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="$1"
  26 TEMPFILE="$(posix_mktemp)"
  27
  28 if [ ! -f "$INFILE" ]; then
  29     echo "Error: input file $INFILE doesn't exist."
  30     exit $EXIT_INPUT_FILE_DOESNT_EXIST
  31 fi
  32
  33 # Grabs all of the "#define MACRO..." lines, except for MACRO_X_COUNT
  34 # and MACRO_ENV_VAR_PREFIX which aren't real macros, and outputs the
  35 # macro name (everything after "MACRO_") enclosed in quotes and dollar
  36 # signs, appropriate to be copy/pasted directly into nagios-mode.el.
  37 MACRO_REGEX='#define[[:space:]]\{1,\}MACRO_\([^[:space:]]\{1,\}\)[[:space:]]\{1,\}.*'
  38 sed -n "s/${MACRO_REGEX}/\"\$\1\$\"/p" "${INFILE}" \
  39       | sed '/X_COUNT\|ENV_VAR_PREFIX/d'           \
  40       >> "${TEMPFILE}"
  41
  42 # Add "$ARG1$", "$ARG2$",... "$ARG<max>$" to the list, where <max> is
  43 # defined in macros.h.
  44 MAXARG_REGEX='#define[[:space:]]\{1,\}MAX_COMMAND_ARGUMENTS[[:space:]]\{1,\}\([1-9][0-9]*\).*'
  45 MAXARG=$(sed -n "s/${MAXARG_REGEX}/\1/p" "${INFILE}")
  46
  47 for argnum in `seq 1 $MAXARG`; do
  48     echo "\"\$ARG${argnum}\$\"" >> "${TEMPFILE}"
  49 done
  50
  51 # Also the "$USER<N>$" macros, similar to the above.
  52 MAXUSER_REGEX='#define[[:space:]]\{1,\}MAX_USER_MACROS[[:space:]]\{1,\}\([1-9][0-9]*\).*'
  53 MAXUSER=$(sed -n "s/${MAXUSER_REGEX}/\1/p" "${INFILE}")
  54
  55 for argnum in `seq 1 $MAXUSER`; do
  56     echo "\"\$USER${argnum}\$\"" >> "${TEMPFILE}"
  57 done
  58
  59 # Finally, sort the list and print it.
  60 sort < "${TEMPFILE}"
  61
  62 # ... and clean up
  63 rm "${TEMPFILE}"