Mercurial > hg > Applications > mh
view miscellany/less-177/help.c @ 0:bce86c4163a3
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author | kono |
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date | Mon, 18 Apr 2005 23:46:02 +0900 |
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/* * Display some help. * Just invoke another "less" to display the help file. * * {{ This makes this function very simple, and makes changing the * help file very easy, but it may present difficulties on * (non-Unix) systems which do not supply the "system()" function. }} */ #include "less.h" #if __MSDOS__ #include <io.h> #include <dir.h> #include <string.h> #include <stdlib.h> extern int output_mode; #endif extern char *progname; public void help() { char *helpfile; char *cmd; helpfile = find_helpfile(); if (helpfile == NULL) { error("Cannot find help file", NULL_PARG); return; } #if __MSDOS__ putenv("LESS=-+v -+E -+s -mHPmHELP -- ?eEND -- Press g to see " "it again:Press RETURN for more., or q when done "); cmd = (char *) ecalloc(strlen(helpfile) + strlen(progname) + 50, sizeof(char)); if (output_mode == 0) sprintf(cmd, "-%s %s", progname, helpfile); else sprintf(cmd, "-%s -qVW4,4,76,23,Help %s", progname, helpfile); #else cmd = (char *) ecalloc(strlen(helpfile) + strlen(progname) + 150, sizeof(char)); sprintf(cmd, "-%s -m -H -+E -+s '-PmHELP -- ?eEND -- Press g to see it again:Press RETURN for more., or q when done ' %s", progname, helpfile); #endif free(helpfile); lsystem(cmd); error("End of help", NULL_PARG); free(cmd); }