问题
I'm trying to install discount on my VPS which is based on Solaris and compiling works great after setting some environment variables but the install fails.
So I thought I'd do the install manually, but what does install really do? Is it simply a mv followed by a chmod? Is it magic? That error seems to show that it attempts to do a lot of searching for files all over?
Can I just copy the binary, library and header files as usual?
Googling "install" doesn't give me much relevant information so I appreciate any clarification I can get!
回答1:
According to man install:
install [OPTION]... [-T] SOURCE DEST` install [OPTION]... SOURCE... DIRECTORY install [OPTION]... -t DIRECTORY SOURCE... install [OPTION]... -d DIRECTORY...In the first three forms, copy SOURCE to DEST or multiple SOURCE(s) to the existing DIRECTORY, while setting permission modes and owner/group. In the 4th form, create all components of the given DIRECTORY(ies).
As for the difference to using cp, according to install vs. cp; and mmap, install unlinks the existing file, creating a new one linked to the same spot.
This has the advantage that, if the file you're trying to overwrite is a currently running program, it can continue running, as the file being written is in fact in a new location, and the existing program code is still in the old one.
A cp simply tries to overwrite the existing file, which will fail if the file is locked due to being in use.
Further information
- install Command
来源：https://stackoverflow.com/questions/4959725/what-does-usr-sbin-install-really-do