OpenBSD-4.6/gnu/usr.bin/lynx/src/LYEdit.c
#include <sys/wait.h>
#include <HTUtils.h>
#include <HTParse.h>
#include <HTAlert.h>
#include <LYCurses.h>
#include <LYUtils.h>
#include <LYGlobalDefs.h>
#include <LYEdit.h>
#ifdef VMS
#include <unixio.h>
#endif /* VMS */
#include <LYLeaks.h>
BOOLEAN editor_can_position(void)
{
static const char *table[] =
{
#ifdef VMS
"sedt",
"SEDT"
#else
"emacs",
"jed",
"jmacs",
"joe",
"jove",
"jpico",
"jstar",
"pico",
"rjoe",
"vi"
#endif
};
unsigned n;
for (n = 0; n < TABLESIZE(table); n++) {
if (strstr(editor, table[n]) != 0) {
return TRUE;
}
}
return FALSE;
}
/*
* In edit mode invoke the given (or default) editor to display and edit the
* current file. For editors listed in 'editor_can_position()', Lynx will open
* the file to the same line that the screen cursor is on (or close...) when
* editing is invoked.
*
* Returns FALSE if file is uneditable.
*/
int edit_current_file(char *newfile,
int cur,
int lineno)
{
int result = FALSE;
char *filename = NULL;
#if !(defined(VMS) || defined(USE_DOS_DRIVES))
char *colon;
#endif
char *number_sign;
char position[80];
#if defined(VMS) || defined(CANT_EDIT_UNWRITABLE_FILES)
FILE *fp;
#endif
CTRACE((tfp, "edit_current_file(newfile=%s, cur=%d, lineno=%d)\n",
newfile, cur, lineno));
/*
* If it's a remote file then we can't edit it.
*/
if (!LYisLocalFile(newfile)) {
HTUserMsg(CANNOT_EDIT_REMOTE_FILES);
return FALSE;
}
/*
* If there's a fragment, trim it. - FM
*/
number_sign = trimPoundSelector(newfile);
/*
* On Unix, first try to open it as a completely referenced file, then via
* the path alone.
*
* On VMS, only try the path.
*/
#if defined (VMS) || defined (USE_DOS_DRIVES)
filename = HTParse(newfile, "", PARSE_PATH + PARSE_PUNCTUATION);
HTUnEscape(filename);
StrAllocCopy(filename, HTSYS_name(filename));
if (!LYCanReadFile(filename)) {
#ifdef SH_EX
HTUserMsg2(COULD_NOT_EDIT_FILE, filename);
#else
HTAlert(COULD_NOT_ACCESS_FILE);
#endif
CTRACE((tfp, "filename: '%s'\n", filename));
goto done;
}
#else /* something like UNIX */
if (strncmp(newfile, "file://localhost/", 16) == 0)
colon = newfile + 16;
else
colon = strchr(newfile, ':');
StrAllocCopy(filename, (colon + 1));
HTUnEscape(filename);
if (!LYCanReadFile(filename)) {
FREE(filename);
filename = HTParse(newfile, "", PARSE_PATH + PARSE_PUNCTUATION);
HTUnEscape(filename);
if (!LYCanReadFile(HTSYS_name(filename))) {
HTAlert(COULD_NOT_ACCESS_FILE);
goto done;
}
}
#endif
#if defined(VMS) || defined(CANT_EDIT_UNWRITABLE_FILES)
/*
* Don't allow editing if user lacks append access.
