| /* |
| * Wrapper to help enable colorized man page output. |
| * Only works with PAGER=less |
| * |
| * https://bugs.gentoo.org/184604 |
| * https://unix.stackexchange.com/questions/108699/documentation-on-less-termcap-variables |
| * |
| * Copyright 2003-2015 Gentoo Foundation |
| * Distributed under the terms of the GNU General Public License v2 |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #define COLOR(c, b) "\e[" #c ";" #b "m" |
| |
| #define _SE(termcap, col) setenv("LESS_TERMCAP_" #termcap, col, 0) |
| #define SE(termcap, c, b) _SE(termcap, COLOR(c, b)) |
| |
| static int usage(void) |
| { |
| puts( |
| "manpager: display man pages with color!\n" |
| "\n" |
| "Usage:\n" |
| "\texport MANPAGER=manpager\n" |
| "\tman man\n" |
| "\n" |
| "To control the colorization, set these env vars:\n" |
| "\tLESS_TERMCAP_mb - start blinking\n" |
| "\tLESS_TERMCAP_md - start bolding\n" |
| "\tLESS_TERMCAP_me - stop bolding\n" |
| "\tLESS_TERMCAP_us - start underlining\n" |
| "\tLESS_TERMCAP_ue - stop underlining\n" |
| "\tLESS_TERMCAP_so - start standout (reverse video)\n" |
| "\tLESS_TERMCAP_se - stop standout (reverse video)\n" |
| "\n" |
| "You can do so by doing:\n" |
| "\texport LESS_TERMCAP_md=\"$(printf '\\e[1;36m')\"\n" |
| "\n" |
| "Run 'less --help' or 'man less' for more info" |
| ); |
| return 0; |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| if (argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))) |
| return usage(); |
| |
| /* Blinking. */ |
| SE(mb, 5, 31); /* Start. */ |
| |
| /* Bolding. */ |
| SE(md, 1, 34); /* Start. */ |
| SE(me, 0, 0); /* Stop. */ |
| |
| /* Underlining. */ |
| SE(us, 4, 36); /* Start. */ |
| SE(ue, 0, 0); /* Stop. */ |
| |
| #if 0 |
| /* Standout (reverse video). */ |
| SE(so, 1, 32); /* Start. */ |
| SE(se, 0, 0); /* Stop. */ |
| #endif |
| |
| argv[0] = getenv("PAGER") ? : "less"; |
| execvp(argv[0], argv); |
| perror("could not launch PAGER"); |
| return 1; |
| } |