15 февр. 2017 г. · grep will return zero only when some string is matched. this rule is applicable for grep -c as well. – P. The exit status code for the 'grep' command - Stack Overflow grep return 0 if no match - Stack Overflow How to use return status value for grep? - Stack Overflow Другие результаты с сайта stackoverflow.com

22 июн. 2017 г. · You can use output=$(grep -c 'name' inputfile) The variable output will then contain the number 0, 1, or 2. Then you can use an if statement to execute ... Preventing grep from causing premature termination of "bash -e" script Can grep return true/false or are there alternative methods What exit code integer grep returns when it doesn't match a string? Make grep exit 1 if found, and exit 0 if not found Другие результаты с сайта unix.stackexchange.com

If the pattern is found, grep returns an exit status of 0, indicating success; if the pattern is not found, the exit status returned is 1; and if the file is ...

2.3 Exit Status ¶. Normally the exit status is 0 if a line is selected, 1 if no lines were selected, and 2 if an error occurred.

The variable contains the output but the return code corresponds to the return code of the last command (grep). Try to print $? and you'll see what happens.

13 нояб. 2015 г. · Normally the exit status is 0 if a line is selected, 1 if no lines were selected, and 2 if an error occurred.

24 авг. 2017 г. · You can make use of grep's return status. systemctl status asd.service | grep 'active' \ && status=active \ || status=not_active if [ "$status" == "active" ]; ...

17 мар. 2018 г. · I am testing, whether a new string is in the array - piping the array contents as lines to grep and checking exit code. But it somehow does not work.

1 авг. 2021 г. · The exit code will only tell you that command ran correctly. You could get the desired affect using some bash code. I'm sure this could be done ...

14 июн. 2012 г. · You are mixing 2 different things, grep's OUTPUT that will be every line that matches, and grep's RETURN CODE that will be 0 (zero) if at least one match was ...