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Commit 27205809 27205809701bdc477b0dc89fe3d46f0d099bc8bf by Alain Magloire
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Instead of writing the documentation, found a diversion "frm" is a clone 

to the "frm" that comes with elm package.  It was written in less then 15
minutes, cool.
1 parent 4be5bd8f
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Showing 5 changed files with 834 additions and 0 deletions
......@@ -17,7 +17,9 @@
/* Define if using libpam */
#undef USE_LIBPAM
#undef HAVE_SNPRINTF
#undef WITH_PTHREAD
/* Define if using libreadline */
......
CFLAGS = -Wall -pedantic -g -DTESTING
INCLUDES = -I$(top_srcdir)/include -I$(top_srcdir)/lib
bin_PROGRAMS = frm
from_DEPENDENCIES = ../mailbox/libmailbox.la
from_LDADD = ../mailbox/libmailbox.la ../lib/libmailutils.a
/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "getopt.h"
#include <mailutils/mailbox.h>
#include <mailutils/header.h>
#include <mailutils/registrar.h>
#include <mailutils/observer.h>
#include <mailutils/address.h>
static int action (observer_t, size_t);
static int counter;
static struct option long_options[] =
{
{"help", no_argument, 0, 'h'},
{"to", no_argument, 0, 'l'},
{"number", no_argument, 0, 'n'},
{"Quiet", no_argument, 0, 'Q'},
{"query", no_argument, 0, 'q'},
{"status", required_argument, 0, 's'},
{"align", no_argument, 0, 't'},
{"version", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
const char *short_options ="hlnQqs:tv";
static int show_to;
static int show_from = 1;
static int show_subject = 1;
static int show_number;
static int show_summary;
static int be_quiet;
static int be_silent;
static int align = 1;
static int show_query;
static int have_new_mail;
#define IS_READ 0x001
#define IS_OLD 0x010
#define IS_NEW 0x100
static int select_attribute;
static int counter;
/* Retrieve the Personal Name from the header To: or From: */
static int
get_personal (header_t hdr, char *field, char *personal, size_t buflen)
{
char hfield[512];
int status;
/* Empty string. */
*hfield = '\0';
status = header_get_value (hdr, field, hfield, sizeof (hfield), NULL);
if (status == 0)
{
address_t address = NULL;
size_t len = 0;
address_create (&address, hfield);
address_get_personal (address, 1, personal, buflen, &len);
address_destroy (&address);
if (len == 0)
strncpy (personal, hfield, buflen)[buflen - 1] = '\0';
}
return status;
}
/* Observable Action this is being call at every message discover. */
/* FIXME: The format of the display is poorly done, please correct. */
static int
action (observer_t o, size_t type)
{
switch (type)
{
case MU_EVT_MESSAGE_ADD:
{
mailbox_t mbox = observer_get_owner (o);
message_t msg = NULL;
header_t hdr = NULL;
attribute_t attr = NULL;
char hsubject[512];
counter++;
mailbox_get_message (mbox, counter, &msg);
message_get_attribute (msg, &attr);
message_get_header (msg, &hdr);
if (select_attribute
&& (select_attribute & IS_READ)
&& (!attribute_is_read (attr)))
{
break;
}
else if (select_attribute
&& (select_attribute & IS_NEW)
&& (!attribute_is_recent (attr)))
{
break;
}
else if (select_attribute
&& (select_attribute & IS_OLD)
&& (!attribute_is_seen (attr)))
{
break;
}
if (attribute_is_recent (attr))
have_new_mail = 1;
if (be_quiet)
break;
if (show_number)
printf ("%d: ", counter);
if (show_to)
{
char hto[16];
int status = get_personal (hdr, MU_HEADER_TO, hto, sizeof (hto));
if (status == 0)
printf ("(%s) ", hto);
else
printf ("(------)");
}
if (show_from)
{
char hfrom[32];
int status = get_personal (hdr, MU_HEADER_FROM, hfrom,
sizeof (hfrom));
if (status == 0)
printf ("%s\t", hfrom);
else
printf ("-----\t");
}
if (show_subject)
{
char hsubject[64];
int status = header_get_value (hdr, MU_HEADER_SUBJECT, hsubject,
sizeof (hsubject), NULL);
printf("%s\n", hsubject);
}
break;
