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README.signal
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cl.h
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cl_funcs.c
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cl_main.c
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cl_read.c
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cl_screen.c
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cl_term.c
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extern.h
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Editing: cl_term.c
/*- * Copyright (c) 1993, 1994 * The Regents of the University of California. All rights reserved. * Copyright (c) 1993, 1994, 1995, 1996 * Keith Bostic. All rights reserved. * * See the LICENSE file for redistribution information. */ #include "config.h" #include <sys/types.h> #include <sys/ioctl.h> #include <sys/queue.h> #include <sys/stat.h> #include <bitstring.h> #include <errno.h> #include <limits.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #ifdef HAVE_TERM_H #include <term.h> #endif #include <termios.h> #include <unistd.h> #include "../common/common.h" #include "cl.h" static int cl_pfmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t); static size_t atoz_or(const char *, size_t); /* * XXX * THIS REQUIRES THAT ALL SCREENS SHARE A TERMINAL TYPE. */ typedef struct _tklist { char *ts; /* Key's termcap string. */ char *output; /* Corresponding vi command. */ char *name; /* Name. */ u_char value; /* Special value (for lookup). */ } TKLIST; static TKLIST const c_tklist[] = { /* Command mappings. */ {"kil1", "O", "insert line"}, {"kdch1", "x", "delete character"}, {"kcud1", "j", "cursor down"}, {"kel", "D", "delete to eol"}, {"kind", "\004", "scroll down"}, /* ^D */ {"kll", "$", "go to eol"}, {"kend", "$", "go to eol"}, {"khome", "^", "go to sol"}, {"kich1", "i", "insert at cursor"}, {"kdl1", "dd", "delete line"}, {"kcub1", "h", "cursor left"}, {"knp", "\006", "page down"}, /* ^F */ {"kpp", "\002", "page up"}, /* ^B */ {"kri", "\025", "scroll up"}, /* ^U */ {"ked", "dG", "delete to end of screen"}, {"kcuf1", "l", "cursor right"}, {"kcuu1", "k", "cursor up"}, {NULL}, }; static TKLIST const m1_tklist[] = { /* Input mappings (lookup). */ {NULL}, }; static TKLIST const m2_tklist[] = { /* Input mappings (set or delete). */ {"kcud1", "\033ja", "cursor down"}, /* ^[ja */ {"kcub1", "\033ha", "cursor left"}, /* ^[ha */ {"kcuu1", "\033ka", "cursor up"}, /* ^[ka */ {"kcuf1", "\033la", "cursor right"}, /* ^[la */ {NULL}, }; /* * cl_term_init -- * Initialize the special keys defined by the termcap/terminfo entry. * * PUBLIC: int cl_term_init(SCR *); */ int cl_term_init(SCR *sp) { KEYLIST *kp; SEQ *qp; TKLIST const *tkp; char *t; CHAR_T name[60]; CHAR_T output[5]; CHAR_T ts[20]; CHAR_T *wp; size_t wlen; /* Command mappings. */ for (tkp = c_tklist; tkp->name != NULL; ++tkp) { if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1) continue; CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen); MEMCPY(name, wp, wlen); CHAR2INT(sp, t, strlen(t), wp, wlen); MEMCPY(ts, wp, wlen); CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen); MEMCPY(output, wp, wlen); if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t), output, strlen(tkp->output), SEQ_COMMAND, SEQ_NOOVERWRITE | SEQ_SCREEN)) return (1); } /* Input mappings needing to be looked up. */ for (tkp = m1_tklist; tkp->name != NULL; ++tkp) { if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1) continue; for (kp = keylist;; ++kp) if (kp->value == tkp->value) break; if (kp == NULL) continue; CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen); MEMCPY(name, wp, wlen); CHAR2INT(sp, t, strlen(t), wp, wlen); MEMCPY(ts, wp, wlen); output[0] = (UCHAR_T)kp->ch; if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t), output, 1, SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN)) return (1); } /* Input