/*
* ex_exec_proc --
* Run a separate process.
*
* PUBLIC: int ex_exec_proc __P((SCR *, EXCMD *, const char *, const char *, int));
*/
int
ex_exec_proc(SCR *sp, EXCMD *cmdp, const char *cmd, const char *msg, int need_newline)
{
GS *gp;
const char *name;
pid_t pid;
gp = sp->gp;
/* We'll need a shell. */
if (opts_empty(sp, O_SHELL, 0))
return (1);
/* Enter ex mode. */
if (F_ISSET(sp, SC_VI)) {
if (gp->scr_screen(sp, SC_EX)) {
ex_wemsg(sp, cmdp->cmd->name, EXM_NOCANON);
return (1);
}
(void)gp->scr_attr(sp, SA_ALTERNATE, 0);
F_SET(sp, SC_SCR_EX | SC_SCR_EXWROTE);
}
/* Put out additional newline, message. */
if (need_newline)
(void)ex_puts(sp, "\n");
if (msg != NULL) {
(void)ex_puts(sp, msg);
(void)ex_puts(sp, "\n");
}
(void)ex_fflush(sp);
switch (pid = vfork()) {
case -1: /* Error. */
msgq(sp, M_SYSERR, "vfork");
return (1);
case 0: /* Utility. */
if (gp->scr_child)
gp->scr_child(sp);
if ((name = strrchr(O_STR(sp, O_SHELL), '/')) == NULL)
name = O_STR(sp, O_SHELL);
else
++name;
execl(O_STR(sp, O_SHELL), name, "-c", cmd, (char *)NULL);
msgq_str(sp, M_SYSERR, O_STR(sp, O_SHELL), "execl: %s");
_exit(127);
/* NOTREACHED */
default: /* Parent. */
return (proc_wait(sp, (long)pid, cmd, 0, 0));
}
/* NOTREACHED */
}
/*
* ex_init --
* Init the screen for ex.
*
* PUBLIC: int ex_init __P((SCR *));
*/
int
ex_init(SCR *sp)
{
GS *gp;
gp = sp->gp;
if (gp->scr_screen(sp, SC_EX))
return (1);
(void)gp->scr_attr(sp, SA_ALTERNATE, 0);
sp->rows = O_VAL(sp, O_LINES);
sp->cols = O_VAL(sp, O_COLUMNS);
F_CLR(sp, SC_VI);
F_SET(sp, SC_EX | SC_SCR_EX);
return (0);
}
/*
* ex_read -- :read [file]
* :read [!cmd]
* Read from a file or utility.
*
* !!!
* Historical vi wouldn't undo a filter read, for no apparent reason.
*
* PUBLIC: int ex_read __P((SCR *, EXCMD *));
*/
int
ex_read(SCR *sp, EXCMD *cmdp)
{
enum { R_ARG, R_EXPANDARG, R_FILTER } which;
struct stat sb;
CHAR_T *arg;
char *name;
size_t nlen;
EX_PRIVATE *exp;
FILE *fp;
FREF *frp;
GS *gp;
MARK rm;
db_recno_t nlines;
size_t arglen;
int argc, rval;
char *p;
char *np;
gp = sp->gp;
/*
* 0 args: read the current pathname.
* 1 args: check for "read !arg".
*/
switch (cmdp->argc) {
case 0:
which = R_ARG;
break;
case 1:
arg = cmdp->argv[0]->bp;
arglen = cmdp->argv[0]->len;
if (*arg == '!') {
++arg;
--arglen;
which = R_FILTER;
/* Secure means no shell access. */
if (O_ISSET(sp, O_SECURE)) {
ex_wemsg(sp, cmdp->cmd->name, EXM_SECURE_F);
return (1);
}
} else
which = R_EXPANDARG;
break;
default:
abort();
/* NOTREACHED */
}
/* Load a temporary file if no file being edited. */
if (sp->ep == NULL) {
if ((frp = file_add(sp, NULL)) == NULL)
return (1);
if (file_init(sp, frp, NULL, 0))
return (1);
}
switch (which) {
case R_FILTER:
/*
* File name and bang expand the user's argument. If
* we don't get an additional argument, it's illegal.
*/
argc = cmdp->argc;
if (argv_exp1(sp, cmdp, arg, arglen, 1))
return (1);
if (argc == cmdp->argc) {
ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
return (1);
}
argc = cmdp->argc - 1;
/* Set the last bang command. */
exp = EXP(sp);
if (exp->lastbcomm != NULL)
free(exp->lastbcomm);
if ((exp->lastbcomm =
v_wstrdup(sp, cmdp->argv[argc]->bp,
cmdp->argv[argc]->len)) == NULL) {
msgq(sp, M_SYSERR, NULL);
return (1);
}
/*
* Vi redisplayed the user's argument if it changed, ex
* always displayed a !, plus the user's argument if it
* changed.