}
case MU_EVT_MAILBOX_PROGRESS:
/* Noop. */
break;
}
return 0;
}
void
usage (const char *argv)
{
printf ("GNU Mailutils.\n");
printf ("Usage: %s [OPTIONS]\n\n", argv);
printf (" -h, --help display this help and exit\n");
printf (" -l, --to include the To: information\n");
printf (" -n, --number display the message numberd\n");
printf (" -Q, --Quiet very quiet\n");
printf (" -q, --query print a message if unread mail\n");
printf (" -s, --status=[nor] select message with the specific \
attribute\n");
printf (" [n]ew, [r]ead, [u]nread.\n");
printf (" -t, --align Try to align\n");
printf (" -v, --version display version information and exit\n");
printf ("\nReport bugs to bug-mailutils@gnu.org\n");
exit (0);
}
/* This a close of the elm program call "frm". It is a good example on
how to use the observable(callback) of libmailutils. "frm" has to
be very interactive so it is not possible to call mailbox_messages_count()
and wait for the scanning to finish before displaying. As soon as the scan
find a new message we want to know about it, this is done by registering
an observable type MU_MAILBOX_NEW_MSG. The rest is simple displaying
formating code. */
int
main(int argc, char **argv)
{
char *mailbox_name = NULL;
int c;
while ((c = getopt_long (argc, argv, short_options, long_options, NULL))
!= -1)
{
switch (c)
{
case 'h':
usage (argv[0]);
break;
case 'l':
show_to = 1;
break;
case 'n':
show_number = 1;
break;
case 'Q':
/* Very silent. */
be_quiet += 2;
break;
case 'q':
be_quiet = show_query = 1;
break;
case 'S':
show_summary = 1;
break;
case 's':
if (optarg)
switch (*optarg)
{
case 'r':
select_attribute |= IS_READ;
break;
case 'o':
select_attribute |= IS_OLD;
break;
case 'n':
select_attribute |= IS_NEW;
break;
}
break;
case 't':
align = 1;
break;
case 'v':
printf ("Mailutils 0.0.0: frm\n");
exit (0);
break;
default:
break;
}
}
/* have an argument */
if (optind < argc)
mailbox_name = argv[optind];
/* register the formats. */
{
list_t bookie;
registrar_get_list (&bookie);
list_append (bookie, mbox_record);
list_append (bookie, path_record);
list_append (bookie, pop_record);
list_append (bookie, imap_record);
}
/* Construct the mailbox_t, attach a notification and destroy */
{
mailbox_t mbox;
observer_t observer;
observable_t observable;
int status;
if ((status = mailbox_create_default (&mbox, mailbox_name) != 0)
|| (status = mailbox_open (mbox, MU_STREAM_READ) != 0))
{
fprintf (stderr, "could not open mailbox\n");
exit (1);
}
observer_create (&observer, mbox);
observer_set_action (observer, action, mbox);
mailbox_get_observable (mbox, &observable);
observable_attach (observable, MU_EVT_MESSAGE_ADD, observer);
mailbox_scan (mbox, 1, NULL);
observable_detach (observable, observer);
observer_destroy (&observer, mbox);
mailbox_close(mbox);
mailbox_destroy(&mbox);
}
if (show_summary && be_quiet < 1)
printf ("You have %d messages\n", counter);
if (show_query && have_new_mail)
printf ("You have new mail\n");
return 0;
}
/* alloca.c -- allocate automatically reclaimed memory
(Mostly) portable public-domain implementation -- D A Gwyn
This implementation of the PWB library alloca function,
which is used to allocate space off the run-time stack so
that it is automatically reclaimed upon procedure exit,
was inspired by discussions with J. Q. Johnson of Cornell.
J.Otto Tennant <jot@cray.com> contributed the Cray support.
There are some preprocessor constants that can
be defined when compiling for your specific system, for
improved efficiency; however, the defaults should be okay.
The general concept of this implementation is to keep
track of all alloca-allocated blocks, and reclaim any
that are found to be deeper in the stack than the current
invocation. This heuristic does not reclaim storage as
soon as it becomes invalid, but it will do so eventually.
