awk$B$NH/E8(J

$B$3$N%^%K%e%"%k$G$O!"(JPOSIX$B5,3J$K=>$C$?(JGNU$B$N(Jawk$B=hM}7O$K$D$$$F(J $B$N@bL@$r$7$F$$$k!#B?$/$N(Jawk$B%f!<%6!<$O!"(JVersion 7 UNIX$B>e$G$N%*%j%8(J $B%J%k(Jawk$B$@$1$rCN$C$F$$$k(J($B$3$N=hM}7O$O(J 4.3 --Reno$B$^$G$N(JBerkeley UNIX $B>e$N(Jawk$B$N85$H$J$C$?!#(JBerkeley UNIX $B$N(J $B%j%j!<%9(J4.4 $B$G$O!"%7%9%F%`(J $B$N(Jawk$B$K(Jgawk 2.15.2$B$r;HMQ$7$F$$$k(J)$B!#$3$N>O$G$O(Jawk$B8@(J $B8l$N?J2=$r!"(J($B$h$j>\$7$$@bL@$N$"$k>l=j$N(J)$B%/%m%9%j%U%!%l%s%9$r8r$($F

Major Changes between V7 and SVR3.1

awk$B8@8l$O(JVersion 7 Unix (1978)$B$H!"(JSystem V Release 3.1 (1987)$B$G:G=i$K(J $B:n$i$l$??7$7$$%P!<%8%g%s$H$N4V$GAjEv$K?J2=$7$?!#$3$N%;%/%7%g%s$G$OJQ99$H!"(J $B$=$l$K$D$$$F$N%/%m%9%j%U%!%l%s%9$rMWLs$9$k!#(J

• $B0l9T$K$"$kJ#?t$N%k!<%k$N6h@Z$j$K(J`;'$B$rMW5a$9$k$h$&$K$J$C$?!#(J ($B%;%/%7%g%s(J awk $B$NJ8$H9T(J$B$r;2>H(J).
• $B%f!<%6!$B%f!<%6!$B$r;2>H(J).
• delete $BJ8(J ($B%;%/%7%g%s(J The delete Statement$B$r;2>H(J).
• do-while $BJ8(J ($B%;%/%7%g%s(J The do-while Statement$B$r;2>H(J).
• $BAH$_9~$_4X?t$N(Jatan2, cos, sin, rand, srand ($B%;%/%7%g%s(J Numeric Built-in Functions$B$r;2>H(J).
• $BAH$_9~$_4X?t$N(Jgsub, sub, match ($B%;%/%7%g%s(J Built-in Functions for String Manipulation$B$r;2>H(J)$B!#(J
• $BAH9~$_4X?t$N(J close$B$H(Jsystem ($B%;%/%7%g%s(J Built-in Functions for Input/Output$B$r;2>H(J)$B!#(J
• $BAH9~$_JQ?t$N(JARGC, ARGV, FNR, RLENGTH, RSTART,SUBSEP($B%;%/%7%g%s(J $BAH$_9~$_JQ?t(J$B$r;2>H(J)$B!#(J
• `?'$B1i;;;R$H(J`:'$B1i;;;R$r;H$C$?>r7o<0(J ($B%;%/%7%g%s(J Conditional Expressions$B$r;2>H(J).
• $B$Y$->h$N1i;;;R(J`^'$B$H(J ($B%;%/%7%g%s(J Arithmetic Operators$B$r;2>H(J) $B$=$NBeF~1i;;;R(J `^=' ($B%;%/%7%g%s(J $BBeF~<0(J$B$r;2>H(J)$B!#(J
• $B0lIt$N8E$$(Jawk$B%W%m%0%i%`$GGK$i$l$F$$$?1i;;;R$NM%@h=g0L$r(J C$B$HF1$8$K$7$?(J($B%;%/%7%g%s(J Operator Precedence (How Operators Nest)$B$r;2>H(J)$B!#(J
• FS$B$K%;%C%H$9$kCM(J ($B%;%/%7%g%s(J $B%U%#!<%k%I$NJ,3dJ}K!$N;XDj(J$B$r;2>H(J)$B$H(J split$B4X?t$N;0HVL\$N0z?t$H$7$F@55,I=8=$r5v$9(J ($B%;%/%7%g%s(J Built-in Functions for String Manipulation$B$r;2>H(J)$B!#(J
• `~'$B1i;;;R$H(J`!~'$B1i;;;R$KBP$9$k%*%Z%i%s%I$H$7$F$NF0E*@55,I=8=(J ($B%;%/%7%g%s(J $B@55,I=8=$N;H$$J}(J$B$r;2>H(J).
• `\b'$B!"(J`\f'$B!"(J`\r'$B$N$h$&$J%(%9%1!<%W%7!<%1%s%9(J ($B%;%/%7%g%s(J $B%(%9%1!<%W%7!<%1%s%9(J$B$r;2>H(J) ($B0lIt$N%Y%s%@!<$O8E$$%P!<%8%g%s$N(Jawk$B$r(J `\b'$B!"(J`\f'$B!"(J`\r'$B$rG'<1$9$k$h$&$K(J $BJQ99$7$F$$$?$,!"$=$l$O$"$J$?$,?.Mj$G$-$k$b$N$G$O$J$$(J)$B!#(J
• getline$B4X?t$KBP$9$kF~NO$N%j%@%$%l%/%H(J ($B%;%/%7%g%s(J getline$B$r;H$C$?F~NO(J$B$r;2>H(J).
• $BJ#?t$N(JBEGIN$B%k!<%k$H(JEND$B%k!<%k(J ($B%;%/%7%g%s(J $BFCBEGIN$B$H(JEND$B$r;2>H(J).
• $BB?Multi-dimensional Arrays$B$r;2>H(J)$B!#(J

