1 /* $OpenBSD: edit.c,v 1.11 2001/11/21 15:26:39 millert Exp $ */ 2 /* $NetBSD: edit.c,v 1.5 1996/06/08 19:48:20 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static const char sccsid[] = "@(#)edit.c 8.1 (Berkeley) 6/6/93"; 40 #else 41 static const char rcsid[] = "$OpenBSD: edit.c,v 1.11 2001/11/21 15:26:39 millert Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 #include "rcv.h" 46 #include <fcntl.h> 47 #include "extern.h" 48 49 /* 50 * Mail -- a mail program 51 * 52 * Perform message editing functions. 53 */ 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 type) 84 { 85 int c, i; 86 FILE *fp; 87 struct sigaction oact; 88 sigset_t oset; 89 struct message *mp; 90 off_t size; 91 92 /* 93 * Deal with each message to be edited . . . 94 */ 95 for (i = 0; msgvec[i] && i < msgCount; i++) { 96 if (i > 0) { 97 char buf[100]; 98 char *p; 99 100 printf("Edit message %d [ynq]? ", msgvec[i]); 101 if (fgets(buf, sizeof(buf), stdin) == 0) 102 break; 103 for (p = buf; *p == ' ' || *p == '\t'; p++) 104 ; 105 if (*p == 'q') 106 break; 107 if (*p == 'n') 108 continue; 109 } 110 dot = mp = &message[msgvec[i] - 1]; 111 touch(mp); 112 (void)ignoresig(SIGINT, &oact, &oset); 113 fp = run_editor(setinput(mp), mp->m_size, type, readonly); 114 if (fp != NULL) { 115 (void)fseek(otf, 0L, 2); 116 size = ftell(otf); 117 mp->m_block = blockof(size); 118 mp->m_offset = offsetof(size); 119 mp->m_size = fsize(fp); 120 mp->m_lines = 0; 121 mp->m_flag |= MODIFY; 122 rewind(fp); 123 while ((c = getc(fp)) != EOF) { 124 if (c == '\n') 125 mp->m_lines++; 126 if (putc(c, otf) == EOF) 127 break; 128 } 129 if (ferror(otf)) 130 warn("/tmp"); 131 (void)Fclose(fp); 132 } 133 (void)sigprocmask(SIG_SETMASK, &oset, NULL); 134 (void)sigaction(SIGINT, &oact, NULL); 135 } 136 return(0); 137 } 138 139 /* 140 * Run an editor on the file at "fpp" of "size" bytes, 141 * and return a new file pointer. 142 * Signals must be handled by the caller. 143 * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. 144 */ 145 FILE * 146 run_editor(FILE *fp, off_t size, int type, int readonly) 147 { 148 FILE *nf = NULL; 149 int t; 150 time_t modtime; 151 char *edit, tempname[PATHSIZE]; 152 struct stat statb; 153 154 (void)snprintf(tempname, sizeof(tempname), 155 "%s/mail.ReXXXXXXXXXX", tmpdir); 156 if ((t = mkstemp(tempname)) == -1 || 157 (nf = Fdopen(t, "w")) == NULL) { 158 warn("%s", tempname); 159 goto out; 160 } 161 if (readonly && fchmod(t, 0400) == -1) { 162 warn("%s", tempname); 163 (void)rm(tempname); 164 goto out; 165 } 166 if (size >= 0) 167 while (--size >= 0 && (t = getc(fp)) != EOF) 168 (void)putc(t, nf); 169 else 170 while ((t = getc(fp)) != EOF) 171 (void)putc(t, nf); 172 (void)fflush(nf); 173 if (fstat(fileno(nf), &statb) < 0) 174 modtime = 0; 175 else 176 modtime = statb.st_mtime; 177 if (ferror(nf)) { 178 (void)Fclose(nf); 179 warn("%s", tempname); 180 (void)rm(tempname); 181 nf = NULL; 182 goto out; 183 } 184 if (Fclose(nf) < 0) { 185 warn("%s", tempname); 186 (void)rm(tempname); 187 nf = NULL; 188 goto out; 189 } 190 nf = NULL; 191 if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NULL) 192 edit = type == 'e' ? _PATH_EX : _PATH_VI; 193 if (run_command(edit, 0, 0, -1, tempname, NULL, NULL) < 0) { 194 (void)rm(tempname); 195 goto out; 196 } 197 /* 198 * If in read only mode or file unchanged, just remove the editor 199 * temporary and return. 200 */ 201 if (readonly) { 202 (void)rm(tempname); 203 goto out; 204 } 205 if (stat(tempname, &statb) < 0) { 206 warn("%s", tempname); 207 goto out; 208 } 209 if (modtime == statb.st_mtime) { 210 (void)rm(tempname); 211 goto out; 212 } 213 /* 214 * Now switch to new file. 215 */ 216 if ((nf = Fopen(tempname, "a+")) == NULL) { 217 warn("%s", tempname); 218 (void)rm(tempname); 219 goto out; 220 } 221 (void)rm(tempname); 222 out: 223 return(nf); 224 } 225