471 lines
11 KiB
C
471 lines
11 KiB
C
/* $NetBSD: fio.c,v 1.8 1997/07/07 22:57:55 phil Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)fio.c 8.2 (Berkeley) 4/20/95";
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#else
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static char rcsid[] = "$NetBSD: fio.c,v 1.8 1997/07/07 22:57:55 phil Exp $";
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#endif
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#endif /* not lint */
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#include "rcv.h"
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#include <sys/file.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <paths.h>
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#include <errno.h>
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#include "extern.h"
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/*
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* Mail -- a mail program
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*
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* File I/O.
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*/
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/*
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* Set up the input pointers while copying the mail file into /tmp.
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*/
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void
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setptr(ibuf, offset)
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register FILE *ibuf;
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off_t offset;
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{
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extern char *tmpdir;
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register int c, count;
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register char *cp, *cp2;
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struct message this;
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FILE *mestmp;
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int maybe, inhead;
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char linebuf[LINESIZE];
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int omsgCount;
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/* Get temporary file. */
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(void)snprintf(linebuf, LINESIZE, "%s/mail.XXXXXX", tmpdir);
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if ((c = mkstemp(linebuf)) == -1 ||
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(mestmp = Fdopen(c, "r+")) == NULL) {
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(void)fprintf(stderr, "mail: can't open %s\n", linebuf);
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exit(1);
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}
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(void)unlink(linebuf);
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if (offset == 0) {
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msgCount = 0;
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} else {
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/* Seek into the file to get to the new messages */
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(void) fseek(ibuf, offset, 0);
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/*
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* We need to make "offset" a pointer to the end of
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* the temp file that has the copy of the mail file.
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* If any messages have been edited, this will be
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* different from the offset into the mail file.
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*/
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(void) fseek(otf, 0L, 2);
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offset = ftell(otf);
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}
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omsgCount = msgCount;
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maybe = 1;
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inhead = 0;
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this.m_flag = MUSED|MNEW;
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this.m_size = 0;
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this.m_lines = 0;
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this.m_block = 0;
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this.m_offset = 0;
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for (;;) {
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if (fgets(linebuf, LINESIZE, ibuf) == NULL) {
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if (append(&this, mestmp)) {
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perror("temporary file");
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exit(1);
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}
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makemessage(mestmp, omsgCount);
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return;
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}
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count = strlen(linebuf);
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(void) fwrite(linebuf, sizeof *linebuf, count, otf);
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if (ferror(otf)) {
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perror("/tmp");
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exit(1);
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}
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linebuf[count - 1] = 0;
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if (maybe && linebuf[0] == 'F' && ishead(linebuf)) {
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msgCount++;
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if (append(&this, mestmp)) {
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perror("temporary file");
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exit(1);
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}
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this.m_flag = MUSED|MNEW;
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this.m_size = 0;
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this.m_lines = 0;
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this.m_block = blockof(offset);
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this.m_offset = offsetof(offset);
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inhead = 1;
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} else if (linebuf[0] == 0) {
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inhead = 0;
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} else if (inhead) {
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for (cp = linebuf, cp2 = "status";; cp++) {
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if ((c = *cp2++) == 0) {
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while (isspace(*cp++))
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;
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if (cp[-1] != ':')
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break;
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while ((c = *cp++) != '\0')
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if (c == 'R')
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this.m_flag |= MREAD;
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else if (c == 'O')
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this.m_flag &= ~MNEW;
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inhead = 0;
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break;
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}
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if (*cp != c && *cp != toupper(c))
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break;
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}
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}
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offset += count;
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this.m_size += count;
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this.m_lines++;
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maybe = linebuf[0] == 0;
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}
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}
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/*
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* Drop the passed line onto the passed output buffer.
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* If a write error occurs, return -1, else the count of
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* characters written, including the newline if requested.
