1 /* $NetBSD: edit.c,v 1.11 2002/03/04 03:07:25 wiz Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)edit.c 8.1 (Berkeley) 6/6/93"; 40 #else 41 __RCSID("$NetBSD: edit.c,v 1.11 2002/03/04 03:07:25 wiz Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include "rcv.h" 46 #include "extern.h" 47 48 /* 49 * Mail -- a mail program 50 * 51 * Perform message editing functions. 52 */ 53 extern char *tempEdit; 54 55 /* 56 * Edit a message list. 57 */ 58 int 59 editor(void *v) 60 { 61 int *msgvec = v; 62 63 return edit1(msgvec, 'e'); 64 } 65 66 /* 67 * Invoke the visual editor on a message list. 68 */ 69 int 70 visual(void *v) 71 { 72 int *msgvec = v; 73 74 return edit1(msgvec, 'v'); 75 } 76 77 /* 78 * Edit a message by writing the message into a funnily-named file 79 * (which should not exist) and forking an editor on it. 80 * We get the editor from the stuff above. 81 */ 82 int 83 edit1(int *msgvec, int editortype) 84 { 85 int c; 86 int i; 87 FILE *fp; 88 struct message *mp; 89 off_t size; 90 91 /* 92 * Deal with each message to be edited . . . 93 */ 94 for (i = 0; msgvec[i] && i < msgCount; i++) { 95 sig_t sigint; 96 97 if (i > 0) { 98 char buf[100]; 99 char *p; 100 101 printf("Edit message %d [ynq]? ", msgvec[i]); 102 if (fgets(buf, sizeof buf, stdin) == 0) 103 break; 104 for (p = buf; *p == ' ' || *p == '\t'; p++) 105 ; 106 if (*p == 'q') 107 break; 108 if (*p == 'n') 109 continue; 110 } 111 dot = mp = &message[msgvec[i] - 1]; 112 touch(mp); 113 sigint = signal(SIGINT, SIG_IGN); 114 fp = run_editor(setinput(mp), mp->m_size, editortype, 115 readonly); 116 if (fp != NULL) { 117 (void) fseek(otf, 0L, 2); 118 size = ftell(otf); 119 mp->m_block = blockof(size); 120 mp->m_offset = offsetof(size); 121 mp->m_size = fsize(fp); 122 mp->m_lines = 0; 123 mp->m_flag |= MODIFY; 124 rewind(fp); 125 while ((c = getc(fp)) != EOF) { 126 if (c == '\n') 127 mp->m_lines++; 128 if (putc(c, otf) == EOF) 129 break; 130 } 131 if (ferror(otf)) 132 perror("/tmp"); 133 (void) Fclose(fp); 134 } 135 (void) signal(SIGINT, sigint); 136 } 137 return 0; 138 } 139 140 /* 141 * Run an editor on the file at "fpp" of "size" bytes, 142 * and return a new file pointer. 143 * Signals must be handled by the caller. 144 * "Editortype" is 'e' for _PATH_EX, 'v' for _PATH_VI. 145 */ 146 FILE * 147 run_editor(FILE *fp, off_t size, int editortype, int readonlyflag) 148 { 149 FILE *nf = NULL; 150 int t; 151 time_t modtime; 152 char *editcmd; 153 struct stat statb; 154 155 if ((t = creat(tempEdit, readonlyflag ? 0400 : 0600)) < 0) { 156 perror(tempEdit); 157 goto out; 158 } 159 if ((nf = Fdopen(t, "w")) == NULL) { 160 perror(tempEdit); 161 (void) unlink(tempEdit); 162 goto out; 163 } 164 if (size >= 0) 165 while (--size >= 0 && (t = getc(fp)) != EOF) 166 (void) putc(t, nf); 167 else 168 while ((t = getc(fp)) != EOF) 169 (void) putc(t, nf); 170 (void) fflush(nf); 171 if (ferror(nf)) { 172 (void) Fclose(nf); 173 perror(tempEdit); 174 (void) unlink(tempEdit); 175 nf = NULL; 176 goto out; 177 } 178 if (fstat(fileno(nf), &statb) < 0) 179 modtime = 0; 180 else 181 modtime = statb.st_mtime; 182 if (Fclose(nf) < 0) { 183 perror(tempEdit); 184 (void) unlink(tempEdit); 185 nf = NULL; 186 goto out; 187 } 188 nf = NULL; 189 if ((editcmd = 190 value(editortype == 'e' ? "EDITOR" : "VISUAL")) == NULL) 191 editcmd = editortype == 'e' ? _PATH_EX : _PATH_VI; 192 if (run_command(editcmd, 0, -1, -1, tempEdit, NULL, NULL) < 0) { 193 (void) unlink(tempEdit); 194 goto out; 195 } 196 /* 197 * If in read only mode or file unchanged, just remove the editor 198 * temporary and return. 199 */ 200 if (readonlyflag) { 201 (void) unlink(tempEdit); 202 goto out; 203 } 204 if (stat(tempEdit, &statb) < 0) { 205 perror(tempEdit); 206 goto out; 207 } 208 if (modtime == statb.st_mtime) { 209 (void) unlink(tempEdit); 210 goto out; 211 } 212 /* 213 * Now switch to new file. 214 */ 215 if ((nf = Fopen(tempEdit, "a+")) == NULL) { 216 perror(tempEdit); 217 (void) unlink(tempEdit); 218 goto out; 219 } 220 (void) unlink(tempEdit); 221 out: 222 return nf; 223 } 224