Fix uip/whom.c for C89 compatibility
[mmh] / uip / mhstore.c
index 4a17547..47b7c02 100644 (file)
@@ -9,70 +9,42 @@
 #include <h/mh.h>
 #include <fcntl.h>
 #include <h/signals.h>
-#include <h/md5.h>
 #include <errno.h>
 #include <signal.h>
-#include <h/mts.h>
 #include <h/tws.h>
 #include <h/mime.h>
 #include <h/mhparse.h>
-#include <h/mhcachesbr.h>
 #include <h/utils.h>
-
-#ifdef HAVE_SYS_WAIT_H
-# include <sys/wait.h>
-#endif
+#include <unistd.h>
+#include <sys/stat.h>
+#include <locale.h>
+#include <sysexits.h>
 
 static struct swit switches[] = {
 #define AUTOSW  0
        { "auto", 0 },
 #define NAUTOSW  1
-       { "noauto", 0 },
-#define CHECKSW  2
-       { "check", 0 },
-#define NCHECKSW  3
-       { "nocheck", 0 },
-#define VERBSW  4
-       { "verbose", 0 },
-#define NVERBSW  5
-       { "noverbose", 0 },
-#define FILESW  6  /* interface from show */
+       { "noauto", 2 },
+#define FILESW  2  /* interface from show */
        { "file file", 0 },
-#define PARTSW  7
+#define PARTSW  3
        { "part number", 0 },
-#define TYPESW  8
+#define TYPESW  4
        { "type content", 0 },
-#define RCACHESW  9
-       { "rcache policy", 0 },
-#define WCACHESW  10
-       { "wcache policy", 0 },
-#define VERSIONSW  11
-       { "version", 0 },
-#define HELPSW  12
+#define VERSIONSW  5
+       { "Version", 0 },
+#define HELPSW  6
        { "help", 0 },
-
-/*
-** switches for debugging
-*/
-#define DEBUGSW  13
+#define DEBUGSW  7
        { "debug", -5 },
        { NULL, 0 }
 };
 
+char *version=VERSION;
 
 /* mhparse.c */
 extern char *tmp;  /* directory to place temp files */
 
-/* mhcachesbr.c */
-extern int rcachesw;
-extern int wcachesw;
-extern char *cache_public;
-extern char *cache_private;
-
-/* mhstoresbr.c */
-extern int autosw;
-extern char *cwd;  /* cache current working directory */
-
 /* mhmisc.c */
 extern int npart;
 extern int ntype;
@@ -81,7 +53,6 @@ extern char *types[NTYPES + 1];
 extern int userrs;
 
 int debugsw = 0;
-int verbosw = 0;
 
 #define quitser pipeser
 
@@ -94,24 +65,67 @@ int type_ok(CT, int);
 void set_endian(void);
 void flush_errors(void);
 
-/* mhstoresbr.c */
-void store_all_messages(CT *);
-
 /* mhfree.c */
 void free_content(CT);
-extern CT *cts;
-void freects_done(int) NORETURN;
+extern CT *cts;  /* The list of top-level contents to display */
+void freects_done();
+
+/*
+** static prototypes
+*/
+static void pipeser(int);
+
+int autosw = 1;
+
+/*
+** Cache of current directory.  This must be
+** set before these routines are called.
+*/
+char *cwd;
+
+/*
+** The directory in which to store the contents.
+*/
+static char *dir;
+
+/*
+** Type for a compare function for qsort.  This keeps
+** the compiler happy.
+*/
+typedef int (*qsort_comp) (const void *, const void *);
+
+
+/* mhmisc.c */
+int part_ok(CT, int);
+int type_ok(CT, int);
+int make_intermediates(char *);
+void flush_errors(void);
+
+/* mhshowsbr.c */
+int show_content_aux(CT, int, char *, char *);
 
