1 /* $NetBSD: edit.c,v 1.29 2017/11/09 20:27:50 christos 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)edit.c 8.1 (Berkeley) 6/6/93"; 36 #else 37 __RCSID("$NetBSD: edit.c,v 1.29 2017/11/09 20:27:50 christos Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "rcv.h" 42 #include "extern.h" 43 #include "thread.h" 44 #include "sig.h" 45 46 /* 47 * Mail -- a mail program 48 * 49 * Perform message editing functions. 50 */ 51 52 /* 53 * Run an editor on the file at "fpp" of "size" bytes, 54 * and return a new file pointer. 55 * Signals must be handled by the caller. 56 * "Editortype" is 'e' for _PATH_EX, 'v' for _PATH_VI. 57 */ 58 PUBLIC FILE * 59 run_editor(FILE *fp, off_t size, int editortype, int readonlyflag) 60 { 61 FILE *nf = NULL; 62 int t; 63 time_t modtime; 64 const char *editcmd; 65 char tempname[PATHSIZE]; 66 struct stat statb; 67 68 (void)snprintf(tempname, sizeof(tempname), 69 "%s/mail.ReXXXXXXXXXX", tmpdir); 70 if ((t = mkstemp(tempname)) == -1) { 71 warn("%s", tempname); 72 goto out; 73 } 74 if (readonlyflag && fchmod(t, 0400) == -1) { 75 (void)close(t); 76 warn("%s", tempname); 77 (void)unlink(tempname); 78 goto out; 79 } 80 if ((nf = Fdopen(t, "wef")) == NULL) { 81 (void)close(t); 82 warn("%s", tempname); 83 (void)unlink(tempname); 84 goto out; 85 } 86 if (size >= 0) 87 while (--size >= 0 && (t = getc(fp)) != EOF) 88 (void)putc(t, nf); 89 else 90 while ((t = getc(fp)) != EOF) 91 (void)putc(t, nf); 92 (void)fflush(nf); 93 if (ferror(nf)) { 94 (void)Fclose(nf); 95 warn("%s", tempname); 96 (void)unlink(tempname); 97 nf = NULL; 98 goto out; 99 } 100 if (fstat(fileno(nf), &statb) < 0) 101 modtime = 0; 102 else 103 modtime = statb.st_mtime; 104 if (Fclose(nf) < 0) { 105 warn("%s", tempname); 106 (void)unlink(tempname); 107 nf = NULL; 108 goto out; 109 } 110 nf = NULL; 111 editcmd = value(editortype == 'e' ? ENAME_EDITOR : ENAME_VISUAL); 112 if (editcmd == NULL) 113 editcmd = editortype == 'e' ? _PATH_EX : _PATH_VI; 114 if (run_command(editcmd, NULL, 0, -1, tempname, NULL) < 0) { 115 (void)unlink(tempname); 116 goto out; 117 } 118 /* 119 * If in read only mode or file unchanged, just remove the editor 120 * temporary and return. 121 */ 122 if (readonlyflag) { 123 (void)unlink(tempname); 124 goto out; 125 } 126 if (stat(tempname, &statb) < 0) { 127 warn("%s", tempname); 128 goto out; 129 } 130 if (modtime == statb.st_mtime) { 131 (void)unlink(tempname); 132 goto out; 133 } 134 /* 135 * Now switch to new file. 136 */ 137 if ((nf = Fopen(tempname, "aef+")) == NULL) { 138 warn("%s", tempname); 139 (void)unlink(tempname); 140 goto out; 141 } 142 (void)unlink(tempname); 143 out: 144 return nf; 145 } 146 147 /* 148 * Edit a message by writing the message into a funnily-named file 149 * (which should not exist) and forking an editor on it. 150 * We get the editor from the stuff above. 151 */ 152 static int 153 edit1(int *msgvec, int editortype) 154 { 155 int c; 156 int i; 157 int msgCount; 158 FILE *fp; 159 struct message *mp; 160 off_t size; 161 162 /* 163 * Deal with each message to be edited . . . 164 */ 165 msgCount = get_msgCount(); 166 for (i = 0; i < msgCount && msgvec[i]; i++) { 167 sigset_t oset; 168 struct sigaction osa; 169 170 if (i > 0) { 171 char buf[100]; 172 char *p; 173 174 (void)printf("Edit message %d [ynq]? ", msgvec[i]); 175 if (fgets(buf, (int)sizeof(buf), stdin) == NULL) 176 break; 177 p = skip_WSP(buf); 178 if (*p == 'q') 179 break; 180 if (*p == 'n') 181 continue; 182 } 183 dot = mp = get_message(msgvec[i]); 184 touch(mp); 185 sig_check(); 186 (void)sig_ignore(SIGINT, &osa, &oset); 187 fp = run_editor(setinput(mp), mp->m_size, editortype, 188 readonly); 189 if (fp != NULL) { 190 (void)fseek(otf, 0L, 2); 191 size = ftell(otf); 192 mp->m_block = blockof(size); 193 mp->m_offset = blkoffsetof(size); 194 mp->m_size = fsize(fp); 195 mp->m_lines = 0; 196 mp->m_blines = 0; 197 mp->m_flag |= MMODIFY; 198 rewind(fp); 199 while ((c = getc(fp)) != EOF) { 200 /* 201 * XXX. if you edit a message, we treat 202 * header lines as body lines in the recount. 203 * This is because the original message copy 204 * and the edit reread use different code to 205 * count the lines, and this one here is 206 * simple-minded. 207 */ 208 if (c == '\n') { 209 mp->m_lines++; 210 mp->m_blines++; 211 } 212 if (putc(c, otf) == EOF) 213 break; 214 } 215 if (ferror(otf)) 216 warn("/tmp"); 217 (void)Fclose(fp); 218 } 219 (void)sig_restore(SIGINT, &osa, &oset); 220 sig_check(); 221 } 222 return 0; 223 } 224 225 /* 226 * Edit a message list. 227 */ 228 PUBLIC int 229 editor(void *v) 230 { 231 int *msgvec = v; 232 233 return edit1(msgvec, 'e'); 234 } 235 236 /* 237 * Invoke the visual editor on a message list. 238 */ 239 PUBLIC int 240 visual(void *v) 241 { 242 int *msgvec = v; 243 244 return edit1(msgvec, 'v'); 245 } 246