Changes between SVR3.1 and SVR4

UNIX System V Release 4 version$B$N(Jawk$B$G$Ogawk$B$,%*%j%8%J%k$G$"$k(J)

• ENVIRON $BJQ?t(J ($B%;%/%7%g%s(J $BAH$_9~$_JQ?t(J$B$r;2>H(J)$B!#(J
• $B%3%^%s%I%i%$%s$G$N(J`-f' $B%*%W%7%g%s$NJ#?t;XDj(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J).
• $B%W%m%0%i%``-v'$B%*%W%7%g%s(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J).
• $B%3%^%s%I%i%$%s%*%W%7%g%s$N=*N;$r$"$i$o$9$?$a$N(J`--'$B%*%W%7%g%s!#(J
• `\a', `\v', `\x' $B$H$$$&%(%9%1!<%W%7!<%1%s%9(J ($B%;%/%7%g%s(J $B%(%9%1!<%W%7!<%1%s%9(J$B$r;2>H(J)$B!#(J
• $BAH$_9~$_4X?t(Jsrand$B$,JV$9CM$NDj5A(J ($B%;%/%7%g%s(J Numeric Built-in Functions$B$r;2>H(J)$B!#(J
• $BBg>.J8;zJQ49$N$?$a$NAH$_9~$_$NJ8;zNsA`:n4X?t(Jtoupper $B$H(J tolower ($B%;%/%7%g%s(J Built-in Functions for String Manipulation$B$r;2>H(J).
• printf$B4X?t$N=q<0;XDjJ8;z(J`%c'$B$N;EMM$NL@3N2=(J ($B%;%/%7%g%s(J $B=q<0@)8fJ8;z(J$B$r;2>H(J)$B!#(J
• printf$B4X?t$N0z?t%j%9%HCf$G(J("%*.*d")$B$NMM$K%U%#!<%k%II}$d!"@:EY(J $B$rF0E*$KM?$($k5!G=(J ($B%;%/%7%g%s(J $B=q<0@)8fJ8;z(J$B$r;2>H(J).
• $0 ~/foo/$B$NMM$K!"%^%C%A%s%0%*%Z%l!<%?$r;HMQ$7$?$H$-$HEy2A$J(J /foo/$B$NMM$J@55,I=8=Dj?t(J ($B%;%/%7%g%s(J $B@55,I=8=Dj?t$r;H$&(J$B$r;2>H(J)$B!#(J

