static char *fmtx(const char *string)
{
register const char *cp = string;
register int n,c;
unsigned char *state = (unsigned char*)sh_lexstates[2];
int offset = staktell();
if(*cp=='#' || *cp=='~')
stakputc('\\');
while((c=mbchar(cp)),(c>UCHAR_MAX)||(n=state[c])==0 || n==S_EPAT);
if(n==S_EOF && *string!='#')
return((char*)string);
stakwrite(string,--cp-string);
for(string=cp;c=mbchar(cp);string=cp)
{
if((n=cp-string)==1)
{
if((n=state[c]) && n!=S_EPAT)
stakputc('\\');
stakputc(c);
}
else
stakwrite(string,n);
}
stakputc(0);
return(stakptr(offset));
}
static void
addmatch(register glob_t* gp, const char* dir, const char* pat, register const char* rescan, char* endslash, int meta)
{
register globlist_t* ap;
int offset;
int type;
stakseek(MATCHPATH(gp));
if (dir)
{
stakputs(dir);
stakputc(gp->gl_delim);
}
if (endslash)
*endslash = 0;
stakputs(pat);
if (rescan)
{
if ((*gp->gl_type)(gp, stakptr(MATCHPATH(gp)), 0) != GLOB_DIR)
return;
stakputc(gp->gl_delim);
offset = staktell();
/* if null, reserve room for . */
if (*rescan)
stakputs(rescan);
else
stakputc(0);
stakputc(0);
rescan = stakptr(offset);
ap = (globlist_t*)stakfreeze(0);
ap->gl_begin = (char*)rescan;
ap->gl_next = gp->gl_rescan;
gp->gl_rescan = ap;
}
else
{
if (!endslash && (gp->gl_flags & GLOB_MARK) && (type = (*gp->gl_type)(gp, stakptr(MATCHPATH(gp)), 0)))
{
if ((gp->gl_flags & GLOB_COMPLETE) && type != GLOB_EXE)
{
stakseek(0);
return;
}
else if (type == GLOB_DIR && (gp->gl_flags & GLOB_MARK))
stakputc(gp->gl_delim);
}
ap = (globlist_t*)stakfreeze(1);
ap->gl_next = gp->gl_match;
gp->gl_match = ap;
gp->gl_pathc++;
}
ap->gl_flags = MATCH_RAW|meta;
if (gp->gl_flags & GLOB_COMPLETE)
ap->gl_flags |= MATCH_MAKE;
}
static int sig_number(Shell_t *shp,const char *string)
{
const Shtable_t *tp;
register int n,o,sig=0;
char *last, *name;
if(isdigit(*string))
{
n = strtol(string,&last,10);
if(*last)
n = -1;
}
else
{
register int c;
o = staktell();
do
{
c = *string++;
if(islower(c))
c = toupper(c);
stakputc(c);
}
while(c);
stakseek(o);
if(memcmp(stakptr(o),"SIG",3)==0)
{
sig = 1;
o += 3;
if(isdigit(*stakptr(o)))
{
n = strtol(stakptr(o),&last,10);
if(!*last)
return(n);
}
}
tp = sh_locate(stakptr(o),(const Shtable_t*)shtab_signals,sizeof(*shtab_signals));
n = tp->sh_number;
if(sig==1 && (n>=(SH_TRAP-1) && n < (1<<SH_SIGBITS)))
{
/* sig prefix cannot match internal traps */
n = 0;
tp = (Shtable_t*)((char*)tp + sizeof(*shtab_signals));
if(strcmp(stakptr(o),tp->sh_name)==0)
n = tp->sh_number;
}
if((n>>SH_SIGBITS)&SH_SIGRUNTIME)
n = shp->gd->sigruntime[(n&((1<<SH_SIGBITS)-1))-1];
else
{
n &= (1<<SH_SIGBITS)-1;
if(n < SH_TRAP)
n--;
}
if(n<0 && shp->gd->sigruntime[1] && (name=stakptr(o)) && *name++=='R' && *name++=='T')
{
if(name[0]=='M' && name[1]=='I' && name[2]=='N' && name[3]=='+')
{
if((sig=(int)strtol(name+4,&name,10)) >= 0 && !*name)
n = shp->gd->sigruntime[SH_SIGRTMIN] + sig;
}
else if(name[0]=='M' && name[1]=='A' && name[2]=='X' && name[3]=='-')
{
if((sig=(int)strtol(name+4,&name,10)) >= 0 && !*name)
n = shp->gd->sigruntime[SH_SIGRTMAX] - sig;
}
else if((sig=(int)strtol(name,&name,10)) > 0 && !*name)
n = shp->gd->sigruntime[SH_SIGRTMIN] + sig - 1;
if(n<shp->gd->sigruntime[SH_SIGRTMIN] || n>shp->gd->sigruntime[SH_SIGRTMAX])
n = -1;
}
}
void ed_setup(register Edit_t *ep, int fd, int reedit)
{
Shell_t *shp = ep->sh;
register char *pp;
register char *last, *prev;
char *ppmax;
int myquote = 0, n;
register int qlen = 1, qwid;
char inquote = 0;
ep->e_fd = fd;
ep->e_multiline = sh_isoption(SH_MULTILINE)!=0;
#ifdef SIGWINCH
if(!(shp->sigflag[SIGWINCH]&SH_SIGFAULT))
{
signal(SIGWINCH,sh_fault);
