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[] = "$Id: ex_edit.c,v 10.15 2011/12/22 23:26:50 zy Exp $"; 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(SCR *sp, EXCMD *cmdp) 50 { 51 FREF *frp; 52 int attach, setalt; 53 char *np; 54 size_t nlen; 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 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, 76 np, nlen); 77 if ((frp = file_add(sp, np)) == NULL) 78 return (1); 79 attach = 0; 80 setalt = 1; 81 set_alt_name(sp, np); 82 break; 83 default: 84 abort(); 85 } 86 87 if (F_ISSET(cmdp, E_NEWSCREEN) || cmdp->cmd == &cmds[C_VSPLIT]) 88 return (ex_N_edit(sp, cmdp, frp, attach)); 89 90 /* 91 * Check for modifications. 92 * 93 * !!! 94 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit. 95 */ 96 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE))) 97 return (1); 98 99 /* Switch files. */ 100 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) | 101 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) 102 return (1); 103 104 F_SET(sp, SC_FSWITCH); 105 return (0); 106 } 107 108 /* 109 * ex_N_edit -- 110 * New screen version of ex_edit. 111 */ 112 static int 113 ex_N_edit(SCR *sp, EXCMD *cmdp, FREF *frp, int attach) 114 { 115 SCR *new; 116 117 /* Get a new screen. */ 118 if (screen_init(sp->gp, sp, &new)) 119 return (1); 120 if ((cmdp->cmd == &cmds[C_VSPLIT] && vs_vsplit(sp, new)) || 121 (cmdp->cmd != &cmds[C_VSPLIT] && vs_split(sp, new, 0))) { 122 (void)screen_end(new); 123 return (1); 124 } 125 126 /* Get a backing file. */ 127 if (attach) { 128 /* Copy file state, keep the screen and cursor the same. */ 129 new->ep = sp->ep; 130 ++new->ep->refcnt; 131 132 new->frp = frp; 133 new->frp->flags = sp->frp->flags; 134 135 new->lno = sp->lno; 136 new->cno = sp->cno; 137 138 #if defined(USE_WIDECHAR) && defined(USE_ICONV) 139 /* Synchronize the iconv environments. */ 140 o_set(new, O_FILEENCODING, OS_STRDUP, 141 O_STR(sp, O_FILEENCODING), 0); 142 conv_enc(new, O_FILEENCODING, 0); 143 #endif 144 } else if (file_init(new, frp, NULL, 145 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) { 146 (void)vs_discard(new, NULL); 147 (void)screen_end(new); 148 return (1); 149 } 150 151 /* Create the argument list. */ 152 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name); 153 154 /* Set up the switch. */ 155 sp->nextdisp = new; 156 F_SET(sp, SC_SSWITCH); 157 158 return (0); 159 } 160