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-rw-r--r--gnu/usr.bin/kgdb/utils.c1094
1 files changed, 1094 insertions, 0 deletions
diff --git a/gnu/usr.bin/kgdb/utils.c b/gnu/usr.bin/kgdb/utils.c
new file mode 100644
index 000000000000..67ff50585193
--- /dev/null
+++ b/gnu/usr.bin/kgdb/utils.c
@@ -0,0 +1,1094 @@
+/*-
+ * This code is derived from software copyrighted by the Free Software
+ * Foundation.
+ *
+ * Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
+ * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory.
+ *
+ * $Header: /home/ncvs/src/gnu/usr.bin/kgdb/utils.c,v 1.3 1995/05/30 05:01:24 rgrimes Exp $;
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)utils.c 6.4 (Berkeley) 5/8/91";
+#endif /* not lint */
+
+/* General utility routines for GDB, the GNU debugger.
+ Copyright (C) 1986, 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GDB is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GDB; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "param.h"
+
+#include <stdio.h>
+#include <ctype.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <pwd.h>
+#include "defs.h"
+#ifdef HAVE_TERMIO
+#include <termio.h>
+#endif
+
+/* If this definition isn't overridden by the header files, assume
+ that isatty and fileno exist on this system. */
+#ifndef ISATTY
+#define ISATTY(FP) (isatty (fileno (FP)))
+#endif
+
+extern FILE *instream;
+
+void error ();
+void fatal ();
+
+/* Chain of cleanup actions established with make_cleanup,
+ to be executed if an error happens. */
+
+static struct cleanup *cleanup_chain;
+
+/* Nonzero means a quit has been requested. */
+
+int quit_flag;
+
+/* Nonzero means quit immediately if Control-C is typed now,
+ rather than waiting until QUIT is executed. */
+
+int immediate_quit;
+
+/* Add a new cleanup to the cleanup_chain,
+ and return the previous chain pointer
+ to be passed later to do_cleanups or discard_cleanups.
+ Args are FUNCTION to clean up with, and ARG to pass to it. */
+
+struct cleanup *
+make_cleanup (function, arg)
+ void (*function) ();
+ int arg;
+{
+ register struct cleanup *new
+ = (struct cleanup *) xmalloc (sizeof (struct cleanup));
+ register struct cleanup *old_chain = cleanup_chain;
+
+ new->next = cleanup_chain;
+ new->function = function;
+ new->arg = arg;
+ cleanup_chain = new;
+
+ return old_chain;
+}
+
+/* Discard cleanups and do the actions they describe
+ until we get back to the point OLD_CHAIN in the cleanup_chain. */
+
+void
+do_cleanups (old_chain)
+ register struct cleanup *old_chain;
+{
+ register struct cleanup *ptr;
+ while ((ptr = cleanup_chain) != old_chain)
+ {
+ (*ptr->function) (ptr->arg);
+ cleanup_chain = ptr->next;
+ free (ptr);
+ }
+}
+
+/* Discard cleanups, not doing the actions they describe,
+ until we get back to the point OLD_CHAIN in the cleanup_chain. */
+
+void
+discard_cleanups (old_chain)
+ register struct cleanup *old_chain;
+{
+ register struct cleanup *ptr;
+ while ((ptr = cleanup_chain) != old_chain)
+ {
+ cleanup_chain = ptr->next;
+ free (ptr);
+ }
+}
+
+/* Set the cleanup_chain to 0, and return the old cleanup chain. */
+struct cleanup *
+save_cleanups ()
+{
+ struct cleanup *old_chain = cleanup_chain;
+
+ cleanup_chain = 0;
+ return old_chain;
+}
+
+/* Restore the cleanup chain from a previously saved chain. */
+void
+restore_cleanups (chain)
+ struct cleanup *chain;
+{
+ cleanup_chain = chain;
+}
+
+/* This function is useful for cleanups.