shp->sigflag[SIGWINCH] |= SH_SIGFAULT;
}
pp = shp->st.trapcom[SIGWINCH];
shp->st.trapcom[SIGWINCH] = 0;
sh_fault(SIGWINCH);
shp->st.trapcom[SIGWINCH] = pp;
ep->sh->winch = 0;
#endif
#if SHOPT_EDPREDICT
ep->hlist = 0;
ep->nhlist = 0;
ep->hoff = 0;
#endif /* SHOPT_EDPREDICT */
#if KSHELL
ep->e_stkptr = stakptr(0);
ep->e_stkoff = staktell();
if(!(last = shp->prompt))
last = "";
shp->prompt = 0;
#else
last = ep->e_prbuff;
#endif /* KSHELL */
if(shp->gd->hist_ptr)
{
register History_t *hp = shp->gd->hist_ptr;
ep->e_hismax = hist_max(hp);
ep->e_hismin = hist_min(hp);
}
else
{
ep->e_hismax = ep->e_hismin = ep->e_hloff = 0;
}
ep->e_hline = ep->e_hismax;
if(!sh_isoption(SH_VI) && !sh_isoption(SH_EMACS) && !sh_isoption(SH_GMACS))
ep->e_wsize = MAXLINE;
else
ep->e_wsize = ed_window()-2;
ep->e_winsz = ep->e_wsize+2;
ep->e_crlf = 1;
ep->e_plen = 0;
pp = ep->e_prompt;
ppmax = pp+PRSIZE-1;
*pp++ = '\r';
{
register int c;
while(prev = last, c = mbchar(last)) switch(c)
{
case ESC:
{
int skip=0;
ep->e_crlf = 0;
*pp++ = c;
for(n=1; c = *last++; n++)
{
if(pp < ppmax)
*pp++ = c;
if(c=='\a' || c==ESC || c=='\r')
break;
if(skip || (c>='0' && c<='9'))
{
skip = 0;
continue;
}
if(n>1 && c==';')
skip = 1;
else if(n>2 || (c!= '[' && c!= ']'))
break;
}
if(c==0 || c==ESC || c=='\r')
last--;
qlen += (n+1);
break;
}
case '\b':
if(pp>ep->e_prompt+1)
pp--;
break;
case '\r':
if(pp == (ep->e_prompt+2)) /* quote char */
myquote = *(pp-1);
/*FALLTHROUGH*/
case '\n':
/* start again */
ep->e_crlf = 1;
qlen = 1;
inquote = 0;
pp = ep->e_prompt+1;
break;
case '\t':
/* expand tabs */
while((pp-ep->e_prompt)%TABSIZE)
{
if(pp >= ppmax)
break;
*pp++ = ' ';
}
break;
case '\a':
/* cut out bells */
break;
default:
if(c==myquote)
{
qlen += inquote;
inquote ^= 1;
}
if(pp < ppmax)
{
if(inquote)
qlen++;
else if(!is_print(c))
ep->e_crlf = 0;
if((qwid = last - prev) > 1)
qlen += qwid - mbwidth(c);
while(prev < last && pp < ppmax)
*pp++ = *prev++;
}
break;
}
}
if(pp-ep->e_prompt > qlen)
ep->e_plen = pp - ep->e_prompt - qlen;
*pp = 0;
if(!ep->e_multiline && (ep->e_wsize -= ep->e_plen) < 7)
{
register int shift = 7-ep->e_wsize;
ep->e_wsize = 7;
pp = ep->e_prompt+1;
strcpy(pp,pp+shift);
ep->e_plen -= shift;
last[-ep->e_plen-2] = '\r';
}
sfsync(sfstderr);
if(fd == sffileno(sfstderr))
{
/* can't use output buffer when reading from stderr */
static char *buff;
if(!buff)
buff = (char*)malloc(MAXLINE);
ep->e_outbase = ep->e_outptr = buff;
ep->e_outlast = ep->e_outptr + MAXLINE;
return;
}
qlen = sfset(sfstderr,SF_READ,0);
/* make sure SF_READ not on */
ep->e_outbase = ep->e_outptr = (char*)sfreserve(sfstderr,SF_UNBOUND,SF_LOCKR);
ep->e_outlast = ep->e_outptr + sfvalue(sfstderr);
if(qlen)
sfset(sfstderr,SF_READ,1);
sfwrite(sfstderr,ep->e_outptr,0);
ep->e_eol = reedit;
if(ep->e_multiline)
{
#ifdef _cmd_tput
char *term;
if(!ep->e_term)
ep->e_term = nv_search("TERM",shp->var_tree,0);
if(ep->e_term && (term=nv_getval(ep->e_term)) && strlen(term)<sizeof(ep->e_termname) && strcmp(term,ep->e_termname))
{
sh_trap(".sh.subscript=$(tput cuu1 2>/dev/null)",0);
if(pp=nv_getval(SH_SUBSCRNOD))
strncpy(CURSOR_UP,pp,sizeof(CURSOR_UP)-1);
nv_unset(SH_SUBSCRNOD);
strcpy(ep->e_termname,term);
}
#endif
ep->e_wsize = MAXLINE - (ep->e_plen+1);
}
if(ep->e_default && (pp = nv_getval(ep->e_default)))
{
n = strlen(pp);
if(n > LOOKAHEAD)
n = LOOKAHEAD;
ep->e_lookahead = n;
while(n-- > 0)
ep->e_lbuf[n] = *pp++;
ep->e_default = 0;
}
}
/*
* open the history file
* if HISTNAME is not given and userid==0 then no history file.
* if login_sh and HISTFILE is longer than HIST_MAX bytes then it is
* cleaned up.
