使用shell讀取ini文件方法步驟

:begin
$!N
s/[#;]([^[:space:]]|[[:blank:]])*([^\\[:space:]]|[[:blank:]])(\n)/\3/
s/[#;]([^[:space:]]|[[:blank:]])*(\\)(\n)/\2\3/
$s/[#;]([^[:space:]]|[[:blank:]])*$//
/(\\\n|\n[[:blank:]]{4})/ {
  s/[[:blank:]]*(\\\n|\n[[:blank:]]{4})[[:blank:]]*/ /
  t begin
}
/^[[:blank:]]*\n/ D
/\n[[:blank:]]*$/ {
  s/\n[[:blank:]]*$//
  t begin
}
/^\[([^[:space:]]|[[:blank:]])*\]/! D
s/\[[[:blank:]]*//
s/[[:blank:]]*\]([^[:space:]]|[[:blank:]])*//
P
D

# -*- mode: conf-mode ; -*- \
#;
#; sample .ini file
#;
#;

[tako]
param_a=(1 # 2 3 \
4 5 ### 6 7 
    8 9 # 10
    )

a=b # kani \
# kani \


[kani]
param_a=1
param_b=2

[uni]
param_a=3
param_b=4

[wani]
param_a=5
param_b=6

[hebi]
param_a=9
param_b=10

output example:

% sed -nE -f list_section.sed sample.ini
tako
kani
uni
wani
hebi

:begin
$!N
# Erase comment strings
s/[#;]([^[:space:]]|[[:blank:]])*([^\\[:space:]]|[[:blank:]])(\n)/\3/
s/[#;]([^[:space:]]|[[:blank:]])*(\\)(\n)/\2\3/
$s/[#;]([^[:space:]]|[[:blank:]])*$//
# Concatenate continuation lines
/(\\\n|\n[[:blank:]]{4})/ {
  s/[[:blank:]]*(\\\n|\n[[:blank:]]{4})[[:blank:]]*/ /
  t begin
}
# Erase blank lines
/^[[:blank:]]*\n/ D
/\n[[:blank:]]*$/ {
  s/\n[[:blank:]]*$//
  t begin
}
# Check section headline and store section name to holdspace
/^([^[:space:]]|[[:blank:]])*\[([^[:space:]]|[[:blank:]])*\]/ {
h
x
s/^([^[:space:]]|[[:blank:]])*\[(([^[:space:]]|[[:blank:]])*)\].*$/\2/g
s/^[[:blank:]]*//g
s/[[:blank:]]$//g
x
D
}
# Skip line if current section is not interested one
x
/^wani$/! { 
  x
  D
}
x
# Print if it is proper parameter definition 
/^(([^[:space:]=]|[[:blank:]])*)=(([^[:space:]]|[[:blank:]])*)/ {
  s/^[[:blank:]]*/local /
  s/[[:blank:]]*=[[:blank:]]*/=/
  s/(([^[:space:]]|[[:blank:]])*)[[:blank:]]*(\n)/\1;\3/
  P
}
D