*/
if (F_ISSET(sp, SC_VI)) {
if (F_ISSET(cmdp, E_MODIFY))
(void)vs_update(sp, "!", cmdp->argv[argc]->bp);
} else {
if (F_ISSET(cmdp, E_MODIFY))
(void)ex_printf(sp,
"!%s\n", cmdp->argv[argc]->bp);
else
(void)ex_puts(sp, "!\n");
(void)ex_fflush(sp);
}
/*
* Historically, filter reads as the first ex command didn't
* wait for the user. If SC_SCR_EXWROTE not already set, set
* the don't-wait flag.
*/
if (!F_ISSET(sp, SC_SCR_EXWROTE))
F_SET(sp, SC_EX_WAIT_NO);
/*
* Switch into ex canonical mode. The reason to restore the
* original terminal modes for read filters is so that users
* can do things like ":r! cat /dev/tty".
*
* !!!
* We do not output an extra <newline>, so that we don't touch
* the screen on a normal read.
*/
if (F_ISSET(sp, SC_VI)) {
if (gp->scr_screen(sp, SC_EX)) {
ex_wemsg(sp, cmdp->cmd->name, EXM_NOCANON_F);
return (1);
}
/*
* !!!
* Historically, the read command doesn't switch to
* the alternate X11 xterm screen, if doing a filter
* read -- don't set SA_ALTERNATE.
*/
F_SET(sp, SC_SCR_EX | SC_SCR_EXWROTE);
}
if (ex_filter(sp, cmdp, &cmdp->addr1,
NULL, &rm, cmdp->argv[argc]->bp, FILTER_READ))
return (1);
/* The filter version of read set the autoprint flag. */
F_SET(cmdp, E_AUTOPRINT);
/*
* If in vi mode, move to the first nonblank. Might have
* switched into ex mode, so saved the original SC_VI value.
*/
sp->lno = rm.lno;
if (F_ISSET(sp, SC_VI)) {
sp->cno = 0;
(void)nonblank(sp, sp->lno, &sp->cno);
}
return (0);
case R_ARG:
name = sp->frp->name;
break;
case R_EXPANDARG:
if (argv_exp2(sp, cmdp, arg, arglen))
return (1);
/*
* 0 args: impossible.
* 1 args: impossible (I hope).
* 2 args: read it.
* >2 args: object, too many args.
*
* The 1 args case depends on the argv_sexp() function refusing
* to return success without at least one non-blank character.
*/
switch (cmdp->argc) {
case 0:
case 1:
abort();
/* NOTREACHED */
case 2:
INT2CHAR(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len + 1,
name, nlen);
/*
* !!!
* Historically, the read and write commands renamed
* "unnamed" files, or, if the file had a name, set
* the alternate file name.
*/
if (F_ISSET(sp->frp, FR_TMPFILE) &&
!F_ISSET(sp->frp, FR_EXNAMED)) {
if ((p = strdup(name)) != NULL) {
free(sp->frp->name);
sp->frp->name = p;
}
/*
* The file has a real name, it's no longer a
* temporary, clear the temporary file flags.
*/
F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE);
F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED);
/* Notify the screen. */
(void)sp->gp->scr_rename(sp, sp->frp->name, 1);
name = sp->frp->name;
} else {
set_alt_name(sp, name);
name = sp->alt_name;
}
break;
default:
ex_wemsg(sp, cmdp->argv[0]->bp, EXM_FILECOUNT);
return (1);
}
break;
}
/*
* !!!
* Historically, vi did not permit reads from non-regular files, nor
* did it distinguish between "read !" and "read!", so there was no
* way to "force" it. We permit reading from named pipes too, since
* they didn't exist when the original implementation of vi was done
* and they seem a reasonable addition.
*/
if ((fp = fopen(name, "r")) == NULL || fstat(fileno(fp), &sb)) {
msgq_str(sp, M_SYSERR, name, "%s");
return (1);
}
if (!S_ISFIFO(sb.st_mode) && !S_ISREG(sb.st_mode)) {
(void)fclose(fp);
msgq(sp, M_ERR,
"145|Only regular files and named pipes may be read");
return (1);
}
/* Try and get a lock. */
if (file_lock(sp, NULL, NULL, fileno(fp), 0) == LOCK_UNAVAIL)
msgq(sp, M_ERR, "146|%s: read lock was unavailable", name);
rval = ex_readfp(sp, name, fp, &cmdp->addr1, &nlines, 0);
/*
* In vi, set the cursor to the first line read in, if anything read
* in, otherwise, the address. (Historic vi set it to the line after
* the address regardless, but since that line may not exist we don't
* bother.)
