/*
* v_quit --
* Quit command.
*/
static int
v_quit(SCR *sp, VICMD *vp)
{
EXCMD cmd;
ex_cinit(sp, &cmd, C_QUIT, 0, OOBLNO, OOBLNO, 0);
return (v_exec_ex(sp, vp, &cmd));
}
/*
* v_edit --
* Edit command.
*/
static int
v_edit(SCR *sp, VICMD *vp)
{
EXCMD cmd;
ex_cinit(sp, &cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0);
argv_exp0(sp, &cmd, vp->ev.e_csp, vp->ev.e_len);
return (v_exec_ex(sp, vp, &cmd));
}
/*
* api_edit
* Create a new screen and return its id
* or edit a new file in the current screen.
*
* PUBLIC: int api_edit __P((SCR *, char *, SCR **, int));
*/
int
api_edit(SCR *sp, char *file, SCR **spp, int newscreen)
{
EXCMD cmd;
size_t wlen;
const CHAR_T *wp;
if (file) {
ex_cinit(sp, &cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0);
CHAR2INT(sp, file, strlen(file) + 1, wp, wlen);
argv_exp0(sp, &cmd, wp, wlen - 1 /* terminating 0 */);
} else
ex_cinit(sp, &cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0);
if (newscreen)
cmd.flags |= E_NEWSCREEN; /* XXX */
if (cmd.cmd->fn(sp, &cmd))
return (1);
*spp = sp->nextdisp;
return (0);
}
/*
* ex_run_file --
* Set up a file of ex commands to run.
*/
static int
ex_run_file(SCR *sp, char *name)
{
EXCMD cmd;
CHAR_T *wp;
size_t wlen;
ex_cinit(sp, &cmd, C_SOURCE, 0, OOBLNO, OOBLNO, 0);
CHAR2INT(sp, name, strlen(name)+1, wp, wlen);
argv_exp0(sp, &cmd, wp, wlen - 1);
return (ex_source(sp, &cmd));
}
/*
* v_write --
* Write command.
*/
static int
v_write(SCR *sp, VICMD *vp)
{
EXCMD cmd;
ex_cinit(sp, &cmd, C_WRITE, 0, OOBLNO, OOBLNO, 0);
cmd.addr1.lno = 1;
if (db_last(sp, &cmd.addr2.lno))
return (1);
return (v_exec_ex(sp, vp, &cmd));
}
/*
* v_tag --
* Tag command.
*/
static int
v_tag(SCR *sp, VICMD *vp)
{
EXCMD cmd;
if (v_curword(sp))
return (1);
ex_cinit(sp, &cmd, C_TAG, 0, OOBLNO, OOBLNO, 0);
argv_exp0(sp, &cmd, VIP(sp)->keyw, STRLEN(VIP(sp)->keyw));
return (v_exec_ex(sp, vp, &cmd));
}
/*
* api_escreen
* End a screen.
*
* PUBLIC: int api_escreen __P((SCR *));
*/
int
api_escreen(SCR *sp)
{
EXCMD cmd;
/*
* XXX
* If the interpreter exits anything other than the current
* screen, vi isn't going to update everything correctly.
*/
ex_cinit(sp, &cmd, C_QUIT, 0, OOBLNO, OOBLNO, 0);
return (cmd.cmd->fn(sp, &cmd));
}
/*
* ex_tag_first --
* The tag code can be entered from main, e.g., "vi -t tag".
*
* PUBLIC: int ex_tag_first __P((SCR *, CHAR_T *));
*/
int
ex_tag_first(SCR *sp, const CHAR_T *tagarg)
{
EXCMD cmd;
/* Build an argument for the ex :tag command. */
ex_cinit(sp, &cmd, C_TAG, 0, OOBLNO, OOBLNO, 0);
argv_exp0(sp, &cmd, tagarg, STRLEN(tagarg));
/*
* XXX
* Historic vi went ahead and created a temporary file when it failed
* to find the tag. We match historic practice, but don't distinguish
* between real error and failure to find the tag.
*/
if (ex_tag_push(sp, &cmd))
return (0);
/* Display tags in the center of the screen. */
F_CLR(sp, SC_SCR_TOP);
F_SET(sp, SC_SCR_CENTER);
return (0);
}
/*
* file_backup --
* Backup the about-to-be-written file.
*
* XXX
* We do the backup by copying the entire file. It would be nice to do
* a rename instead, but: (1) both files may not fit and we want to fail
* before doing the rename; (2) the backup file may not be on the same
* disk partition as the file being written; (3) there may be optional
* file information (MACs, DACs, whatever) that we won't get right if we
* recreate the file. So, let's not risk it.
