/*
* Karl Kleinpaste, 18 Jan 1984.
* Added period_cmd(), which executes the alias "periodic" every
* $tperiod minutes. Useful for occasional checking of msgs and such.
*/
void
period_cmd(void)
{
Char *vp;
time_t t, interval;
pintr_disabled++;
cleanup_push(&pintr_disabled, disabled_cleanup);
if (periodic_active) { /* an error must have been caught */
aliasrun(2, STRunalias, STRperiodic);
xprintf("%s", CGETS(22, 6, "Faulty alias 'periodic' removed.\n"));
goto leave;
}
periodic_active = 1;
if (!whyles && adrof1(STRperiodic, &aliases)) {
vp = varval(STRtperiod);
if (vp == STRNULL) {
aliasrun(1, STRperiodic, NULL);
goto leave;
}
interval = getn(vp);
(void) time(&t);
if (t - t_period >= interval * 60) {
t_period = t;
aliasrun(1, STRperiodic, NULL);
}
}
leave:
periodic_active = 0;
cleanup_until(&pintr_disabled);
}
/* The dowhich() is by:
* Andreas Luik <*****@*****.**>
* I S A GmbH - Informationssysteme fuer computerintegrierte Automatisierung
* Azenberstr. 35
* D-7000 Stuttgart 1
* West-Germany
* Thanks!!
*/
int
cmd_expand(Char *cmd, Char **str)
{
struct wordent lexp[3];
struct varent *vp;
int rv = TRUE;
lexp[0].next = &lexp[1];
lexp[1].next = &lexp[2];
lexp[2].next = &lexp[0];
lexp[0].prev = &lexp[2];
lexp[1].prev = &lexp[0];
lexp[2].prev = &lexp[1];
lexp[0].word = STRNULL;
lexp[2].word = STRret;
if ((vp = adrof1(cmd, &aliases)) != NULL && vp->vec != NULL) {
if (str == NULL) {
xprintf(CGETS(22, 1, "%S: \t aliased to "), cmd);
blkpr(vp->vec);
xputchar('\n');
}
else
*str = blkexpand(vp->vec);
}
else {
lexp[1].word = cmd;
rv = tellmewhat(lexp, str);
}
return rv;
}
/*ARGSUSED*/
void
dowhich(Char **v, struct command *c)
{
struct wordent lexw[3];
struct varent *vp;
lexw[0].next = &lexw[1];
lexw[1].next = &lexw[2];
lexw[2].next = &lexw[0];
lexw[0].prev = &lexw[2];
lexw[1].prev = &lexw[0];
lexw[2].prev = &lexw[1];
lexw[0].word = STRNULL;
lexw[2].word = STRret;
while (*++v) {
if ((vp = adrof1(*v, &aliases)) != NULL) {
(void)fprintf(cshout, "%s: \t aliased to ", vis_str(*v));
blkpr(cshout, vp->vec);
(void)fputc('\n', cshout);
set(STRstatus, Strsave(STR0));
}
else {
lexw[1].word = *v;
set(STRstatus, Strsave(tellmewhat(lexw, NULL) ? STR0 : STR1));
}
}
}
/*ARGSUSED*/
void
docomplete(Char **v, struct command *t)
{
struct varent *vp;
Char *p;
Char **pp;
USE(t);
v++;
p = *v++;
if (p == 0)
tw_prlist(&completions);
else if (*v == 0) {
vp = adrof1(strip(p), &completions);
if (vp && vp->vec)
tw_pr(vp->vec), xputchar('\n');
else
{
#ifdef TDEBUG
xprintf("tw_find(%s) \n", short2str(strip(p)));
#endif /* TDEBUG */
pp = tw_find(strip(p), &completions, FALSE);
if (pp)
tw_pr(pp), xputchar('\n');
}
}
else
set1(strip(p), saveblk(v), &completions, VAR_READWRITE);
} /* end docomplete */
Char *
value1(Char *var, struct varent *head)
{
struct varent *vp;
vp = adrof1(var, head);
return (vp == 0 || vp->vec[0] == 0 ? STRNULL : vp->vec[0]);
}
void
unsetv(Char *var)
{
struct varent *vp;
if ((vp = adrof1(var, &shvhed)) == 0)
udvar(var);
unsetv1(vp);
}
Char *
value1(Char *var, struct varent *head)
{
struct varent *vp;
if (!var || !head) /* PWP: extra error checking */
return (STRNULL);
vp = adrof1(var, head);
return ((vp == NULL || vp->vec == NULL || vp->vec[0] == NULL) ?