*
* In ex, set the cursor to the last line read in, if anything read in,
* otherwise, the address.
*/
if (F_ISSET(sp, SC_VI)) {
sp->lno = cmdp->addr1.lno;
if (nlines)
++sp->lno;
} else
sp->lno = cmdp->addr1.lno + nlines;
return (rval);
}
/*
* ex_aci --
* Append, change, insert in ex.
*/
static int
ex_aci(SCR *sp, EXCMD *cmdp, enum which cmd)
{
CHAR_T *p, *t;
GS *gp;
TEXT *tp;
TEXTH tiq;
db_recno_t cnt, lno;
size_t len;
u_int32_t flags;
int need_newline;
gp = sp->gp;
NEEDFILE(sp, cmdp);
/*
* If doing a change, replace lines for as long as possible. Then,
* append more lines or delete remaining lines. Changes to an empty
* file are appends, inserts are the same as appends to the previous
* line.
*
* !!!
* Set the address to which we'll append. We set sp->lno to this
* address as well so that autoindent works correctly when get text
* from the user.
*/
lno = cmdp->addr1.lno;
sp->lno = lno;
if ((cmd == CHANGE || cmd == INSERT) && lno != 0)
--lno;
/*
* !!!
* If the file isn't empty, cut changes into the unnamed buffer.
*/
if (cmd == CHANGE && cmdp->addr1.lno != 0 &&
(cut(sp, NULL, &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE) ||
del(sp, &cmdp->addr1, &cmdp->addr2, 1)))
return (1);
/*
* !!!
* Anything that was left after the command separator becomes part
* of the inserted text. Apparently, it was common usage to enter:
*
* :g/pattern/append|stuff1
*
* and append the line of text "stuff1" to the lines containing the
* pattern. It was also historically legal to enter:
*
* :append|stuff1
* stuff2
* .
*
* and the text on the ex command line would be appended as well as
* the text inserted after it. There was an historic bug however,
* that the user had to enter *two* terminating lines (the '.' lines)
* to terminate text input mode, in this case. This whole thing
* could be taken too far, however. Entering:
*
* :append|stuff1\
* stuff2
* stuff3
* .
*
* i.e. mixing and matching the forms confused the historic vi, and,
* not only did it take two terminating lines to terminate text input
* mode, but the trailing backslashes were retained on the input. We
* match historic practice except that we discard the backslashes.
*
* Input lines specified on the ex command line lines are separated by
* <newline>s. If there is a trailing delimiter an empty line was
* inserted. There may also be a leading delimiter, which is ignored
* unless it's also a trailing delimiter. It is possible to encounter
* a termination line, i.e. a single '.', in a global command, but not
* necessary if the text insert command was the last of the global
* commands.
*/
if (cmdp->save_cmdlen != 0) {
for (p = cmdp->save_cmd,
len = cmdp->save_cmdlen; len > 0; p = t) {
for (t = p; len > 0 && t[0] != '\n'; ++t, --len);
if (t != p || len == 0) {
if (F_ISSET(sp, SC_EX_GLOBAL) &&
t - p == 1 && p[0] == '.') {
++t;
if (len > 0)
--len;
break;
}
if (db_append(sp, 1, lno++, p, t - p))
return (1);
}
if (len != 0) {
++t;
if (--len == 0 &&
db_append(sp, 1, lno++, NULL, 0))
return (1);
}
}
/*
* If there's any remaining text, we're in a global, and
* there's more command to parse.
*
* !!!
* We depend on the fact that non-global commands will eat the
* rest of the command line as text input, and before getting
* any text input from the user. Otherwise, we'd have to save
* off the command text before or during the call to the text
* input function below.
*/
if (len != 0)
cmdp->save_cmd = t;
cmdp->save_cmdlen = len;
}
if (F_ISSET(sp, SC_EX_GLOBAL)) {
if ((sp->lno = lno) == 0 && db_exist(sp, 1))
sp->lno = 1;
return (0);
}
/*
* If not in a global command, read from the terminal.
*
* If this code is called by vi, we want to reset the terminal and use
* ex's line get routine. It actually works fine if we use vi's get
* routine, but it doesn't look as nice. Maybe if we had a separate
* window or something, but getting a line at a time looks awkward.