* hist_open() returns 1, if history file is open
*/
int sh_histinit(void *sh_context)
{
Shell_t *shp = (Shell_t*)sh_context;
register int fd;
register History_t *hp;
register char *histname;
char *fname=0;
int histmask, maxlines, hist_start=0;
register char *cp;
register off_t hsize = 0;
if(shgd->hist_ptr=hist_ptr)
return(1);
if(!(histname = nv_getval(HISTFILE)))
{
int offset = staktell();
if(cp=nv_getval(HOME))
stakputs(cp);
stakputs(hist_fname);
stakputc(0);
stakseek(offset);
histname = stakptr(offset);
}
#ifdef future
if(hp=wasopen)
{
/* reuse history file if same name */
wasopen = 0;
shgd->hist_ptr = hist_ptr = hp;
if(strcmp(histname,hp->histname)==0)
return(1);
else
hist_free();
}
#endif
retry:
cp = path_relative(shp,histname);
if(!histinit)
histmode = S_IRUSR|S_IWUSR;
if((fd=open(cp,O_BINARY|O_APPEND|O_RDWR|O_CREAT,histmode))>=0)
{
hsize=lseek(fd,(off_t)0,SEEK_END);
}
if((unsigned)fd <=2)
{
int n;
if((n=fcntl(fd,F_DUPFD,10))>=0)
{
close(fd);
fd=n;
}
}
/* make sure that file has history file format */
if(hsize && hist_check(fd))
{
close(fd);
hsize = 0;
if(unlink(cp)>=0)
goto retry;
fd = -1;
}
if(fd < 0)
{
#if KSHELL
/* don't allow root a history_file in /tmp */
if(shgd->userid)
#endif /* KSHELL */
{
if(!(fname = pathtmp(NIL(char*),0,0,NIL(int*))))
return(0);
fd = open(fname,O_BINARY|O_APPEND|O_CREAT|O_RDWR,S_IRUSR|S_IWUSR);
}
}
if(fd<0)
return(0);
/* set the file to close-on-exec */
fcntl(fd,F_SETFD,FD_CLOEXEC);
if(cp=nv_getval(HISTSIZE))
maxlines = (unsigned)strtol(cp, (char**)0, 10);
else
maxlines = HIST_DFLT;
for(histmask=16;histmask <= maxlines; histmask <<=1 );
if(!(hp=new_of(History_t,(--histmask)*sizeof(off_t))))
{
close(fd);
return(0);
}
shgd->hist_ptr = hist_ptr = hp;
hp->histshell = (void*)shp;
hp->histsize = maxlines;
hp->histmask = histmask;
hp->histfp= sfnew(NIL(Sfio_t*),hp->histbuff,HIST_BSIZE,fd,SF_READ|SF_WRITE|SF_APPENDWR|SF_SHARE);
memset((char*)hp->histcmds,0,sizeof(off_t)*(hp->histmask+1));
hp->histind = 1;
hp->histcmds[1] = 2;
hp->histcnt = 2;
hp->histname = strdup(histname);
hp->histdisc = hist_disc;
if(hsize==0)
{
/* put special characters at front of file */
sfwrite(hp->histfp,(char*)hist_stamp,2);
sfsync(hp->histfp);
}
/* initialize history list */
else
{
int first,last;
off_t mark,size = (HIST_MAX/4)+maxlines*HIST_LINE;
hp->histind = first = hist_nearend(hp,hp->histfp,hsize-size);
histinit = 1;
hist_eof(hp); /* this sets histind to last command */
if((hist_start = (last=(int)hp->histind)-maxlines) <=0)
hist_start = 1;
mark = hp->histmarker;
while(first > hist_start)
{
size += size;
first = hist_nearend(hp,hp->histfp,hsize-size);
hp->histind = first;
}
histinit = hist_start;
hist_eof(hp);
if(!histinit)
{
sfseek(hp->histfp,hp->histcnt=hsize,SEEK_SET);
hp->histind = last;
hp->histmarker = mark;
}
histinit = 0;
}
if(fname)
{
unlink(fname);
free((void*)fname);
}
if(hist_clean(fd) && hist_start>1 && hsize > HIST_MAX)
{
#ifdef DEBUG
sfprintf(sfstderr,"%d: hist_trim hsize=%d\n",getpid(),hsize);
sfsync(sfstderr);
#endif /* DEBUG */
hp = hist_trim(hp,(int)hp->histind-maxlines);
}
sfdisc(hp->histfp,&hp->histdisc);
#if KSHELL
(HISTCUR)->nvalue.lp = (&hp->histind);
#endif /* KSHELL */
sh_timeradd(1000L*(HIST_RECENT-30), 1, hist_touch, (void*)hp->histname);
#if SHOPT_ACCTFILE
if(sh_isstate(SH_INTERACTIVE))
acctinit(hp);
#endif /* SHOPT_ACCTFILE */
#if SHOPT_AUDIT
{
char buff[SF_BUFSIZE];
hp->auditfp = 0;
if(sh_isstate(SH_INTERACTIVE) && (hp->auditmask=sh_checkaudit(hp,SHOPT_AUDITFILE, buff, sizeof(buff))))
{
if((fd=sh_open(buff,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,S_IRUSR|S_IWUSR))>=0 && fd < 10)
{
int n;
if((n = sh_fcntl(fd,F_DUPFD, 10)) >= 0)
{
sh_close(fd);
fd = n;
}
}
if(fd>=0)
{
fcntl(fd,F_SETFD,FD_CLOEXEC);
hp->tty = strdup(ttyname(2));
hp->auditfp = sfnew((Sfio_t*)0,NULL,-1,fd,SF_WRITE);
}
}
}
#endif
return(1);
}
int wordexp(const char *string, wordexp_t *wdarg, register int flags)
{
register Sfio_t *iop;
register char *cp=(char*)string;
register int c,quoted=0,literal=0,ac=0;
int offset;
char *savebase,**av;
if(offset=staktell())
savebase = stakfreeze(0);
if(flags&WRDE_REUSE)
wordfree(wdarg);
else if(!(flags&WRDE_APPEND))
{
wdarg->we_wordv = 0;