Changes between SVR4 and POSIX awk

POSIX $B$N%3%^%s%I8@8l$*$h$S%f!<%F%#%j%F%#$NI8=`$O!"(Jawk$B$K

• $B=hM}7O8GM-$N%*%W%7%g%s$N$?$a$N(J`-W'$B$N;HMQ!#(J
• $B?tCM$+$iJ8;zNs$NJQ99$r@)8f$9$k(JCONVFMT$B$N;HMQ(J ($B%;%/%7%g%s(J Conversion of Strings and Numbers$B$r;2>H(J)$B!#(J
• $B?tCMJ8;zNs$N35G0$H!"$=$l$,4|BTDL$j$KF0:n$9$k$?$a$N$-$A$s$H$7$?Hf3S%k!<%k(J ($B%;%/%7%g%s(J Variable Typing and Comparison Expressions$B$r;2>H(J)$B!#(J
• $B0JA0$K$O%I%-%e%a%s%H2=$5$l$F$$$J$+$C$?8@8l$N;EMM$NB?$/$r(J $B$h$j40A4$K%I%-%e%a%s%H2=$7$?!#(J

$B0J2<$N0lHLE*$J3HD%$O(JPOSIX$BI8=`$G$O5v$5$l$F$$$J$$!#(J

• \x$B$G;XDj$5$l$k%(%9%1!<%W%7!<%1%s%9$rG'<1$7$J$$!#(J ($B%;%/%7%g%s(J $B%(%9%1!<%W%7!<%1%s%9(J$B$r;2>H(J).
• Newlines do not act as whitespace to separate fields when FS is equal to a single space.
• $B%-!<%o!<%I(Jfunction$B$NN,8l$H$7$F(J func$B$rG'$a$J$$(J ($B%;%/%7%g%s(J Function Definition Syntax$B$r;2>H(J)$B!#(J
• `^' $B$d(J `^='$B$NBe$o$j$K(J`**' $B$^$?$O(J `**='$B$r(J $B;H$&$3$H$,$G$-$J$$(J ($B%;%/%7%g%s(J Arithmetic Operators$B$r;2>H$H(J $B%;%/%7%g%s(J $BBeF~<0(J$B$r;2>H(J)$B!#(J
• $B%3%^%s%I%i%$%s$G(J`-Ft'$B$H;XDj$5$l$?$H$-$K(JFS$B$N(J $BCM$r%?%V$K%;%C%H$7$J$$(J ($B%;%/%7%g%s(J $B%U%#!<%k%I$NJ,3dJ}K!$N;XDj(J$B$r;2>H(J)$B!#(J
• $BAH9~$_4X?t$N(Jfflush$B$r%5%]!<%H$7$J$$(J ($B%;%/%7%g%s(J Built-in Functions for Input/Output$B$r;2>H(J)$B!#(J

Extensions in the Bell Laboratories awk

$B%*%j%8%J%k$N(Jawk$B$N3+H/(Jftp$B$rDL$8$FF~uBV$KCV$$$F$$$k(J ($B%;%/%7%g%s(J $B<+M3$KF~$N(Jawk$B=hM}7O(J$B$r;2>H(J)$B!#(J $B$3$N%;%/%7%g%s$G$O!"H`$N:n@.$7$?(Jawk$B=hM}7O$N(JPOSIX awk$B$K$O$J$$(J $B3HD%5!G=$r@bL@$9$k!#(J

• $B$=$l$>$l%U%#!<%k%I?t$N:GBgCM$d%l%3!<%I%5%$%:$N:GBgCM$r@_Dj$9$k(J `-mf NNN' $B%*%W%7%g%s$H(J `-mr NNN'$B%*%W%7%g%s(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J)$B!#(J
• $B%P%C%U%!%j%s%0$5$l$?=PNO$r%U%i%C%7%e$9$k$?$a$NAH9~$_4X?t(J fflush ($B%;%/%7%g%s(J Built-in Functions for Input/Output$B$r;2>H(J)$B!#(J

