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awklib/eg/lib/groupawk.in
85 строк
2 KB
Arnold D. Robbins
Apply first set of edits to gawk.texi.
25 мар 2011, 14:31
25 мар 2011, 14:31
4fe569f
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# group.awk --- functions for dealing with the group file # # Arnold Robbins, arnold@skeeve.com, Public Domain # May 1993 # Revised October 2000 # Revised December 2010 BEGIN \ { # Change to suit your system _gr_awklib = "/usr/local/libexec/awk/" } function _gr_init( oldfs, oldrs, olddol0, grcat, using_fw, using_fpat, n, a, i) { if (_gr_inited) return oldfs = FS oldrs = RS olddol0 = $0 using_fw = (PROCINFO["FS"] == "FIELDWIDTHS") using_fpat = (PROCINFO["FS"] == "FPAT") FS = ":" RS = "\n" grcat = _gr_awklib "grcat" while ((grcat | getline) > 0) { if ($1 in _gr_byname) _gr_byname[$1] = _gr_byname[$1] "," $4 else _gr_byname[$1] = $0 if ($3 in _gr_bygid) _gr_bygid[$3] = _gr_bygid[$3] "," $4 else _gr_bygid[$3] = $0 n = split($4, a, "[ \t]*,[ \t]*") for (i = 1; i <= n; i++) if (a[i] in _gr_groupsbyuser) _gr_groupsbyuser[a[i]] = \ _gr_groupsbyuser[a[i]] " " $1 else _gr_groupsbyuser[a[i]] = $1 _gr_bycount[++_gr_count] = $0 } close(grcat) _gr_count = 0 _gr_inited++ FS = oldfs if (using_fw) FIELDWIDTHS = FIELDWIDTHS else if (using_fpat) FPAT = FPAT RS = oldrs $0 = olddol0 } function getgrnam(group) { _gr_init() return _gr_byname[group] } function getgrgid(gid) { _gr_init() return _gr_bygid[gid] } function getgruser(user) { _gr_init() return _gr_groupsbyuser[user] } function getgrent() { _gr_init() if (++_gr_count in _gr_bycount) return _gr_bycount[_gr_count] return "" } function endgrent() { _gr_count = 0 }