 /*
 ** static prototypes
 */
-static RETSIGTYPE pipeser(int);
+static void store_single_message(CT);
+static int store_switch(CT);
+static int store_generic(CT);
+static int store_multi(CT);
+static int store_partial(CT);
+static int store_external(CT);
+static int ct_compar(CT *, CT *);
+static int store_content(CT, CT);
+static int output_content_file(CT, int);
+static int output_content_folder(char *, char *);
+static int parse_format_string(CT, char *, char *, int, char *);
+static int copy_some_headers(FILE *, CT);
+static void store_all_messages(CT *);
 
 
 int
 main(int argc, char **argv)
 {
-       int msgnum, *icachesw;
+       int msgnum;
        char *cp, *file = NULL, *folder = NULL;
        char *maildir, buf[100], **argp;
        char **arguments;
@@ -120,11 +134,11 @@ main(int argc, char **argv)
        CT ct, *ctp;
        FILE *fp;
 
-       done=freects_done;
+       if (atexit(freects_done) != 0) {
+               adios(EX_OSERR, NULL, "atexit failed");
+       }
 
-#ifdef LOCALE
        setlocale(LC_ALL, "");
-#endif
        invo_name = mhbasename(argv[0]);
 
        /* read user profile/context */
@@ -141,17 +155,17 @@ main(int argc, char **argv)
                        switch (smatch(++cp, switches)) {
                        case AMBIGSW:
                                ambigsw(cp, switches);
-                               done(1);
+                               exit(EX_USAGE);
                        case UNKWNSW:
-                               adios(NULL, "-%s unknown", cp);
+                               adios(EX_USAGE, NULL, "-%s unknown", cp);
 
                        case HELPSW:
                                snprintf(buf, sizeof(buf), "%s [+folder] [msgs] [switches]", invo_name);
                                print_help(buf, switches, 1);
-                               done(1);
+                               exit(argc == 2 ? EX_OK : EX_USAGE);
                        case VERSIONSW:
                                print_version(invo_name);
-                               done(1);
+                               exit(argc == 2 ? EX_OK : EX_USAGE);
 
                        case AUTOSW:
                                autosw++;
@@ -160,64 +174,31 @@ main(int argc, char **argv)
                                autosw = 0;
                                continue;
 
-                       case RCACHESW:
-                               icachesw = &rcachesw;
-                               goto do_cache;
-                       case WCACHESW:
-                               icachesw = &wcachesw;
-do_cache:
-                               if (!(cp = *argp++) || *cp == '-')
-                                       adios(NULL, "missing argument to %s",
-                                                       argp[-2]);
-                               switch (*icachesw = smatch(cp, caches)) {
-                               case AMBIGSW:
-                                       ambigsw(cp, caches);
-                                       done(1);
-                               case UNKWNSW:
-                                       adios(NULL, "%s unknown", cp);
-                               default:
-                                       break;
-                               }
-                               continue;
-
-                       case CHECKSW:
-                               checksw++;
-                               continue;
-                       case NCHECKSW:
-                               checksw = 0;
-                               continue;
-
                        case PARTSW:
                                if (!(cp = *argp++) || *cp == '-')
-                                       adios(NULL, "missing argument to %s",
+                                       adios(EX_USAGE, NULL, "missing argument to %s",
                                                        argp[-2]);
                                if (npart >= NPARTS)
-                                       adios(NULL, "too many parts (starting with %s), %d max", cp, NPARTS);
+                                       adios(EX_USAGE, NULL, "too many parts (starting with %s), %d max", cp, NPARTS);
                                parts[npart++] = cp;
                                continue;
 
                        case TYPESW:
                                if (!(cp = *argp++) || *cp == '-')
-                                       adios(NULL, "missing argument to %s",
+                                       adios(EX_USAGE, NULL, "missing argument to %s",
                                                        argp[-2]);
                                if (ntype >= NTYPES)
-                                       adios(NULL, "too many types (starting with %s), %d max", cp, NTYPES);
+                                       adios(EX_USAGE, NULL, "too many types (starting with %s), %d max", cp, NTYPES);
                                types[ntype++] = cp;
                                continue;
 
                        case FILESW:
                                if (!(cp = *argp++) || (*cp == '-' && cp[1]))
-                                       adios(NULL, "missing argument to %s",
+                                       adios(EX_USAGE, NULL, "missing argument to %s",
                                                        argp[-2]);
-                               file = *cp == '-' ? cp : path(cp, TFILE);
+                               file = *cp == '-' ? cp : mh_xstrdup(expanddir(cp));
                                continue;
 
