| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char *sccsid = "@(#)edit.c 5.2 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include "rcv.h" |
| 12 | #include <stdio.h> |
| 13 | #include <sys/stat.h> |
| 14 | |
| 15 | /* |
| 16 | * Mail -- a mail program |
| 17 | * |
| 18 | * Perform message editing functions. |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | * Edit a message list. |
| 23 | */ |
| 24 | |
| 25 | editor(msgvec) |
| 26 | int *msgvec; |
| 27 | { |
| 28 | char *edname; |
| 29 | |
| 30 | if ((edname = value("EDITOR")) == NOSTR) |
| 31 | edname = EDITOR; |
| 32 | return(edit1(msgvec, edname)); |
| 33 | } |
| 34 | |
| 35 | /* |
| 36 | * Invoke the visual editor on a message list. |
| 37 | */ |
| 38 | |
| 39 | visual(msgvec) |
| 40 | int *msgvec; |
| 41 | { |
| 42 | char *edname; |
| 43 | |
| 44 | if ((edname = value("VISUAL")) == NOSTR) |
| 45 | edname = VISUAL; |
| 46 | return(edit1(msgvec, edname)); |
| 47 | } |
| 48 | |
| 49 | /* |
| 50 | * Edit a message by writing the message into a funnily-named file |
| 51 | * (which should not exist) and forking an editor on it. |
| 52 | * We get the editor from the stuff above. |
| 53 | */ |
| 54 | |
| 55 | edit1(msgvec, ed) |
| 56 | int *msgvec; |
| 57 | char *ed; |
| 58 | { |
| 59 | register char *cp, *cp2; |
| 60 | register int c; |
| 61 | int *ip, pid, mesg, lines; |
| 62 | long ms; |
| 63 | int (*sigint)(), (*sigquit)(); |
| 64 | FILE *ibuf, *obuf; |
| 65 | char edname[15], nbuf[10]; |
| 66 | struct message *mp; |
| 67 | extern char tempEdit[]; |
| 68 | off_t fsize(), size; |
| 69 | struct stat statb; |
| 70 | long modtime; |
| 71 | |
| 72 | /* |
| 73 | * Set signals; locate editor. |
| 74 | */ |
| 75 | |
| 76 | sigint = sigset(SIGINT, SIG_IGN); |
| 77 | sigquit = sigset(SIGQUIT, SIG_IGN); |
| 78 | |
| 79 | /* |
| 80 | * Deal with each message to be edited . . . |
| 81 | */ |
| 82 | |
| 83 | for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) { |
| 84 | mesg = *ip; |
| 85 | mp = &message[mesg-1]; |
| 86 | mp->m_flag |= MODIFY; |
| 87 | |
| 88 | /* |
| 89 | * Make up a name for the edit file of the |
| 90 | * form "Message%d" and make sure it doesn't |
| 91 | * already exist. |
| 92 | */ |
| 93 | |
| 94 | cp = &nbuf[10]; |
| 95 | *--cp = 0; |
| 96 | while (mesg) { |
| 97 | *--cp = mesg % 10 + '0'; |
| 98 | mesg /= 10; |
| 99 | } |
| 100 | cp2 = copy("Message", edname); |
| 101 | while (*cp2++ = *cp++) |
| 102 | ; |
| 103 | if (!access(edname, 2)) { |
| 104 | printf("%s: file exists\n", edname); |
| 105 | goto out; |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * Copy the message into the edit file. |
| 110 | */ |
| 111 | |
| 112 | close(creat(edname, 0600)); |
| 113 | if ((obuf = fopen(edname, "w")) == NULL) { |
| 114 | perror(edname); |
| 115 | goto out; |
| 116 | } |
| 117 | if (send(mp, obuf, 0) < 0) { |
| 118 | perror(edname); |
| 119 | fclose(obuf); |
| 120 | remove(edname); |
| 121 | goto out; |
| 122 | } |
| 123 | fflush(obuf); |
| 124 | if (ferror(obuf)) { |
| 125 | remove(edname); |
| 126 | fclose(obuf); |
| 127 | goto out; |
| 128 | } |
| 129 | fclose(obuf); |
| 130 | |
| 131 | /* |
| 132 | * If we are in read only mode, make the |
| 133 | * temporary message file readonly as well. |
| 134 | */ |
| 135 | |
| 136 | if (readonly) |
| 137 | chmod(edname, 0400); |
| 138 | |
| 139 | /* |
| 140 | * Fork/execl the editor on the edit file. |
| 141 | */ |
| 142 | |
| 143 | if (stat(edname, &statb) < 0) |
| 144 | modtime = 0; |
| 145 | modtime = statb.st_mtime; |
| 146 | pid = vfork(); |
| 147 | if (pid == -1) { |
| 148 | perror("fork"); |
| 149 | remove(edname); |
| 150 | goto out; |
| 151 | } |
| 152 | if (pid == 0) { |
| 153 | sigchild(); |
| 154 | if (sigint != SIG_IGN) |
| 155 | sigsys(SIGINT, SIG_DFL); |
| 156 | if (sigquit != SIG_IGN) |
| 157 | sigsys(SIGQUIT, SIG_DFL); |
| 158 | execl(ed, ed, edname, 0); |
| 159 | perror(ed); |
| 160 | _exit(1); |
| 161 | } |
| 162 | while (wait(&mesg) != pid) |
| 163 | ; |
| 164 | |
| 165 | /* |
| 166 | * If in read only mode, just remove the editor |
| 167 | * temporary and return. |
| 168 | */ |
| 169 | |
| 170 | if (readonly) { |
| 171 | remove(edname); |
| 172 | continue; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Now copy the message to the end of the |
| 177 | * temp file. |
| 178 | */ |
| 179 | |
| 180 | if (stat(edname, &statb) < 0) { |
| 181 | perror(edname); |
| 182 | goto out; |
| 183 | } |
| 184 | if (modtime == statb.st_mtime) { |
| 185 | remove(edname); |
| 186 | goto out; |
| 187 | } |
| 188 | if ((ibuf = fopen(edname, "r")) == NULL) { |
| 189 | perror(edname); |
| 190 | remove(edname); |
| 191 | goto out; |
| 192 | } |
| 193 | remove(edname); |
| 194 | fseek(otf, (long) 0, 2); |
| 195 | size = fsize(otf); |
| 196 | mp->m_block = blockof(size); |
| 197 | mp->m_offset = offsetof(size); |
| 198 | ms = 0L; |
| 199 | lines = 0; |
| 200 | while ((c = getc(ibuf)) != EOF) { |
| 201 | if (c == '\n') |
| 202 | lines++; |
| 203 | putc(c, otf); |
| 204 | if (ferror(otf)) |
| 205 | break; |
| 206 | ms++; |
| 207 | } |
| 208 | mp->m_size = ms; |
| 209 | mp->m_lines = lines; |
| 210 | if (ferror(otf)) |
| 211 | perror("/tmp"); |
| 212 | fclose(ibuf); |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * Restore signals and return. |
| 217 | */ |
| 218 | |
| 219 | out: |
| 220 | sigset(SIGINT, sigint); |
| 221 | sigset(SIGQUIT, sigquit); |
| 222 | } |