/*
* scansbr.c -- routines to help scan along...
*
* $Id: scansbr.c,v 1.6 2003/08/11 01:20:52 jchonig Exp $
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include <h/mh.h>
#include <h/addrsbr.h>
#include <h/fmt_scan.h>
#include <h/scansbr.h>
#include <h/tws.h>
#ifdef _FSTDIO
# define _ptr _p /* Gag */
# define _cnt _w /* Wretch */
#endif
#ifdef SCO_5_STDIO
# define _ptr __ptr
# define _cnt __cnt
# define _base __base
# define _filbuf(fp) ((fp)->__cnt = 0, __filbuf(fp))
#endif
#define MAXSCANL 256 /* longest possible scan line */
/*
* Buffer size for content part of header fields. We want this
* to be large enough so that we don't do a lot of extra FLDPLUS
* calls on m_getfld but small enough so that we don't snarf
* the entire message body when we're only going to display 30
* characters of it.
*/
#define SBUFSIZ 512
static struct format *fmt;
#ifdef JLR
static struct format *fmt_top;
#endif /* JLR */
static struct comp *datecomp; /* pntr to "date" comp */
static struct comp *bodycomp; /* pntr to "body" pseudo-comp *
* (if referenced) */
static int ncomps = 0; /* # of interesting components */
static char **compbuffers = 0; /* buffers for component text */
static struct comp **used_buf = 0; /* stack for comp that use buffers */
static int dat[5]; /* aux. data for format routine */
char *scanl = 0; /* text of most recent scanline */
#define DIEWRERR() adios (scnmsg, "write error on")
#define FPUTS(buf) {\
if (mh_fputs(buf,scnout) == EOF)\
DIEWRERR();\
}
/*
* prototypes
*/
int sc_width (void); /* from termsbr.c */
static int mh_fputs(char *, FILE *);
int
scan (FILE *inb, int innum, int outnum, char *nfs, int width, int curflg,
int unseen, char *folder, long size, int noisy)
{
int i, compnum, encrypted, state;
char *cp, *tmpbuf, **nxtbuf;
char *saved_c_text;
struct comp *cptr;
struct comp **savecomp;
char *scnmsg;
FILE *scnout;
char name[NAMESZ];
static int rlwidth, slwidth;
#ifdef RPATHS
char returnpath[BUFSIZ];
char deliverydate[BUFSIZ];
#endif
/* first-time only initialization */
if (!scanl) {
if (width == 0) {
if ((width = sc_width ()) < WIDTH/2)
width = WIDTH/2;
else if (width > MAXSCANL)
width = MAXSCANL;
}
dat[3] = slwidth = width;
if ((scanl = (char *) malloc((size_t) (slwidth + 2) )) == NULL)
adios (NULL, "unable to malloc scan line (%d bytes)", slwidth+2);
if (outnum)
umask(~m_gmprot());
/* Compile format string */
ncomps = fmt_compile (nfs, &fmt) + 1;
#ifdef JLR
fmt_top = fmt;
#endif /* JLR */
FINDCOMP(bodycomp, "body");
FINDCOMP(datecomp, "date");
FINDCOMP(cptr, "folder");
if (cptr && folder)
cptr->c_text = folder;
FINDCOMP(cptr, "encrypted");
if (!cptr)
if ((cptr = (struct comp *) calloc (1, sizeof(*cptr)))) {
cptr->c_name = "encrypted";
cptr->c_next = wantcomp[i = CHASH (cptr->c_name)];
wantcomp[i] = cptr;
ncomps++;
}
FINDCOMP (cptr, "dtimenow");
if (cptr)
cptr->c_text = getcpy(dtimenow (0));
nxtbuf = compbuffers = (char **) calloc((size_t) ncomps, sizeof(char *));
if (nxtbuf == NULL)
adios (NULL, "unable to allocate component buffers");
used_buf = (struct comp **) calloc((size_t) (ncomps+1),
sizeof(struct comp *));
if (used_buf == NULL)
adios (NULL, "unable to allocate component buffer stack");
used_buf += ncomps+1; *--used_buf = 0;
rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
for (i = ncomps; i--; )
if ((*nxtbuf++ = malloc(rlwidth)) == NULL)
adios (NULL, "unable to allocate component buffer");
}
/*
* each-message initialization
*/
nxtbuf = compbuffers;
savecomp = used_buf;
tmpbuf = *nxtbuf++;
dat[0] = innum ? innum : outnum;
dat[1] = curflg;
dat[4] = unseen;
/*
* Get the first field. If the message is non-empty
* and we're doing an "inc", open the output file.
*/
if ((state = m_getfld (FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
if (ferror(inb)) {
advise("read", "unable to"); /* "read error" */
return SCNFAT;
} else {
return SCNEOF;
}
}
if (outnum) {
if (outnum > 0) {
scnmsg = m_name (outnum);
if (*scnmsg == '?') /* msg num out of range */
return SCNNUM;
} else {
scnmsg = "/dev/null";
}
if ((scnout = fopen (scnmsg, "w")) == NULL)
adios (scnmsg, "unable to write");
#ifdef RPATHS
/*
* Add the Return-Path and Delivery-Date
* header fields to message.