wdarg->we_wordc = 0;
}
if(flags&WRDE_UNDEF)
stakwrite("set -u\n",7);
if(!(flags&WRDE_SHOWERR))
stakwrite("exec 2> /dev/null\n",18);
stakwrite("print -f \"%q\\n\" ",16);
if(*cp=='#')
stakputc('\\');
while(c = *cp++)
{
if(c=='\'' && !quoted)
literal = !literal;
else if(!literal)
{
if(c=='\\' && (!quoted || strchr("\\\"`\n$",c)))
{
stakputc('\\');
if(c= *cp)
cp++;
else
c = '\\';
}
else if(c=='"')
quoted = !quoted;
else if(c=='`' || (c=='$' && *cp=='('))
{
if(flags&WRDE_NOCMD)
{
c=WRDE_CMDSUB;
goto err;
}
/* only the shell can parse the rest */
stakputs(cp-1);
break;
}
else if(!quoted && strchr("|&\n;<>"+ac,c))
{
c=WRDE_BADCHAR;
goto err;
}
else if(c=='(') /* allow | and & inside pattern */
ac=2;
}
stakputc(c);
}
stakputc(0);
if(!(iop = sfpopen((Sfio_t*)0,stakptr(0),"r")))
{
c = WRDE_NOSHELL;
goto err;
}
stakseek(0);
ac = 0;
while((c=sfgetc(iop)) != EOF)
{
if(c=='\'')
quoted = ! quoted;
else if(!quoted && (c==' ' || c=='\n'))
{
ac++;
c = 0;
}
stakputc(c);
}
if(c=sfclose(iop))
{
if(c==3 || !(flags&WRDE_UNDEF))
c=WRDE_SYNTAX;
else
c=WRDE_BADVAL;
goto err;
}
c = ac+2;
if(flags&WRDE_DOOFFS)
c += wdarg->we_offs;
if(flags&WRDE_APPEND)
av = (char**)realloc((void*)&wdarg->we_wordv[-1], (wdarg->we_wordc+c)*sizeof(char*));
else if(av = (char**)malloc(c*sizeof(char*)))
{
if(flags&WRDE_DOOFFS)
memset((void*)av,0,(wdarg->we_offs+1)*sizeof(char*));
else
av[0] = 0;
}
if(!av)
return(WRDE_NOSPACE);
c = staktell();
if(!(cp = (char*)malloc(sizeof(char*)+c)))
{
c=WRDE_NOSPACE;
goto err;
}
((struct list*)cp)->next = (struct list*)(*av);
*av++ = (char*)cp;
cp += sizeof(char*);
wdarg->we_wordv = av;
if(flags&WRDE_APPEND)
av += wdarg->we_wordc;
wdarg->we_wordc += ac;
if(flags&WRDE_DOOFFS)
av += wdarg->we_offs;
memcpy((void*)cp,stakptr(offset),c);
while(ac-- > 0)
{
*av++ = cp;
sh_unquote(cp);
while(c= *cp++);
}
*av = 0;
c=0;
err:
if(offset)
stakset(savebase,offset);
else
stakseek(0);
return(c);
}
int test_unop(Shell_t *shp,register int op,register const char *arg)
{
struct stat statb;
int f;
switch(op)
{
case 'r':
return(permission(arg, R_OK));
case 'w':
return(permission(arg, W_OK));
case 'x':
return(permission(arg, X_OK));
case 'V':
#if SHOPT_FS_3D
{
register int offset = staktell();
if(stat(arg,&statb)<0 || !S_ISREG(statb.st_mode))
return(0);
/* add trailing / */
stakputs(arg);
stakputc('/');
stakputc(0);
arg = (const char*)stakptr(offset);
stakseek(offset);
/* FALL THRU */
}
#else
return(0);
#endif /* SHOPT_FS_3D */
case 'd':
return(test_stat(arg,&statb)>=0 && S_ISDIR(statb.st_mode));
case 'c':
return(test_stat(arg,&statb)>=0 && S_ISCHR(statb.st_mode));
case 'b':
return(test_stat(arg,&statb)>=0 && S_ISBLK(statb.st_mode));
case 'f':
return(test_stat(arg,&statb)>=0 && S_ISREG(statb.st_mode));
case 'u':
return(test_mode(arg)&S_ISUID);
case 'g':
return(test_mode(arg)&S_ISGID);
case 'k':
#ifdef S_ISVTX
return(test_mode(arg)&S_ISVTX);
#else
return(0);
#endif /* S_ISVTX */
#if SHOPT_TEST_L
case 'l':
#endif
case 'L':
case 'h': /* undocumented, and hopefully will disappear */
if(*arg==0 || arg[strlen(arg)-1]=='/' || lstat(arg,&statb)<0)
return(0);
return(S_ISLNK(statb.st_mode));
case 'C':
#ifdef S_ISCTG
return(test_stat(arg,&statb)>=0 && S_ISCTG(statb.st_mode));
#else
return(0);
#endif /* S_ISCTG */
case 'H':
#ifdef S_ISCDF
{
register int offset = staktell();
if(test_stat(arg,&statb)>=0 && S_ISCDF(statb.st_mode))
return(1);
stakputs(arg);
stakputc('+');
stakputc(0);
arg = (const char*)stakptr(offset);
stakseek(offset);
return(test_stat(arg,&statb)>=0 && S_ISCDF(statb.st_mode));
}
#else
return(0);
#endif /* S_ISCDF */
case 'S':
return(isasock(arg,&statb));
case 'N':
return(test_stat(arg,&statb)>=0 && tmxgetmtime(&statb) > tmxgetatime(&statb));
case 'p':
return(isapipe(arg,&statb));
case 'n':
return(*arg != 0);
case 'z':
return(*arg == 0);
case 's':
sfsync(sfstdout);
case 'O':
case 'G':
if(*arg==0 || test_stat(arg,&statb)<0)
return(0);
if(op=='s')
return(statb.st_size>0);
else if(op=='O')
return(statb.st_uid==shp->gd->userid);
return(statb.st_gid==shp->gd->groupid);
case 'a':
case 'e':
if(memcmp(arg,"/dev/",5)==0 && sh_open(arg,O_NONBLOCK))
return(1);
return(permission(arg, F_OK));
case 'o':
f=1;
if(*arg=='?')