+ Do
+
+ foo = xmalloc (...);
+ old_chain = make_cleanup (free_current_contents, &foo);
+
+ to arrange to free the object thus allocated. */
+
+void
+free_current_contents (location)
+ char **location;
+{
+ free (*location);
+}
+
+/* Generally useful subroutines used throughout the program. */
+
+/* Like malloc but get error if no storage available. */
+
+char *
+xmalloc (size)
+ long size;
+{
+ register char *val = (char *) malloc (size);
+ if (!val)
+ fatal ("virtual memory exhausted.", 0);
+ return val;
+}
+
+/* Like realloc but get error if no storage available. */
+
+char *
+xrealloc (ptr, size)
+ char *ptr;
+ long size;
+{
+ register char *val = (char *) realloc (ptr, size);
+ if (!val)
+ fatal ("virtual memory exhausted.", 0);
+ return val;
+}
+
+/* Print the system error message for errno, and also mention STRING
+ as the file name for which the error was encountered.
+ Then return to command level. */
+
+void
+perror_with_name (string)
+ char *string;
+{
+ extern int sys_nerr;
+ extern int errno;
+ char *err;
+ char *combined;
+
+ if (errno < sys_nerr)
+ err = sys_errlist[errno];
+ else
+ err = "unknown error";
+
+ combined = (char *) alloca (strlen (err) + strlen (string) + 3);
+ strcpy (combined, string);
+ strcat (combined, ": ");
+ strcat (combined, err);
+
+ error ("%s.", combined);
+}
+
+/* Print the system error message for ERRCODE, and also mention STRING
+ as the file name for which the error was encountered. */
+
+void
+print_sys_errmsg (string, errcode)
+ char *string;
+ int errcode;
+{
+ extern int sys_nerr;
+ char *err;
+ char *combined;
+
+ if (errcode < sys_nerr)
+ err = sys_errlist[errcode];
+ else
+ err = "unknown error";
+
+ combined = (char *) alloca (strlen (err) + strlen (string) + 3);
+ strcpy (combined, string);
+ strcat (combined, ": ");
+ strcat (combined, err);
+
+ printf ("%s.\n", combined);
+}
+
+void
+quit ()
+{
+#ifdef HAVE_TERMIO
+ ioctl (fileno (stdout), TCFLSH, 1);
+#else /* not HAVE_TERMIO */
+ ioctl (fileno (stdout), TIOCFLUSH, 0);
+#endif /* not HAVE_TERMIO */
+#ifdef TIOCGPGRP
+ error ("Quit");
+#else
+ error ("Quit (expect signal %d when inferior is resumed)", SIGINT);
+#endif /* TIOCGPGRP */
+}
+
+/* Control C comes here */
+
+void
+request_quit ()
+{
+ extern int remote_debugging;
+
+ quit_flag = 1;
+
+#ifdef USG
+ /* Restore the signal handler. */
+ signal (SIGINT, request_quit);
+#endif
+
+ if (immediate_quit)
+ quit();
+}
+
+/* Print an error message and return to command level.
+ STRING is the error message, used as a fprintf string,
+ and ARG is passed as an argument to it. */
+
+void
+error (string, arg1, arg2, arg3)
+ char *string;
+ int arg1, arg2, arg3;
+{
+ terminal_ours (); /* Should be ok even if no inf. */
+ fflush (stdout);
+ fprintf (stderr, string, arg1, arg2, arg3);
+ fprintf (stderr, "\n");
+ return_to_top_level ();
+}
+
+/* Print an error message and exit reporting failure.
+ This is for a error that we cannot continue from.
+ STRING and ARG are passed to fprintf. */
+
+void
+fatal (string, arg)
+ char *string;
+ int arg;
+{
+ fprintf (stderr, "gdb: ");
+ fprintf (stderr, string, arg);
+ fprintf (stderr, "\n");
+ exit (1);
+}
+
+/* Print an error message and exit, dumping core.
+ STRING is a printf-style control string, and ARG is a corresponding
+ argument. */
+void
+fatal_dump_core (string, arg)
+ char *string;
+ int arg;
+{
+ /* "internal error" is always correct, since GDB should never dump
+ core, no matter what the input. */
+ fprintf (stderr, "gdb internal error: ");
+ fprintf (stderr, string, arg);
+ fprintf (stderr, "\n");
+ signal (SIGQUIT, SIG_DFL);
+ kill (getpid (), SIGQUIT);
+ /* We should never get here, but just in case... */
+ exit (1);
+}
+
+/* Make a copy of the string at PTR with SIZE characters
+ (and add a null character at the end in the copy).