POSIX awk$B$K$O$J$$(Jgawk$B$N3HD%(J

GNU $B$Ngawk$B$K$O!"B?$/$N5!G=$,DI2C$5$l$F$$$k!#(J $B$3$N%;%/%7%g%s$G$O!"$=$N$h$&$J5!G=$r$H$j$"$2$k!#(J $B3HD%5!G=$O(J`--traditional' $B%*%W%7%g%s$d(J `--posix'$B%*%W%7%g%s$K$h$C$F6X;_$9$k$3$H$,$G$-$k(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J)$B!#(J

gawk$B$N%P!<%8%g%s(J 2.10$B$G$O0J2<$N5!G=$,F3F~$5$l$?!#(J

• `-f'$B%3%^%s%I%i%$%s%*%W%7%g%s$G;XDj$5$l$?%U%!%$%k$r8!:w$9$k(J $B>l=j$r;XDj$9$k(JAWKPATH$B4D6-JQ?t!#(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J).
• IGNORECSE$BJQ?t$H$=$N8z2L!#(J ($B%;%/%7%g%s(J $BBg>.J8;z$r6hJL$9$k%^%C%A%s%0(J$B$r;2>H(J).
• `/dev/fd/n' $B$H$$$C$?%U%!%$%kL>$N2rSpecial File Names in gawk$B$r;2>H(J)$B!#(J

gawk$B%P!<%8%g%s(J2.13$B$G$O0J2<$N5!G=$,F3F~$5$l$?!#(J

• FIELDWIDTHS$BJQ?t$H$=$N8z2L(J ($B%;%/%7%g%s(J $B8GDjD9%G!<%?$NFI$_9~$_(J$B$r;2>H(J)$B!&(J
• $B%?%$%`%9%?%s%W$r07$C$?$j=PNO$7$?$j$9$k$?$a$NAH9~$_4X?t(J systime $B$H(J strftime ($B%;%/%7%g%s(J Functions for Dealing with Time Stamps$B$r;2>H(J)$B!#(J
• $B%=!<%9%3!<%I>e$N%(%i!<$d!"0\?";~$KLdBj$K$J$k$h$&$J8D=j$r(J $B;XE&$9$k(J`-W lint' $B%*%W%7%g%s(J($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J)$B!#(J
• $B$3$l$i$N3HD%$rL58z$K$9$k(J`-W compat'$B%*%W%7%g%s(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J)$B!#(J
• POSIX$B$K40A4$K=>$&$h$&$K$9$k(J`-W posix'$B%*%W%7%g%s(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J).

gawk$B%P!<%8%g%s(J2.14$B$G$O0J2<$N5!G=$,F3F~$5$l$?!#(J

• $Bnext file$BJ8(J ($B%;%/%7%g%s(J The nextfile Statement$B$r;2>H(J)$B!#(J

gawk$B%P!<%8%g%s(J2.15$B$G$O0J2<$N5!G=$,F3F~$5$l$?!#(J

• FILENAME$B$,(JARGV$B$N$I$3$K$"$k$+$r<($9(J ARGIND$B$H$$$&JQ?t(J ($B%;%/%7%g%s(J $BAH$_9~$_JQ?t(J$B$r;2>H(J)$B!#(J
• getline $B$,(J -1$B$rJV$7$?$j!"(Jclose $B$,<:GT$7$?$H$-$N(J $B%7%9%F%`$N%(%i!<%a%C%;!<%8$rJ];}$9$k(JERRNO$B$H$$$&JQ?t(J ($B%;%/%7%g%s(J $BAH$_9~$_JQ?t(J$B$r;2>H(J)$B!#(J
• `--'$B$G;O$^$k(JGNU$B%9%?%$%k$ND9$$%*%W%7%g%s$r07$&5!G=!#(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J).
• $B%3%^%s%I%i%$%s>e$N%W%m%0%i%`$H%i%$%V%i%j%U%!%$%k$H$r:.:_$9$k(J $B$?$a$N(J`--source'$B%*%W%7%g%s(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J).
• The `/dev/pid', `/dev/ppid', `/dev/pgrpid', `/dev/user' $B$H$$$C$?%U%!%$%kL>$N2rSpecial File Names in gawk$B$r;2>H(J).