* However, depending on the screen that we're using, that may not
* be possible.
*/
if (F_ISSET(sp, SC_VI)) {
if (gp->scr_screen(sp, SC_EX)) {
ex_wemsg(sp, cmdp->cmd->name, EXM_NOCANON);
return (1);
}
/* If we're still in the vi screen, move out explicitly. */
need_newline = !F_ISSET(sp, SC_SCR_EXWROTE);
F_SET(sp, SC_SCR_EX | SC_SCR_EXWROTE);
if (need_newline)
(void)ex_puts(sp, "\n");
/*
* !!!
* Users of historical versions of vi sometimes get confused
* when they enter append mode, and can't seem to get out of
* it. Give them an informational message.
*/
(void)ex_puts(sp,
msg_cat(sp, "273|Entering ex input mode.", NULL));
(void)ex_puts(sp, "\n");
(void)ex_fflush(sp);
}
/*
* Set input flags; the ! flag turns off autoindent for append,
* change and insert.
*/
LF_INIT(TXT_DOTTERM | TXT_NUMBER);
if (!FL_ISSET(cmdp->iflags, E_C_FORCE) && O_ISSET(sp, O_AUTOINDENT))
LF_SET(TXT_AUTOINDENT);
if (O_ISSET(sp, O_BEAUTIFY))
LF_SET(TXT_BEAUTIFY);
/*
* This code can't use the common screen TEXTH structure (sp->tiq),
* as it may already be in use, e.g. ":append|s/abc/ABC/" would fail
* as we are only halfway through the text when the append code fires.
* Use a local structure instead. (The ex code would have to use a
* local structure except that we're guaranteed to finish remaining
* characters in the common TEXTH structure when they were inserted
* into the file, above.)
*/
memset(&tiq, 0, sizeof(TEXTH));
TAILQ_INIT(&tiq);
if (ex_txt(sp, &tiq, 0, flags))
return (1);
for (cnt = 0, tp = TAILQ_FIRST(&tiq); tp != NULL;
++cnt, tp = TAILQ_NEXT(tp, q))
if (db_append(sp, 1, lno++, tp->lb, tp->len))
return (1);
/*
* Set sp->lno to the final line number value (correcting for a
* possible 0 value) as that's historically correct for the final
* line value, whether or not the user entered any text.
*/
if ((sp->lno = lno) == 0 && db_exist(sp, 1))
sp->lno = 1;
return (0);
}
/*
* v_init --
* Initialize the vi screen.
*/
static int
v_init(SCR *sp)
{
GS *gp;
VI_PRIVATE *vip;
gp = sp->gp;
vip = VIP(sp);
/* Switch into vi. */
if (gp->scr_screen(sp, SC_VI))
return (1);
(void)gp->scr_attr(sp, SA_ALTERNATE, 1);
F_CLR(sp, SC_EX | SC_SCR_EX);
F_SET(sp, SC_VI);
/*
* Initialize screen values.
*
* Small windows: see vs_refresh(), section 6a.
*
* Setup:
* t_minrows is the minimum rows to display
* t_maxrows is the maximum rows to display (rows - 1)
* t_rows is the rows currently being displayed
*/
sp->rows = vip->srows = O_VAL(sp, O_LINES);
sp->cols = O_VAL(sp, O_COLUMNS);
sp->t_rows = sp->t_minrows = O_VAL(sp, O_WINDOW);
if (sp->rows != 1) {
if (sp->t_rows > sp->rows - 1) {
sp->t_minrows = sp->t_rows = sp->rows - 1;
msgq(sp, M_INFO,
"214|Windows option value is too large, max is %u",
(u_int)sp->t_rows);
}
sp->t_maxrows = sp->rows - 1;
} else
sp->t_maxrows = 1;
sp->roff = sp->coff = 0;
/* Create a screen map. */
CALLOC_RET(sp, HMAP, SMAP *, SIZE_HMAP(sp), sizeof(SMAP));
TMAP = HMAP + (sp->t_rows - 1);
HMAP->lno = sp->lno;
HMAP->coff = 0;
HMAP->soff = 1;
/*
* Fill the screen map from scratch -- try and center the line. That
* way if we're starting with a file we've seen before, we'll put the
* line in the middle, otherwise, it won't work and we'll end up with
* the line at the top.
*/
F_SET(sp, SC_SCR_REFORMAT | SC_SCR_CENTER);
/* Invalidate the cursor. */
F_SET(vip, VIP_CUR_INVALID);
/* Paint the screen image from scratch. */
F_SET(vip, VIP_N_EX_PAINT);
return (0);
}