As a special case, alloca(0) reclaims storage without
allocating any. It is a good idea to use alloca(0) in
your main control loop, etc. to force garbage collection. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef emacs
# include "blockinput.h"
#endif
/* If compiling with GCC 2, this file's not needed. */
#if !defined (__GNUC__) || __GNUC__ < 2
/* If someone has defined alloca as a macro,
there must be some other way alloca is supposed to work. */
# ifndef alloca
# ifdef emacs
# ifdef static
/* actually, only want this if static is defined as ""
-- this is for usg, in which emacs must undefine static
in order to make unexec workable
*/
# ifndef STACK_DIRECTION
you
lose
-- must know STACK_DIRECTION at compile-time
# endif /* STACK_DIRECTION undefined */
# endif /* static */
# endif /* emacs */
/* If your stack is a linked list of frames, you have to
provide an "address metric" ADDRESS_FUNCTION macro. */
# if defined (CRAY) && defined (CRAY_STACKSEG_END)
long i00afunc ();
# define ADDRESS_FUNCTION(arg) (char *) i00afunc (&(arg))
# else
# define ADDRESS_FUNCTION(arg) &(arg)
# endif
# if __STDC__
typedef void *pointer;
# else
typedef char *pointer;
# endif
# ifndef NULL
# define NULL 0
# endif
/* Different portions of Emacs need to call different versions of
malloc. The Emacs executable needs alloca to call xmalloc, because
ordinary malloc isn't protected from input signals. On the other
hand, the utilities in lib-src need alloca to call malloc; some of
them are very simple, and don't have an xmalloc routine.
Non-Emacs programs expect this to call xmalloc.
Callers below should use malloc. */
# ifndef emacs
# define malloc xmalloc
# endif
extern pointer malloc ();
/* Define STACK_DIRECTION if you know the direction of stack
growth for your system; otherwise it will be automatically
deduced at run-time.
STACK_DIRECTION > 0 => grows toward higher addresses
STACK_DIRECTION < 0 => grows toward lower addresses
STACK_DIRECTION = 0 => direction of growth unknown */
# ifndef STACK_DIRECTION
# define STACK_DIRECTION 0 /* Direction unknown. */
# endif
# if STACK_DIRECTION != 0
# define STACK_DIR STACK_DIRECTION /* Known at compile-time. */
# else /* STACK_DIRECTION == 0; need run-time code. */
static int stack_dir; /* 1 or -1 once known. */
# define STACK_DIR stack_dir
static void
find_stack_direction ()
{
static char *addr = NULL; /* Address of first `dummy', once known. */
auto char dummy; /* To get stack address. */
if (addr == NULL)
{ /* Initial entry. */
addr = ADDRESS_FUNCTION (dummy);
find_stack_direction (); /* Recurse once. */
}
else
{
/* Second entry. */
if (ADDRESS_FUNCTION (dummy) > addr)
stack_dir = 1; /* Stack grew upward. */
else
stack_dir = -1; /* Stack grew downward. */
}
}
# endif /* STACK_DIRECTION == 0 */
/* An "alloca header" is used to:
(a) chain together all alloca'ed blocks;
(b) keep track of stack depth.