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*/
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int
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putline(obuf, linebuf, outlf)
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FILE *obuf;
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char *linebuf;
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int outlf;
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{
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register int c;
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c = strlen(linebuf);
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(void) fwrite(linebuf, sizeof *linebuf, c, obuf);
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if (outlf) {
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(void) putc('\n', obuf);
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c++;
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}
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if (ferror(obuf))
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return (-1);
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return (c);
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}
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/*
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* Read up a line from the specified input into the line
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* buffer. Return the number of characters read. Do not
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* include the newline at the end.
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*/
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int
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readline(ibuf, linebuf, linesize)
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FILE *ibuf;
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char *linebuf;
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int linesize;
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{
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register int n;
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clearerr(ibuf);
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if (fgets(linebuf, linesize, ibuf) == NULL)
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return -1;
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n = strlen(linebuf);
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if (n > 0 && linebuf[n - 1] == '\n')
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linebuf[--n] = '\0';
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return n;
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}
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/*
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* Return a file buffer all ready to read up the
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* passed message pointer.
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*/
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FILE *
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setinput(mp)
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register struct message *mp;
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{
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fflush(otf);
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if (fseek(itf, (long)positionof(mp->m_block, mp->m_offset), 0) < 0) {
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perror("fseek");
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panic("temporary file seek");
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}
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return (itf);
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}
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/*
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* Take the data out of the passed ghost file and toss it into
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* a dynamically allocated message structure.
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*/
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void
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makemessage(f, omsgCount)
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FILE *f;
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int omsgCount;
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{
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register size = (msgCount + 1) * sizeof (struct message);
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if (omsgCount) {
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message = (struct message *)realloc(message, (unsigned) size);
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if (message == 0)
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panic("Insufficient memory for %d messages\n",
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msgCount);
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} else {
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if (message != 0)
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free((char *) message);
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if ((message = (struct message *) malloc((unsigned) size)) == 0)
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panic("Insufficient memory for %d messages", msgCount);
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dot = message;
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}
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size -= (omsgCount + 1) * sizeof (struct message);
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fflush(f);
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(void) lseek(fileno(f), (off_t)sizeof *message, 0);
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if (read(fileno(f), (char *) &message[omsgCount], size) != size)
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panic("Message temporary file corrupted");
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message[msgCount].m_size = 0;
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message[msgCount].m_lines = 0;
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Fclose(f);
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}
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/*
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* Append the passed message descriptor onto the temp file.
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* If the write fails, return 1, else 0
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*/
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int
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append(mp, f)
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struct message *mp;
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FILE *f;
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{
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return fwrite((char *) mp, sizeof *mp, 1, f) != 1;
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}
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/*
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* Delete a file, but only if the file is a plain file.
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*/
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int
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rm(name)
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char *name;
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{
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struct stat sb;
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if (stat(name, &sb) < 0)
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return(-1);
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if (!S_ISREG(sb.st_mode)) {
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errno = EISDIR;
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return(-1);
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}
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return(unlink(name));
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}
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static int sigdepth; /* depth of holdsigs() */
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static sigset_t nset, oset;
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/*
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* Hold signals SIGHUP, SIGINT, and SIGQUIT.
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*/
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void
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holdsigs()
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{
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if (sigdepth++ == 0) {
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sigemptyset(&nset);
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sigaddset(&nset, SIGHUP);
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sigaddset(&nset, SIGINT);
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sigaddset(&nset, SIGQUIT);
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sigprocmask(SIG_BLOCK, &nset, &oset);
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}
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}
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/*
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* Release signals SIGHUP, SIGINT, and SIGQUIT.
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*/
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void
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relsesigs()
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{
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if (--sigdepth == 0)
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sigprocmask(SIG_SETMASK, &oset, NULL);
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}
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/*
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* Determine the size of the file possessed by
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* the passed buffer.
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*/
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off_t
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fsize(iob)
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FILE *iob;
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{
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struct stat sbuf;
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if (fstat(fileno(iob), &sbuf) < 0)
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return 0;
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return sbuf.st_size;
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}
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/*
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* Evaluate the string given as a new mailbox name.
