1 /* $OpenBSD: ex_edit.c,v 1.5 2009/10/27 23:59:47 deraadt Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1992, 1993, 1994, 1995, 1996 7 * Keith Bostic. All rights reserved. 8 * 9 * See the LICENSE file for redistribution information. 10 */ 11 12 #include "config.h" 13 14 #include <sys/types.h> 15 #include <sys/queue.h> 16 #include <sys/time.h> 17 18 #include <bitstring.h> 19 #include <errno.h> 20 #include <limits.h> 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 25 #include "../common/common.h" 26 #include "../vi/vi.h" 27 28 static int ex_N_edit(SCR *, EXCMD *, FREF *, int); 29 30 /* 31 * ex_edit -- :e[dit][!] [+cmd] [file] 32 * :ex[!] [+cmd] [file] 33 * :vi[sual][!] [+cmd] [file] 34 * 35 * Edit a file; if none specified, re-edit the current file. The third 36 * form of the command can only be executed while in vi mode. See the 37 * hack in ex.c:ex_cmd(). 38 * 39 * !!! 40 * Historic vi didn't permit the '+' command form without specifying 41 * a file name as well. This seems unreasonable, so we support it 42 * regardless. 43 * 44 * PUBLIC: int ex_edit(SCR *, EXCMD *); 45 */ 46 int 47 ex_edit(sp, cmdp) 48 SCR *sp; 49 EXCMD *cmdp; 50 { 51 FREF *frp; 52 int attach, setalt; 53 54 switch (cmdp->argc) { 55 case 0: 56 /* 57 * If the name has been changed, we edit that file, not the 58 * original name. If the user was editing a temporary file 59 * (or wasn't editing any file), create another one. The 60 * reason for not reusing temporary files is that there is 61 * special exit processing of them, and reuse is tricky. 62 */ 63 frp = sp->frp; 64 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) { 65 if ((frp = file_add(sp, NULL)) == NULL) 66 return (1); 67 attach = 0; 68 } else 69 attach = 1; 70 setalt = 0; 71 break; 72 case 1: 73 if ((frp = file_add(sp, cmdp->argv[0]->bp)) == NULL) 74 return (1); 75 attach = 0; 76 setalt = 1; 77 set_alt_name(sp, cmdp->argv[0]->bp); 78 break; 79 default: 80 abort(); 81 } 82 83 if (F_ISSET(cmdp, E_NEWSCREEN)) 84 return (ex_N_edit(sp, cmdp, frp, attach)); 85 86 /* 87 * Check for modifications. 88 * 89 * !!! 90 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit. 91 */ 92 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE))) 93 return (1); 94 95 /* Switch files. */ 96 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) | 97 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) 98 return (1); 99 100 F_SET(sp, SC_FSWITCH); 101 return (0); 102 } 103 104 /* 105 * ex_N_edit -- 106 * New screen version of ex_edit. 107 */ 108 static int 109 ex_N_edit(sp, cmdp, frp, attach) 110 SCR *sp; 111 EXCMD *cmdp; 112 FREF *frp; 113 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 (vs_split(sp, new, 0)) { 121 (void)screen_end(new); 122 return (1); 123 } 124 125 /* Get a backing file. */ 126 if (attach) { 127 /* Copy file state, keep the screen and cursor the same. */ 128 new->ep = sp->ep; 129 ++new->ep->refcnt; 130 131 new->frp = frp; 132 new->frp->flags = sp->frp->flags; 133 134 new->lno = sp->lno; 135 new->cno = sp->cno; 136 } else if (file_init(new, frp, NULL, 137 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) { 138 (void)vs_discard(new, NULL); 139 (void)screen_end(new); 140 return (1); 141 } 142 143 /* Create the argument list. */ 144 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name); 145 146 /* Set up the switch. */ 147 sp->nextdisp = new; 148 F_SET(sp, SC_SSWITCH); 149 150 return (0); 151 } 152