It is very important that sizeof(header) agree with malloc
alignment chunk size. The following default should work okay. */
# ifndef ALIGN_SIZE
# define ALIGN_SIZE sizeof(double)
# endif
typedef union hdr
{
char align[ALIGN_SIZE]; /* To force sizeof(header). */
struct
{
union hdr *next; /* For chaining headers. */
char *deep; /* For stack depth measure. */
} h;
} header;
static header *last_alloca_header = NULL; /* -> last alloca header. */
/* Return a pointer to at least SIZE bytes of storage,
which will be automatically reclaimed upon exit from
the procedure that called alloca. Originally, this space
was supposed to be taken from the current stack frame of the
caller, but that method cannot be made to work for some
implementations of C, for example under Gould's UTX/32. */
pointer
alloca (size)
unsigned size;
{
auto char probe; /* Probes stack depth: */
register char *depth = ADDRESS_FUNCTION (probe);
# if STACK_DIRECTION == 0
if (STACK_DIR == 0) /* Unknown growth direction. */
find_stack_direction ();
# endif
/* Reclaim garbage, defined as all alloca'd storage that
was allocated from deeper in the stack than currently. */
{
register header *hp; /* Traverses linked list. */
# ifdef emacs
BLOCK_INPUT;
# endif
for (hp = last_alloca_header; hp != NULL;)
if ((STACK_DIR > 0 && hp->h.deep > depth)
|| (STACK_DIR < 0 && hp->h.deep < depth))
{
register header *np = hp->h.next;
free ((pointer) hp); /* Collect garbage. */
hp = np; /* -> next header. */
}
else
break; /* Rest are not deeper. */
last_alloca_header = hp; /* -> last valid storage. */
# ifdef emacs
UNBLOCK_INPUT;
# endif
}
if (size == 0)
return NULL; /* No allocation required. */
/* Allocate combined header + user data storage. */
{
register pointer new = malloc (sizeof (header) + size);
/* Address of header. */
((header *) new)->h.next = last_alloca_header;
((header *) new)->h.deep = depth;
last_alloca_header = (header *) new;
/* User storage begins just after header. */
return (pointer) ((char *) new + sizeof (header));
}
}
# if defined (CRAY) && defined (CRAY_STACKSEG_END)
# ifdef DEBUG_I00AFUNC
# include <stdio.h>
# endif
# ifndef CRAY_STACK
# define CRAY_STACK
# ifndef CRAY2
/* Stack structures for CRAY-1, CRAY X-MP, and CRAY Y-MP */
struct stack_control_header
{
long shgrow:32; /* Number of times stack has grown. */
long shaseg:32; /* Size of increments to stack. */
long shhwm:32; /* High water mark of stack. */
long shsize:32; /* Current size of stack (all segments). */
};
/* The stack segment linkage control information occurs at
the high-address end of a stack segment. (The stack
grows from low addresses to high addresses.) The initial
part of the stack segment linkage control information is
0200 (octal) words. This provides for register storage
for the routine which overflows the stack. */
struct stack_segment_linkage
{
long ss[0200]; /* 0200 overflow words. */
long sssize:32; /* Number of words in this segment. */
long ssbase:32; /* Offset to stack base. */
long:32;
long sspseg:32; /* Offset to linkage control of previous
segment of stack. */
long:32;
long sstcpt:32; /* Pointer to task common address block. */
long sscsnm; /* Private control structure number for
microtasking. */
long ssusr1; /* Reserved for user. */
long ssusr2; /* Reserved for user. */
long sstpid; /* Process ID for pid based multi-tasking. */
long ssgvup; /* Pointer to multitasking thread giveup. */
long sscray[7]; /* Reserved for Cray Research. */
long ssa0;
long ssa1;
long ssa2;
long ssa3;
long ssa4;
long ssa5;
long ssa6;
long ssa7;
long sss0;
long sss1;
long sss2;
long sss3;
long sss4;
long sss5;
long sss6;
long sss7;
};
# else /* CRAY2 */
/* The following structure defines the vector of words
returned by the STKSTAT library routine. */
struct stk_stat
{
long now; /* Current total stack size. */
long maxc; /* Amount of contiguous space which would
be required to satisfy the maximum
stack demand to date. */
long high_water; /* Stack high-water mark. */
long overflows; /* Number of stack overflow ($STKOFEN) calls. */
long hits; /* Number of internal buffer hits. */
long extends; /* Number of block extensions. */
long stko_mallocs; /* Block allocations by $STKOFEN. */
long underflows; /* Number of stack underflow calls ($STKRETN). */
long stko_free; /* Number of deallocations by $STKRETN. */
long stkm_free; /* Number of deallocations by $STKMRET. */
long segments; /* Current number of stack segments. */
long maxs; /* Maximum number of stack segments so far. */
long pad_size; /* Stack pad size. */
long current_address; /* Current stack segment address. */
long current_size; /* Current stack segment size. This
number is actually corrupted by STKSTAT to
include the fifteen word trailer area. */
long initial_address; /* Address of initial segment. */
long initial_size; /* Size of initial segment. */
};
/* The following structure describes the data structure which trails
any stack segment. I think that the description in 'asdef' is
out of date. I only describe the parts that I am sure about. */
struct stk_trailer
{
long this_address; /* Address of this block. */
long this_size; /* Size of this block (does not include
this trailer). */
long unknown2;
long unknown3;
long link; /* Address of trailer block of previous
segment. */
long unknown5;
long unknown6;
long unknown7;
long unknown8;
long unknown9;
long unknown10;
long unknown11;
long unknown12;
long unknown13;
long unknown14;
};
# endif /* CRAY2 */
# endif /* not CRAY_STACK */
# ifdef CRAY2
/* Determine a "stack measure" for an arbitrary ADDRESS.