*/
if (get_returnpath (returnpath, sizeof(returnpath),
deliverydate, sizeof(deliverydate))) {
FPUTS ("Return-Path: ");
FPUTS (returnpath);
FPUTS ("Delivery-Date: ");
FPUTS (deliverydate);
}
#endif /* RPATHS */
}
/* scan - main loop */
for (compnum = 1; ; state = m_getfld (state, name, tmpbuf, rlwidth, inb)) {
switch (state) {
case FLD:
case FLDPLUS:
compnum++;
if (outnum) {
FPUTS (name);
if ( putc (':', scnout) == EOF) DIEWRERR();
FPUTS (tmpbuf);
}
/*
* if we're interested in this component, save a pointer
* to the component text, then start using our next free
* buffer as the component temp buffer (buffer switching
* saves an extra copy of the component text).
*/
if ((cptr = wantcomp[CHASH(name)])) {
do {
if (!strcasecmp(name, cptr->c_name)) {
if (! cptr->c_text) {
cptr->c_text = tmpbuf;
for (cp = tmpbuf + strlen (tmpbuf) - 1;
cp >= tmpbuf; cp--)
if (isspace (*cp))
*cp = 0;
else
break;
*--savecomp = cptr;
tmpbuf = *nxtbuf++;
}
break;
}
} while ((cptr = cptr->c_next));
}
while (state == FLDPLUS) {
state = m_getfld (state, name, tmpbuf, rlwidth, inb);
if (outnum)
FPUTS (tmpbuf);
}
break;
case BODY:
compnum = -1;
if (! outnum) {
state = FILEEOF; /* stop now if scan cmd */
goto finished;
}
if (putc ('\n', scnout) == EOF) DIEWRERR();
FPUTS (tmpbuf);
/*
* performance hack: some people like to run "inc" on
* things like net.sources or large digests. We do a
* copy directly into the output buffer rather than
* going through an intermediate buffer.
*
* We need the amount of data m_getfld found & don't
* want to do a strlen on the long buffer so there's
* a hack in m_getfld to save the amount of data it
* returned in the global "msg_count".
*/
body:;
while (state == BODY) {
#ifdef LINUX_STDIO
if (scnout->_IO_write_ptr == scnout->_IO_write_end) {
#else
if (scnout->_cnt <= 0) {
#endif
if (fflush(scnout) == EOF)
DIEWRERR ();
}
#ifdef LINUX_STDIO
state = m_getfld(state, name, scnout->_IO_write_ptr,
(long)scnout->_IO_write_ptr-(long)scnout->_IO_write_end , inb);
scnout->_IO_write_ptr += msg_count;
#else
state = m_getfld( state, name, scnout->_ptr, -(scnout->_cnt), inb );
scnout->_cnt -= msg_count;
scnout->_ptr += msg_count;
#endif
}
goto finished;
case LENERR:
case FMTERR:
fprintf (stderr,
innum ? "??Format error (message %d) in "
: "??Format error in ",
outnum ? outnum : innum);
fprintf (stderr, "component %d\n", compnum);
if (outnum) {
FPUTS ("\n\nBAD MSG:\n");
FPUTS (name);
if (putc ('\n', scnout) == EOF) DIEWRERR();
state = BODY;
goto body;
}
/* fall through */
case FILEEOF:
goto finished;
default:
adios (NULL, "getfld() returned %d", state);
}
}
/*
* format and output the scan line.
*/
finished:
if (ferror(inb)) {
advise("read", "unable to"); /* "read error" */
return SCNFAT;
}
/* Save and restore buffer so we don't trash our dynamic pool! */
if (bodycomp) {
saved_c_text = bodycomp->c_text;
bodycomp->c_text = tmpbuf;
}
if (size)
dat[2] = size;
else if (outnum > 0)
{
dat[2] = ftell(scnout);
if (dat[2] == EOF) DIEWRERR();
}
if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
struct stat st;
fstat (fileno(inb), &st);
if (!size && !outnum)
dat[2] = st.st_size;
if (datecomp) {
if (! datecomp->c_text) {
if (datecomp->c_tws == NULL)
datecomp->c_tws = (struct tws *)
calloc((size_t) 1, sizeof(*datecomp->c_tws));
if (datecomp->c_tws == NULL)
adios (NULL, "unable to allocate tws buffer");
*datecomp->c_tws = *dlocaltime ((time_t *) &st.st_mtime);
datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
} else {
datecomp->c_flags &= ~CF_DATEFAB;
}
}
}
fmt_scan (fmt, scanl, slwidth, dat);
#if 0
fmt = fmt_scan (fmt, scanl, slwidth, dat);
if (!fmt)
fmt = fmt_top; /* reset for old format files */
#endif
if (bodycomp)
bodycomp->c_text = saved_c_text;
if (noisy)
fputs (scanl, stdout);
FINDCOMP (cptr, "encrypted");
encrypted = cptr && cptr->c_text;
/* return dynamically allocated buffers to pool */
while ((cptr = *savecomp++)) {
*--nxtbuf = cptr->c_text;
cptr->c_text = NULL;
}
*--nxtbuf = tmpbuf;
if (outnum && (ferror(scnout) || fclose (scnout) == EOF))
DIEWRERR();
return (state != FILEEOF ? SCNERR : encrypted ? SCNENC : SCNMSG);
}
/*
* Cheat: we are loaded with adrparse, which wants a routine called
* OfficialName(). We call adrparse:getm() with the correct arguments
* to prevent OfficialName() from being called. Hence, the following
* is to keep the loader happy.
*/
char *
OfficialName (char *name)
{
return name;
}
static int
mh_fputs(char *s, FILE *stream)
{
char c;
while ((c = *s++))
if (putc (c,stream) == EOF )
return(EOF);
return (0);
}
syntax highlighted by Code2HTML, v. 0.9.1