mappings that are already set or are text deletions. */ for (tkp = m2_tklist; tkp->name != NULL; ++tkp) { if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1) continue; /* * !!! * Some terminals' <cursor_left> keys send single <backspace> * characters. This is okay in command mapping, but not okay * in input mapping. That combination is the only one we'll * ever see, hopefully, so kluge it here for now. */ if (!strcmp(t, "\b")) continue; if (tkp->output == NULL) { CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen); MEMCPY(name, wp, wlen); CHAR2INT(sp, t, strlen(t), wp, wlen); MEMCPY(ts, wp, wlen); if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t), NULL, 0, SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN)) return (1); } else { CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen); MEMCPY(name, wp, wlen); CHAR2INT(sp, t, strlen(t), wp, wlen); MEMCPY(ts, wp, wlen); CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen); MEMCPY(output, wp, wlen); if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t), output, strlen(tkp->output), SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN)) return (1); } } /* * Rework any function key mappings that were set before the * screen was initialized. */ SLIST_FOREACH(qp, sp->gp->seqq, q) if (F_ISSET(qp, SEQ_FUNCMAP)) (void)cl_pfmap(sp, qp->stype, qp->input, qp->ilen, qp->output, qp->olen); return (0); } /* * cl_term_end -- * End the special keys defined by the termcap/terminfo entry. * * PUBLIC: int cl_term_end(GS *); */ int cl_term_end(GS *gp) { SEQ *qp, *nqp, *pre_qp = NULL; /* Delete screen specific mappings. */ SLIST_FOREACH_SAFE(qp, gp->seqq, q, nqp) if (F_ISSET(qp, SEQ_SCREEN)) { if (qp == SLIST_FIRST(gp->seqq)) SLIST_REMOVE_HEAD(gp->seqq, q); else SLIST_REMOVE_AFTER(pre_qp, q); (void)seq_free(qp); } else pre_qp = qp; return (0); } /* * cl_fmap -- * Map a function key. * * PUBLIC: int cl_fmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t); */ int cl_fmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen) { /* Ignore until the screen is running, do the real work then. */ if (F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_SCR_VI)) return (0); if (F_ISSET(sp, SC_EX) && !F_ISSET(sp, SC_SCR_EX)) return (0); return (cl_pfmap(sp, stype, from, flen, to, tlen)); } /* * cl_pfmap -- * Map a function key (private version). */ static int cl_pfmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen) { size_t nlen; char *p; char name[64]; CHAR_T keyname[64]; CHAR_T ts[20]; CHAR_T *wp; size_t wlen; (void)snprintf(name, sizeof(name), "kf%d", (int)STRTOL(from+1,NULL,10)); if ((p = tigetstr(name)) == NULL || p == (char *)-1 || strlen(p) == 0) p = NULL; if (p == NULL) { msgq_wstr(sp, M_ERR, from, "233|This terminal has no %s key"); return (1); } nlen = SPRINTF(keyname, SIZE(keyname), L("function key %d"), (int)STRTOL(from+1,NULL,10)); CHAR2INT(sp, p, strlen(p), wp, wlen); MEMCPY(ts, wp, wlen); return (seq_set(sp, keyname, nlen, ts, strlen(p), to, tlen, stype, SEQ_NOOVERWRITE | SEQ_SCREEN)); } /* * cl_optchange -- * Curses screen specific "option changed" routine. * * PUBLIC: int cl_optchange(SCR *, int, char *, u_long *); */ int cl_optchange(SCR *sp, int opt, char *str, u_long *valp) { CL_PRIVATE *clp; clp = CLP(sp); switch (opt) { case O_TERM: F_CLR(sp, SC_SCR_EX | SC_SCR_VI); /* FALLTHROUGH */ case O_COLUMNS: case O_LINES: /* * Changing the terminal type requires that we reinitialize * curses, while resizing does not. */ F_SET(sp->gp, G_SRESTART); break; case O_MESG: (void)cl_omesg(sp, clp, *valp); break; case O_WINDOWNAME: if (*valp) { F_SET(clp, CL_RENAME_OK); /* * If the screen is live, i.e. we're not reading the * .exrc file, update the window. */ if (sp->frp != NULL && sp->frp->name != NULL) (void)cl_rename(sp, sp->frp->name, 1); } else { F_CLR(clp, CL_RENAME_OK); (void)cl_rename(sp, NULL, 0); } break; } return (0); } /* * cl_omesg -- * Turn the tty write