STRNULL : vp->vec[0]);
}
static void
asyn3(struct wordent *p1, struct wordent *p2)
{
struct varent *ap;
struct wordent alout;
int redid;
if (p1 == p2)
return;
if (p1->word[0] == '(') {
for (p2 = p2->prev; p2->word[0] != ')'; p2 = p2->prev)
if (p2 == p1)
return;
if (p2 == p1->next)
return;
asyn0(p1->next, p2);
return;
}
ap = adrof1(p1->word, &aliases);
if (ap == 0)
return;
alhistp = p1->prev;
alhistt = p2;
alvec = ap->vec;
redid = lex(&alout);
alhistp = alhistt = 0;
alvec = 0;
if (seterr) {
freelex(&alout);
stderror(ERR_OLD);
}
if (p1->word[0] && eq(p1->word, alout.next->word)) {
Char *cp;
cp = alout.next->word;
alout.next->word = Strspl(STRQNULL, cp);
xfree((ptr_t) cp);
}
p1 = freenod(p1, redid ? p2 : p1->next);
if (alout.next != &alout) {
p1->next->prev = alout.prev->prev;
alout.prev->prev->next = p1->next;
alout.next->prev = p1;
p1->next = alout.next;
xfree((ptr_t)alout.prev->word);
xfree((ptr_t)(alout.prev));
}
reset(); /* throw! */
}
/*
* Joachim Hoenig 07/16/91 Added beep_cmd, run every time tcsh wishes
* to beep the terminal bell. Useful for playing nice sounds instead.
*/
void
beep_cmd(void)
{
pintr_disabled++;
cleanup_push(&pintr_disabled, disabled_cleanup);
if (beepcmd_active) { /* an error must have been caught */
aliasrun(2, STRunalias, STRbeepcmd);
xprintf("%s", CGETS(22, 5, "Faulty alias 'beepcmd' removed.\n"));
}
else {
beepcmd_active = 1;
if (!whyles && adrof1(STRbeepcmd, &aliases))
aliasrun(1, STRbeepcmd, NULL);
}
beepcmd_active = 0;
cleanup_until(&pintr_disabled);
}
/*
* Paul Placeway 11/24/87 Added cwd_cmd by hacking precmd() into
* submission... Run every time $cwd is set (after it is set). Useful
* for putting your machine and cwd (or anything else) in an xterm title
* space.
*/
void
cwd_cmd(void)
{
pintr_disabled++;
cleanup_push(&pintr_disabled, disabled_cleanup);
if (cwdcmd_active) { /* an error must have been caught */
aliasrun(2, STRunalias, STRcwdcmd);
xprintf("%s", CGETS(22, 4, "Faulty alias 'cwdcmd' removed.\n"));
goto leave;
}
cwdcmd_active = 1;
if (!whyles && adrof1(STRcwdcmd, &aliases))
aliasrun(1, STRcwdcmd, NULL);
leave:
cwdcmd_active = 0;
cleanup_until(&pintr_disabled);
}
/*
* GrP Greg Parker May 2001
* Added job_cmd(), which is run every time a job is started or
* foregrounded. The command is passed a single argument, the string
* used to start the job originally. With precmd, useful for setting
* xterm titles.
* Cloned from cwd_cmd().
