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IABSD.fr/xenocara/app/xconsole/xconsole.c
matthieu
- app/xconsole/xconsole.c
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/* * Copyright 1990, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. * * Author: Keith Packard, MIT X Consortium */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <X11/Xfuncproto.h> #include <X11/Intrinsic.h> #include <X11/StringDefs.h> #include <X11/Xatom.h> #include <X11/Xmu/Atoms.h> #include <X11/Xmu/StdSel.h> #include <X11/Xmu/SysUtil.h> #include <X11/Xaw/Form.h> #include <X11/Xaw/Label.h> #include <X11/Xaw/Command.h> #include <X11/Xaw/AsciiText.h> #include <X11/Xaw/Dialog.h> #include <X11/Xaw/Cardinals.h> #include <X11/Xaw/Paned.h> #include <X11/Xaw/Box.h> extern char *_XawTextGetSTRING(TextWidget ctx, XawTextPosition left, XawTextPosition right); #include <X11/Xos.h> #include <X11/Xfuncs.h> #include <sys/stat.h> #ifndef _POSIX_SOURCE #define _POSIX_SOURCE #include <stdio.h> #undef _POSIX_SOURCE #else #include <stdio.h> #endif #include <X11/Shell.h> #include <ctype.h> #include <stdlib.h> #ifdef HAVE_OPENPTY # ifdef HAVE_UTIL_H # include <util.h> # endif # ifdef HAVE_LIBUTIL_H # include <libutil.h> # endif # ifdef HAVE_PTY_H # include <pty.h> # endif #endif #define XCONSOLE_MAX_LINE_LENGTH 1024 #ifdef USE_PRIVSEP #include <err.h> #include <pwd.h> #include "xconsole.h" #endif static void inputReady(XtPointer w, int *source, XtInputId *id); static long TextLength(Widget w); static void TextReplace(Widget w, int start, int end, XawTextBlock *block); static void TextAppend(Widget w, char *s, int len); static void TextInsert(Widget w, char *s, int len); static Bool ExceededLineLength(Widget w); static Bool ExceededMaxLines(Widget w); static void ScrollLine(Widget w); static Widget top, text; static XtInputId input_id; static FILE *input; static Boolean regularFile = FALSE; static Boolean notified; static Boolean iconified; static Atom wm_delete_window; static Atom mit_console; #define MIT_CONSOLE_LEN 12 #define MIT_CONSOLE "MIT_CONSOLE_" static char mit_console_name[255 + MIT_CONSOLE_LEN + 1] = MIT_CONSOLE; static struct _app_resources { char *file; Boolean stripNonprint; Boolean notify; Boolean daemon; Boolean verbose; Boolean exitOnFail; int saveLines; } app_resources; #define Offset(field) XtOffsetOf(struct _app_resources, field) static XtResource resources[] = { {"file", "File", XtRString, sizeof (char *), Offset (file), XtRString, "console" }, {"notify", "Notify", XtRBoolean, sizeof (Boolean), Offset (notify), XtRImmediate, (XtPointer)True }, {"stripNonprint", "StripNonprint", XtRBoolean, sizeof (Boolean), Offset (stripNonprint), XtRImmediate, (XtPointer)True }, {"daemon", "Daemon", XtRBoolean, sizeof (Boolean), Offset (daemon), XtRImmediate, (XtPointer)False}, {"verbose", "Verbose", XtRBoolean, sizeof (Boolean), Offset (verbose),XtRImmediate, (XtPointer)False}, {"exitOnFail", "ExitOnFail", XtRBoolean, sizeof (Boolean), Offset (exitOnFail),XtRImmediate, (XtPointer)False}, {"saveLines", "SaveLines", XtRInt, sizeof (int), Offset (saveLines), XtRImmediate, (XtPointer) 0 }, }; #undef Offset static XrmOptionDescRec