linux - 软链接(soft link)vimdiff是如何实现的

Question

我发现 vimdiff 实用程序只是 vim 的软链接(soft link)。两者都位于我的 Suse11 框中的 /usr/bin/ 下。 vimdfiff 是 vim 的软链接(soft link)。有趣的是，vimdiff file1 file2 实际上等同于 vim -d file1 file2，所以在那感觉，-d 选项自动嵌入到软链接(soft link)中，所以我的问题很简单怎么办？

Answer 1

Vim 在其 main() 函数中使用 argv[0] 来区分其可执行文件名 vim 或 vimdiff, 或等等

Link to vim main.c执行此检查以区分 rvim、rview、gvim、gview、vimdiff , gvimdiff, ex, exim.

/*
 * Check for: [r][e][g][vi|vim|view][diff][ex[im]]
 * If the next character is "e" we run in Easy mode.
 * If the next character is "g" we run the GUI version.
 * If the next characters are "view" we start in readonly mode.
 * If the next characters are "diff" or "vimdiff" we start in diff mode.
 * If the next characters are "ex" we start in Ex mode.  If it's followed
 * by "im" use improved Ex mode.
 */