/*
* ex_source -- :source file
* Execute ex commands from a file.
*
* PUBLIC: int ex_source __P((SCR *, EXCMD *));
*/
int
ex_source(SCR *sp, EXCMD *cmdp)
{
struct stat sb;
int fd, len;
char *bp;
const char *name;
size_t nlen;
const CHAR_T *wp;
CHAR_T *dp;
size_t wlen;
INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen);
if ((fd = open(name, O_RDONLY, 0)) < 0 || fstat(fd, &sb))
goto err;
/*
* XXX
* I'd like to test to see if the file is too large to malloc. Since
* we don't know what size or type off_t's or size_t's are, what the
* largest unsigned integral type is, or what random insanity the local
* C compiler will perpetrate, doing the comparison in a portable way
* is flatly impossible. So, put an fairly unreasonable limit on it,
* I don't want to be dropping core here.
*/
#define MEGABYTE 1048576
if (sb.st_size > MEGABYTE) {
errno = ENOMEM;
goto err;
}
MALLOC(sp, bp, char *, (size_t)sb.st_size + 1);
if (bp == NULL) {
(void)close(fd);
return (1);
}
bp[sb.st_size] = '\0';
/* Read the file into memory. */
len = read(fd, bp, (int)sb.st_size);
(void)close(fd);
if (len == -1 || len != sb.st_size) {
if (len != sb.st_size)
errno = EIO;
free(bp);
err: msgq_str(sp, M_SYSERR, name, "%s");
return (1);
}
if (CHAR2INT(sp, bp, (size_t)sb.st_size + 1, wp, wlen))
msgq(sp, M_ERR, "323|Invalid input. Truncated.");
dp = v_wstrdup(sp, wp, wlen - 1);
free(bp);
/* Put it on the ex queue. */
INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, name, nlen);
return (ex_run_str(sp, name, dp, wlen - 1, 1, 1));
}
/*
* ex_exrc --
* Read the EXINIT environment variable and the startup exrc files,
* and execute their commands.
*
* PUBLIC: int ex_exrc(SCR *);
*/
int
ex_exrc(SCR *sp)
{
struct stat hsb, lsb;
char *p, *path;
CHAR_T *wp;
size_t wlen;
/*
* Source the system, environment, $HOME and local .exrc values.
* Vi historically didn't check $HOME/.exrc if the environment
* variable EXINIT was set. This is all done before the file is
* read in, because things in the .exrc information can set, for
* example, the recovery directory.
*
* !!!
* While nvi can handle any of the options settings of historic vi,
* the converse is not true. Since users are going to have to have
* files and environmental variables that work with both, we use nvi
* versions of both the $HOME and local startup files if they exist,
* otherwise the historic ones.
*
* !!!
* For a discussion of permissions and when what .exrc files are
* read, see the comment above the exrc_isok() function below.
*
* !!!
* If the user started the historic of vi in $HOME, vi read the user's
* .exrc file twice, as $HOME/.exrc and as ./.exrc. We avoid this, as
* it's going to make some commands behave oddly, and I can't imagine
* anyone depending on it.
*/
switch (exrc_isok(sp, &hsb, _PATH_SYSEXRC, 1, 0)) {
case NOEXIST:
case NOPERM:
break;
case RCOK:
if (ex_run_file(sp, _PATH_SYSEXRC))
return (1);
break;
}
/* Run the commands. */
if (EXCMD_RUNNING(sp->gp))
(void)ex_cmd(sp);
if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE))
return (0);
if ((p = getenv("NEXINIT")) != NULL) {
CHAR2INT(sp, p, strlen(p) + 1, wp, wlen);
if (ex_run_str(sp, "NEXINIT", wp, wlen - 1, 1, 0))
return (1);
} else if ((p = getenv("EXINIT")) != NULL) {
CHAR2INT(sp, p, strlen(p) + 1, wp, wlen);
if (ex_run_str(sp, "EXINIT", wp, wlen - 1, 1, 0))
return (1);
} else if ((p = getenv("HOME")) != NULL && *p) {
int st = 0;
if ((path = join(p, _PATH_NEXRC)) == NULL) {
msgq(sp, M_SYSERR, NULL);
return (1);
}
switch (exrc_isok(sp, &hsb, path, 0, 1)) {
case NOEXIST:
free(path);
if ((path = join(p, _PATH_EXRC)) == NULL) {
msgq(sp, M_SYSERR, NULL);
return (1);
