?? help.c
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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;#endifextern char *progname; public voidhelp(){ 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);}
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