-                       case VERBSW:
-                               verbosw = 1;
-                               continue;
-                       case NVERBSW:
-                               verbosw = 0;
-                               continue;
                        case DEBUGSW:
                                debugsw = 1;
                                continue;
@@ -225,11 +206,11 @@ do_cache:
                }
                if (*cp == '+' || *cp == '@') {
                        if (folder)
-                               adios(NULL, "only one folder at a time!");
+                               adios(EX_USAGE, NULL, "only one folder at a time!");
                        else
-                               folder = pluspath(cp);
+                               folder = mh_xstrdup(expandfol(cp));
                } else
-                               app_msgarg(&msgs, cp);
+                       app_msgarg(&msgs, cp);
        }
 
        /* null terminate the list of acceptable parts/types */
@@ -259,19 +240,10 @@ do_cache:
                fclose(fp);
        }
 
-       /* Check for public cache location */
-       if ((cache_public = context_find(nmhcache)) && *cache_public != '/')
-               cache_public = NULL;
-
-       /* Check for private cache location */
-       if (!(cache_private = context_find(nmhprivcache)))
-               cache_private = ".cache";
-       cache_private = getcpy(m_maildir(cache_private));
-
        /*
        ** Cache the current directory before we do any chdirs()'s.
        */
-       cwd = getcpy(pwd());
+       cwd = mh_xstrdup(pwd());
 
        /*
        ** Check for storage directory.  If specified,
@@ -281,51 +253,48 @@ do_cache:
        if ((cp = context_find(nmhstorage)) && *cp)
                tmp = concat(cp, "/", invo_name, NULL);
        else
-               tmp = add(m_maildir(invo_name), NULL);
+               tmp = mh_xstrdup(toabsdir(invo_name));
 
        if (file && msgs.size)
-               adios(NULL, "cannot specify msg and file at same time!");
+               adios(EX_USAGE, NULL, "cannot specify msg and file at same time!");
 
        /*
        ** check if message is coming from file
        */
        if (file) {
-               if (!(cts = (CT *) calloc((size_t) 2, sizeof(*cts))))
-                       adios(NULL, "out of memory");
+               cts = mh_xcalloc(2, sizeof(*cts));
                ctp = cts;
 
-               if ((ct = parse_mime(file)));
+               if ((ct = parse_mime(file)))
                        *ctp++ = ct;
        } else {
                /*
                ** message(s) are coming from a folder
                */
                if (!msgs.size)
-                       app_msgarg(&msgs, "cur");
+                       app_msgarg(&msgs, seq_cur);
                if (!folder)
-                       folder = getfolder(FCUR);
-               maildir = m_maildir(folder);
+                       folder = getcurfol();
+               maildir = toabsdir(folder);
 
                if (chdir(maildir) == NOTOK)
-                       adios(maildir, "unable to change directory to");
+                       adios(EX_OSERR, maildir, "unable to change directory to");
 
                /* read folder and create message structure */
                if (!(mp = folder_read(folder)))
-                       adios(NULL, "unable to read folder %s", folder);
+                       adios(EX_IOERR, NULL, "unable to read folder %s", folder);
 
                /* check for empty folder */
                if (mp->nummsg == 0)
-                       adios(NULL, "no messages in %s", folder);
+                       adios(EX_DATAERR, NULL, "no messages in %s", folder);
 
                /* parse all the message ranges/sequences and set SELECTED */
                for (msgnum = 0; msgnum < msgs.size; msgnum++)
                        if (!m_convert(mp, msgs.msgs[msgnum]))
-                               done(1);
+                               exit(EX_USAGE);
                seq_setprev(mp);  /* set the previous-sequence */
 
-               if (!(cts = (CT *) calloc((size_t) (mp->numsel + 1),
-                               sizeof(*cts))))
-                       adios(NULL, "out of memory");
+               cts = mh_xcalloc(mp->numsel + 1, sizeof(*cts));
                ctp = cts;
 
                for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
@@ -340,7 +309,7 @@ do_cache:
        }
 
        if (!*cts)
-               done(1);
+               exit(EX_SOFTWARE);
 
        userrs = 1;
        SIGNAL(SIGQUIT, quitser);
@@ -370,23 +339,21 @@ do_cache:
        for (ctp = cts; *ctp; ctp++)
                free_content(*ctp);
 