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* Supported meta characters:
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* % for my system mail box
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* %user for user's system mail box
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* # for previous file
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* & invoker's mbox file
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* +file file in folder directory
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* any shell meta character
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* Return the file name as a dynamic string.
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*/
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char *
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expand(name)
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register char *name;
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{
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char xname[PATHSIZE];
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char cmdbuf[PATHSIZE]; /* also used for file names */
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register int pid, l;
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register char *cp, *shell;
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int pivec[2];
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struct stat sbuf;
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extern union wait wait_status;
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/*
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* The order of evaluation is "%" and "#" expand into constants.
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* "&" can expand into "+". "+" can expand into shell meta characters.
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* Shell meta characters expand into constants.
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* This way, we make no recursive expansion.
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*/
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switch (*name) {
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case '%':
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findmail(name[1] ? name + 1 : myname, xname);
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return savestr(xname);
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case '#':
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if (name[1] != 0)
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break;
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if (prevfile[0] == 0) {
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printf("No previous file\n");
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return NOSTR;
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}
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return savestr(prevfile);
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case '&':
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if (name[1] == 0 && (name = value("MBOX")) == NOSTR)
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name = "~/mbox";
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/* fall through */
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}
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if (name[0] == '+' && getfold(cmdbuf) >= 0) {
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snprintf(xname, PATHSIZE, "%s/%s", cmdbuf, name + 1);
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name = savestr(xname);
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}
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/* catch the most common shell meta character */
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if (name[0] == '~' && (name[1] == '/' || name[1] == '\0')) {
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snprintf(xname, PATHSIZE, "%s%s", homedir, name + 1);
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name = savestr(xname);
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}
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if (!anyof(name, "~{[*?$`'\"\\"))
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return name;
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if (pipe(pivec) < 0) {
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perror("pipe");
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return name;
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}
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snprintf(cmdbuf, PATHSIZE, "echo %s", name);
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if ((shell = value("SHELL")) == NOSTR)
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shell = _PATH_CSHELL;
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pid = start_command(shell, 0, -1, pivec[1], "-c", cmdbuf, NOSTR);
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if (pid < 0) {
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close(pivec[0]);
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close(pivec[1]);
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return NOSTR;
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}
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close(pivec[1]);
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l = read(pivec[0], xname, PATHSIZE);
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close(pivec[0]);
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if (wait_child(pid) < 0 && wait_status.w_termsig != SIGPIPE) {
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fprintf(stderr, "\"%s\": Expansion failed.\n", name);
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return NOSTR;
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}
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if (l < 0) {
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perror("read");
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return NOSTR;
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}
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if (l == 0) {
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fprintf(stderr, "\"%s\": No match.\n", name);
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return NOSTR;
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}
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if (l == PATHSIZE) {
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fprintf(stderr, "\"%s\": Expansion buffer overflow.\n", name);
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return NOSTR;
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}
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xname[l] = '\0';
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for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
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;
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cp[1] = '\0';
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if (index(xname, ' ') && stat(xname, &sbuf) < 0) {
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fprintf(stderr, "\"%s\": Ambiguous.\n", name);
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return NOSTR;
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}
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return savestr(xname);
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}
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/*
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* Determine the current folder directory name.
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*/
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int
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getfold(name)
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char *name;
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{
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char *folder;
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if ((folder = value("folder")) == NOSTR)
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return (-1);
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if (*folder == '/') {
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strncpy(name, folder, PATHSIZE - 1);
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name[PATHSIZE - 1] = '\0' ;
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}
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else
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snprintf(name, PATHSIZE, "%s/%s", homedir, folder);
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return (0);
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}
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/*
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* Return the name of the dead.letter file.
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*/
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char *
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getdeadletter()
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{
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register char *cp;
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if ((cp = value("DEAD")) == NOSTR || (cp = expand(cp)) == NOSTR)
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cp = expand("~/dead.letter");
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else if (*cp != '/') {
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char buf[PATHSIZE];
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(void) snprintf(buf, PATHSIZE, "~/%s", cp);
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cp = expand(buf);
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}
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return cp;
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}
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