return(sh_lookopt(arg+1,&f)>0);
op = sh_lookopt(arg,&f);
return(op && (f==(sh_isoption(op)!=0)));
case 't':
{
char *last;
op = strtol(arg,&last, 10);
return(*last?0:tty_check(op));
}
case 'v':
case 'R':
{
Namval_t *np;
Namarr_t *ap;
int isref;
if(!(np = nv_open(arg,shp->var_tree,NV_VARNAME|NV_NOFAIL|NV_NOADD|NV_NOREF)))
return(0);
isref = nv_isref(np);
if(op=='R')
return(isref);
if(isref)
{
if(np->nvalue.cp)
np = nv_refnode(np);
else
return(0);
}
if(ap = nv_arrayptr(np))
return(nv_arrayisset(np,ap));
return(!nv_isnull(np) || nv_isattr(np,NV_INTEGER));
}
default:
{
static char a[3] = "-?";
a[1]= op;
errormsg(SH_DICT,ERROR_exit(2),e_badop,a);
/* NOTREACHED */
return(0);
}
}
}
static int
intercept(Sfio_t* sp, int level, int flags)
{
register Rule_t* r;
char* m;
char* s;
char* t;
char* e;
int n;
int i;
Sfio_t* tmp;
NoP(sp);
NoP(flags);
if ((state.mam.level = level) > 0 && !state.hold && (r = internal.error) && (r->property & (P_functional|P_target)) == (P_functional|P_target) && !state.compileonly && !state.interrupt && (m = stakptr(0)) && (n = staktell()) > 0)
{
/*
* make the error trap
*/
state.hold = m;
while (*m && *m != ':')
m++;
while (isspace(*++m));
n -= m - state.hold;
tmp = sfstropen();
sfprintf(tmp, "%d %-.*s", level, n, m);
s = sfstruse(tmp);
/*
* return [ level | - ] [ message ]
* level is new level or - to retain old
* omitted message means it has been printed
*/
if (t = call(r, s))
{
i = strtol(t, &e, 0);
if (e > t)
{
t = e;
level = i;
}
else if (*t == '-')
t++;
while (isspace(*t))
t++;
}
if (!t || !*t)
{
level |= ERROR_OUTPUT;
message((-1, "suppressed %s message: `%-.*s'", level == 1 ? "warning" : "error", n, m));
}
sfstrclose(tmp);
state.hold = 0;
}
return level;
}
static char *parse_subst(const char *s, struct subst *sb)
{
char *cp,del;
int off,n = 0;
/* build the strings on the stack, mainly for '&' substition in "new" */
off = staktell();
/* init "new" with empty string */
if(sb->str[1])
free(sb->str[1]);
sb->str[1] = strdup("");
/* get delimiter */
del = *s;
cp = (char*) s + 1;
while(n < 2)
{
if(*cp == del || *cp == '\n' || *cp == '\0')
{
/* delimiter or EOL */
if(staktell() != off)
{
/* dupe string on stack and rewind stack */
stakputc('\0');
if(sb->str[n])
free(sb->str[n]);
sb->str[n] = strdup(stakptr(off));
stakseek(off);
}
n++;
/* if not delimiter, we've reached EOL. Get outta here. */
if(*cp != del)
break;
}
else if(*cp == '\\')
{
if(*(cp+1) == del) /* quote delimiter */
{
stakputc(del);
cp++;
}
else if(*(cp+1) == '&' && n == 1)
{ /* quote '&' only in "new" */
stakputc('&');
cp++;
}
else
stakputc('\\');
}
else if(*cp == '&' && n == 1 && sb->str[0])
/* substitute '&' with "old" in "new" */
stakputs(sb->str[0]);
else
stakputc(*cp);
cp++;
}
/* rewind stack */
stakseek(off);
return cp;
}
int hist_expand(const char *ln, char **xp)
{
int off, /* stack offset */
q, /* quotation flags */
p, /* flag */
c, /* current char */
flag=0; /* HIST_* flags */
Sfoff_t n, /* history line number, counter, etc. */
i, /* counter */
w[2]; /* word range */
char *sp, /* stack pointer */
*cp, /* current char in ln */
*str, /* search string */
*evp, /* event/word designator string, for error msgs */
*cc=0, /* copy of current line up to cp; temp ptr */
hc[3], /* default histchars */
*qc="\'\"`"; /* quote characters */
Sfio_t *ref=0, /* line referenced by event designator */
*tmp=0, /* temporary line buffer */
*tmp2=0;/* temporary line buffer */
Histloc_t hl; /* history location */
static Namval_t *np = 0; /* histchars variable */
static struct subst sb = {0,0}; /* substition strings */
static Sfio_t *wm=0; /* word match from !?string? event designator */
if(!wm)
wm = sfopen(NULL, NULL, "swr");
hc[0] = '!';
hc[1] = '^';
hc[2] = 0;
if((np = nv_open("histchars",sh.var_tree,0)) && (cp = nv_getval(np)))
{
if(cp[0])
{
hc[0] = cp[0];
if(cp[1])
{
hc[1] = cp[1];
if(cp[2])
hc[2] = cp[2];
}
}
}
/* save shell stack */
if(off = staktell())
sp = stakfreeze(0);
cp = (char*)ln;
while(cp && *cp)
{
/* read until event/quick substitution/comment designator */
if((*cp != hc[0] && *cp != hc[1] && *cp != hc[2])
|| (*cp == hc[1] && cp != ln))
{
if(*cp == '\\') /* skip escaped designators */
stakputc(*cp++);
else if(*cp == '\'') /* skip quoted designators */
{
do
stakputc(*cp);
while(*++cp && *cp != '\'');
}
