utils/parse_macros

   1 #!/bin/sh
   2 #
   3 # Parse the macro names out of Nagios' include/macros.h.
   4 #
   5 # Operates on whatever file you give it. That should probably be
   6 # include/macros.h. Just sayin'.
   7 #
   8
   9 EXIT_USAGE=1
  10 EXIT_INPUT_FILE_DOESNT_EXIST=2
  11
  12 posix_mktemp(){
  13   # Securely create a temporary file under ${TMPDIR} using the
  14   # template "tmpXXXXXX", and echo the result to stdout. This works
  15   # around the absence of "mktemp" in the POSIX standard.
  16   printf 'mkstemp(template)' | m4 -D template="${TMPDIR:-/tmp}/tmpXXXXXX"
  17 }
  18
  19 if [ $# -lt 1 ]; then
  20     echo "Usage: $0 <input_file>"
  21     exit $EXIT_USAGE
  22 fi
  23
  24
  25 INFILE="$1"
  26 OUTFILE="$2"
  27 TEMPFILE="$(posix_mktemp)"
  28
  29 if [ ! -f "$INFILE" ]; then
  30     echo "Error: input file $INFILE doesn't exist."
  31     exit $EXIT_INPUT_FILE_DOESNT_EXIST
  32 fi
  33
  34 # Grabs all of the "#define MACRO..." lines, except for MACRO_X_COUNT
  35 # and MACRO_ENV_VAR_PREFIX which aren't real macros, and outputs the
  36 # macro name (everything after "MACRO_") enclosed in quotes and dollar
  37 # signs, appropriate to be copy/pasted directly into nagios-mode.el.
  38 MACRO_REGEX='#define[[:space:]]\{1,\}MACRO_\([^[:space:]]\{1,\}\)[[:space:]]\{1,\}.*'
  39 sed -n "s/${MACRO_REGEX}/\"\$\1\$\"/p" "${INFILE}" \
  40       | sed '/X_COUNT\|ENV_VAR_PREFIX/d'           \
  41       >> "${TEMPFILE}"
  42
  43 # Add "$ARG1$", "$ARG2$",... "$ARG<max>$" to the list, where <max> is
  44 # defined in macros.h.
  45 MAXARG_REGEX='#define[[:space:]]\{1,\}MAX_COMMAND_ARGUMENTS[[:space:]]\{1,\}\([1-9][0-9]*\).*'
  46 MAXARG=$(sed -n "s/${MAXARG_REGEX}/\1/p" "${INFILE}")
  47
  48 for argnum in `seq 1 $MAXARG`; do
  49     echo "\"\$ARG${argnum}\$\"" >> "${TEMPFILE}"
  50 done
  51
  52 # Also the "$USER<N>$" macros, similar to the above.
  53 MAXUSER_REGEX='#define[[:space:]]\{1,\}MAX_USER_MACROS[[:space:]]\{1,\}\([1-9][0-9]*\).*'
  54 MAXUSER=$(sed -n "s/${MAXUSER_REGEX}/\1/p" "${INFILE}")
  55
  56 for argnum in `seq 1 $MAXUSER`; do
  57     echo "\"\$USER${argnum}\$\"" >> "${TEMPFILE}"
  58 done
  59
  60 # Finally, sort the list and print it.
  61 sort < "${TEMPFILE}"
  62
  63 # ... and clean up
  64 rm "${TEMPFILE}"