2.11BSD/src/ucb/Mail/fio.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if !defined(lint) && defined(DOSCCS)
static char sccsid[] = "@(#)fio.c 5.24.2 (2.11BSD) 1997/11/3";
#endif
#include "rcv.h"
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/wait.h>
#include <paths.h>
#include <errno.h>
/*
* Mail -- a mail program
*
* File I/O.
*/
/*
* Set up the input pointers while copying the mail file into /tmp.
*/
setptr(ibuf)
register FILE *ibuf;
{
register int c, count;
register char *cp, *cp2;
struct message this;
FILE *mestmp;
off_t offset;
int maybe, inhead;
char linebuf[LINESIZE];
/* Get temporary file. */
(void)sprintf(linebuf, "%smail.XXXXXX", _PATH_TMP);
if ((c = mkstemp(linebuf)) == -1 ||
(mestmp = Fdopen(c, "r+")) == NULL) {
(void)fprintf(stderr, "mail: can't open %s\n", linebuf);
exit(1);
}
(void)unlink(linebuf);
msgCount = 0;
maybe = 1;
inhead = 0;
offset = 0;
this.m_flag = MUSED|MNEW;
this.m_size = 0;
this.m_lines = 0;
this.m_block = 0;
this.m_offset = 0;
for (;;) {
if (fgets(linebuf, LINESIZE, ibuf) == NULL) {
if (append(&this, mestmp)) {
perror("temporary file");
exit(1);
}
makemessage(mestmp);
return;
}
count = strlen(linebuf);
(void) fwrite(linebuf, sizeof *linebuf, count, otf);
if (ferror(otf)) {
perror("/tmp");
exit(1);
}
linebuf[count - 1] = 0;
if (maybe && linebuf[0] == 'F' && ishead(linebuf)) {
msgCount++;
if (append(&this, mestmp)) {
perror("temporary file");
exit(1);
}
this.m_flag = MUSED|MNEW;
this.m_size = 0;
this.m_lines = 0;
this.m_block = blockof(offset);
this.m_offset = offstof(offset);
inhead = 1;
} else if (linebuf[0] == 0) {
inhead = 0;
} else if (inhead) {
for (cp = linebuf, cp2 = "status";; cp++) {
if ((c = *cp2++) == 0) {
while (isspace(*cp++))
;
if (cp[-1] != ':')
break;
while (c = *cp++)
if (c == 'R')
this.m_flag |= MREAD;
else if (c == 'O')
this.m_flag &= ~MNEW;
inhead = 0;
break;
}
if (*cp != c && *cp != toupper(c))
break;
}
}
offset += count;
this.m_size += count;
this.m_lines++;
maybe = linebuf[0] == 0;
}
}
/*
* Drop the passed line onto the passed output buffer.
* If a write error occurs, return -1, else the count of
* characters written, including the newline.
*/
putline(obuf, linebuf)
register FILE *obuf;
char *linebuf;
{
register int c;
c = strlen(linebuf);
(void) fwrite(linebuf, sizeof *linebuf, c, obuf);
(void) putc('\n', obuf);
if (ferror(obuf))
return (-1);
return (c + 1);
}
/*
* Read up a line from the specified input into the line
* buffer. Return the number of characters read. Do not
* include the newline at the end.
*/
readline(ibuf, linebuf, linesize)
FILE *ibuf;
register char *linebuf;
{
register int n;
clearerr(ibuf);
if (fgets(linebuf, linesize, ibuf) == NULL)
return -1;
n = strlen(linebuf);
if (n > 0 && linebuf[n - 1] == '\n')
linebuf[--n] = '\0';
return n;
}
/*
* Return a file buffer all ready to read up the
* passed message pointer.
*/
FILE *
setinput(mp)
register struct message *mp;
{
fflush(otf);
if (fseek(itf, positionof(mp->m_block, mp->m_offset), 0) < 0) {
perror("fseek");
panic("temporary file seek");
}
return (itf);
}
/*
* Take the data out of the passed ghost file and toss it into
* a dynamically allocated message structure.
*/
makemessage(f)
FILE *f;
{
register size = (msgCount + 1) * sizeof (struct message);
if (message != 0)
free((char *) message);
if ((message = (struct message *) malloc((unsigned) size)) == 0)
panic("Insufficient memory for %d messages", msgCount);
dot = message;
size -= sizeof (struct message);
fflush(f);
(void) lseek(fileno(f), (long) sizeof *message, 0);
if (read(fileno(f), (char *) message, size) != size)
panic("Message temporary file corrupted");
message[msgCount].m_size = 0;
message[msgCount].m_lines = 0;
Fclose(f);
}
/*
* Append the passed message descriptor onto the temp file.