stakputc(*cp++);
continue;
}
if(hc[2] && *cp == hc[2]) /* history comment designator, skip rest of line */
{
stakputc(*cp++);
stakputs(cp);
DONE();
}
n = -1;
str = 0;
flag &= HIST_EVENT; /* save event flag for returning later */
evp = cp;
ref = 0;
if(*cp == hc[1]) /* shortcut substitution */
{
flag |= HIST_QUICKSUBST;
goto getline;
}
if(*cp == hc[0] && *(cp+1) == hc[0]) /* refer to line -1 */
{
cp += 2;
goto getline;
}
switch(c = *++cp) {
case ' ':
case '\t':
case '\n':
case '\0':
case '=':
case '(':
stakputc(hc[0]);
continue;
case '#': /* the line up to current position */
flag |= HIST_HASH;
cp++;
n = staktell(); /* terminate string and dup */
stakputc('\0');
cc = strdup(stakptr(0));
stakseek(n); /* remove null byte again */
ref = sfopen(ref, cc, "s"); /* open as file */
n = 0; /* skip history file referencing */
break;
case '-': /* back reference by number */
if(!isdigit(*(cp+1)))
goto string_event;
cp++;
case '0': /* reference by number */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
n = 0;
while(isdigit(*cp))
n = n * 10 + (*cp++) - '0';
if(c == '-')
n = -n;
break;
case '$':
n = -1;
case ':':
break;
case '?':
cp++;
flag |= HIST_QUESTION;
string_event:
default:
/* read until end of string or word designator/modifier */
str = cp;
while(*cp)
{
cp++;
if((!(flag&HIST_QUESTION) &&
(*cp == ':' || isspace(*cp)
|| *cp == '^' || *cp == '$'
|| *cp == '*' || *cp == '-'
|| *cp == '%')
)
|| ((flag&HIST_QUESTION) && (*cp == '?' || *cp == '\n')))
{
c = *cp;
*cp = '\0';
}
}
break;
}
getline:
flag |= HIST_EVENT;
if(str) /* !string or !?string? event designator */
{
/* search history for string */
hl = hist_find(shgd->hist_ptr, str,
shgd->hist_ptr->histind,
flag&HIST_QUESTION, -1);
if((n = hl.hist_command) == -1)
n = 0; /* not found */
}
if(n)
{
if(n < 0) /* determine index for backref */
n = shgd->hist_ptr->histind + n;
/* search and use history file if found */
if(n > 0 && hist_seek(shgd->hist_ptr, n) != -1)
ref = shgd->hist_ptr->histfp;
}
if(!ref)
{
/* string not found or command # out of range */
c = *cp;
*cp = '\0';
errormsg(SH_DICT, ERROR_ERROR, "%s: event not found", evp);
*cp = c;
DONE();
}
if(str) /* string search: restore orig. line */
{
if(flag&HIST_QUESTION)
*cp++ = c; /* skip second question mark */
else
*cp = c;
}
/* colon introduces either word designators or modifiers */
if(*(evp = cp) == ':')
cp++;
w[0] = 0; /* -1 means last word, -2 means match from !?string? */
w[1] = -1; /* -1 means last word, -2 means suppress last word */
if(flag & HIST_QUICKSUBST) /* shortcut substitution */
goto getsel;
n = 0;
while(n < 2)
{
switch(c = *cp++) {
case '^': /* first word */
if(n == 0)
{
w[0] = w[1] = 1;
goto skip;
}
else
goto skip2;
case '$': /* last word */
w[n] = -1;
goto skip;
case '%': /* match from !?string? event designator */
if(n == 0)
{
if(!str)
{
w[0] = 0;
w[1] = -1;
ref = wm;
}
else
{
w[0] = -2;
w[1] = sftell(ref) + hl.hist_char;
}
sfseek(wm, 0, SEEK_SET);
goto skip;
}
default:
skip2:
cp--;
n = 2;
break;
case '*': /* until last word */
if(n == 0)
w[0] = 1;
w[1] = -1;
skip:
flag |= HIST_WORDDSGN;
n = 2;
break;
case '-': /* until last word or specified index */
w[1] = -2;
flag |= HIST_WORDDSGN;
n = 1;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': /* specify index */
if((*evp == ':') || w[1] == -2)
{
w[n] = c - '0';
while(isdigit(c=*cp++))
w[n] = w[n] * 10 + c - '0';
flag |= HIST_WORDDSGN;
if(n == 0)
w[1] = w[0];
n++;
}
else
n = 2;
cp--;
break;
}
}
if(w[0] != -2 && w[1] > 0 && w[0] > w[1])
{
c = *cp;
*cp = '\0';
errormsg(SH_DICT, ERROR_ERROR, "%s: bad word specifier", evp);
*cp = c;
DONE();
}
/* no valid word designator after colon, rewind */
if(!(flag & HIST_WORDDSGN) && (*evp == ':'))
cp = evp;
getsel:
/* open temp buffer, let sfio do the (re)allocation */
tmp = sfopen(NULL, NULL, "swr");
/* push selected words into buffer, squash
whitespace into single blank or a newline */
n = i = q = 0;
while((c = sfgetc(ref)) > 0)
{
if(isspace(c))
{
flag |= (c == '\n' ? HIST_NEWLINE : 0);
continue;
}
if(n >= w[0] && ((w[0] != -2) ? (w[1] < 0 || n <= w[1]) : 1))
{
if(w[0] < 0)
sfseek(tmp, 0, SEEK_SET);
else
i = sftell(tmp);
if(i > 0)
sfputc(tmp, flag & HIST_NEWLINE ? '\n' : ' ');
flag &= ~HIST_NEWLINE;
p = 1;
}
else
p = 0;
do
{
cc = strchr(qc, c);
q ^= cc ? 1<<(int)(cc - qc) : 0;
