Shell script debugging-run log 1 This article mainly describes how to output debug logs in shell scripts. C/C ++ debug log In C/C ++, _ file __, _ FUNC __, _ line _ indicates which log of the current row comes fromSource codeWhich function of the row of the file. For example:
#< span style = "color: # 0000ff "> include stdio. h >
/* t. C */ int main ()
{< br> printf (" % s: % d: % s: Debug Hello world! \ N ", _ file __, _ line __, _ FUNC _);
return
0 ;
}< br> /* The running result is as follows:
$> make T
cc t. c-o t
$>. /t
T. c: 6: Main: Debug Hello world!
$> */ |
T. C: 6: Main: Debug Hello world! It is said that this line of information comes to the main function of the 6th line of the t. c file. This method allows you to quickly locate the problem during the debugging process. Debug logs in shell scripts Use the alias function to implement a debug log method similar to C/C ++. Save the file to/etc/mydebug
#! /Bin/bash
# Mydebug
# Aliases are not expanded when the shell is not interactive, unless
# + Expand_aliases shell option is set using shopt
Shopt - S expand_aliases Case
"$1" In
"Debug")
Alias mydebug='Echo-N $ (caller 0 | TR "": "): $ funcname: $ lineno: Log :""';
;;
*)
Alias mydebug='';
;;
Esac |
Test:
#! /Bin/bash
# mydebug_test.sh source / etc / mydebug debug; # If a parameter is included in debug mode, non-debug mode without any parameters. function check_apache ()
{< br> echo
" $ (mydebug) apache [OK] ";
} function check_mysql ()
{< br> echo
" $ (mydebug) mySQL [OK] ";
} function check_all ()
{< br> check_apache;
check_mysql;
} check_all; |
Debug mode running result: $>/Bin/bash mydebug_test.sh
18: check_all: mydebug_test.sh: check_apache: 8: Log: Apache [OK]
19: check_all: mydebug_test.sh: check_mysql: 13: Log: MySQL [OK]$> Running results in non-debug mode:$>/Bin/bash mydebug_test.sh
Apache [OK]
MySQL [OK]
------------- End -------------
From: GS
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