permission on or off. * * PUBLIC: int cl_omesg(SCR *, CL_PRIVATE *, int); */ int cl_omesg(SCR *sp, CL_PRIVATE *clp, int on) { struct stat sb; char *tty; /* Find the tty, get the current permissions. */ if ((tty = ttyname(STDERR_FILENO)) == NULL) { if (sp != NULL) msgq(sp, M_SYSERR, "stderr"); return (1); } if (stat(tty, &sb) < 0) { if (sp != NULL) msgq(sp, M_SYSERR, "%s", tty); return (1); } /* Save the original status if it's unknown. */ if (clp->tgw == TGW_UNKNOWN) clp->tgw = sb.st_mode & S_IWGRP ? TGW_SET : TGW_UNSET; /* Toggle the permissions. */ if (on) { if (chmod(tty, sb.st_mode | S_IWGRP) < 0) { if (sp != NULL) msgq(sp, M_SYSERR, "046|messages not turned on: %s", tty); return (1); } } else if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0) { if (sp != NULL) msgq(sp, M_SYSERR, "045|messages not turned off: %s", tty); return (1); } return (0); } /* * cl_ssize -- * Return the terminal size. * * PUBLIC: int cl_ssize(SCR *, int, size_t *, size_t *, int *); */ int cl_ssize(SCR *sp, int sigwinch, size_t *rowp, size_t *colp, int *changedp) { struct winsize win; size_t col, row; int rval; char *p; /* Assume it's changed. */ if (changedp != NULL) *changedp = 1; /* * !!! * sp may be NULL. * * Get the screen rows and columns. If the values are wrong, it's * not a big deal -- as soon as the user sets them explicitly the * environment will be set and the screen package will use the new * values. * * Try TIOCGWINSZ. */ row = col = 0; if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1) { row = win.ws_row; col = win.ws_col; } /* If here because of suspend or a signal, only trust TIOCGWINSZ. */ if (sigwinch) { /* * Somebody didn't get TIOCGWINSZ right, or has suspend * without window resizing support. The user just lost, * but there's nothing we can do. */ if (row == 0 || col == 0) { if (changedp != NULL) *changedp = 0; return (0); } /* * SunOS systems deliver SIGWINCH when windows are uncovered * as well as when they change size. In addition, we call * here when continuing after being suspended since the window * may have changed size. Since we don't want to background * all of the screens just because the window was uncovered, * ignore the signal if there's no change. */ if (sp != NULL && row == O_VAL(sp, O_LINES) && col == O_VAL(sp, O_COLUMNS)) { if (changedp != NULL) *changedp = 0; return (0); } if (rowp != NULL) *rowp = row; if (colp != NULL) *colp = col; return (0); } /* * !!! * If TIOCGWINSZ failed, or had entries of 0, try termcap. This * routine is called before any termcap or terminal information * has been set up. If there's no TERM environmental variable set, * let it go, at least ex can run. */ if (row == 0 || col == 0) { if ((p = getenv("TERM")) == NULL) goto noterm; if (row == 0) { if ((rval = tigetnum("lines")) < 0) msgq(sp, M_SYSERR, "tigetnum: lines"); else row = rval; } if (col == 0) { if ((rval = tigetnum("cols")) < 0) msgq(sp, M_SYSERR, "tigetnum: cols"); else col = rval; } } /* If nothing else, well, it's probably a VT100. */ noterm: if (row == 0) row = 24; if (col == 0) col = 80; /* * !!! * POSIX 1003.2 requires the environment to override everything. * Often, people can get nvi to stop messing up their screen by * deleting the LINES and COLUMNS environment variables from their * dot-files. */ if ((p = getenv("LINES")) != NULL) row = atoz_or(p, row); if ((p = getenv("COLUMNS")) != NULL) col = atoz_or(p, col); if (rowp != NULL) *rowp = row; if (colp != NULL) *colp = col; return (0); } /* * atoz_or -- * Parse non-zero positive decimal with a fallback. */ static size_t atoz_or(const char *s, size_t y) { char *ep; long x = strtol(s, &ep, 10); if (*ep == '\0' && (0 < x && x < INT_MAX)) return (size_t)x; else return y; } /* * cl_putchar -- * Function version of putchar, for tputs. * * PUBLIC: int cl_putchar(int); */ int cl_putchar(int ch) { return (putchar(ch)); }
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