*/
void
job_cmd(Char *args)
{
pintr_disabled++;
cleanup_push(&pintr_disabled, disabled_cleanup);
if (jobcmd_active) { /* an error must have been caught */
aliasrun(2, STRunalias, STRjobcmd);
xprintf("%s", CGETS(22, 14, "Faulty alias 'jobcmd' removed.\n"));
goto leave;
}
jobcmd_active = 1;
if (!whyles && adrof1(STRjobcmd, &aliases)) {
struct process *pp = pcurrjob; /* put things back after the hook */
aliasrun(2, STRjobcmd, args);
pcurrjob = pp;
}
leave:
jobcmd_active = 0;
cleanup_until(&pintr_disabled);
}
static int
tellmewhat(struct wordent *lexp, Char *str)
{
struct biltins *bptr;
struct wordent *sp;
Char *cmd, *s0, *s1, *s2;
int i;
int aliased, found;
Char qc;
aliased = 0;
sp = lexp->next;
if (adrof1(sp->word, &aliases)) {
alias(lexp);
sp = lexp->next;
aliased = 1;
}
s0 = sp->word; /* to get the memory freeing right... */
/* handle quoted alias hack */
if ((*(sp->word) & (QUOTE | TRIM)) == QUOTE)
(sp->word)++;
/* do quoting, if it hasn't been done */
s1 = s2 = sp->word;
while (*s2)
switch (*s2) {
case '\'':
case '"':
qc = *s2++;
while (*s2 && *s2 != qc)
*s1++ = (Char)(*s2++ | QUOTE);
if (*s2)
s2++;
break;
case '\\':
if (*++s2)
*s1++ = (Char)(*s2++ | QUOTE);
break;
default:
*s1++ = *s2++;
}
*s1 = '\0';
for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) {
if (eq(sp->word, str2short(bptr->bname))) {
if (str == NULL) {
if (aliased)
prlex(cshout, lexp);
(void)fprintf(cshout, "%s: shell built-in command.\n",
vis_str(sp->word));
}
else
(void)Strcpy(str, sp->word);
sp->word = s0; /* we save and then restore this */
return 1;
}
}
sp->word = cmd = globone(sp->word, G_IGNORE);
if ((i = iscommand(sp->word)) != 0) {
Char **pv;
struct varent *v;
int slash = any(short2str(sp->word), '/');
v = adrof(STRpath);
if (v == 0 || v->vec[0] == 0 || slash)
pv = justabs;
else
pv = v->vec;
while (--i)
pv++;
if (pv[0][0] == 0 || eq(pv[0], STRdot)) {
if (!slash) {
sp->word = Strspl(STRdotsl, sp->word);
prlex(cshout, lexp);
free(sp->word);
}
else
prlex(cshout, lexp);
}
else {
s1 = Strspl(*pv, STRslash);
sp->word = Strspl(s1, sp->word);
free(s1);
if (str == NULL)
prlex(cshout, lexp);
else
(void)Strcpy(str, sp->word);
free(sp->word);
}
found = 1;
}
else {
if (str == NULL) {
if (aliased)
prlex(cshout, lexp);
(void)fprintf(csherr,
"%s: Command not found.\n", vis_str(sp->word));
}
else
(void)Strcpy(str, sp->word);
found = 0;
}
sp->word = s0; /* we save and then restore this */
free(cmd);
return found;
}
/*
* Execute command f, arg list t.
* Record error message if not found.
* Also do shell scripts here.
*/
static void
texec(Char *sf, Char **st)
{
struct varent *v;
Char *lastsh[2], **vp, *st0, **ost;
char *f, **t;
int fd;
unsigned char c = '\0';
/* The order for the conversions is significant */
t = short2blk(st);
f = short2str(sf);
Vt = t;
errno = 0; /* don't use a previous error */
(void)execve(f, t, environ);
Vt = 0;
blkfree((Char **)t);
switch (errno) {
case ENOEXEC:
/*
* From: [email protected] (Casper H.S. Dik) If we could not execute
* it, don't feed it to the shell if it looks like a binary!
*/
if ((fd = open(f, O_RDONLY)) != -1) {
if (read(fd, (char *)&c, 1) == 1) {
if (!Isprint(c) && (c != '\n' && c != '\t')) {
(void)close(fd);
/*
* We *know* what ENOEXEC means.
*/
stderror(ERR_ARCH, f, strerror(errno));
}
}
#ifdef _PATH_BSHELL
else
c = '#';
#endif
(void)close(fd);
}
/*
* If there is an alias for shell, then put the words of the alias in
* front of the argument list replacing the command name. Note no
* interpretation of the words at this point.
