1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "@(#)ex_edit.c 10.10 (Berkeley) 4/27/96"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <errno.h> 22 #include <limits.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 27 #include "../common/common.h" 28 #include "../vi/vi.h" 29 30 static int ex_N_edit __P((SCR *, EXCMD *, FREF *, int)); 31 32 /* 33 * ex_edit -- :e[dit][!] [+cmd] [file] 34 * :ex[!] [+cmd] [file] 35 * :vi[sual][!] [+cmd] [file] 36 * 37 * Edit a file; if none specified, re-edit the current file. The third 38 * form of the command can only be executed while in vi mode. See the 39 * hack in ex.c:ex_cmd(). 40 * 41 * !!! 42 * Historic vi didn't permit the '+' command form without specifying 43 * a file name as well. This seems unreasonable, so we support it 44 * regardless. 45 * 46 * PUBLIC: int ex_edit __P((SCR *, EXCMD *)); 47 */ 48 int 49 ex_edit(sp, cmdp) 50 SCR *sp; 51 EXCMD *cmdp; 52 { 53 FREF *frp; 54 int attach, setalt; 55 56 switch (cmdp->argc) { 57 case 0: 58 /* 59 * If the name has been changed, we edit that file, not the 60 * original name. If the user was editing a temporary file 61 * (or wasn't editing any file), create another one. The 62 * reason for not reusing temporary files is that there is 63 * special exit processing of them, and reuse is tricky. 64 */ 65 frp = sp->frp; 66 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) { 67 if ((frp = file_add(sp, NULL)) == NULL) 68 return (1); 69 attach = 0; 70 } else 71 attach = 1; 72 setalt = 0; 73 break; 74 case 1: 75 if ((frp = file_add(sp, cmdp->argv[0]->bp)) == NULL) 76 return (1); 77 attach = 0; 78 setalt = 1; 79 set_alt_name(sp, cmdp->argv[0]->bp); 80 break; 81 default: 82 abort(); 83 } 84 85 if (F_ISSET(cmdp, E_NEWSCREEN)) 86 return (ex_N_edit(sp, cmdp, frp, attach)); 87 88 /* 89 * Check for modifications. 90 * 91 * !!! 92 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit. 93 */ 94 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE))) 95 return (1); 96 97 /* Switch files. */ 98 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) | 99 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) 100 return (1); 101 102 F_SET(sp, SC_FSWITCH); 103 return (0); 104 } 105 106 /* 107 * ex_N_edit -- 108 * New screen version of ex_edit. 109 */ 110 static int 111 ex_N_edit(sp, cmdp, frp, attach) 112 SCR *sp; 113 EXCMD *cmdp; 114 FREF *frp; 115 int attach; 116 { 117 SCR *new; 118 119 /* Get a new screen. */ 120 if (screen_init(sp->gp, sp, &new)) 121 return (1); 122 if (vs_split(sp, new, 0)) { 123 (void)screen_end(new); 124 return (1); 125 } 126 127 /* Get a backing file. */ 128 if (attach) { 129 /* Copy file state, keep the screen and cursor the same. */ 130 new->ep = sp->ep; 131 ++new->ep->refcnt; 132 133 new->frp = frp; 134 new->frp->flags = sp->frp->flags; 135 136 new->lno = sp->lno; 137 new->cno = sp->cno; 138 } else if (file_init(new, frp, NULL, 139 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) { 140 (void)vs_discard(new, NULL); 141 (void)screen_end(new); 142 return (1); 143 } 144 145 /* Create the argument list. */ 146 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name); 147 148 /* Set up the switch. */ 149 sp->nextdisp = new; 150 F_SET(sp, SC_SSWITCH); 151 152 return (0); 153 } 154