-       free((char *) cts);
-       cts = NULL;
+       mh_free0(&cts);
 
        /* If reading from a folder, do some updating */
        if (mp) {
-               context_replace(pfolder, folder);  /* update current folder */
+               context_replace(curfolder, folder); /* update current folder */
                seq_setcur(mp, mp->hghsel);  /* update current message */
                seq_save(mp);  /* synchronize sequences  */
                context_save();  /* save the context file  */
        }
 
-       done(0);
-       return 1;
+       return 0;
 }
 
 
-static RETSIGTYPE
+static void
 pipeser(int i)
 {
        if (i == SIGQUIT) {
@@ -394,8 +361,914 @@ pipeser(int i)
                fflush(stdout);
                fprintf(stderr, "\n");
                fflush(stderr);
+               exit(EX_TEMPFAIL);
        }
 
-       done(1);
+       exit(EX_IOERR);
        /* NOTREACHED */
 }
+
+
+/*
+** Main entry point to store content from a collection of messages.
+*/
+static void
+store_all_messages(CT *cts)
+{
+       CT ct, *ctp;
+       char *cp;
+
+       /*
+       ** Check for the directory in which to
+       ** store any contents.
+       */
+       if ((cp = context_find(nmhstorage)) && *cp)
+               dir = mh_xstrdup(cp);
+       else
+               dir = mh_xstrdup(cwd);
+
+       for (ctp = cts; *ctp; ctp++) {
+               ct = *ctp;
+               store_single_message(ct);
+       }
+
+       flush_errors();
+}
+
+
+/*
+** Entry point to store the content
+** in a (single) message
+*/
+
+static void
+store_single_message(CT ct)
+{
+       if (type_ok(ct, 1)) {
+               umask(ct->c_umask);
+               store_switch(ct);
+               if (ct->c_fp) {
+                       fclose(ct->c_fp);
+                       ct->c_fp = NULL;
+               }
+               if (ct->c_ceclosefnx)
+                       (*ct->c_ceclosefnx) (ct);
+       }
+}
+
+
+/*
+** Switching routine to store different content types
+*/
+
+static int
+store_switch(CT ct)
+{
+       switch (ct->c_type) {
+       case CT_MULTIPART:
+               return store_multi(ct);
+               break;
+
+       case CT_MESSAGE:
+               switch (ct->c_subtype) {
+               case MESSAGE_PARTIAL:
+                       return store_partial(ct);
+                       break;
+
+               case MESSAGE_EXTERNAL:
+                       return store_external(ct);
+
+               case MESSAGE_RFC822:
+               default:
+                       return store_generic(ct);
+                       break;
+               }
+               break;
+
+       case CT_APPLICATION:
+       case CT_TEXT:
+       case CT_AUDIO:
+       case CT_IMAGE:
+       case CT_VIDEO:
+               return store_generic(ct);
+               break;
+
+       default:
+               adios(EX_DATAERR, NULL, "unknown content type %d", ct->c_type);
+               break;
+       }
+
+       return OK;  /* NOT REACHED */
+}
+
+
+/*
+** Generic routine to store a MIME content.
+** (application, audio, video, image, text, message/rfc922)
+*/
+static int
+store_generic(CT ct)
+{
+       char **ap, **vp, *cp, *filename;
+       CI ci = &ct->c_ctinfo;
+
+       /*
+       ** Check if the content specifies a filename in its MIME parameters.
+       ** Don't bother with this for type "message"
+       ** (only the "message" subtype "rfc822" will use store_generic).
+       */
+       if (autosw && ct->c_type != CT_MESSAGE) {
+               /* First check for "filename" in Content-Disposition header */
+               filename = extract_name_value("filename", ct->c_dispo);
+               if (filename && strcmp(filename, ct->c_dispo)!=0) {
+                       /* We found "filename" */
+                       cp = mhbasename(filename);
+                       if (*cp && *cp!='.' && *cp!='|' && *cp!='!' &&
+                                       !strchr(cp, '%')) {
+                               /* filename looks good: use it */
+                               ct->c_storeproc = mh_xstrdup(cp);
+                               goto finished;
+                       }
+               }
+               /*
+               ** Check the attribute/value pairs, for the attribute "name".