*/
v = adrof1(STRshell, &aliases);
if (v == 0) {
vp = lastsh;
vp[0] = adrof(STRshell) ? value(STRshell) : STR_SHELLPATH;
vp[1] = NULL;
#ifdef _PATH_BSHELL
if (fd != -1 && c != '#')
vp[0] = STR_BSHELL;
#endif
}
else
vp = v->vec;
st0 = st[0];
st[0] = sf;
ost = st;
st = blkspl(vp, st); /* Splice up the new arglst */
ost[0] = st0;
sf = *st;
/* The order for the conversions is significant */
t = short2blk(st);
f = short2str(sf);
free(st);
Vt = t;
(void)execve(f, t, environ);
Vt = 0;
blkfree((Char **)t);
/* FALLTHROUGH */
case ENOMEM:
stderror(ERR_SYSTEM, f, strerror(errno));
/* NOTREACHED */
case ENOENT:
break;
default:
if (exerr == 0) {
exerr = strerror(errno);
if (expath)
free(expath);
expath = Strsave(sf);
Vexpath = expath;
}
}
}
/*
* Execute command f, arg list t.
* Record error message if not found.
* Also do shell scripts here.
*/
void
texec(struct command *cmd, tchar *f, tchar **t)
{
int pfstatus = 0;
struct varent *v;
tchar **vp;
tchar *lastsh[2];
#ifdef TRACE
tprintf("TRACE- texec()\n");
#endif
/* convert cfname and cargs from tchar to char */
tconvert(cmd, f, t);
if (pfcshflag == 1) {
pfstatus = secpolicy_pfexec((const char *)(cmd->cfname),
cmd->cargs, (const char **)NULL);
if (pfstatus != NOATTRS) {
errno = pfstatus;
}
}
if ((pfcshflag == 0) || (pfstatus == NOATTRS)) {
execv(cmd->cfname, cmd->cargs);
}
/*
* exec returned, free up allocations from above
* tconvert(), zero cfname and cargs to prevent
* duplicate free() in freesyn()
*/
xfree(cmd->cfname);
chr_blkfree(cmd->cargs);
cmd->cfname = (char *)0;
cmd->cargs = (char **)0;
switch (errno) {
case ENOEXEC:
/* check that this is not a binary file */
{
int ff = open_(f, 0);
tchar ch[MB_LEN_MAX];
if (ff != -1 && read_(ff, ch, 1) == 1 &&
!isprint(ch[0]) && !isspace(ch[0])) {
printf("Cannot execute binary file.\n");
Perror(f);
(void) close(ff);
unsetfd(ff);
return;
}
(void) close(ff);
unsetfd(ff);
}
/*
* If there is an alias for shell, then
* put the words of the alias in front of the
* argument list replacing the command name.
* Note no interpretation of the words at this point.
*/
v = adrof1(S_shell /* "shell" */, &aliases);
if (v == 0) {
#ifdef OTHERSH
int ff = open_(f, 0);
tchar ch[MB_LEN_MAX];
#endif
vp = lastsh;
vp[0] = adrof(S_shell /* "shell" */) ? value(S_shell /* "shell" */) : S_SHELLPATH /* SHELLPATH */;
vp[1] = (tchar *) NULL;
#ifdef OTHERSH
if (ff != -1 && read_(ff, ch, 1) == 1 && ch[0] != '#')
vp[0] = S_OTHERSH /* OTHERSH */;
(void) close(ff);
unsetfd(ff);
#endif
} else
vp = v->vec;
t[0] = f;
t = blkspl(vp, t); /* Splice up the new arglst */
f = *t;
tconvert(cmd, f, t); /* convert tchar to char */
/*
* now done with tchar arg list t,
* free the space calloc'd by above blkspl()
*/
xfree((char *)t);
execv(cmd->cfname, cmd->cargs); /* exec the command */
/* exec returned, same free'ing as above */
xfree(cmd->cfname);
chr_blkfree(cmd->cargs);
cmd->cfname = (char *)0;
cmd->cargs = (char **)0;
/* The sky is falling, the sky is falling! */
case ENOMEM:
Perror(f);
case ENOENT:
break;
default:
if (exerr == 0) {
exerr = strerror(errno);
setname(f);
}
}
}
