documenation to link is highly recommended (especially the ERRORS section).
References:
basename - parse pathname components link - make a new name for a file unlink - delete a name and possibly the file it refers to
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评论（1）
下面的代码“复制”到新目的地，并在终止后删除。基本上，代码在指定的位置进行了新的条目（硬链接），并删除当前的位置（从调用目录）。由于不涉及副本和删除，因此将保留文件的内容。
提示：强烈建议对
link的文档进行仔细研究（尤其是错误部分）。参考：
basename - parse parse pathname组件
link - 为文件
创建一个新名称
unlink - - 删除一个名称，可能是指它所转到的文件
The code below "copies" itself to a new destination and gets deleted after termination. Basically, the code makes a new entry (hardlink) at the specified location and removes the current one (from the calling directory). The contents of the file will be preserved, since there is no copy and deletion involved.
Hint: careful study of the documenation to
linkis highly recommended (especially the ERRORS section).References:
basename - parse pathname components
link - make a new name for a file
unlink - delete a name and possibly the file it refers to