}
if (exrc_isok(sp,
&hsb, path, 0, 1) == RCOK && ex_run_file(sp, path))
st = 1;
break;
case NOPERM:
break;
case RCOK:
if (ex_run_file(sp, path))
st = 1;
break;
}
free(path);
if (st)
return st;
}
/* Run the commands. */
if (EXCMD_RUNNING(sp->gp))
(void)ex_cmd(sp);
if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE))
return (0);
/* Previous commands may have set the exrc option. */
if (O_ISSET(sp, O_EXRC)) {
switch (exrc_isok(sp, &lsb, _PATH_NEXRC, 0, 0)) {
case NOEXIST:
if (exrc_isok(sp, &lsb, _PATH_EXRC, 0, 0) == RCOK &&
(lsb.st_dev != hsb.st_dev ||
lsb.st_ino != hsb.st_ino) &&
ex_run_file(sp, _PATH_EXRC))
return (1);
break;
case NOPERM:
break;
case RCOK:
if ((lsb.st_dev != hsb.st_dev ||
lsb.st_ino != hsb.st_ino) &&
ex_run_file(sp, _PATH_NEXRC))
return (1);
break;
}
/* Run the commands. */
if (EXCMD_RUNNING(sp->gp))
(void)ex_cmd(sp);
if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE))
return (0);
}
return (0);
}
/*
* file_cinit --
* Set up the initial cursor position.
*/
static void
file_cinit(SCR *sp)
{
GS *gp;
MARK m;
size_t len;
int nb;
CHAR_T *wp;
size_t wlen;
/* Set some basic defaults. */
sp->lno = 1;
sp->cno = 0;
/*
* Historically, initial commands (the -c option) weren't executed
* until a file was loaded, e.g. "vi +10 nofile", followed by an
* :edit or :tag command, would execute the +10 on the file loaded
* by the subsequent command, (assuming that it existed). This
* applied as well to files loaded using the tag commands, and we
* follow that historic practice. Also, all initial commands were
* ex commands and were always executed on the last line of the file.
*
* Otherwise, if no initial command for this file:
* If in ex mode, move to the last line, first nonblank character.
* If the file has previously been edited, move to the last known
* position, and check it for validity.
* Otherwise, move to the first line, first nonblank.
*
* This gets called by the file init code, because we may be in a
* file of ex commands and we want to execute them from the right
* location in the file.
*/
nb = 0;
gp = sp->gp;
if (gp->c_option != NULL && !F_ISSET(sp->frp, FR_NEWFILE)) {
if (db_last(sp, &sp->lno))
return;
if (sp->lno == 0) {
sp->lno = 1;
sp->cno = 0;
}
CHAR2INT(sp, gp->c_option, strlen(gp->c_option) + 1,
wp, wlen);
if (ex_run_str(sp, "-c option", wp, wlen - 1, 1, 1))
return;
gp->c_option = NULL;
} else if (F_ISSET(sp, SC_EX)) {
if (db_last(sp, &sp->lno))
return;
if (sp->lno == 0) {
sp->lno = 1;
sp->cno = 0;
return;
}
nb = 1;
} else {
if (F_ISSET(sp->frp, FR_CURSORSET)) {
sp->lno = sp->frp->lno;
sp->cno = sp->frp->cno;
/* If returning to a file in vi, center the line. */
F_SET(sp, SC_SCR_CENTER);
} else {
if (O_ISSET(sp, O_COMMENT))
file_comment(sp);
else
sp->lno = 1;
nb = 1;
}
if (db_get(sp, sp->lno, 0, NULL, &len)) {
sp->lno = 1;
sp->cno = 0;
return;
}
if (!nb && sp->cno > len)
nb = 1;
}
if (nb) {
sp->cno = 0;
(void)nonblank(sp, sp->lno, &sp->cno);
}
/*
* !!!
* The initial column is also the most attractive column.
*/
sp->rcm = sp->cno;
/*
* !!!
* Historically, vi initialized the absolute mark, but ex did not.
* Which meant, that if the first command in ex mode was "visual",
* or if an ex command was executed first (e.g. vi +10 file) vi was
* entered without the mark being initialized. For consistency, if
* the file isn't empty, we initialize it for everyone, believing
* that it can't hurt, and is generally useful. Not initializing it
* if the file is empty is historic practice, although it has always
* been possible to set (and use) marks in empty vi files.
*/
m.lno = sp->lno;
m.cno = sp->cno;
(void)mark_set(sp, ABSMARK1, &m, 0);
}