+ Uses malloc to get the space. Returns the address of the copy. */
+
+char *
+savestring (ptr, size)
+ char *ptr;
+ int size;
+{
+ register char *p = (char *) xmalloc (size + 1);
+ bcopy (ptr, p, size);
+ p[size] = 0;
+ return p;
+}
+
+char *
+concat (s1, s2, s3)
+ char *s1, *s2, *s3;
+{
+ register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
+ register char *val = (char *) xmalloc (len);
+ strcpy (val, s1);
+ strcat (val, s2);
+ strcat (val, s3);
+ return val;
+}
+
+void
+print_spaces (n, file)
+ register int n;
+ register FILE *file;
+{
+ while (n-- > 0)
+ fputc (' ', file);
+}
+
+/* Ask user a y-or-n question and return 1 iff answer is yes.
+ Takes three args which are given to printf to print the question.
+ The first, a control string, should end in "? ".
+ It should not say how to answer, because we do that. */
+
+int
+query (ctlstr, arg1, arg2)
+ char *ctlstr;
+{
+ register int answer;
+
+ /* Automatically answer "yes" if input is not from a terminal. */
+ if (!input_from_terminal_p ())
+ return 1;
+
+ while (1)
+ {
+ printf (ctlstr, arg1, arg2);
+ printf ("(y or n) ");
+ fflush (stdout);
+ answer = fgetc (stdin);
+ clearerr (stdin); /* in case of C-d */
+ if (answer != '\n')
+ while (fgetc (stdin) != '\n') clearerr (stdin);
+ if (answer >= 'a')
+ answer -= 040;
+ if (answer == 'Y')
+ return 1;
+ if (answer == 'N')
+ return 0;
+ printf ("Please answer y or n.\n");
+ }
+}
+
+/* Parse a C escape sequence. STRING_PTR points to a variable
+ containing a pointer to the string to parse. That pointer
+ is updated past the characters we use. The value of the
+ escape sequence is returned.
+
+ A negative value means the sequence \ newline was seen,
+ which is supposed to be equivalent to nothing at all.
+
+ If \ is followed by a null character, we return a negative
+ value and leave the string pointer pointing at the null character.
+
+ If \ is followed by 000, we return 0 and leave the string pointer
+ after the zeros. A value of 0 does not mean end of string. */
+
+int
+parse_escape (string_ptr)
+ char **string_ptr;
+{
+ register int c = *(*string_ptr)++;
+ switch (c)
+ {
+ case 'a':
+ return '\a';
+ case 'b':
+ return '\b';
+ case 'e':
+ return 033;
+ case 'f':
+ return '\f';
+ case 'n':
+ return '\n';
+ case 'r':
+ return '\r';
+ case 't':
+ return '\t';
+ case 'v':
+ return '\v';
+ case '\n':
+ return -2;
+ case 0:
+ (*string_ptr)--;
+ return 0;
+ case '^':
+ c = *(*string_ptr)++;
+ if (c == '\\')
+ c = parse_escape (string_ptr);
+ if (c == '?')
