2020年5月21日 · What is the exec() function and its family? Why is this function used and how does its work? Please anyone explain these functions.

2014年9月18日 · I have seen exec command used inside scripts to redirect all output to a file (as seen in this). But in simple words, what does it do?

The exec built-in command mirrors functions in the kernel, there are a family of them based on execve, which is usually called from C. exec replaces the current program in the current process, without fork …

2019年4月18日 · Possible duplicate of What are the different versions of exec used for in C and C++?, What is the difference between the functions of the exec family of system calls like exec and …

2018年1月4日 · At the exec line entrypoint.sh, the shell running as pid 1 will replace itself with the command server start. This is critical for signal handling. Without using exec, the server start in the …

2009年10月31日 · The use of fork and exec exemplifies the spirit of UNIX in that it provides a very simple way to start new tasks. Note the use of the word task here, I have deliberately avoided using …

The exec you have executed is a shell built-in : $ type -a exec exec is a shell builtin Now from help exec : Replace the shell with the given command. Execute COMMAND, replacing this shell with the …

2012年10月1日 · function example() { exec 1>&2 cat <<EOT Script requires at least one parameter. EOT exit 1 } As I understand, exec 1>&2 means that everything from this point one will be directed to …

2009年11月8日 · What is the difference between system and exec family commands? Especially I want to know which one of them creates child process to work?

2013年12月29日 · 4 Main Idea exec () family of functions replaces existing process image with a new process image. This is a marked difference from fork () system call where the parent and child …