1 /* $OpenBSD: ex_edit.c,v 1.6 2014/11/12 04:28:41 bentley 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(SCR *sp, EXCMD *cmdp) 48 { 49 FREF *frp; 50 int attach, setalt; 51 52 switch (cmdp->argc) { 53 case 0: 54 /* 55 * If the name has been changed, we edit that file, not the 56 * original name. If the user was editing a temporary file 57 * (or wasn't editing any file), create another one. The 58 * reason for not reusing temporary files is that there is 59 * special exit processing of them, and reuse is tricky. 60 */ 61 frp = sp->frp; 62 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) { 63 if ((frp = file_add(sp, NULL)) == NULL) 64 return (1); 65 attach = 0; 66 } else 67 attach = 1; 68 setalt = 0; 69 break; 70 case 1: 71 if ((frp = file_add(sp, cmdp->argv[0]->bp)) == NULL) 72 return (1); 73 attach = 0; 74 setalt = 1; 75 set_alt_name(sp, cmdp->argv[0]->bp); 76 break; 77 default: 78 abort(); 79 } 80 81 if (F_ISSET(cmdp, E_NEWSCREEN)) 82 return (ex_N_edit(sp, cmdp, frp, attach)); 83 84 /* 85 * Check for modifications. 86 * 87 * !!! 88 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit. 89 */ 90 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE))) 91 return (1); 92 93 /* Switch files. */ 94 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) | 95 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) 96 return (1); 97 98 F_SET(sp, SC_FSWITCH); 99 return (0); 100 } 101 102 /* 103 * ex_N_edit -- 104 * New screen version of ex_edit. 105 */ 106 static int 107 ex_N_edit(SCR *sp, EXCMD *cmdp, FREF *frp, int attach) 108 { 109 SCR *new; 110 111 /* Get a new screen. */ 112 if (screen_init(sp->gp, sp, &new)) 113 return (1); 114 if (vs_split(sp, new, 0)) { 115 (void)screen_end(new); 116 return (1); 117 } 118 119 /* Get a backing file. */ 120 if (attach) { 121 /* Copy file state, keep the screen and cursor the same. */ 122 new->ep = sp->ep; 123 ++new->ep->refcnt; 124 125 new->frp = frp; 126 new->frp->flags = sp->frp->flags; 127 128 new->lno = sp->lno; 129 new->cno = sp->cno; 130 } else if (file_init(new, frp, NULL, 131 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) { 132 (void)vs_discard(new, NULL); 133 (void)screen_end(new); 134 return (1); 135 } 136 137 /* Create the argument list. */ 138 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name); 139 140 /* Set up the switch. */ 141 sp->nextdisp = new; 142 F_SET(sp, SC_SSWITCH); 143 144 return (0); 145 } 146