Histloc_t hist_find(History_t *hp, char *string, int index1, int flag, int direction) {
int index2;
off_t offset;
int *coffset = NULL;
Histloc_t location;
location.hist_command = -1;
location.hist_char = 0;
location.hist_line = 0;
if (!hp) return location;
// Leading ^ means beginning of line unless escaped.
if (flag) {
index2 = *string;
if (index2 == '\\') {
string++;
} else if (index2 == '^') {
flag = 0;
string++;
}
}
if (flag) coffset = &location.hist_char;
index2 = (int)hp->histind;
if (direction < 0) {
index2 -= hp->histsize;
if (index2 < 1) index2 = 1;
if (index1 <= index2) return location;
} else if (index1 >= index2) {
return location;
}
while (index1 != index2) {
direction > 0 ? ++index1 : --index1;
offset = hist_tell(hp, index1);
if ((location.hist_line = hist_match(hp, offset, string, coffset)) >= 0) {
location.hist_command = index1;
return location;
}
// Allow a search to be aborted.
if (hp->histshell->trapnote & SH_SIGSET) break;
}
return location;
}
int b_hist(int argc,char *argv[], void *extra)
{
register History_t *hp;
register char *arg;
register int flag,fdo;
register Shell_t *shp = ((Shbltin_t*)extra)->shp;
Sfio_t *outfile;
char *fname;
int range[2], incr, index2, indx= -1;
char *edit = 0; /* name of editor */
char *replace = 0; /* replace old=new */
int lflag = 0, nflag = 0, rflag = 0;
#if SHOPT_HISTEXPAND
int pflag = 0;
#endif
Histloc_t location;
NOT_USED(argc);
if(!sh_histinit((void*)shp))
errormsg(SH_DICT,ERROR_system(1),e_histopen);
hp = shp->gd->hist_ptr;
while((flag = optget(argv,sh_opthist))) switch(flag)
{
case 'e':
edit = opt_info.arg;
break;
case 'n':
nflag++;
break;
case 'l':
lflag++;
break;
case 'r':
rflag++;
break;
case 's':
edit = "-";
break;
#if SHOPT_HISTEXPAND
case 'p':
pflag++;
break;
#endif
case 'N':
if(indx<=0)
{
if((flag = hist_max(hp) - opt_info.num-1) < 0)
flag = 1;
range[++indx] = flag;
break;
}
case ':':
errormsg(SH_DICT,2, "%s", opt_info.arg);
break;
case '?':
errormsg(SH_DICT,ERROR_usage(2), "%s", opt_info.arg);
break;
}
if(error_info.errors)
errormsg(SH_DICT,ERROR_usage(2),"%s",optusage((char*)0));
argv += (opt_info.index-1);
#if SHOPT_HISTEXPAND
if(pflag)
{
hist_cancel(hp);
pflag = 0;
while(arg=argv[1])
{
flag = hist_expand(arg,&replace);
if(!(flag & HIST_ERROR))
sfputr(sfstdout, replace, '\n');
else
pflag = 1;
if(replace)
free(replace);
argv++;
}
return pflag;
}
#endif
flag = indx;
while(flag<1 && (arg=argv[1]))
{
/* look for old=new argument */
if(!replace && strchr(arg+1,'='))
{
replace = arg;
argv++;
continue;
}
else if(isdigit(*arg) || *arg == '-')
{
/* see if completely numeric */
do arg++;
while(isdigit(*arg));
if(*arg==0)
{
arg = argv[1];
range[++flag] = (int)strtol(arg, (char**)0, 10);
if(*arg == '-')
range[flag] += (hist_max(hp)-1);
argv++;
continue;
}
}
/* search for last line starting with string */