+ return 0177;
+ return (c & 0200) | (c & 037);
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ {
+ register int i = c - '0';
+ register int count = 0;
+ while (++count < 3)
+ {
+ if ((c = *(*string_ptr)++) >= '0' && c <= '7')
+ {
+ i *= 8;
+ i += c - '0';
+ }
+ else
+ {
+ (*string_ptr)--;
+ break;
+ }
+ }
+ return i;
+ }
+ default:
+ return c;
+ }
+}
+
+/* Print the character CH on STREAM as part of the contents
+ of a literal string whose delimiter is QUOTER. */
+
+void
+printchar (ch, stream, quoter)
+ unsigned char ch;
+ FILE *stream;
+ int quoter;
+{
+ register int c = ch;
+ if (c < 040 || c >= 0177)
+ switch (c)
+ {
+ case '\n':
+ fputs_filtered ("\\n", stream);
+ break;
+ case '\b':
+ fputs_filtered ("\\b", stream);
+ break;
+ case '\t':
+ fputs_filtered ("\\t", stream);
+ break;
+ case '\f':
+ fputs_filtered ("\\f", stream);
+ break;
+ case '\r':
+ fputs_filtered ("\\r", stream);
+ break;
+ case '\033':
+ fputs_filtered ("\\e", stream);
+ break;
+ case '\007':
+ fputs_filtered ("\\a", stream);
+ break;
+ default:
+ fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
+ break;
+ }
+ else
+ {
+ if (c == '\\' || c == quoter)
+ fputs_filtered ("\\", stream);
+ fprintf_filtered (stream, "%c", c);
+ }
+}
+
+static int lines_per_page, lines_printed, chars_per_line, chars_printed;
+
+/* Set values of page and line size. */
+static void
+set_screensize_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ char *p = arg;
+ char *p1;
+ int tolinesize = lines_per_page;
+ int tocharsize = chars_per_line;
+
+ if (p == 0)
+ error_no_arg ("set screensize");
+
+ while (*p >= '0' && *p <= '9')
+ p++;
+
+ if (*p && *p != ' ' && *p != '\t')
+ error ("Non-integral argument given to \"set screensize\".");
+
+ tolinesize = atoi (arg);
+
+ while (*p == ' ' || *p == '\t')
+ p++;
+
+ if (*p)
+ {
+ p1 = p;
+ while (*p1 >= '0' && *p1 <= '9')
+ p1++;
+
+ if (*p1)
+ error ("Non-integral second argument given to \"set screensize\".");
+
+ tocharsize = atoi (p);
+ }
+
+ lines_per_page = tolinesize;
+ chars_per_line = tocharsize;
+}
+
+static void
+instream_cleanup(stream)
+ FILE *stream;
+{
+ instream = stream;
+}
+
+static void
+prompt_for_continue ()
+{
+ if (ISATTY(stdin) && ISATTY(stdout))
+ {
+ struct cleanup *old_chain = make_cleanup(instream_cleanup, instream);
+ char *cp, *gdb_readline();
+
+ instream = stdin;
+ immediate_quit++;
+ if (cp = gdb_readline ("---Type <return> to continue---"))
+ free(cp);
+ chars_printed = lines_printed = 0;
+ immediate_quit--;
+ do_cleanups(old_chain);
+ }
+}
+
+/* Reinitialize filter; ie. tell it to reset to original values. */
+
+void
+reinitialize_more_filter ()
+{
+ lines_printed = 0;
+ chars_printed = 0;
+}
+
+static void
+screensize_info (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ if (arg)
+ error ("\"info screensize\" does not take any arguments.");
+
+ if (!lines_per_page)
+ printf ("Output more filtering is disabled.\n");
+ else
+ {
+ printf ("Output more filtering is enabled with\n");
+ printf ("%d lines per page and %d characters per line.\n",
+ lines_per_page, chars_per_line);
+ }
+}
+
+/* Like fputs but pause after every screenful.
+ Unlike fputs, fputs_filtered does not return a value.
+ It is OK for LINEBUFFER to be NULL, in which case just don't print
+ anything.
+
+ Note that a longjmp to top level may occur in this routine