# Initialine the hold space: (Single empty line at the beginning)
1 { H ; x ; 
  # Change the expression for the defalut section name and/or variable prefix, here.
  s/^([^[:space:]]|[[:blank:]])*(\n)([^[:space:]]|[[:blank:]])*$/global\2global_/g
  x
}
:begin
$!N
# Erase comment strings
s/[#;]([^[:space:]]|[[:blank:]])*([^\\[:space:]]|[[:blank:]])(\n)/\3/
s/[#;]([^[:space:]]|[[:blank:]])*(\\)(\n)/\2\3/
$s/[#;]([^[:space:]]|[[:blank:]])*$//
# Concatenate continuation lines
/(\\\n|\n[[:blank:]]{4})/ {
  s/[[:blank:]]*(\\\n|\n[[:blank:]]{4})[[:blank:]]*/ / ; t begin
}
# Erase blank lines
/^[[:blank:]]*\n/ D
/\n[[:blank:]]*$/ {
  s/\n[[:blank:]]*$// ; t begin
}
# Check section headline and store section name to holdspace
/^([^[:space:]]|[[:blank:]])*\[([^[:space:]]|[[:blank:]])*\]/ {
  # Remove blackets and extra spaces at first line
  s/^([^[:space:]]|[[:blank:]])*\[(([^[:space:]]|[[:blank:]])*)\](([^[:space:]]|[[:blank:]])*)(\n)/\2\6/g
  s/^[[:blank:]]*//g; s/[[:blank:]]*(\n)/\1/g
  # Store the section name to the hold space, and format stored one for shell variable for the hold space
  h
  x
  s/(\n)([^[:space:]]|[[:blank:]])*$//
  s/([^[:alnum:]_]|$)/_/g
  x
  # Append the section name to the hold space.
  H
  # Remove unused line of the hold space and rearrange the remaining lines.
  x
  s/(([^[:space:]]|[[:blank:]])*)(\n)(([^[:space:]]|[[:blank:]])*)(\n)(([^[:space:]]|[[:blank:]])*)$/\4\3\1/
  x
  D
}
# Skip line if current section is not interested one
x
/^(wani|uni)(\n)/! { x ; D ; }
x
# Print if it is proper parameter definition 
/^(([^[:space:]=]|[[:blank:]])*)=(([^[:space:]]|[[:blank:]])*)/ {
  # Store current patern space text at the end of the hold space
  H

  # Build shell script variable name and store it at the end of the hold space
  s/(([^[:space:]=]|[[:blank:]])*)=.*$/\1/g
  s/^[[:blank:]]*//
  s/[[:blank:]]*$//
  s/[^[:alnum:]_]/_/g
  # If further rename of the variable name is necessary, put here.

  # Store variable name at the end of the hold space
  H

  # Build parameter variable value and keep it at pattern space
  # At first, Resore the current line text from hold space
  g
  # Remove unused lines.
  s/^(([^[:space:]]|[[:blank:]])*\n){2}//
  s/(\n([^[:space:]]|[[:blank:]])*){2}$//
  # Remove the text other than the parameter value
  s/^([^[:space:]=]|[[:blank:]])*=//g
  # If further formatting of the value is necessary, put here.

  # Append hold space stored date into pattern space
  G
  # Remove unused lines from the pattern space
  s/^(([^[:space:]]|[[:blank:]])*\n)(([^[:space:]]|[[:blank:]])*\n)(([^[:space:]]|[[:blank:]])*\n)(([^[:space:]]|[[:blank:]])*\n)(([^[:space:]]|[[:blank:]])*\n)/\1\5\9/
  # Rearrance the order of line in the pattern space, it is nessacery because only \1 ...\9 is avaiable
  s/^(([^[:space:]]|[[:blank:]])*\n)(([^[:space:]]|[[:blank:]])*\n)(([^[:space:]]|[[:blank:]])*)(\n)(([^[:space:]]|[[:blank:]])*)$/\1\3\8\7\5/

  # Format the output in the first line of the pattern space, and 
  # Restore the next line at the second line of the pattern space
  s/^(([^[:space:]]|[[:blank:]])*)(\n)(([^[:space:]]|[[:blank:]])*)(\n)(([^[:space:]]|[[:blank:]])*)(\n([^[:space:]]|[[:blank:]])*)$/local \4\7=\1;\9/

  # Clean up hold space
  x
  s/(\n([^[:space:]]|[[:blank:]])*){3}$//
  x
  P
}
D

[Usage] % parse_ini.sh -list     file [files ...]
        % parse_ini.sh [options] file [files ...]

[Options]
    -l,--list                       : List sections 
    -S,--sec-select       name      : Section name to select
    -T,--sec-select-regex expr      : Section reg. expr. to select
    -V,--variable-select name       : variable name to select
    -W,--variable-select-regex expr : variable reg. expr. to select
    -L,--local                      : Definition as local variables (B-sh)
    -e,--env                        : Definition as enviromnental variables
    -q,--quot                       : Definition by quoting with double/single-quotation.
    -c,--csh,--tcsh                 : Output for csh statement (default: B-sh)
    -b,--bsh,--bash                 : Output for csh statement (default)
    -s,--sec-prefix                 : add prefix: 'sectionname_' to variable names. 
    -v,--verbose                    : Verbose messages 
    -h,--help                       : Show Help (this message)