* If the write fails, return 1, else 0
*/
append(mp, f)
struct message *mp;
FILE *f;
{
return fwrite((char *) mp, sizeof *mp, 1, f) != 1;
}
/*
* Delete a file, but only if the file is a plain file.
*/
rm(name)
char *name;
{
struct stat sb;
if (stat(name, &sb) < 0)
return(-1);
if (!S_ISREG(sb.st_mode)) {
errno = EISDIR;
return(-1);
}
return(unlink(name));
}
static int sigdepth; /* depth of holdsigs() */
static long omask;
/*
* Hold signals SIGHUP, SIGINT, and SIGQUIT.
*/
holdsigs()
{
if (sigdepth++ == 0)
omask = sigblock(sigmask(SIGHUP)|sigmask(SIGINT)|sigmask(SIGQUIT));
}
/*
* Release signals SIGHUP, SIGINT, and SIGQUIT.
*/
relsesigs()
{
if (--sigdepth == 0)
sigsetmask(omask);
}
/*
* Determine the size of the file possessed by
* the passed buffer.
*/
off_t
fsize(iob)
FILE *iob;
{
struct stat sbuf;
if (fstat(fileno(iob), &sbuf) < 0)
return 0;
return sbuf.st_size;
}
/*
* Evaluate the string given as a new mailbox name.
* Supported meta characters:
* % for my system mail box
* %user for user's system mail box
* # for previous file
* & invoker's mbox file
* +file file in folder directory
* any shell meta character
* Return the file name as a dynamic string.
*/
char *
expand(name)
register char *name;
{
char xname[PATHSIZE];
char cmdbuf[PATHSIZE]; /* also used for file names */
register int pid, l;
register char *cp, *shell;
int pivec[2];
struct stat sbuf;
extern union wait wait_status;
/*
* The order of evaluation is "%" and "#" expand into constants.
* "&" can expand into "+". "+" can expand into shell meta characters.
* Shell meta characters expand into constants.
* This way, we make no recursive expansion.
*/
switch (*name) {
case '%':
findmail(name[1] ? name + 1 : myname, xname);
return savestr(xname);
case '#':
if (name[1] != 0)
break;
if (prevfile[0] == 0) {
printf("No previous file\n");
return NOSTR;
}
return savestr(prevfile);
case '&':
if (name[1] == 0 && (name = value("MBOX")) == NOSTR)
name = "~/mbox";
/* fall through */
}
if (name[0] == '+' && getfold(cmdbuf) >= 0) {
sprintf(xname, "%s/%s", cmdbuf, name + 1);
name = savestr(xname);
}
/* catch the most common shell meta character */
if (name[0] == '~' && (name[1] == '/' || name[1] == '\0')) {
sprintf(xname, "%s%s", homedir, name + 1);
name = savestr(xname);
}
if (!anyof(name, "~{[*?$`'\"\\"))
return name;
if (pipe(pivec) < 0) {
perror("pipe");
return name;
}
sprintf(cmdbuf, "echo %s", name);
if ((shell = value("SHELL")) == NOSTR)
shell = _PATH_CSHELL;
pid = start_command(shell, 0L, -1, pivec[1], "-c", cmdbuf, NOSTR);
if (pid < 0) {
close(pivec[0]);
close(pivec[1]);
return NOSTR;
}
close(pivec[1]);
l = read(pivec[0], xname, BUFSIZ);
close(pivec[0]);
if (wait_child(pid) < 0 && wait_status.w_termsig != SIGPIPE) {
fprintf(stderr, "\"%s\": Expansion failed.\n", name);
return NOSTR;
}
if (l < 0) {
perror("read");
return NOSTR;
}
if (l == 0) {
fprintf(stderr, "\"%s\": No match.\n", name);
return NOSTR;
}
if (l == BUFSIZ) {
fprintf(stderr, "\"%s\": Expansion buffer overflow.\n", name);
return NOSTR;
}
xname[l] = 0;
for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
;
cp[1] = '\0';
if (index(xname, ' ') && stat(xname, &sbuf) < 0) {
fprintf(stderr, "\"%s\": Ambiguous.\n", name);
return NOSTR;
}
return savestr(xname);
}
/*
* Determine the current folder directory name.
*/
getfold(name)
char *name;
{
register char *folder;
if ((folder = value("folder")) == NOSTR)
return (-1);
if (*folder == '/')
strcpy(name, folder);
else
sprintf(name, "%s/%s", homedir, folder);
return (0);
}
/*
* Return the name of the dead.letter file.
*/
char *
getdeadletter()
{
register char *cp;
if ((cp = value("DEAD")) == NOSTR || (cp = expand(cp)) == NOSTR)
cp = expand("~/dead.letter");
else if (*cp != '/') {
char buf[PATHSIZE];
(void) sprintf(buf, "~/%s", cp);
cp = expand(buf);
}
return cp;
}