+ (since prompt_for_continue may do so) so this routine should not be
+ called when cleanups are not in place. */
+
+void
+fputs_filtered (linebuffer, stream)
+ char *linebuffer;
+ FILE *stream;
+{
+ char *lineptr;
+
+ if (linebuffer == 0)
+ return;
+
+ /* Don't do any filtering if it is disabled. */
+ if (stream != stdout || !ISATTY(stdout) || lines_per_page == 0)
+ {
+ fputs (linebuffer, stream);
+ return;
+ }
+
+ /* Go through and output each character. Show line extension
+ when this is necessary; prompt user for new page when this is
+ necessary. */
+
+ lineptr = linebuffer;
+ while (*lineptr)
+ {
+ /* Possible new page. */
+ if (lines_printed >= lines_per_page - 1)
+ prompt_for_continue ();
+
+ while (*lineptr && *lineptr != '\n')
+ {
+ /* Print a single line. */
+ if (*lineptr == '\t')
+ {
+ putc ('\t', stream);
+ /* Shifting right by 3 produces the number of tab stops
+ we have already passed, and then adding one and
+ shifting left 3 advances to the next tab stop. */
+ chars_printed = ((chars_printed >> 3) + 1) << 3;
+ lineptr++;
+ }
+ else
+ {
+ putc (*lineptr, stream);
+ chars_printed++;
+ lineptr++;
+ }
+
+ if (chars_printed >= chars_per_line)
+ {
+ chars_printed = 0;
+ lines_printed++;
+ /* Possible new page. */
+ if (lines_printed >= lines_per_page - 1)
+ prompt_for_continue ();
+ }
+ }
+
+ if (*lineptr == '\n')
+ {
+ lines_printed++;
+ putc ('\n', stream);
+ lineptr++;
+ chars_printed = 0;
+ }
+ }
+}
+
+/* fputs_demangled is a variant of fputs_filtered that
+ demangles g++ names.*/
+
+void
+fputs_demangled (linebuffer, stream, arg_mode)
+ char *linebuffer;
+ FILE *stream;
+{
+#ifdef __STDC__
+ extern char *cplus_demangle (const char *, int);
+#else
+ extern char *cplus_demangle ();
+#endif
+#define SYMBOL_MAX 1024
+
+#define SYMBOL_CHAR(c) (isascii(c) && (isalnum(c) || (c) == '_' || (c) == '$'))
+
+ char buf[SYMBOL_MAX+1];
+ char *p;
+
+ if (linebuffer == NULL)
+ return;
+
+ p = linebuffer;
+
+ while ( *p != (char) 0 ) {
+ int i = 0;
+
+ /* collect non-interesting characters into buf */
+ while ( *p != (char) 0 && !SYMBOL_CHAR(*p) ) {
+ buf[i++] = *p;
+ p++;
+ }
+ if (i > 0) {
+ /* output the non-interesting characters without demangling */
+ buf[i] = (char) 0;
+ fputs_filtered(buf, stream);
+ i = 0; /* reset buf */
+ }
+
+ /* and now the interesting characters */
+ while (i < SYMBOL_MAX && *p != (char) 0 && SYMBOL_CHAR(*p) ) {
+ buf[i++] = *p;
+ p++;
+ }
+ buf[i] = (char) 0;
+ if (i > 0) {
+ char * result;
+
+ if ( (result = cplus_demangle(buf, arg_mode)) != NULL ) {
+ fputs_filtered(result, stream);
+ free(result);
+ }
+ else {
+ fputs_filtered(buf, stream);
+ }
+ }
+ }
+}
+
+/* Print ARG1, ARG2, and ARG3 on stdout using format FORMAT. If this
+ information is going to put the amount written since the last call
+ to INIIALIZE_MORE_FILTER or the last page break over the page size,
+ print out a pause message and do a gdb_readline to get the users
+ permision to continue.
+
+ Unlike fprintf, this function does not return a value.
+
+ Note that this routine has a restriction that the length of the
+ final output line must be less than 255 characters *or* it must be
+ less than twice the size of the format string. This is a very
+ arbitrary restriction, but it is an internal restriction, so I'll
+ put it in. This means that the %s format specifier is almost
