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Diffstat (limited to 'doc/gawk.info')
| -rw-r--r-- | doc/gawk.info | 170 |
1 files changed, 92 insertions, 78 deletions
diff --git a/doc/gawk.info b/doc/gawk.info index d6aea49f..6cb2abdb 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -26121,12 +26121,26 @@ File: gawk.info, Node: Extension Exercises, Prev: Extension summary, Up: Dyna `chmod()', and `umask()' to the file operations extension presented in *note Internal File Ops::. - 2. (Hard.) How would you provide namespaces in `gawk', so that the + 2. Write an input parser that prints a prompt if the input is a from + a "terminal" device. You can use the `isatty()' function to tell + if the input file is a terminal. (Hint: this function is usually + expensive to call; try to call it just once.) The content of the + prompt should come from a variable settable by `awk'-level code. + You can write the prompt to stanard error. However, for best + results, open a new file descriptor (or file pointer) on + `/dev/tty' and print the prompt there, in case standard error has + been redirected. + + Why is standard error a better choice than standard output for + writing the prompt? Which reading mechanism should you replace, + the one to get a record, or the one to read raw bytes? + + 3. (Hard.) How would you provide namespaces in `gawk', so that the names of functions in different extensions don't conflict with each other? If you come up with a really good scheme, contact the `gawk' maintainer to tell him about it. - 3. Write a wrapper script that provides an interface similar to `sed + 4. Write a wrapper script that provides an interface similar to `sed -i' for the "inplace" extension presented in *note Extension Sample Inplace::. @@ -33416,7 +33430,7 @@ Index * messages from extensions: Printing Messages. (line 6) * metacharacters in regular expressions: Regexp Operators. (line 6) * metacharacters, escape sequences for: Escape Sequences. (line 136) -* minimum precision supported by MPFR library: Auto-set. (line 224) +* minimum precision required by MPFR library: Auto-set. (line 224) * mktime: Time Functions. (line 25) * modifiers, in format specifiers: Format Modifiers. (line 6) * monetary information, localization: Explaining gettext. (line 104) @@ -33756,7 +33770,7 @@ Index * printing, unduplicated lines of text: Uniq Program. (line 6) * printing, user information: Id Program. (line 6) * private variables: Library Names. (line 11) -* process group idIDof gawk process: Auto-set. (line 183) +* process group ID of gawk process: Auto-set. (line 183) * process ID of gawk process: Auto-set. (line 186) * processes, two-way communications with: Two-way I/O. (line 6) * processing data: Basic High Level. (line 6) @@ -34976,79 +34990,79 @@ Node: Extension Sample API Tests1043960 Node: gawkextlib1044451 Node: Extension summary1047129 Node: Extension Exercises1050818 -Node: Language History1051540 -Node: V7/SVR3.11053196 -Node: SVR41055349 -Node: POSIX1056783 -Node: BTL1058164 -Node: POSIX/GNU1058895 -Node: Feature History1064416 -Node: Common Extensions1077514 -Node: Ranges and Locales1078886 -Ref: Ranges and Locales-Footnote-11083505 -Ref: Ranges and Locales-Footnote-21083532 -Ref: Ranges and Locales-Footnote-31083767 -Node: Contributors1083988 -Node: History summary1089528 -Node: Installation1090907 -Node: Gawk Distribution1091853 -Node: Getting1092337 -Node: Extracting1093160 -Node: Distribution contents1094797 -Node: Unix Installation1100551 -Node: Quick Installation1101168 -Node: Additional Configuration Options1103592 -Node: Configuration Philosophy1105395 -Node: Non-Unix Installation1107764 -Node: PC Installation1108222 -Node: PC Binary Installation1109542 -Node: PC Compiling1111390 -Ref: PC Compiling-Footnote-11114411 -Node: PC Testing1114520 -Node: PC Using1115696 -Node: Cygwin1119811 -Node: MSYS1120581 -Node: VMS Installation1121082 -Node: VMS Compilation1121874 -Ref: VMS Compilation-Footnote-11123103 -Node: VMS Dynamic Extensions1123161 -Node: VMS Installation Details1124845 -Node: VMS Running1127096 -Node: VMS GNV1129936 -Node: VMS Old Gawk1130671 -Node: Bugs1131141 -Node: Other Versions1135030 -Node: Installation summary1141464 -Node: Notes1142523 -Node: Compatibility Mode1143388 -Node: Additions1144170 -Node: Accessing The Source1145095 -Node: Adding Code1146530 -Node: New Ports1152687 -Node: Derived Files1157169 -Ref: Derived Files-Footnote-11162644 -Ref: Derived Files-Footnote-21162678 -Ref: Derived Files-Footnote-31163274 -Node: Future Extensions1163388 -Node: Implementation Limitations1163994 -Node: Extension Design1165242 -Node: Old Extension Problems1166396 -Ref: Old Extension Problems-Footnote-11167913 -Node: Extension New Mechanism Goals1167970 -Ref: Extension New Mechanism Goals-Footnote-11171330 -Node: Extension Other Design Decisions1171519 -Node: Extension Future Growth1173627 -Node: Old Extension Mechanism1174463 -Node: Notes summary1176225 -Node: Basic Concepts1177411 -Node: Basic High Level1178092 -Ref: figure-general-flow1178364 -Ref: figure-process-flow1178963 -Ref: Basic High Level-Footnote-11182192 -Node: Basic Data Typing1182377 -Node: Glossary1185705 -Node: Copying1217634 -Node: GNU Free Documentation License1255190 -Node: Index1280326 +Node: Language History1052314 +Node: V7/SVR3.11053970 +Node: SVR41056123 +Node: POSIX1057557 +Node: BTL1058938 +Node: POSIX/GNU1059669 +Node: Feature History1065190 +Node: Common Extensions1078288 +Node: Ranges and Locales1079660 +Ref: Ranges and Locales-Footnote-11084279 +Ref: Ranges and Locales-Footnote-21084306 +Ref: Ranges and Locales-Footnote-31084541 +Node: Contributors1084762 +Node: History summary1090302 +Node: Installation1091681 +Node: Gawk Distribution1092627 +Node: Getting1093111 +Node: Extracting1093934 +Node: Distribution contents1095571 +Node: Unix Installation1101325 +Node: Quick Installation1101942 +Node: Additional Configuration Options1104366 +Node: Configuration Philosophy1106169 +Node: Non-Unix Installation1108538 +Node: PC Installation1108996 +Node: PC Binary Installation1110316 +Node: PC Compiling1112164 +Ref: PC Compiling-Footnote-11115185 +Node: PC Testing1115294 +Node: PC Using1116470 +Node: Cygwin1120585 +Node: MSYS1121355 +Node: VMS Installation1121856 +Node: VMS Compilation1122648 +Ref: VMS Compilation-Footnote-11123877 +Node: VMS Dynamic Extensions1123935 +Node: VMS Installation Details1125619 +Node: VMS Running1127870 +Node: VMS GNV1130710 +Node: VMS Old Gawk1131445 +Node: Bugs1131915 +Node: Other Versions1135804 +Node: Installation summary1142238 +Node: Notes1143297 +Node: Compatibility Mode1144162 +Node: Additions1144944 +Node: Accessing The Source1145869 +Node: Adding Code1147304 +Node: New Ports1153461 +Node: Derived Files1157943 +Ref: Derived Files-Footnote-11163418 +Ref: Derived Files-Footnote-21163452 +Ref: Derived Files-Footnote-31164048 +Node: Future Extensions1164162 +Node: Implementation Limitations1164768 +Node: Extension Design1166016 +Node: Old Extension Problems1167170 +Ref: Old Extension Problems-Footnote-11168687 +Node: Extension New Mechanism Goals1168744 +Ref: Extension New Mechanism Goals-Footnote-11172104 +Node: Extension Other Design Decisions1172293 +Node: Extension Future Growth1174401 +Node: Old Extension Mechanism1175237 +Node: Notes summary1176999 +Node: Basic Concepts1178185 +Node: Basic High Level1178866 +Ref: figure-general-flow1179138 +Ref: figure-process-flow1179737 +Ref: Basic High Level-Footnote-11182966 +Node: Basic Data Typing1183151 +Node: Glossary1186479 +Node: Copying1218408 +Node: GNU Free Documentation License1255964 +Node: Index1281100 End Tag Table |