Redirect stdout file

Swarna Gowri Swarna Gowri 4 4 silver badges 7 7 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. File names? Streams to be redirected? This solution will preserve the order in which the output was generated. To actually store the stdout and stderr in that order you need a different approach. Isaac, the order will not necessarily be preserved as the stdout output will go through a pipe to a process that forwards it to each file while the stderr output will go directly to the file.

In any case, it doesn't look like the OP asked for the stderr output to come after the stdout one. Olivier Dulac Olivier Dulac 5, 1 1 gold badge 20 20 silver badges 33 33 bronze badges. This is really difficult to understand. RoVo : the first 2 commented lines shows the algorithm, simpler than the proof of concept example. RoVo I agree with your 1. Sure sure, it's not very likely, but anyways it might introduce a security issue later on. And then you might want to remove that string before printing to file ;- — pLumo.

Show 1 more comment. So, an initial idea to have one output on two files would be to use This solve both issues ImHere ImHere So the stdout of the pipeline is just the stdout of the cmd , and the stderr of the pipeline is the stdout and stderr of the cmd , intermixed. It's then a simple matter of sending those streams to the correct files. Talha is a contributor at Linux Hint with a vision to bring value and do useful things for the world.

He loves to read, write and speak about Linux, Data, Computers and Technology. The standard input stream stdin : 0 The standard output stream stdout : 1 The standard error stream stderr : 2 In this post, we will grasp the information that comes under redirecting stdout and stderr to file.

Standard output stdout : Each operating system based on Linux has a conviction of a default place for the executed command. Standard error stderr : Standard error or stderr is similar to standard input and output, but it is utilized for storing error messages.

Redirecting stdout and stderr to a file: As redirection is a method of capturing a program output and sending it as an input to another command or file. Redirecting stderr and stdout to separate files: Below is the command syntax for redirecting stdout and stderr to separate files. Talha Saif Malik Talha is a contributor at Linux Hint with a vision to bring value and do useful things for the world.

View all posts. You can do that by opening a file using the open system call and then duplicating that file descriptor to stdout. Something like I haven't tested this so beware of bugs in the code :. How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Redirect stdout to a file Ask Question. Asked 6 years, 10 months ago. Active 3 years, 3 months ago. Viewed 38k times. The code bellow redirects the output to a variable. Improve this question. Charles Duffy k 36 36 gold badges silver badges bronze badges. Why are you creating a pipe when there's no pipe shown in the shell syntax you're emulating? Only tag it bash if you want people who are experts in bash and not C!

Add a comment.