Redirecting stdout from two programs
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1
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I'm running a memory check tool (prog1) on a C++ code (prog2), both of which give me a huge and detailed output. In order to chase down some bugs I need to save this output to a file.
I tried redirecting the stdout to a file:
prog1 prog2 > outfile.txt
But that gives me a file containing the output of prog2, while the output of prog1 is still going to the terminal.
Anyone know a way to specify that I want BOTH outputs to go to a file? Like (prog1 prog2) > outfile.txt?
command-line io-redirection stdout
asked 1 hour ago
FJC
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up vote
1
down vote
favorite
I'm running a memory check tool (prog1) on a C++ code (prog2), both of which give me a huge and detailed output. In order to chase down some bugs I need to save this output to a file.
I tried redirecting the stdout to a file:
prog1 prog2 > outfile.txt
But that gives me a file containing the output of prog2, while the output of prog1 is still going to the terminal.
Anyone know a way to specify that I want BOTH outputs to go to a file? Like (prog1 prog2) > outfile.txt?
command-line io-redirection stdout
asked 1 hour ago
FJC
1084
New contributor
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I'm running a memory check tool (prog1) on a C++ code (prog2), both of which give me a huge and detailed output. In order to chase down some bugs I need to save this output to a file.
I tried redirecting the stdout to a file:
prog1 prog2 > outfile.txt
But that gives me a file containing the output of prog2, while the output of prog1 is still going to the terminal.
Anyone know a way to specify that I want BOTH outputs to go to a file? Like (prog1 prog2) > outfile.txt?
command-line io-redirection stdout
asked 1 hour ago
FJC
1084
New contributor
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm running a memory check tool (prog1) on a C++ code (prog2), both of which give me a huge and detailed output. In order to chase down some bugs I need to save this output to a file.
I tried redirecting the stdout to a file:
prog1 prog2 > outfile.txt
But that gives me a file containing the output of prog2, while the output of prog1 is still going to the terminal.
Anyone know a way to specify that I want BOTH outputs to go to a file? Like (prog1 prog2) > outfile.txt?
command-line io-redirection stdout
command-line io-redirection stdout
asked 1 hour ago
FJC
1084
New contributor
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
FJC
1084
New contributor
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
FJC
1084
New contributor
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
FJC
1084
asked 1 hour ago
FJC
1084
1084
New contributor
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
FJC is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
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There’s a good chance that prog1 is writing its output to standard error. You can redirect both outputs to a single file with
prog1 prog2 2>&1 > outfile.txt
or you can split the outputs with
prog1 prog2 > outfile.txt 2> errors.txt
This doesn’t separate the individual programs’ output, it separates the output channels. See What are the shell's control and redirection operators? for details.
If you look at prog1’s documentation, you might find an option to tell it to store its output in a named file instead. For example, with strace,
strace -o strace.txt prog2 > outfile.txt
would store strace’s output in strace.txt, and everything written to standard output in outfile.txt.
answered 1 hour ago
Stephen Kitt
162k24358436
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
There’s a good chance that prog1 is writing its output to standard error. You can redirect both outputs to a single file with
prog1 prog2 2>&1 > outfile.txt
or you can split the outputs with
prog1 prog2 > outfile.txt 2> errors.txt
This doesn’t separate the individual programs’ output, it separates the output channels. See What are the shell's control and redirection operators? for details.
If you look at prog1’s documentation, you might find an option to tell it to store its output in a named file instead. For example, with strace,
strace -o strace.txt prog2 > outfile.txt
would store strace’s output in strace.txt, and everything written to standard output in outfile.txt.
answered 1 hour ago
Stephen Kitt
162k24358436
add a comment |
up vote
3
down vote
accepted
There’s a good chance that prog1 is writing its output to standard error. You can redirect both outputs to a single file with
prog1 prog2 2>&1 > outfile.txt
or you can split the outputs with
prog1 prog2 > outfile.txt 2> errors.txt
This doesn’t separate the individual programs’ output, it separates the output channels. See What are the shell's control and redirection operators? for details.
If you look at prog1’s documentation, you might find an option to tell it to store its output in a named file instead. For example, with strace,
strace -o strace.txt prog2 > outfile.txt
would store strace’s output in strace.txt, and everything written to standard output in outfile.txt.
answered 1 hour ago
Stephen Kitt
162k24358436
add a comment |
up vote
3
down vote
accepted
up vote
3
down vote
accepted
There’s a good chance that prog1 is writing its output to standard error. You can redirect both outputs to a single file with
prog1 prog2 2>&1 > outfile.txt
or you can split the outputs with
prog1 prog2 > outfile.txt 2> errors.txt
This doesn’t separate the individual programs’ output, it separates the output channels. See What are the shell's control and redirection operators? for details.
If you look at prog1’s documentation, you might find an option to tell it to store its output in a named file instead. For example, with strace,
strace -o strace.txt prog2 > outfile.txt
would store strace’s output in strace.txt, and everything written to standard output in outfile.txt.
answered 1 hour ago
Stephen Kitt
162k24358436
There’s a good chance that prog1 is writing its output to standard error. You can redirect both outputs to a single file with
prog1 prog2 2>&1 > outfile.txt
or you can split the outputs with
prog1 prog2 > outfile.txt 2> errors.txt
This doesn’t separate the individual programs’ output, it separates the output channels. See What are the shell's control and redirection operators? for details.
If you look at prog1’s documentation, you might find an option to tell it to store its output in a named file instead. For example, with strace,
strace -o strace.txt prog2 > outfile.txt
would store strace’s output in strace.txt, and everything written to standard output in outfile.txt.
answered 1 hour ago
Stephen Kitt
162k24358436
answered 1 hour ago
Stephen Kitt
162k24358436
answered 1 hour ago
Stephen Kitt
162k24358436
answered 1 hour ago
Stephen Kitt
162k24358436
162k24358436
add a comment |
add a comment |
FJC is a new contributor. Be nice, and check out our Code of Conduct.
FJC is a new contributor. Be nice, and check out our Code of Conduct.
FJC is a new contributor. Be nice, and check out our Code of Conduct.
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