+               ** If found, take the basename, do a few sanity checks and
+               ** copy the value into c_storeproc.
+               */
+               for (ap = ci->ci_attrs, vp = ci->ci_values; *ap; ap++,vp++) {
+                       if (mh_strcasecmp(*ap, "name")!=0) {
+                               continue;
+                       }
+                       cp = mhbasename(*vp);
+                       if (*cp && *cp!='.' && *cp!='|' && *cp!='!' &&
+                                       !strchr(cp, '%')) {
+                               /* filename looks good: use it */
+                               ct->c_storeproc = mh_xstrdup(cp);
+                       }
+                       break;
+               }
+       }
+
+finished:
+       return store_content(ct, NULL);
+}
+
+
+/*
+** Store the content of a multipart message
+*/
+
+static int
+store_multi(CT ct)
+{
+       int result;
+       struct multipart *m = (struct multipart *) ct->c_ctparams;
+       struct part *part;
+
+       result = NOTOK;
+       for (part = m->mp_parts; part; part = part->mp_next) {
+               CT  p = part->mp_part;
+
+               if (part_ok(p, 1) && type_ok(p, 1)) {
+                       result = store_switch(p);
+                       if (result == OK && ct->c_subtype == MULTI_ALTERNATE)
+                               break;
+               }
+       }
+
+       return result;
+}
+
+
+/*
+** Reassemble and store the contents of a collection
+** of messages of type "message/partial".
+*/
+
+static int
+store_partial(CT ct)
+{
+       int cur, hi, i;
+       CT p, *ctp, *ctq;
+       CT *base;
+       struct partial *pm, *qm;
+
+       qm = (struct partial *) ct->c_ctparams;
+       if (qm->pm_stored)
+               return OK;
+
+       hi = i = 0;
+       for (ctp = cts; *ctp; ctp++) {
+               p = *ctp;
+               if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
+                       pm = (struct partial *) p->c_ctparams;
+                       if (!pm->pm_stored &&
+                                       strcmp(qm->pm_partid, pm->pm_partid)
+                                       == 0) {
+                               pm->pm_marked = pm->pm_partno;
+                               if (pm->pm_maxno)
+                                       hi = pm->pm_maxno;
+                               pm->pm_stored = 1;
+                               i++;
+                       } else
+                               pm->pm_marked = 0;
+               }
+       }
+
+       if (hi == 0) {
+               advise(NULL, "missing (at least) last part of multipart message");
+               return NOTOK;
+       }
+
+       base = mh_xcalloc(i + 1, sizeof(*base));
+
+       ctq = base;
+       for (ctp = cts; *ctp; ctp++) {
+               p = *ctp;
+               if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
+                       pm = (struct partial *) p->c_ctparams;
+                       if (pm->pm_marked)
+                               *ctq++ = p;
+               }
+       }
+       *ctq = NULL;
+
+       if (i > 1)
+               qsort((char *) base, i, sizeof(*base), (qsort_comp) ct_compar);
+
+       cur = 1;
+       for (ctq = base; *ctq; ctq++) {
+               p = *ctq;
+               pm = (struct partial *) p->c_ctparams;
+               if (pm->pm_marked != cur) {
+                       if (pm->pm_marked == cur - 1) {
+                               admonish(NULL, "duplicate part %d of %d part multipart message", pm->pm_marked, hi);
+                               continue;
+                       }
+
+missing_part:
+                       advise (NULL, "missing %spart %d of %d part multipart message", cur != hi ? "(at least) " : "", cur, hi);
+                       goto losing;
+               } else
+                       cur++;
+       }
+       if (hi != --cur) {
+               cur = hi;
+               goto missing_part;
+       }
+
+       /*
+       ** Now cycle through the sorted list of messages of type
+       ** "message/partial" and save/append them to a file.
+       */
+
+       ctq = base;
+       ct = *ctq++;
+       if (store_content(ct, NULL) == NOTOK) {
+losing:
+               mh_free0(&base);