+ useless; unless the caller can GUARANTEE that the string is short
+ enough, fputs_filtered should be used instead.
+
+ Note also that a longjmp to top level may occur in this routine
+ (since prompt_for_continue may do so) so this routine should not be
+ called when cleanups are not in place. */
+
+void
+fprintf_filtered (stream, format, arg1, arg2, arg3, arg4, arg5, arg6)
+ FILE *stream;
+ char *format;
+ int arg1, arg2, arg3, arg4, arg5, arg6;
+{
+ static char *linebuffer = (char *) 0;
+ static int line_size;
+ int format_length = strlen (format);
+ int numchars;
+
+ /* Allocated linebuffer for the first time. */
+ if (!linebuffer)
+ {
+ linebuffer = (char *) xmalloc (255);
+ line_size = 255;
+ }
+
+ /* Reallocate buffer to a larger size if this is necessary. */
+ if (format_length * 2 > line_size)
+ {
+ line_size = format_length * 2;
+
+ /* You don't have to copy. */
+ free (linebuffer);
+ linebuffer = (char *) xmalloc (line_size);
+ }
+
+ /* This won't blow up if the restrictions described above are
+ followed. */
+ (void) sprintf (linebuffer, format, arg1, arg2, arg3, arg4, arg5, arg6);
+
+ fputs_filtered (linebuffer, stream);
+}
+
+void
+printf_filtered (format, arg1, arg2, arg3, arg4, arg5, arg6)
+ char *format;
+ int arg1, arg2, arg3, arg4, arg5, arg6;
+{
+ fprintf_filtered (stdout, format, arg1, arg2, arg3, arg4, arg5, arg6);
+}
+
+/* Print N spaces. */
+void
+print_spaces_filtered (n, stream)
+ int n;
+ FILE *stream;
+{
+ register char *s = (char *) alloca (n + 1);
+ register char *t = s;
+
+ while (n--)
+ *t++ = ' ';
+ *t = '\0';
+
+ fputs_filtered (s, stream);
+}
+
+
+#ifdef USG
+bcopy (from, to, count)
+char *from, *to;
+{
+ memcpy (to, from, count);
+}
+
+bcmp (from, to, count)
+{
+ return (memcmp (to, from, count));
+}
+
+bzero (to, count)
+char *to;
+{
+ while (count--)
+ *to++ = 0;
+}
+
+getwd (buf)
+char *buf;
+{
+ getcwd (buf, MAXPATHLEN);
+}
+
+char *
+index (s, c)
+ char *s;
+{
+ char *strchr ();
+ return strchr (s, c);
+}
+
+char *
+rindex (s, c)
+ char *s;
+{
+ char *strrchr ();
+ return strrchr (s, c);
+}
+
+#ifndef USG
+char *sys_siglist[32] = {
+ "SIG0",
+ "SIGHUP",
+ "SIGINT",
+ "SIGQUIT",
+ "SIGILL",
+ "SIGTRAP",
+ "SIGIOT",
+ "SIGEMT",
+ "SIGFPE",
+ "SIGKILL",
+ "SIGBUS",
+ "SIGSEGV",
+ "SIGSYS",
+ "SIGPIPE",
+ "SIGALRM",
+ "SIGTERM",
+ "SIGUSR1",
+ "SIGUSR2",
+ "SIGCLD",
+ "SIGPWR",
+ "SIGWIND",
+ "SIGPHONE",
+ "SIGPOLL",
+};
+#endif
+
+/* Queue routines */
+
+struct queue {
+ struct queue *forw;
+ struct queue *back;
+};
+
+insque (item, after)
+struct queue *item;
+struct queue *after;
+{
+ item->forw = after->forw;
+ after->forw->back = item;
+
+ item->back = after;
+ after->forw = item;
+}
+
+remque (item)
+struct queue *item;
+{
+ item->forw->back = item->back;
+ item->back->forw = item->forw;
+}
+#endif /* USG */
+
+#ifdef USG
+/* There is too much variation in Sys V signal numbers and names, so
+ we must initialize them at runtime. */
+static char undoc[] = "(undocumented)";
+
+char *sys_siglist[NSIG];
+#endif /* USG */
+
+extern struct cmd_list_element *setlist;
+
+void
+_initialize_utils ()
+{
+ int i;
+ add_cmd ("screensize", class_support, set_screensize_command,
+ "Change gdb's notion of the size of the output screen.\n\
+The first argument is the number of lines on a page.\n\
+The second argument (optional) is the number of characters on a line.",