if(p)
sfputc(tmp, c);
}
while((c = sfgetc(ref)) > 0 && (!isspace(c) || q));
if(w[0] == -2 && sftell(ref) > w[1])
break;
flag |= (c == '\n' ? HIST_NEWLINE : 0);
n++;
}
if(w[0] != -2 && w[1] >= 0 && w[1] >= n)
{
c = *cp;
*cp = '\0';
errormsg(SH_DICT, ERROR_ERROR, "%s: bad word specifier", evp);
*cp = c;
DONE();
}
else if(w[1] == -2) /* skip last word */
sfseek(tmp, i, SEEK_SET);
/* remove trailing newline */
if(sftell(tmp))
{
sfseek(tmp, -1, SEEK_CUR);
if(sfgetc(tmp) == '\n')
sfungetc(tmp, '\n');
}
sfputc(tmp, '\0');
if(str)
{
if(wm)
sfclose(wm);
wm = tmp;
}
if(cc && (flag&HIST_HASH))
{
/* close !# temp file */
sfclose(ref);
flag &= ~HIST_HASH;
free(cc);
cc = 0;
}
evp = cp;
/* selected line/words are now in buffer, now go for the modifiers */
while(*cp == ':' || (flag & HIST_QUICKSUBST))
{
if(flag & HIST_QUICKSUBST)
{
flag &= ~HIST_QUICKSUBST;
c = 's';
cp--;
}
else
c = *++cp;
sfseek(tmp, 0, SEEK_SET);
tmp2 = sfopen(tmp2, NULL, "swr");
if(c == 'g') /* global substitution */
{
flag |= HIST_GLOBALSUBST;
c = *++cp;
}
if(cc = strchr(modifiers, c))
flag |= mod_flags[cc - modifiers];
else
{
errormsg(SH_DICT, ERROR_ERROR, "%c: unrecognized history modifier", c);
DONE();
}
if(c == 'h' || c == 'r') /* head or base */
{
n = -1;
while((c = sfgetc(tmp)) > 0)
{ /* remember position of / or . */
if((c == '/' && *cp == 'h') || (c == '.' && *cp == 'r'))
n = sftell(tmp2);
sfputc(tmp2, c);
}
if(n > 0)
{ /* rewind to last / or . */
sfseek(tmp2, n, SEEK_SET);
/* end string there */
sfputc(tmp2, '\0');
}
}
else if(c == 't' || c == 'e') /* tail or suffix */
{
n = 0;
while((c = sfgetc(tmp)) > 0)
{ /* remember position of / or . */
if((c == '/' && *cp == 't') || (c == '.' && *cp == 'e'))
n = sftell(tmp);
}
/* rewind to last / or . */
sfseek(tmp, n, SEEK_SET);
/* copy from there on */
while((c = sfgetc(tmp)) > 0)
sfputc(tmp2, c);
}
else if(c == 's' || c == '&')
{
cp++;
if(c == 's')
{
/* preset old with match from !?string? */
if(!sb.str[0] && wm)
sb.str[0] = strdup(sfsetbuf(wm, (Void_t*)1, 0));
cp = parse_subst(cp, &sb);
}
if(!sb.str[0] || !sb.str[1])
{
c = *cp;
*cp = '\0';
errormsg(SH_DICT, ERROR_ERROR,
"%s%s: no previous substitution",
(flag & HIST_QUICKSUBST) ? ":s" : "",
evp);
*cp = c;
DONE();
}
/* need pointer for strstr() */
str = sfsetbuf(tmp, (Void_t*)1, 0);
flag |= HIST_SUBSTITUTE;
while(flag & HIST_SUBSTITUTE)
{
/* find string */
if(cc = strstr(str, sb.str[0]))
{ /* replace it */
c = *cc;
*cc = '\0';
sfputr(tmp2, str, -1);
sfputr(tmp2, sb.str[1], -1);
*cc = c;
str = cc + strlen(sb.str[0]);
}
else if(!sftell(tmp2))
{ /* not successfull */
c = *cp;
*cp = '\0';
errormsg(SH_DICT, ERROR_ERROR,
"%s%s: substitution failed",
(flag & HIST_QUICKSUBST) ? ":s" : "",
evp);
*cp = c;
DONE();
}
/* loop if g modifier specified */
if(!cc || !(flag & HIST_GLOBALSUBST))
flag &= ~HIST_SUBSTITUTE;
}
/* output rest of line */
sfputr(tmp2, str, -1);
if(*cp)
cp--;
}
if(sftell(tmp2))
{ /* if any substitions done, swap buffers */
if(wm != tmp)
sfclose(tmp);
tmp = tmp2;
tmp2 = 0;
}
cc = 0;
if(*cp)
cp++;
}
/* flush temporary buffer to stack */
if(tmp)
{
sfseek(tmp, 0, SEEK_SET);
if(flag & HIST_QUOTE)
stakputc('\'');
while((c = sfgetc(tmp)) > 0)
{
if(isspace(c))
{
flag = flag & ~HIST_NEWLINE;
/* squash white space to either a
blank or a newline */
do
flag |= (c == '\n' ? HIST_NEWLINE : 0);
while((c = sfgetc(tmp)) > 0 && isspace(c));
sfungetc(tmp, c);
c = (flag & HIST_NEWLINE) ? '\n' : ' ';
if(flag & HIST_QUOTE_BR)
{
stakputc('\'');
stakputc(c);
stakputc('\'');
}
else
stakputc(c);
}
else if((c == '\'') && (flag & HIST_QUOTE))
{
stakputc('\'');
stakputc('\\');
stakputc(c);
stakputc('\'');
}
else
stakputc(c);
}
if(flag & HIST_QUOTE)
stakputc('\'');
}
}
stakputc('\0');
done:
if(cc && (flag&HIST_HASH))
{
/* close !# temp file */
sfclose(ref);
free(cc);
cc = 0;
}
/* error? */
if(staktell() && !(flag & HIST_ERROR))
*xp = strdup(stakfreeze(1));
/* restore shell stack */
if(off)
stakset(sp,off);
else
stakseek(0);
/* drop temporary files */
if(tmp && tmp != wm)
sfclose(tmp);
if(tmp2)
sfclose(tmp2);
return (flag & HIST_ERROR ? HIST_ERROR : flag & HIST_FLAG_RETURN_MASK);
}
/*
* print <str> quoting chars so that it can be read by the shell
* puts null terminated result on stack, but doesn't freeze it
* single!=0 limits quoting to '...'
