2 * Copyright (c) 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid
[] = "$Id: cl_main.c,v 10.54 2001/07/29 19:07:27 skimo Exp $ (Berkeley) $Date: 2001/07/29 19:07:27 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
19 #include <bitstring.h>
29 #include "../common/common.h"
30 #include "../ip/extern.h"
32 #include "pathnames.h"
34 GS
*__global_list
; /* GLOBAL: List of screens. */
35 sigset_t __sigblockset
; /* GLOBAL: Blocked signals. */
37 static void cl_func_std
__P((WIN
*));
38 static void cl_end
__P((CL_PRIVATE
*));
39 static CL_PRIVATE
*cl_init
__P((WIN
*));
40 static void perr
__P((char *, char *));
41 static int setsig
__P((int, struct sigaction
*, void (*)(int)));
42 static void sig_end
__P((GS
*));
43 static void term_init
__P((char *, char *));
47 * This is the main loop for the standalone curses editor.
50 main(int argc
, char **argv
)
58 char **p_av
, **t_av
, *ttype
;
60 /* If loaded at 0 and jumping through a NULL pointer, stop. */
64 /* Create and initialize the global structure. */
65 __global_list
= gp
= gs_init(argv
[0]);
68 * Strip out any arguments that vi isn't going to understand. There's
69 * no way to portably call getopt twice, so arguments parsed here must
70 * be removed from the argument list.
72 for (p_av
= t_av
= argv
;;) {
77 if (!strcmp(*t_av
, "--")) {
78 while ((*p_av
++ = *t_av
++) != NULL
);
84 /* Create new window */
87 /* Create and initialize the CL_PRIVATE structure. */
91 * Initialize the terminal information.
93 * We have to know what terminal it is from the start, since we may
94 * have to use termcap/terminfo to find out how big the screen is.
96 if ((ttype
= getenv("TERM")) == NULL
)
98 term_init(gp
->progname
, ttype
);
100 /* Add the terminal type to the global structure. */
101 if ((OG_D_STR(gp
, GO_TERM
) =
102 OG_STR(gp
, GO_TERM
) = strdup(ttype
)) == NULL
)
103 perr(gp
->progname
, NULL
);
105 /* Figure out how big the screen is. */
106 if (cl_ssize(NULL
, 0, &rows
, &cols
, NULL
))
109 /* Add the rows and columns to the global structure. */
110 OG_VAL(gp
, GO_LINES
) = OG_D_VAL(gp
, GO_LINES
) = rows
;
111 OG_VAL(gp
, GO_COLUMNS
) = OG_D_VAL(gp
, GO_COLUMNS
) = cols
;
113 /* Ex wants stdout to be buffered. */
114 (void)setvbuf(stdout
, NULL
, _IOFBF
, 0);
116 /* Start catching signals. */
117 if (sig_init(gp
, NULL
))
121 rval
= editor(wp
, argc
, argv
);
123 /* Clean out the global structure. */
126 /* Clean up signals. */
129 /* Clean up the terminal. */
134 * Reset the O_MESG option.
136 if (clp
->tgw
!= TGW_UNKNOWN
)
137 (void)cl_omesg(NULL
, clp
, clp
->tgw
== TGW_SET
);
141 * Reset the X11 xterm icon/window name.
143 if (F_ISSET(clp
, CL_RENAME
))
144 cl_setname(gp
, clp
->oname
);
146 /* If a killer signal arrived, pretend we just got it. */
147 if (clp
->killersig
) {
148 (void)signal(clp
->killersig
, SIG_DFL
);
149 (void)kill(getpid(), clp
->killersig
);
153 /* Free the global and CL private areas. */
154 #if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY)
164 * Create and partially initialize the CL structure.
175 /* Allocate the CL private structure. */
176 CALLOC_NOMSG(NULL
, clp
, CL_PRIVATE
*, 1, sizeof(CL_PRIVATE
));
178 perr(gp
->progname
, NULL
);
179 gp
->cl_private
= clp
;
182 * Set the CL_STDIN_TTY flag. It's purpose is to avoid setting
183 * and resetting the tty if the input isn't from there. We also
184 * use the same test to determine if we're running a script or
187 if (isatty(STDIN_FILENO
))
188 F_SET(clp
, CL_STDIN_TTY
);
190 F_SET(gp
, G_SCRIPTED
);
193 * We expect that if we've lost our controlling terminal that the
194 * open() (but not the tcgetattr()) will fail.
196 if (F_ISSET(clp
, CL_STDIN_TTY
)) {
197 if (tcgetattr(STDIN_FILENO
, &clp
->orig
) == -1)
199 } else if ((fd
= open(_PATH_TTY
, O_RDONLY
, 0)) != -1) {
200 if (tcgetattr(fd
, &clp
->orig
) == -1) {
201 tcfail
: perr(gp
->progname
, "tcgetattr");
207 /* Initialize the list of curses functions. */
215 * Discard the CL structure.
218 cl_end(CL_PRIVATE
*clp
)
220 if (clp
->oname
!= NULL
)
227 * Initialize terminal information.