+ &setlist);
+ add_info ("screensize", screensize_info,
+ "Show gdb's current notion of the size of the output screen.");
+
+ /* These defaults will be used if we are unable to get the correct
+ values from termcap. */
+ lines_per_page = 24;
+ chars_per_line = 80;
+ /* Initialize the screen height and width from termcap. */
+ {
+ int termtype = getenv ("TERM");
+
+ /* Positive means success, nonpositive means failure. */
+ int status;
+
+ /* 2048 is large enough for all known terminals, according to the
+ GNU termcap manual. */
+ char term_buffer[2048];
+
+ if (termtype)
+ {
+ status = tgetent (term_buffer, termtype);
+ if (status > 0)
+ {
+ int val;
+
+ val = tgetnum ("li");
+ if (val >= 0)
+ lines_per_page = val;
+ else
+ /* The number of lines per page is not mentioned
+ in the terminal description. This probably means
+ that paging is not useful (e.g. emacs shell window),
+ so disable paging. */
+ lines_per_page = 0;
+
+ val = tgetnum ("co");
+ if (val >= 0)
+ chars_per_line = val;
+ }
+ }
+ }
+
+#ifdef USG
+ /* Initialize signal names. */
+ for (i = 0; i < NSIG; i++)
+ sys_siglist[i] = undoc;
+
+#ifdef SIGHUP
+ sys_siglist[SIGHUP ] = "SIGHUP";
+#endif
+#ifdef SIGINT
+ sys_siglist[SIGINT ] = "SIGINT";
+#endif
+#ifdef SIGQUIT
+ sys_siglist[SIGQUIT ] = "SIGQUIT";
+#endif
+#ifdef SIGILL
+ sys_siglist[SIGILL ] = "SIGILL";
+#endif
+#ifdef SIGTRAP
+ sys_siglist[SIGTRAP ] = "SIGTRAP";
+#endif
+#ifdef SIGIOT
+ sys_siglist[SIGIOT ] = "SIGIOT";
+#endif
+#ifdef SIGEMT
+ sys_siglist[SIGEMT ] = "SIGEMT";
+#endif
+#ifdef SIGFPE
+ sys_siglist[SIGFPE ] = "SIGFPE";
+#endif
+#ifdef SIGKILL
+ sys_siglist[SIGKILL ] = "SIGKILL";
+#endif
+#ifdef SIGBUS
+ sys_siglist[SIGBUS ] = "SIGBUS";
+#endif
+#ifdef SIGSEGV
+ sys_siglist[SIGSEGV ] = "SIGSEGV";
+#endif
+#ifdef SIGSYS
+ sys_siglist[SIGSYS ] = "SIGSYS";
+#endif
+#ifdef SIGPIPE
+ sys_siglist[SIGPIPE ] = "SIGPIPE";
+#endif
+#ifdef SIGALRM
+ sys_siglist[SIGALRM ] = "SIGALRM";
+#endif
+#ifdef SIGTERM
+ sys_siglist[SIGTERM ] = "SIGTERM";
+#endif
+#ifdef SIGUSR1
+ sys_siglist[SIGUSR1 ] = "SIGUSR1";
+#endif
+#ifdef SIGUSR2
+ sys_siglist[SIGUSR2 ] = "SIGUSR2";
+#endif
+#ifdef SIGCLD
+ sys_siglist[SIGCLD ] = "SIGCLD";
+#endif
+#ifdef SIGCHLD
+ sys_siglist[SIGCHLD ] = "SIGCHLD";
+#endif
+#ifdef SIGPWR
+ sys_siglist[SIGPWR ] = "SIGPWR";
+#endif
+#ifdef SIGTSTP
+ sys_siglist[SIGTSTP ] = "SIGTSTP";
+#endif
+#ifdef SIGTTIN
+ sys_siglist[SIGTTIN ] = "SIGTTIN";
+#endif
+#ifdef SIGTTOU
+ sys_siglist[SIGTTOU ] = "SIGTTOU";
+#endif
+#ifdef SIGSTOP
+ sys_siglist[SIGSTOP ] = "SIGSTOP";
+#endif
+#ifdef SIGXCPU
+ sys_siglist[SIGXCPU ] = "SIGXCPU";
+#endif
+#ifdef SIGXFSZ
+ sys_siglist[SIGXFSZ ] = "SIGXFSZ";
+#endif
+#ifdef SIGVTALRM
+ sys_siglist[SIGVTALRM ] = "SIGVTALRM";
+#endif
+#ifdef SIGPROF
+ sys_siglist[SIGPROF ] = "SIGPROF";
+#endif
+#ifdef SIGWINCH
+ sys_siglist[SIGWINCH ] = "SIGWINCH";
+#endif
+#ifdef SIGCONT
+ sys_siglist[SIGCONT ] = "SIGCONT";
+#endif
+#ifdef SIGURG
+ sys_siglist[SIGURG ] = "SIGURG";
+#endif
+#ifdef SIGIO
+ sys_siglist[SIGIO ] = "SIGIO";
+#endif
+#ifdef SIGWIND
+ sys_siglist[SIGWIND ] = "SIGWIND";
+#endif
+#ifdef SIGPHONE
+ sys_siglist[SIGPHONE ] = "SIGPHONE";
+#endif
+#ifdef SIGPOLL
+ sys_siglist[SIGPOLL ] = "SIGPOLL";
+#endif
+#endif /* USG */
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-01 15:17:14 +0000