location = hist_find(hp,argv[1],hist_max(hp)-1,0,-1);
if((range[++flag] = location.hist_command) < 0)
errormsg(SH_DICT,ERROR_exit(1),e_found,argv[1]);
argv++;
}
if(flag <0)
{
/* set default starting range */
if(lflag)
{
flag = hist_max(hp)-16;
if(flag<1)
flag = 1;
}
else
flag = hist_max(hp)-2;
range[0] = flag;
flag = 0;
}
index2 = hist_min(hp);
if(range[0]<index2)
range[0] = index2;
if(flag==0)
/* set default termination range */
range[1] = ((lflag && !edit)?hist_max(hp)-1:range[0]);
if(range[1]>=(flag=(hist_max(hp) - !lflag)))
range[1] = flag;
/* check for valid ranges */
if(range[1]<index2 || range[0]>=flag)
errormsg(SH_DICT,ERROR_exit(1),e_badrange,range[0],range[1]);
if(edit && *edit=='-' && range[0]!=range[1])
errormsg(SH_DICT,ERROR_exit(1),e_eneedsarg);
/* now list commands from range[rflag] to range[1-rflag] */
incr = 1;
flag = rflag>0;
if(range[1-flag] < range[flag])
incr = -1;
if(lflag)
{
outfile = sfstdout;
arg = "\n\t";
}
else
{
if(!(fname=pathtmp(NIL(char*),0,0,NIL(int*))))
errormsg(SH_DICT,ERROR_exit(1),e_create,"");
if((fdo=open(fname,O_CREAT|O_RDWR,S_IRUSR|S_IWUSR)) < 0)
errormsg(SH_DICT,ERROR_system(1),e_create,fname);
outfile= sfnew(NIL(Sfio_t*),shp->outbuff,IOBSIZE,fdo,SF_WRITE);
arg = "\n";
nflag++;
}
while(1)
{
if(nflag==0)
sfprintf(outfile,"%d\t",range[flag]);
else if(lflag)
sfputc(outfile,'\t');
hist_list(shp->gd->hist_ptr,outfile,hist_tell(shp->gd->hist_ptr,range[flag]),0,arg);
if(lflag)
sh_sigcheck(shp);
if(range[flag] == range[1-flag])
break;
range[flag] += incr;
}
if(lflag)
return(0);
sfclose(outfile);
hist_eof(hp);
arg = edit;
if(!arg && !(arg=nv_getval(sh_scoped(shp,HISTEDIT))) && !(arg=nv_getval(sh_scoped(shp,FCEDNOD))))
arg = (char*)e_defedit;
#ifdef apollo
/*
* Code to support the FC using the pad editor.
* Exampled of how to use: HISTEDIT=pad
*/
if (strcmp (arg, "pad") == 0)
{
extern int pad_create(char*);
sh_close(fdo);
fdo = pad_create(fname);
pad_wait(fdo);
unlink(fname);
strcat(fname, ".bak");
unlink(fname);
lseek(fdo,(off_t)0,SEEK_SET);
}
else
{
#endif /* apollo */
if(*arg != '-')
{
char *com[3];
com[0] = arg;
com[1] = fname;
com[2] = 0;
error_info.errors = sh_eval(sh_sfeval(com),0);
}
fdo = sh_chkopen(fname);
unlink(fname);
free((void*)fname);
#ifdef apollo
}
#endif /* apollo */
/* don't history fc itself unless forked */
error_info.flags |= ERROR_SILENT;
if(!sh_isstate(SH_FORKED))
hist_cancel(hp);
sh_onstate(SH_HISTORY);
sh_onstate(SH_VERBOSE); /* echo lines as read */
if(replace)
hist_subst(error_info.id,fdo,replace);
else if(error_info.errors == 0)
{
char buff[IOBSIZE+1];
Sfio_t *iop = sfnew(NIL(Sfio_t*),buff,IOBSIZE,fdo,SF_READ);
/* read in and run the command */
if(shp->hist_depth++ > HIST_RECURSE)
errormsg(SH_DICT,ERROR_exit(1),e_toodeep,"history");
sh_eval(iop,1);
shp->hist_depth--;
}