*/
static int
file_backup(SCR *sp, char *name, char *bname)
{
struct dirent *dp;
struct stat sb;
DIR *dirp;
EXCMD cmd;
off_t off;
size_t blen;
int flags, maxnum, nr, num, nw, rfd, wfd, version;
char *bp, *estr, *p, *pct, *slash, *t, *wfname, buf[8192];
CHAR_T *wp;
size_t wlen;
size_t nlen;
char *d = NULL;
rfd = wfd = -1;
bp = estr = wfname = NULL;
/*
* Open the current file for reading. Do this first, so that
* we don't exec a shell before the most likely failure point.
* If it doesn't exist, it's okay, there's just nothing to back
* up.
*/
errno = 0;
if ((rfd = open(name, O_RDONLY, 0)) < 0) {
if (errno == ENOENT)
return (0);
estr = name;
goto err;
}
/*
* If the name starts with an 'N' character, add a version number
* to the name. Strip the leading N from the string passed to the
* expansion routines, for no particular reason. It would be nice
* to permit users to put the version number anywhere in the backup
* name, but there isn't a special character that we can use in the
* name, and giving a new character a special meaning leads to ugly
* hacks both here and in the supporting ex routines.
*
* Shell and file name expand the option's value.
*/
ex_cinit(sp, &cmd, 0, 0, 0, 0, 0);
if (bname[0] == 'N') {
version = 1;
++bname;
} else
version = 0;
CHAR2INT(sp, bname, strlen(bname) + 1, wp, wlen);
if (argv_exp2(sp, &cmd, wp, wlen - 1))
return (1);
/*
* 0 args: impossible.
* 1 args: use it.
* >1 args: object, too many args.
*/
if (cmd.argc != 1) {
msgq_str(sp, M_ERR, bname,
"258|%s expanded into too many file names");
(void)close(rfd);
return (1);
}
/*
* If appending a version number, read through the directory, looking
* for file names that match the name followed by a number. Make all
* of the other % characters in name literal, so the user doesn't get
* surprised and sscanf doesn't drop core indirecting through pointers
* that don't exist. If any such files are found, increment its number
* by one.
*/
if (version) {
GET_SPACE_GOTOC(sp, bp, blen, cmd.argv[0]->len * 2 + 50);
INT2SYS(sp, cmd.argv[0]->bp, cmd.argv[0]->len + 1,
p, nlen);
d = strdup(p);
p = d;
for (t = bp, slash = NULL;
p[0] != '\0'; *t++ = *p++)
if (p[0] == '%') {
if (p[1] != '%')
*t++ = '%';
} else if (p[0] == '/')
slash = t;
pct = t;
*t++ = '%';
*t++ = 'd';
*t = '\0';
if (slash == NULL) {
dirp = opendir(".");
p = bp;
} else {
*slash = '\0';
dirp = opendir(bp);
*slash = '/';
p = slash + 1;
}
if (dirp == NULL) {
INT2SYS(sp, cmd.argv[0]->bp, cmd.argv[0]->len + 1,
estr, nlen);
goto err;
}
for (maxnum = 0; (dp = readdir(dirp)) != NULL;)
if (sscanf(dp->d_name, p, &num) == 1 && num > maxnum)
maxnum = num;
(void)closedir(dirp);
/* Format the backup file name. */
(void)snprintf(pct, blen - (pct - bp), "%d", maxnum + 1);
wfname = bp;
} else {
bp = NULL;
INT2SYS(sp, cmd.argv[0]->bp, cmd.argv[0]->len + 1,
wfname, nlen);
}
/* Open the backup file, avoiding lurkers. */
if (stat(wfname, &sb) == 0) {
if (!S_ISREG(sb.st_mode)) {
msgq_str(sp, M_ERR, bname,
"259|%s: not a regular file");
goto err;
}
if (sb.st_uid != getuid()) {
msgq_str(sp, M_ERR, bname, "260|%s: not owned by you");
goto err;
}
if (sb.st_mode & (S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) {
msgq_str(sp, M_ERR, bname,
"261|%s: accessible by a user other than the owner");
goto err;
}
flags = O_TRUNC;
} else
flags = O_CREAT | O_EXCL;
if ((wfd = open(wfname, flags | O_WRONLY, S_IRUSR | S_IWUSR)) < 0) {
estr = bname;
goto err;
}
/* Copy the file's current contents to its backup value. */
while ((nr = read(rfd, buf, sizeof(buf))) > 0)
for (off = 0; nr != 0; nr -= nw, off += nw)
if ((nw = write(wfd, buf + off, nr)) < 0) {
estr = wfname;
goto err;
}
if (nr < 0) {
estr = name;
goto err;
}
if (close(rfd)) {
estr = name;
goto err;
}
if (close(wfd)) {
estr = wfname;
goto err;
}
if (bp != NULL)
FREE_SPACE(sp, bp, blen);
return (0);
alloc_err:
err:
if (rfd != -1)
(void)close(rfd);
if (wfd != -1) {
(void)unlink(wfname);
(void)close(wfd);
}
if (estr)
msgq_str(sp, M_SYSERR, estr, "%s");
if (d != NULL)
free(d);
if (bp != NULL)
FREE_SPACE(sp, bp, blen);
return (1);
}