gawk$B$N%P!<%8%g%s(J3.0$B$G$O0J2<$N5!G=$,F3F~$5$l$?!#(J

• next file$BJ8$O(Jnextfile$B$KJQ99$5$l$?(J ($B%;%/%7%g%s(J The nextfile Statement$B$r;2>H(J)$B!#(J
• The `--lint-old' option to UNIX $B%P!<%8%g%s(J7$B>e$N%*%j%8%J%k(Jawk$B$K$J$$5!G=$r(J $B7Y9p$9$k$?$a$N(J`--lint-old'$B%*%W%7%g%s(J ($B%;%/%7%g%s(J Major Changes between V7 and SVR3.1$B$r;2>H(J)$B!#(J
• `--compat'$B%*%W%7%g%s$N$h$jE,@Z$JL>A0$H$7$F(J `--traditional' $B%*%W%7%g%s$,DI2C$5$l$?(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H(J)$B!#(J
• FS$B$K6uJ8;zNs$,%;%C%H$5$l$?$H$-$NF0:n$H!"(J split$B$NBh;00z?t$K6uJ8;zNs$rEO$7$?$H$-$NF0:n!#(J ($B%;%/%7%g%s(J $B8D!9$N%-%c%i%/%?$rJL8D$N%U%#!<%k%I$K$9$k(J$B$r;2>H(J).
• RS$B$,@55,I=8=$N$H$-$NF0:n!#(J ($B%;%/%7%g%s(J $BF~NO$r%l%3!<%I$X$HJ,3d$r$9$k$d$j$+$?(J$B$r;2>H(J).
• RT$BJQ?t(J ($B%;%/%7%g%s(J $BF~NO$r%l%3!<%I$X$HJ,3d$r$9$k$d$j$+$?(J$B$r;2>H(J).
• $B$h$j6/NO$J%F%-%9%HA`:n$N$?$a$N(Jgensub$B4X?t(J ($B%;%/%7%g%s(J Built-in Functions for String Manipulation$B$r;2>H(J)$B!#(J
• strftime$B4X?t$,0z?t$J$7$G8F$Y$k$h$&$K%G%U%)%k%H$N(J $B;~4V%U%)!<%^%C%H$r3MF@$7$?(J ($B%;%/%7%g%s(J Functions for Dealing with Time Stamps$B$r;2>H(J)$B!#(J
• POSIX$B$N@55,I=8=$H(JGNU$B@55,I=8=$NN>J}$r%U%k%5%]!<%H$7$?(J ($B%;%/%7%g%s(J $B@55,I=8=(J$B$r;2>H(J)$B!#(J
• `--re-interval' $B%*%W%7%g%s$K$h$C$F(J $B@55,I=8=$G(Jinterval expression$B$,;H$($k$h$&$K$J$k(J ($B%;%/%7%g%s(J $B@55,I=8=1i;;;R(J$B$r;2>H(J)$B!#(J
• IGNORECASE$B$NCM$,!"J8;zNsHf3S$@$1$G$J$/!"@55,I=8=1i;;$K$b(J $BE,MQ$5$l$k$h$&$K$J$C$?(J ($B%;%/%7%g%s(J $BBg>.J8;z$r6hJL$9$k%^%C%A%s%0(J$B$r;2>H(J).
• BELL$B8&%P!<%8%g%s$N(Jawk$B$K$"$C$?(J `-m'$B%*%W%7%g%s$H(Jfflush$B4X?t(J ($B%;%/%7%g%s(J $B%3%^%s%I%i%$%s%*%W%7%g%s(J$B$r;2>H$H(J $B%;%/%7%g%s(J Built-in Functions for Input/Output$B$r;2>H(J)$B!#(J
• $B%3%s%U%#%0%l!<%7%g%s$NCompiling gawk for Unix$B$r;2>H(J).
• $B%"%_%,$N%5%]!<%H(J ($B%;%/%7%g%s(J Amiga$B$G$N(Jgawk $B$N%$%s%9%H!<%k(J$B$r;2>H(J)$B!#(J