isatty ? Valery --- Maxim Veksler <[EMAIL PROTECTED]> wrote:
> Hello everyone, > > My quest for the answer to "Can I determine if my > stdout redirected" > lead me to /proc. Is there some good documentation > of this FS? I'm > wondering about use cases for the various > information exported. > > > > For the answer, in case people wonder, here it is: > > """ > [EMAIL PROTECTED]:/tmp/testbash$ cat fd_report.sh > #!/bin/bash > > declare STDOUT="$(readlink /proc/$$/fd/1)" > > # Redirect stdout to stderr for the whole run. > # (redirecting is fine but we still need to report > status to user). > exec >&2 > > if [ -f "$STDOUT" ]; then > echo "My stdout is redirected to: $STDOUT" > else > echo "Running normal, stdout is at: $STDOUT" > fi > > file "$STDOUT" > """ > > Example run: > """ > [EMAIL PROTECTED]:/tmp/testbash$ ./fd_report.sh > Running normal, stdout is at: /dev/pts/3 > /dev/pts/3: character special (136/3) > > [EMAIL PROTECTED]:/tmp/testbash$ ./fd_report.sh > >/tmp/file > My stdout is redirected to: /tmp/file > /tmp/file: empty > """ > > Please note that this will not work for when stdout > is redirected to > other device then a "file" (char device, fifo and > co.) > > """ > [EMAIL PROTECTED]:/tmp/testbash$ ./fd_report.sh > >/dev/null > Running normal, stdout is at: /dev/null > /dev/null: character special (1/3) > """ > > > I would like to react differently if my output is > redirected to stdout > or to a file; > > I can think of several ways that might give leads to > someone but none > that actually seems "elegent", to but none > > > Reading stdout redirection target from bash scripts > ? > -- > Cheers, > Maxim Veksler > > "Free as in Freedom" - Do u GNU ? > > ================================================================= > To unsubscribe, send mail to > [EMAIL PROTECTED] with > the word "unsubscribe" in the message body, e.g., > run the command > echo unsubscribe | mail > [EMAIL PROTECTED] > > ____________________________________________________________________________________ Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