*/
if ((fp = fopen(filename, TXT_A)) == NULL) {
HTUserMsg(NOAUTH_TO_EDIT_FILE);
goto done;
}
fclose(fp);
#endif /* VMS || CANT_EDIT_UNWRITABLE_FILES */
/*
* Make sure cur is at least zero. - FM
*/
if (cur < 0) {
cur = 0;
}
/*
* Set up the command for the editor. - FM
*/
*position = 0;
#ifdef VMS
lineno--;
#endif
lineno += (nlinks ? links[cur].ly : 0);
if (lineno > 0)
sprintf(position, "%d", lineno);
edit_temporary_file(filename, position, NULL);
result = TRUE;
done:
/*
* Restore the fragment if there was one. - FM
*/
restorePoundSelector(number_sign);
FREE(filename);
CTRACE((tfp, "edit_current_file returns %d\n", result));
return (result);
}
void edit_temporary_file(char *filename,
const char *position,
const char *message)
{
#ifdef UNIX
struct stat stat_info;
#endif
const char *format = "%s %s";
char *command = NULL;
const char *editor_arg = "";
int params = 1;
int rv;
if (strstr(editor, "pico")) {
editor_arg = " -t"; /* No prompt for filename to use */
}
if (editor_can_position() && *position) {
#ifdef VMS
format = "%s %s -%s%s";
HTAddXpand(&command, format, params++, editor);
HTAddParam(&command, format, params++, filename);
HTAddParam(&command, format, params++, position);
HTAddParam(&command, format, params++, editor_arg);
HTEndParam(&command, format, params);
#else
format = "%s +%s%s %s";
HTAddXpand(&command, format, params++, editor);
HTAddParam(&command, format, params++, position);
HTAddParam(&command, format, params++, editor_arg);
HTAddParam(&command, format, params++, filename);
HTEndParam(&command, format, params);
#endif
}
#ifdef DOSPATH
else if (strncmp(editor, "VZ", 2) == 0) {
/* for Vz editor */
format = "%s %s -%s";
HTAddXpand(&command, format, params++, editor);
HTAddParam(&command, format, params++, HTDOS_short_name(filename));
HTAddParam(&command, format, params++, position);
HTEndParam(&command, format, params);
} else if (strncmp(editor, "edit", 4) == 0) {
/* for standard editor */
HTAddXpand(&command, format, params++, editor);
HTAddParam(&command, format, params++, HTDOS_short_name(filename));
HTEndParam(&command, format, params);
}
#endif
else {
#ifdef _WINDOWS
if (strchr(editor, ' '))
HTAddXpand(&command, format, params++, HTDOS_short_name(editor));
else
HTAddXpand(&command, format, params++, editor);
#else
HTAddXpand(&command, format, params++, editor);
#endif
HTAddParam(&command, format, params++, filename);
HTEndParam(&command, format, params);
}
if (message != NULL) {
_statusline(message);
}
CTRACE((tfp, "LYEdit: %s\n", command));
CTRACE_SLEEP(MessageSecs);
stop_curses();
#ifdef UNIX
set_errno(0);
#endif
if ((rv = LYSystem(command)) != 0) { /* Spawn Editor */
start_curses();
/*
* If something went wrong, we should probably return soon; currently
* we don't, but at least put out a message. - kw
*/
{
#ifdef UNIX
int rvhi = (rv >> 8);
CTRACE((tfp, "ExtEditForm: system() returned %d (0x%x), %s\n",
rv, rv, errno ? LYStrerror(errno) : "reason unknown"));
LYFixCursesOn("show error warning:");
if (rv == -1) {
HTUserMsg2(gettext("Error starting editor, %s"),
LYStrerror(errno));
} else if (WIFSIGNALED(rv)) {
HTAlwaysAlert(NULL, gettext("Editor killed by signal"));
} else if (!(rv == -1 || (rvhi == 127 && errno))) {
HTUserMsg2(gettext("Editor returned with error status, %s"),
(errno
? LYStrerror(errno)
: gettext("reason unknown.")));
} else
#endif
HTAlwaysAlert(NULL, ERROR_SPAWNING_EDITOR);
}
} else {
start_curses();
}
#ifdef UNIX
/*
* Delete backup file, if that's your style.
*/
HTSprintf0(&command, "%s~", filename);
if (stat(command, &stat_info) == 0)
remove(command);
#endif
FREE(command);
}