I doubt that "lint" will like this much. */
static long
i00afunc (long *address)
{
struct stk_stat status;
struct stk_trailer *trailer;
long *block, size;
long result = 0;
/* We want to iterate through all of the segments. The first
step is to get the stack status structure. We could do this
more quickly and more directly, perhaps, by referencing the
$LM00 common block, but I know that this works. */
STKSTAT (&status);
/* Set up the iteration. */
trailer = (struct stk_trailer *) (status.current_address
+ status.current_size
- 15);
/* There must be at least one stack segment. Therefore it is
a fatal error if "trailer" is null. */
if (trailer == 0)
abort ();
/* Discard segments that do not contain our argument address. */
while (trailer != 0)
{
block = (long *) trailer->this_address;
size = trailer->this_size;
if (block == 0 || size == 0)
abort ();
trailer = (struct stk_trailer *) trailer->link;
if ((block <= address) && (address < (block + size)))
break;
}
/* Set the result to the offset in this segment and add the sizes
of all predecessor segments. */
result = address - block;
if (trailer == 0)
{
return result;
}
do
{
if (trailer->this_size <= 0)
abort ();
result += trailer->this_size;
trailer = (struct stk_trailer *) trailer->link;
}
while (trailer != 0);
/* We are done. Note that if you present a bogus address (one
not in any segment), you will get a different number back, formed
from subtracting the address of the first block. This is probably
not what you want. */
return (result);
}
# else /* not CRAY2 */
/* Stack address function for a CRAY-1, CRAY X-MP, or CRAY Y-MP.
Determine the number of the cell within the stack,
given the address of the cell. The purpose of this
routine is to linearize, in some sense, stack addresses
for alloca. */
static long
i00afunc (long address)
{
long stkl = 0;
long size, pseg, this_segment, stack;
long result = 0;
struct stack_segment_linkage *ssptr;
/* Register B67 contains the address of the end of the
current stack segment. If you (as a subprogram) store
your registers on the stack and find that you are past
the contents of B67, you have overflowed the segment.
B67 also points to the stack segment linkage control
area, which is what we are really interested in. */
stkl = CRAY_STACKSEG_END ();
ssptr = (struct stack_segment_linkage *) stkl;
/* If one subtracts 'size' from the end of the segment,
one has the address of the first word of the segment.
If this is not the first segment, 'pseg' will be
nonzero. */
pseg = ssptr->sspseg;
size = ssptr->sssize;
this_segment = stkl - size;
/* It is possible that calling this routine itself caused
a stack overflow. Discard stack segments which do not
contain the target address. */
while (!(this_segment <= address && address <= stkl))
{
# ifdef DEBUG_I00AFUNC
fprintf (stderr, "%011o %011o %011o\n", this_segment, address, stkl);
# endif
if (pseg == 0)
break;
stkl = stkl - pseg;
ssptr = (struct stack_segment_linkage *) stkl;
size = ssptr->sssize;
pseg = ssptr->sspseg;
this_segment = stkl - size;
}
result = address - this_segment;
/* If you subtract pseg from the current end of the stack,
you get the address of the previous stack segment's end.
This seems a little convoluted to me, but I'll bet you save
a cycle somewhere. */
while (pseg != 0)
{
# ifdef DEBUG_I00AFUNC
fprintf (stderr, "%011o %011o\n", pseg, size);
# endif
stkl = stkl - pseg;
ssptr = (struct stack_segment_linkage *) stkl;
size = ssptr->sssize;
pseg = ssptr->sspseg;
result += size;
}
return (result);
}
# endif /* not CRAY2 */
# endif /* CRAY */
# endif /* no alloca */
#endif /* not GCC version 2 */
......@@ -17,6 +17,9 @@
/* Tell GLIBC that we want UNIX98 pthread_rwlock_xx() functions. */
#define _XOPEN_SOURCE 500
/* Tell QNX/Neutrino to define pthread_rwlock_xx() functions. */
#define _QNX_SOURCE
#define _POSIX_C_SOURCE 199506
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
......