Im writing a school assignment in C to search through a file system for directories, regular files and symlinks. For now i use lstat
to get information about items.
So whats the difference between lstat
fstat
and stat
system calls?
fstat() is identical to stat() , except that the file about which information is to be retrieved is specified by a file descriptor (instead of a file name).
The fstat() function shall obtain information about an open file associated with the file descriptor fildes, and shall write it to the area pointed to by buf.
struct stat is a system struct that is defined to store information about files. It is used in several system calls, including fstat, lstat, and stat.
Similarity: They both take filename as arguments.
Difference: Whenever the file name is a symbolic link, stat() returns the attributes or inode information about the target file associated with the link. Whereas, lstat() return the attributes of only the link.
Refer the manpage for stat() vs lstat().
I was also searching for stat vs lstat vs fstat
and although there is already an answer to this question, I'd like to see it formatted like that:
lstat()
is identical tostat()
, except that if pathname is a symbolic link, then it returns information about the link itself, not the file that it refers to.
fstat()
is identical tostat()
, except that the file about which information is to be retrieved is specified by a file descriptor (instead of a file name).
http://man7.org/linux/man-pages/man2/stat.2.html
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