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author | Indrajith K L | 2022-12-03 17:00:20 +0530 |
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committer | Indrajith K L | 2022-12-03 17:00:20 +0530 |
commit | f5c4671bfbad96bf346bd7e9a21fc4317b4959df (patch) | |
tree | 2764fc62da58f2ba8da7ed341643fc359873142f /coreutils-5.3.0-bin/share/awk/getopt.awk | |
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Diffstat (limited to 'coreutils-5.3.0-bin/share/awk/getopt.awk')
-rw-r--r-- | coreutils-5.3.0-bin/share/awk/getopt.awk | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/coreutils-5.3.0-bin/share/awk/getopt.awk b/coreutils-5.3.0-bin/share/awk/getopt.awk new file mode 100644 index 0000000..0e3421a --- /dev/null +++ b/coreutils-5.3.0-bin/share/awk/getopt.awk @@ -0,0 +1,80 @@ +# getopt.awk --- do C library getopt(3) function in awk +# +# Arnold Robbins, arnold@skeeve.com, Public Domain +# +# Initial version: March, 1991 +# Revised: May, 1993 + +# External variables: +# Optind -- index in ARGV of first nonoption argument +# Optarg -- string value of argument to current option +# Opterr -- if nonzero, print our own diagnostic +# Optopt -- current option letter + +# Returns: +# -1 at end of options +# ? for unrecognized option +# <c> a character representing the current option + +# Private Data: +# _opti -- index in multi-flag option, e.g., -abc +function getopt(argc, argv, options, thisopt, i) +{ + if (length(options) == 0) # no options given + return -1 + + if (argv[Optind] == "--") { # all done + Optind++ + _opti = 0 + return -1 + } else if (argv[Optind] !~ /^-[^: \t\n\f\r\v\b]/) { + _opti = 0 + return -1 + } + if (_opti == 0) + _opti = 2 + thisopt = substr(argv[Optind], _opti, 1) + Optopt = thisopt + i = index(options, thisopt) + if (i == 0) { + if (Opterr) + printf("%c -- invalid option\n", + thisopt) > "/dev/stderr" + if (_opti >= length(argv[Optind])) { + Optind++ + _opti = 0 + } else + _opti++ + return "?" + } + if (substr(options, i + 1, 1) == ":") { + # get option argument + if (length(substr(argv[Optind], _opti + 1)) > 0) + Optarg = substr(argv[Optind], _opti + 1) + else + Optarg = argv[++Optind] + _opti = 0 + } else + Optarg = "" + if (_opti == 0 || _opti >= length(argv[Optind])) { + Optind++ + _opti = 0 + } else + _opti++ + return thisopt +} +BEGIN { + Opterr = 1 # default is to diagnose + Optind = 1 # skip ARGV[0] + + # test program + if (_getopt_test) { + while ((_go_c = getopt(ARGC, ARGV, "ab:cd")) != -1) + printf("c = <%c>, optarg = <%s>\n", + _go_c, Optarg) + printf("non-option arguments:\n") + for (; Optind < ARGC; Optind++) + printf("\tARGV[%d] = <%s>\n", + Optind, ARGV[Optind]) + } +} |