Annotation of src/usr.bin/mail/edit.c, Revision 1.1
1.1 ! deraadt 1: /*
! 2: * Copyright (c) 1980, 1993
! 3: * The Regents of the University of California. All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. All advertising materials mentioning features or use of this software
! 14: * must display the following acknowledgement:
! 15: * This product includes software developed by the University of
! 16: * California, Berkeley and its contributors.
! 17: * 4. Neither the name of the University nor the names of its contributors
! 18: * may be used to endorse or promote products derived from this software
! 19: * without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 31: * SUCH DAMAGE.
! 32: */
! 33:
! 34: #ifndef lint
! 35: static char sccsid[] = "from: @(#)edit.c 8.1 (Berkeley) 6/6/93";
! 36: static char rcsid[] = "$Id: edit.c,v 1.4 1994/11/28 20:03:32 jtc Exp $";
! 37: #endif /* not lint */
! 38:
! 39: #include "rcv.h"
! 40: #include <fcntl.h>
! 41: #include "extern.h"
! 42:
! 43: /*
! 44: * Mail -- a mail program
! 45: *
! 46: * Perform message editing functions.
! 47: */
! 48:
! 49: /*
! 50: * Edit a message list.
! 51: */
! 52: int
! 53: editor(msgvec)
! 54: int *msgvec;
! 55: {
! 56:
! 57: return edit1(msgvec, 'e');
! 58: }
! 59:
! 60: /*
! 61: * Invoke the visual editor on a message list.
! 62: */
! 63: int
! 64: visual(msgvec)
! 65: int *msgvec;
! 66: {
! 67:
! 68: return edit1(msgvec, 'v');
! 69: }
! 70:
! 71: /*
! 72: * Edit a message by writing the message into a funnily-named file
! 73: * (which should not exist) and forking an editor on it.
! 74: * We get the editor from the stuff above.
! 75: */
! 76: int
! 77: edit1(msgvec, type)
! 78: int *msgvec;
! 79: int type;
! 80: {
! 81: register int c;
! 82: int i;
! 83: FILE *fp;
! 84: register struct message *mp;
! 85: off_t size;
! 86:
! 87: /*
! 88: * Deal with each message to be edited . . .
! 89: */
! 90: for (i = 0; msgvec[i] && i < msgCount; i++) {
! 91: sig_t sigint;
! 92:
! 93: if (i > 0) {
! 94: char buf[100];
! 95: char *p;
! 96:
! 97: printf("Edit message %d [ynq]? ", msgvec[i]);
! 98: if (fgets(buf, sizeof buf, stdin) == 0)
! 99: break;
! 100: for (p = buf; *p == ' ' || *p == '\t'; p++)
! 101: ;
! 102: if (*p == 'q')
! 103: break;
! 104: if (*p == 'n')
! 105: continue;
! 106: }
! 107: dot = mp = &message[msgvec[i] - 1];
! 108: touch(mp);
! 109: sigint = signal(SIGINT, SIG_IGN);
! 110: fp = run_editor(setinput(mp), mp->m_size, type, readonly);
! 111: if (fp != NULL) {
! 112: (void) fseek(otf, 0L, 2);
! 113: size = ftell(otf);
! 114: mp->m_block = blockof(size);
! 115: mp->m_offset = offsetof(size);
! 116: mp->m_size = fsize(fp);
! 117: mp->m_lines = 0;
! 118: mp->m_flag |= MODIFY;
! 119: rewind(fp);
! 120: while ((c = getc(fp)) != EOF) {
! 121: if (c == '\n')
! 122: mp->m_lines++;
! 123: if (putc(c, otf) == EOF)
! 124: break;
! 125: }
! 126: if (ferror(otf))
! 127: perror("/tmp");
! 128: (void) Fclose(fp);
! 129: }
! 130: (void) signal(SIGINT, sigint);
! 131: }
! 132: return 0;
! 133: }
! 134:
! 135: /*
! 136: * Run an editor on the file at "fpp" of "size" bytes,
! 137: * and return a new file pointer.
! 138: * Signals must be handled by the caller.
! 139: * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI.
! 140: */
! 141: FILE *
! 142: run_editor(fp, size, type, readonly)
! 143: register FILE *fp;
! 144: off_t size;
! 145: int type, readonly;
! 146: {
! 147: register FILE *nf = NULL;
! 148: register int t;
! 149: time_t modtime;
! 150: char *edit;
! 151: struct stat statb;
! 152: extern char *tempEdit;
! 153:
! 154: if ((t = creat(tempEdit, readonly ? 0400 : 0600)) < 0) {
! 155: perror(tempEdit);
! 156: goto out;
! 157: }
! 158: if ((nf = Fdopen(t, "w")) == NULL) {
! 159: perror(tempEdit);
! 160: (void) unlink(tempEdit);
! 161: goto out;
! 162: }
! 163: if (size >= 0)
! 164: while (--size >= 0 && (t = getc(fp)) != EOF)
! 165: (void) putc(t, nf);
! 166: else
! 167: while ((t = getc(fp)) != EOF)
! 168: (void) putc(t, nf);
! 169: (void) fflush(nf);
! 170: if (fstat(fileno(nf), &statb) < 0)
! 171: modtime = 0;
! 172: else
! 173: modtime = statb.st_mtime;
! 174: if (ferror(nf)) {
! 175: (void) Fclose(nf);
! 176: perror(tempEdit);
! 177: (void) unlink(tempEdit);
! 178: nf = NULL;
! 179: goto out;
! 180: }
! 181: if (Fclose(nf) < 0) {
! 182: perror(tempEdit);
! 183: (void) unlink(tempEdit);
! 184: nf = NULL;
! 185: goto out;
! 186: }
! 187: nf = NULL;
! 188: if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NOSTR)
! 189: edit = type == 'e' ? _PATH_EX : _PATH_VI;
! 190: if (run_command(edit, 0, -1, -1, tempEdit, NOSTR, NOSTR) < 0) {
! 191: (void) unlink(tempEdit);
! 192: goto out;
! 193: }
! 194: /*
! 195: * If in read only mode or file unchanged, just remove the editor
! 196: * temporary and return.
! 197: */
! 198: if (readonly) {
! 199: (void) unlink(tempEdit);
! 200: goto out;
! 201: }
! 202: if (stat(tempEdit, &statb) < 0) {
! 203: perror(tempEdit);
! 204: goto out;
! 205: }
! 206: if (modtime == statb.st_mtime) {
! 207: (void) unlink(tempEdit);
! 208: goto out;
! 209: }
! 210: /*
! 211: * Now switch to new file.
! 212: */
! 213: if ((nf = Fopen(tempEdit, "a+")) == NULL) {
! 214: perror(tempEdit);
! 215: (void) unlink(tempEdit);
! 216: goto out;
! 217: }
! 218: (void) unlink(tempEdit);
! 219: out:
! 220: return nf;
! 221: }
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