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O_CLOEXEC (Since Linux 2.6. 23) Enable the close-on-exec flag for the new file descriptor. Specifying this flag permits a program to avoid additional fcntl(2) F_SETFD operations to set the FD_CLOEXEC flag.
On Linux, the set of file descriptors open in a process can be accessed under the path /proc/PID/fd/ , where PID is the process identifier. File descriptor /proc/PID/fd/0 is stdin , /proc/PID/fd/1 is stdout , and /proc/PID/fd/2 is stderr .
The term open file description is the one used by POSIX to refer to the entries in the system-wide table of open files. In other contexts, this object is variously also called an "open file object", a "file handle", an "open file table entry", or—in kernel-developer parlance—a struct file.
My process forks several times, and each time the child will exec - means I want it to run some other program.
In the main process I open a file descriptor with the open() syscall.
Would it be correct to give it a flag O_CLOEXEC so the new program that I run with exec() wouldn't has the fd resource?
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