options[] = { {"-file", "*file", XrmoptionSepArg, NULL}, {"-notify", "*notify", XrmoptionNoArg, "TRUE"}, {"-nonotify", "*notify", XrmoptionNoArg, "FALSE"}, {"-daemon", "*daemon", XrmoptionNoArg, "TRUE"}, {"-verbose", "*verbose", XrmoptionNoArg, "TRUE"}, {"-exitOnFail", "*exitOnFail", XrmoptionNoArg, "TRUE"}, {"-saveLines", "*saveLines", XrmoptionSepArg, NULL}, }; #ifdef linux #define USE_FILE #define FILE_NAME "/dev/xconsole" # if defined (__GLIBC__) && ((__GLIBC__ > 2) || (__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 1)) /* * Linux distribution based on glibc 2.1 and higher should use * devpts. This is the fallback if open file FILE_NAME fails. * <werner@suse.de> */ # define USE_PTS # endif #endif #if !defined (USE_FILE) || defined (linux) # include <sys/ioctl.h> # if defined (SVR4) || defined (USE_PTS) # include <termios.h> # ifndef HAVE_OPENPTY # include <sys/stropts.h> /* for I_PUSH */ # endif # ifdef sun # include <sys/strredir.h> # endif # endif # if defined(TIOCCONS) || defined(SRIOCSREDIR) # define USE_PTY static int tty_fd, pty_fd; # endif #endif #ifdef USE_PTY static int get_pty(int *pty, int *tty); #endif /* Copied from xterm/ptyx.h */ #ifndef PTYCHAR1 #define PTYCHAR1 "pqrstuvwxyzPQRSTUVWXYZ" #endif /* !PTYCHAR1 */ #ifndef PTYCHAR2 #ifdef __FreeBSD__ #define PTYCHAR2 "0123456789abcdefghijklmnopqrstuv" #else /* !__FreeBSD__ */ #define PTYCHAR2 "0123456789abcdef" #endif /* !__FreeBSD__ */ #endif /* !PTYCHAR2 */ static void OpenConsole(void) { input = 0; if (app_resources.file) { if (!strcmp (app_resources.file, "console")) { /* must be owner and have read/write permission */ #if !defined(__NetBSD__) && !defined(__OpenBSD__) struct stat sbuf; # if !defined (linux) if (!stat("/dev/console", &sbuf) && (sbuf.st_uid == getuid()) && !access("/dev/console", R_OK|W_OK)) # endif #endif { #ifdef USE_FILE # ifdef linux if (!stat(FILE_NAME, &sbuf)) # endif input = fopen (FILE_NAME, "r"); #endif #ifdef USE_PTY if (!input && get_pty (&pty_fd, &tty_fd) == 0) { # ifdef TIOCCONS # ifdef USE_PRIVSEP if (priv_set_console(tty_fd) != -1) input = fdopen (pty_fd, "r"); # else int on = 1; if (ioctl (tty_fd, TIOCCONS, (char *) &on) != -1) input = fdopen (pty_fd, "r"); # endif # else int consfd = open("/dev/console", O_RDONLY); if (consfd >= 0) { if (ioctl(consfd, SRIOCSREDIR, tty_fd) != -1) input = fdopen (pty_fd, "r"); close(consfd); } # endif } #endif /* USE_PTY */ } if (input && app_resources.verbose) { char *hostname; TextAppend (text, "Console log for ", 16); hostname = mit_console_name + MIT_CONSOLE_LEN; TextAppend (text, hostname, strlen (hostname)); TextAppend (text, "\n", 1); } } else { regularFile = FALSE; if (access(app_resources.file, R_OK) == 0) { int fd = open (app_resources.file, O_RDONLY | O_NONBLOCK | O_NOCTTY); if (fd != -1) { input = fdopen (fd, "r"); if (input) { struct stat sbuf; if ((fstat(fd, &sbuf) == 0) && S_ISREG(sbuf.st_mode)) regularFile = TRUE; } else close(fd); } } } if (!input) { if (app_resources.exitOnFail) exit(0); TextAppend (text, "Couldn't open ", 14); TextAppend (text, app_resources.file, strlen (app_resources.file)); TextAppend (text, "\n", 1); } } else input = stdin; if (input) { input_id = XtAddInput (fileno (input), (XtPointer) XtInputReadMask, inputReady, (XtPointer) text); } } static void CloseConsole (void) { if (input) { XtRemoveInput (input_id); fclose (input); } #ifdef USE_PTY close (tty_fd); #endif } /*ARGSUSED*/ static void _X_NORETURN Quit(Widget widget, XEvent *event, String *params, Cardinal *num_params) { exit (0); } static void Notify(void) { Arg arglist[1]; char *oldName; char *newName; if (!iconified || !app_resources.notify || notified) return; XtSetArg (arglist[0], XtNiconName, &oldName); XtGetValues (top, arglist, 1); newName = malloc (strlen (oldName) + 3); if (!newName) return; sprintf (newName, "%s *", oldName); XtSetArg (arglist[0], XtNiconName, newName); XtSetValues (top, arglist, 1); free (newName); notified = True; } /*ARGSUSED*/ static void Deiconified(Widget widget, XEvent *event, String *params, Cardinal *num_params) { Arg arglist[1]; char *oldName; char *newName; size_t oldlen; iconified = False; if (!app_resources.notify || !notified) return; XtSetArg (arglist[0], XtNiconName, &oldName); XtGetValues (top, arglist, 1); oldlen = strlen (oldName); if (oldlen >= 2) { newName = malloc (oldlen - 1); if (!newName) return; strncpy (newName, oldName, oldlen - 2); newName[oldlen - 2] = '\0'; XtSetArg (arglist[0], XtNiconName, newName); XtSetValues (top, arglist, 1); free (newName); } notified = False; } /*ARGSUSED*/ static void Iconified(Widget widget, XEvent *event, String *params, Cardinal *num_params) { iconified = True; } /*ARGSUSED*/ static void Clear(Widget widget, XEvent *event, String *params, Cardinal *num_params) { long last; XawTextBlock block; last = TextLength (text); block.ptr = ""; block.firstPos = 0; block.length = 0; block.format = FMT8BIT; TextReplace (text, 0, last, &block); } static XtActionsRec actions[] = { { "Quit", Quit }, { "Iconified", Iconified }, { "Deiconified", Deiconified }, { "Clear", Clear }, }; static void stripNonprint(char *b) { char *c; c = b; while (*b) { if (isprint (*b) || (isspace (*b) && *b != '\r')) { if (c != b) *c = *b; ++c; } ++b; } *c = '\0'; } static void inputReady(XtPointer w, int *source, XtInputId *id) { char buffer[1025]; int n; n = read (*source, buffer, sizeof (buffer) - 1); if (n <= 0) { if (app_resources.file && regularFile && n == 0) { if (XPending(XtDisplay(w))) return; sleep(1); return; } fclose (input); XtRemoveInput (*id); /* try to reopen if pipe; this can be caused by syslog restart */ if (app_resources.file && !regularFile && n == 0) { OpenConsole(); } } else { Notify(); buffer[n] = '\0'; if (app_resources.stripNonprint) { stripNonprint (buffer); n = strlen (buffer); } TextAppend ((Widget) text, buffer, n); } } static Boolean ConvertSelection(Widget w, Atom *selection, Atom *target, Atom *type, XtPointer *value, unsigned long *length, int *format) { Display* d = XtDisplay(w); XSelectionRequestEvent* req = XtGetSelectionRequest(w, *selection, (XtRequestId)NULL); if (*target == XA_TARGETS(d)) { Atom* targetP; Atom* std_targets; unsigned long std_length; XmuConvertStandardSelection(w, req->time, selection, target, type, (XPointer *)&std_targets, &std_length, format); *value = (XtPointer)XtMalloc(sizeof(Atom)*(std_length + 5)); targetP = *(Atom**)value; *targetP++ = XA_STRING; *targetP++ = XA_TEXT(d); *targetP++ = XA_LENGTH(d); *targetP++ = XA_LIST_LENGTH(d); *targetP++ = XA_CHARACTER_POSITION(d); *length = std_length + (targetP - (*(Atom **) value)); memmove( (char*)targetP, (char*)std_targets, sizeof(Atom)*std_length); XtFree((char*)std_targets); *type = XA_ATOM; *format = 32; return True; } if (*target == XA_LIST_LENGTH(d) || *target == XA_LENGTH(d)) { long * temp; temp = (long *) XtMalloc(sizeof(long)); if (*target == XA_LIST_LENGTH(d)) *temp = 1L; else /* *target == XA_LENGTH(d) */ *temp = (long) TextLength (text); *value = (XtPointer) temp; *type = XA_INTEGER; *length = 1L; *format = 32; return True; } if (*target == XA_CHARACTER_POSITION(d)) { long * temp; temp = (long *) XtMalloc(2 * sizeof(long)); temp[0] = (long) 0; temp[1] = TextLength (text); *value = (XtPointer) temp; *type = XA_SPAN(d); *length = 2L; *format = 32; return True; } if (*target == XA_STRING || *target == XA_TEXT(d) || *target == XA_COMPOUND_TEXT(d)) { if (*target == XA_COMPOUND_TEXT(d)) *type = *target; else *type = XA_STRING; *length = TextLength (text); *value = (XtPointer)_XawTextGetSTRING((TextWidget) text, 0, *length); *format = 8; /* * Drop our connection to the file; the new console program * will open as soon as it receives the selection contents; there * is a small window where console output will not be redirected, * but I see no way of avoiding that without having two programs * attempt to redirect console output at the same time, which seems * worse */ CloseConsole (); return True; } if (XmuConvertStandardSelection(w, req->time, selection, target, type, (XPointer *)value, length, format)) return True; return False; } static void _X_NORETURN LoseSelection(Widget w, Atom *selection) { Quit (w, (XEvent*)NULL, (String*)NULL, (Cardinal*)NULL); } /*ARGSUSED*/ static void InsertSelection(Widget w, XtPointer client_data, Atom *selection, Atom *type, XtPointer value, unsigned long *length, int *format) { if (*type != XT_CONVERT_FAIL) TextInsert (text, (char *) value, *length); XtOwnSelection(top, mit_console, CurrentTime, ConvertSelection, LoseSelection, NULL); OpenConsole (); } static void _X_NORETURN usage(int exitval) { const char *usage_message = "usage: xconsole [-toolkitoption ...] [-file file-name] [-notify|-nonotify]\n" " [-stripNonprint] [-daemon] [-verbose] [-exitOnFail]\n" " [-saveLines count]\n" " xconsole -help\n" " xconsole -version\n"; fputs(usage_message, stderr); exit(exitval); } int main(int argc, char *argv[]) { Arg arglist[10]; Cardinal num_args; #ifdef USE_PRIVSEP struct passwd *pw; #endif XtSetLanguageProc(NULL,NULL,NULL); /* Handle args that don't require opening a display */ for (int n = 1; n < argc; n++) { const char *argn = argv[n]; /* accept single or double dash for -help & -version */ if (argn[0] == '-' && argn[1] == '-') { argn++; } if (strcmp(argn, "-help") == 0) { usage(0); } if (strcmp(argn, "-version") == 0) { puts(PACKAGE_STRING); exit(0); } } top = XtInitialize ("xconsole", "XConsole", options, XtNumber (options), &argc, argv); if (argc != 1) { fputs("Unknown argument(s):", stderr); for (int n = 1; n < argc; n++) { fprintf(stderr, " %s", argv[n]); } fputs("\n\n", stderr); usage(1); } XtGetApplicationResources (top, (XtPointer)&app_resources, resources, XtNumber (resources), NULL, 0); #ifdef USE_PRIVSEP /* Revoke privileges if any */ if (getuid() == 0) { /* Running as root */ pw = getpwnam(XCONSOLE_USER); if (!pw) { fprintf(stderr, "%s user not found\n", XCONSOLE_USER); exit(2); } if (priv_init(pw->pw_uid, pw->pw_gid) < 0) { fprintf(stderr, "priv_init failed\n"); exit(2); } } else if (priv_init(-1, -1) < 0) { fprintf(stderr, "priv_init failed\n"); exit(2); } #endif if (app_resources.daemon) if (fork ()) exit (0); XtAddActions (actions, XtNumber (actions)); text = XtCreateManagedWidget ("text", asciiTextWidgetClass, top, NULL, 0); XtRealizeWidget (top); num_args = 0; XtSetArg(arglist[num_args], XtNiconic, &iconified); num_args++; XtGetValues(top, arglist, num_args); if (iconified) Iconified((Widget)NULL, (XEvent*)NULL, (String*)NULL, (Cardinal*)NULL); else Deiconified((Widget)NULL,(XEvent*)NULL,(String*)NULL,(Cardinal*)NULL); wm_delete_window = XInternAtom(XtDisplay(top), "WM_DELETE_WINDOW", False); (void) XSetWMProtocols (XtDisplay(top), XtWindow(top), &wm_delete_window, 1); XmuGetHostname (mit_console_name + MIT_CONSOLE_LEN, 255); mit_console = XInternAtom(XtDisplay(top), mit_console_name, False); if (XGetSelectionOwner (XtDisplay (top), mit_console)) { XtGetSelectionValue(top, mit_console, XA_STRING, InsertSelection, NULL, CurrentTime); } else { XtOwnSelection(top, mit_console, CurrentTime, ConvertSelection, LoseSelection, NULL); OpenConsole (); } #ifdef USE_PRIVSEP if (pledge("stdio rpath sendfd recvfd", NULL) == -1) err(1, "pledge"); #endif XtMainLoop (); return 0; } static long TextLength(Widget w) { return XawTextSourceScan (XawTextGetSource (w), (XawTextPosition) 0, XawstAll, XawsdRight, 1, TRUE); } static void TextReplace(Widget w, int start, int end, XawTextBlock *block) { Arg arg; Widget source; XawTextEditType edit_mode; source = XawTextGetSource (w); XtSetArg (arg, XtNeditType, &edit_mode); XtGetValues (source, &arg, ONE); XtSetArg (arg, XtNeditType, XawtextEdit); XtSetValues (source, &arg, ONE); XawTextReplace (w, start, end, block); XtSetArg (arg, XtNeditType, edit_mode); XtSetValues (source, &arg, ONE); } static void TextAppend(Widget w, char *s, int len) { long last, current; XawTextBlock block; current = XawTextGetInsertionPoint (w); last = TextLength (w); block.ptr = s; block.firstPos = 0; block.length = len; block.format = FMT8BIT; /* * If saveLines is 1, just replace the entire contents of the widget * each time, so the test in ExceededMaxLines() isn't fooled. */ if (app_resources.saveLines == 1) TextReplace (w, 0, last, &block); else TextReplace (w, last, last, &block); if (current == last) XawTextSetInsertionPoint (w, last + block.length); if (ExceededLineLength(w)) { block.ptr = "\n"; block.firstPos = 0; block.length = 1; block.format = FMT8BIT; TextReplace(w, last, last, &block); } if (ExceededMaxLines(w)) ScrollLine(w); } static void TextInsert(Widget w, char *s, int len) { XawTextBlock block; long current; current = XawTextGetInsertionPoint (w); block.ptr = s; block.firstPos = 0; block.length = len; block.format = FMT8BIT; TextReplace (w, 0, 0, &block); if (current == 0) XawTextSetInsertionPoint (w, len); if (ExceededMaxLines(w)) ScrollLine(w); } static Bool ExceededLineLength(Widget w) { XawTextPosition last_end_of_line; long length = TextLength(w); last_end_of_line = XawTextSourceScan (XawTextGetSource(w), (XawTextPosition)length, XawstEOL, XawsdLeft, 1, TRUE); if (length - last_end_of_line > XCONSOLE_MAX_LINE_LENGTH) return True; return False; } static Bool ExceededMaxLines(Widget w) { XawTextPosition end_of_last_line; Bool retval = False; if (app_resources.saveLines > 0) { /* * XawTextSourceScan() will return the end of the widget if it cannot * find what it is searching for. */ end_of_last_line = XawTextSourceScan (XawTextGetSource (w), (XawTextPosition) 0, XawstEOL, XawsdRight, app_resources.saveLines, TRUE); if (TextLength(w) > end_of_last_line) retval = True; else retval = False; } else retval = False; return retval; } static void ScrollLine(Widget w) { XawTextPosition firstnewline; XawTextBlock block; /* * This is pretty inefficient but should work well enough unless the * console device is getting totally spammed. Generally, new lines * only come in one at a time anyway. */ firstnewline = XawTextSourceScan (XawTextGetSource (w), (XawTextPosition) 0, XawstEOL, XawsdRight, 1, TRUE); block.ptr = ""; block.firstPos = 0; block.length = 0; block.format = FMT8BIT; TextReplace (w, 0, firstnewline, &block); } #ifdef USE_PTY /* * This function opens up a pty master and stuffs its value into pty. * If it finds one, it returns a value of 0. If it does not find one, * it returns a value of !0. This routine is designed to be re-entrant, * so that if a pty master is found and later, we find that the slave * has problems, we can re-enter this function and get another one. */ static int get_pty(int *pty, int *tty) { #ifdef USE_PRIVSEP if (priv_openpty(pty, tty) < 0) { return 1; } return 0; #elif HAVE_OPENPTY if (openpty(pty, tty, NULL, NULL, NULL) == -1) { return 1; } return 0; #else static char ttydev[64], ptydev[64]; #if defined (SVR4) || defined (USE_PTS) if ((*pty = open ("/dev/ptmx", O_RDWR)) < 0) return 1; grantpt(*pty); unlockpt(*pty); strcpy(ttydev, (char *)ptsname(*pty)); if ((*tty = open(ttydev, O_RDWR)) >= 0) { (void)ioctl(*tty, I_PUSH, "ttcompat"); return 0; } if (*pty >= 0) close (*pty); #else /* !SVR4, need lots of code */ #ifdef USE_GET_PSEUDOTTY if ((*pty = getpseudotty (&ttydev, &ptydev)) >= 0 && (*tty = open (ttydev, O_RDWR)) >= 0) return 0; if (*pty >= 0) close (*pty); #else static int devindex, letter = 0; strcpy (ttydev, "/dev/ttyxx"); strcpy (ptydev, "/dev/ptyxx"); while (PTYCHAR1[letter]) { ttydev [strlen(ttydev) - 2] = ptydev [strlen(ptydev) - 2] = PTYCHAR1 [letter]; while (PTYCHAR2[devindex]) { ttydev [strlen(ttydev) - 1] = ptydev [strlen(ptydev) - 1] = PTYCHAR2 [devindex]; if ((*pty = open (ptydev, O_RDWR)) >= 0 && (*tty = open (ttydev, O_RDWR)) >= 0) { /* * We need to set things up for our next entry * into this function! */ (void) devindex++; return(0); } if (*pty >= 0) close (*pty); devindex++; } devindex = 0; (void) letter++; } #endif /* USE_GET_PSEUDOTTY */ #endif /* SVR4 */ /* * We were unable to allocate a pty master! Return an error * condition and let our caller terminate cleanly. */ return(1); #endif /* HAVE_OPENPTY */ } #endif