* fold>0 prints raw newlines and inserts appropriately
* escaped newlines every (fold-x) chars
*/
char *sh_fmtqf(const char *string, int single, int fold)
{
register const char *cp = string;
register const char *bp;
register const char *vp;
register int c;
register int n;
register int q;
register int a;
int offset;
if (--fold < 8)
fold = 0;
if (!cp || !*cp || !single && !fold || fold && strlen(string) < fold)
return sh_fmtq(cp);
offset = staktell();
single = single ? 1 : 3;
c = mbchar(string);
a = isaletter(c) ? '=' : 0;
vp = cp + 1;
do
{
q = 0;
n = fold;
bp = cp;
while ((!n || n-- > 0) && (c = mbchar(cp)))
{
if (a && !isaname(c))
a = 0;
#if SHOPT_MULTIBYTE
if (c >= 0x200)
continue;
if (c == '\'' || !iswprint(c))
#else
if (c == '\'' || !isprint(c))
#endif /* SHOPT_MULTIBYTE */
{
q = single;
break;
}
if (c == '\n')
q = 1;
else if (c == a)
{
stakwrite(bp, cp - bp);
bp = cp;
vp = cp + 1;
a = 0;
}
else if ((c == '#' || c == '~') && cp == vp || c == ']' || c != ':' && (c = sh_lexstates[ST_NORM][c]) && c != S_EPAT)
q = 1;
}
if (q & 2)
{
stakputc('$');
stakputc('\'');
cp = bp;
n = fold - 3;
q = 1;
while (c = mbchar(cp))
{
switch (c)
{
case ('a'==97?'\033':39):
c = 'E';
break;
case '\n':
q = 0;
n = fold - 1;
break;
case '\r':
c = 'r';
break;
case '\t':
c = 't';
break;
case '\f':
c = 'f';
break;
case '\b':
c = 'b';
break;
case '\a':
c = 'a';
break;
case '\\':
if (*cp == 'n')
{
c = '\n';
q = 0;
n = fold - 1;
break;
}
case '\'':
break;
default:
#if SHOPT_MULTIBYTE
if(!iswprint(c))
#else
if(!isprint(c))
#endif
{
if ((n -= 4) <= 0)
{
stakwrite("'\\\n$'", 5);
n = fold - 7;
}
sfprintf(staksp, "\\%03o", c);
continue;
}
q = 0;
break;
}
if ((n -= q + 1) <= 0)
{
if (!q)
{
stakputc('\'');
cp = bp;
break;
}
stakwrite("'\\\n$'", 5);
n = fold - 5;
}
if (q)
stakputc('\\');
else
q = 1;
stakputc(c);
bp = cp;
}
if (!c)
stakputc('\'');
}
else if (q & 1)
{
stakputc('\'');
cp = bp;
n = fold ? (fold - 2) : 0;
while (c = mbchar(cp))
{
if (c == '\n')
n = fold - 1;
else if (n && --n <= 0)
{
n = fold - 2;
stakwrite(bp, --cp - bp);
bp = cp;
stakwrite("'\\\n'", 4);
}
else if (n == 1 && *cp == '\'')
{
n = fold - 5;
stakwrite(bp, --cp - bp);
bp = cp;
stakwrite("'\\\n\\''", 6);
}
else if (c == '\'')
{
stakwrite(bp, cp - bp - 1);
bp = cp;
if (n && (n -= 4) <= 0)
{
n = fold - 5;
stakwrite("'\\\n\\''", 6);
}
else
stakwrite("'\\''", 4);
}
}
stakwrite(bp, cp - bp - 1);
stakputc('\'');
}
else if (n = fold)
{
cp = bp;
while (c = mbchar(cp))
{
if (--n <= 0)
{
n = fold;
stakwrite(bp, --cp - bp);
bp = cp;
stakwrite("\\\n", 2);
}
}
stakwrite(bp, cp - bp - 1);
}
else
stakwrite(bp, cp - bp);
if (c)
{
stakputc('\\');
stakputc('\n');
}
} while (c);
stakputc(0);
return(stakptr(offset));
}
/*
* print <str> quoting chars so that it can be read by the shell
* puts null terminated result on stack, but doesn't freeze it
*/
char *sh_fmtq(const char *string)
{
register const char *cp = string, *op;
register int c, state;
int offset;
if(!cp)
return((char*)0);
offset = staktell();
#if SHOPT_MULTIBYTE
state = ((c= mbchar(cp))==0);
#else
state = ((c= *(unsigned char*)cp++)==0);
#endif
if(isaletter(c))
{
#if SHOPT_MULTIBYTE
while((c=mbchar(cp)),isaname(c));
#else
while((c = *(unsigned char*)cp++),isaname(c));
#endif
if(c==0)
return((char*)string);
if(c=='=')
{
if(*cp==0)
return((char*)string);
c = cp - string;
stakwrite(string,c);
string = cp;
#if SHOPT_MULTIBYTE
c = mbchar(cp);
#else
c = *(unsigned char*)cp++;
#endif
}
}
if(c==0 || c=='#' || c=='~')
state = 1;
#if SHOPT_MULTIBYTE
for(;c;c= mbchar(cp))
#else
for(;c; c= *(unsigned char*)cp++)
#endif
{
#if SHOPT_MULTIBYTE
if(c=='\'' || !iswprint(c))
#else
if(c=='\'' || !isprint(c))
#endif /* SHOPT_MULTIBYTE */
state = 2;
else if(c==']' || (c!=':' && c<=0xff && (c=sh_lexstates[ST_NORM][c]) && c!=S_EPAT))
state |=1;
}
if(state<2)
{
if(state==1)
stakputc('\'');
if(c = --cp - string)
stakwrite(string,c);
if(state==1)
stakputc('\'');
}
else
{
stakwrite("$'",2);
cp = string;
#if SHOPT_MULTIBYTE
while(op = cp, c= mbchar(cp))
#else
while(op = cp, c= *(unsigned char*)cp++)
#endif
{
state=1;
switch(c)
{
case ('a'==97?'\033':39):
c = 'E';
break;
case '\n':
c = 'n';
break;
case '\r':
c = 'r';
break;
case '\t':
c = 't';
break;
case '\f':
c = 'f';
break;
case '\b':
c = 'b';
break;
case '\a':
c = 'a';
break;
case '\\': case '\'':
break;
default:
#if SHOPT_MULTIBYTE
if(!iswprint(c))
{
while(op<cp)
sfprintf(staksp,"\\%.3o",*(unsigned char*)op++);
continue;
}
#else
if(!isprint(c))
{
sfprintf(staksp,"\\%.3o",c);
continue;
}
#endif
state=0;
break;
}
if(state)
{
stakputc('\\');
stakputc(c);
}
else
stakwrite(op, cp-op);
}
stakputc('\'');
}
stakputc(0);
return(stakptr(offset));
}