230 term_init(char *name
, char *ttype
)
234 /* Set up the terminal database information. */
235 setupterm(ttype
, STDOUT_FILENO
, &err
);
238 (void)fprintf(stderr
,
239 "%s: No terminal database found\n", name
);
242 (void)fprintf(stderr
,
243 "%s: %s: unknown terminal type\n", name
, ttype
);
249 CL_PRIVATE *clp = GCLP(__global_list);
255 F_SET(clp
, CL_SIGHUP
);
256 clp
->killersig
= SIGHUP
;
264 F_SET(clp
, CL_SIGINT
);
272 F_SET(clp
, CL_SIGTERM
);
273 clp
->killersig
= SIGTERM
;
281 F_SET(clp
, CL_SIGWINCH
);
287 * Initialize signals.
289 * PUBLIC: int sig_init __P((GS *, SCR *));
292 sig_init(GS
*gp
, SCR
*sp
)
299 (void)sigemptyset(&__sigblockset
);
300 if (sigaddset(&__sigblockset
, SIGHUP
) ||
301 setsig(SIGHUP
, &clp
->oact
[INDX_HUP
], h_hup
) ||
302 sigaddset(&__sigblockset
, SIGINT
) ||
303 setsig(SIGINT
, &clp
->oact
[INDX_INT
], h_int
) ||
304 sigaddset(&__sigblockset
, SIGTERM
) ||
305 setsig(SIGTERM
, &clp
->oact
[INDX_TERM
], h_term
)
308 sigaddset(&__sigblockset
, SIGWINCH
) ||
309 setsig(SIGWINCH
, &clp
->oact
[INDX_WINCH
], h_winch
)
312 perr(gp
->progname
, NULL
);
316 if (setsig(SIGHUP
, NULL
, h_hup
) ||
317 setsig(SIGINT
, NULL
, h_int
) ||
318 setsig(SIGTERM
, NULL
, h_term
)
321 setsig(SIGWINCH
, NULL
, h_winch
)
324 msgq(sp
, M_SYSERR
, "signal-reset");
331 * Set a signal handler.
334 setsig(int signo
, struct sigaction
*oactp
, void (*handler
) (int))
336 struct sigaction act
;
339 * Use sigaction(2), not signal(3), since we don't always want to
340 * restart system calls. The example is when waiting for a command
341 * mode keystroke and SIGWINCH arrives. Besides, you can't portably
342 * restart system calls (thanks, POSIX!). On the other hand, you
343 * can't portably NOT restart system calls (thanks, Sun!). SunOS
344 * used SA_INTERRUPT as their extension to NOT restart read calls.
345 * We sure hope nobody else used it for anything else. Mom told me
346 * there'd be days like this. She just never told me that there'd
349 act
.sa_handler
= handler
;
350 sigemptyset(&act
.sa_mask
);
353 act
.sa_flags
= SA_INTERRUPT
;
357 return (sigaction(signo
, &act
, oactp
));
370 (void)sigaction(SIGHUP
, NULL
, &clp
->oact
[INDX_HUP
]);
371 (void)sigaction(SIGINT
, NULL
, &clp
->oact
[INDX_INT
]);
372 (void)sigaction(SIGTERM
, NULL
, &clp
->oact
[INDX_TERM
]);
374 (void)sigaction(SIGWINCH
, NULL
, &clp
->oact
[INDX_WINCH
]);
380 * Initialize the standard curses functions.
389 gp
->scr_addstr
= cl_addstr
;
390 gp
->scr_waddstr
= cl_waddstr
;
391 gp
->scr_attr
= cl_attr
;
392 gp
->scr_baud
= cl_baud
;
393 gp
->scr_bell
= cl_bell
;
395 gp
->scr_child
= NULL
;
396 gp
->scr_clrtoeol
= cl_clrtoeol
;
397 gp
->scr_cursor
= cl_cursor
;
398 gp
->scr_deleteln
= cl_deleteln
;
399 gp
->scr_reply
= NULL
;
400 gp
->scr_discard
= cl_discard
;
401 gp
->scr_event
= cl_event
;
402 gp
->scr_ex_adjust
= cl_ex_adjust
;
403 gp
->scr_fmap
= cl_fmap
;
404 gp
->scr_insertln
= cl_insertln
;
405 gp
->scr_keyval
= cl_keyval
;
406 gp
->scr_move
= cl_move
;
408 gp
->scr_optchange
= cl_optchange
;
409 gp
->scr_refresh
= cl_refresh
;
410 gp
->scr_rename
= cl_rename
;
411 gp
->scr_screen
= cl_screen
;
412 gp
->scr_split
= cl_split
;
413 gp
->scr_suspend
= cl_suspend
;
414 gp
->scr_usage
= cl_usage
;
419 * Print system error.
422 perr(char *name
, char *msg
)
424 (void)fprintf(stderr
, "%s:", name
);
426 (void)fprintf(stderr
, "%s:", msg
);
427 (void)fprintf(stderr
, "%s\n", strerror(errno
));