+               return NOTOK;
+       }
+
+       for (; *ctq; ctq++) {
+               p = *ctq;
+               if (store_content(p, ct) == NOTOK)
+                       goto losing;
+       }
+
+       mh_free0(&base);
+       return OK;
+}
+
+
+/*
+** Show how to retrieve content of type "message/external".
+*/
+static int
+store_external(CT ct)
+{
+       char **ap, **ep;
+       char *msg;
+       FILE *fp;
+       char buf[BUFSIZ];
+
+       msg = add("You need to fetch the contents yourself:", NULL);
+       ap = ct->c_ctinfo.ci_attrs;
+       ep = ct->c_ctinfo.ci_values;
+       for (; *ap; ap++, ep++) {
+               msg = add(concat("\n\t", *ap, ": ", *ep, NULL), msg);
+       }
+       if (!(fp = fopen(ct->c_file, "r"))) {
+               adios(EX_IOERR, ct->c_file, "unable to open");
+       }
+       fseek(fp, ct->c_begin, SEEK_SET);
+       while (!feof(fp) && ftell(fp) < ct->c_end) {
+               if (!fgets(buf, sizeof buf, fp)) {
+                       adios(EX_IOERR, ct->c_file, "unable to read");
+               }
+               *strchr(buf, '\n') = '\0';
+               msg = add(concat("\n\t", buf, NULL), msg);
+       }
+       fclose(fp);
+       advise(NULL, msg);
+       return OK;
+}
+
+
+/*
+** Compare the numbering from two different
+** message/partials (needed for sorting).
+*/
+
+static int
+ct_compar(CT *a, CT *b)
+{
+       struct partial *am = (struct partial *) ((*a)->c_ctparams);
+       struct partial *bm = (struct partial *) ((*b)->c_ctparams);
+
+       return (am->pm_marked - bm->pm_marked);
+}
+
+
+/*
+** Store contents of a message or message part to
+** a folder, a file, the standard output, or pass
+** the contents to a command.
+**
+** If the current content to be saved is a followup part
+** to a collection of messages of type "message/partial",
+** then field "p" is a pointer to the Content structure
+** to the first message/partial in the group.
+*/
+
+static int
+store_content(CT ct, CT p)
+{
+       int appending = 0, msgnum = 0;
+       int is_partial = 0, first_partial = 0;
+       int last_partial = 0;
+       char *cp, buffer[BUFSIZ];
+
+       /*
+       ** Do special processing for messages of
+       ** type "message/partial".
+       **
+       ** We first check if this content is of type
+       ** "message/partial".  If it is, then we need to check
+       ** whether it is the first and/or last in the group.
+       **
+       ** Then if "p" is a valid pointer, it points to the Content
+       ** structure of the first partial in the group.  So we copy
+       ** the file name and/or folder name from that message.  In
+       ** this case, we also note that we will be appending.
+       */
+       if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
+               struct partial *pm = (struct partial *) ct->c_ctparams;
+
+               /* Yep, it's a message/partial */
+               is_partial = 1;
+
+               /* But is it the first and/or last in the collection? */
+               if (pm->pm_partno == 1)
+                       first_partial = 1;
+               if (pm->pm_maxno && pm->pm_partno == pm->pm_maxno)
+                       last_partial = 1;
+
+               /*
+               ** If "p" is a valid pointer, then it points to the
+               ** Content structure for the first message in the group.
+               ** So we just copy the filename or foldername information
+               ** from the previous iteration of this function.
+               */
+               if (p) {
+                       appending = 1;
+                       ct->c_storage = mh_xstrdup(p->c_storage);
+
+                       /* record the folder name */
+                       if (p->c_folder) {
+                               ct->c_folder = mh_xstrdup(p->c_folder);
+                       }
+                       goto got_filename;
+               }
+       }
+
+       /*
+       ** Get storage formatting string.
+       **
+       ** 1) If we have storeproc defined, then use that
+       ** 2) Else check for a mhstore-store-<type>/<subtype> entry
+       ** 3) Else check for a mhstore-store-<type> entry
+       ** 4) Else if content is "message", use "+" (current folder)
+       ** 5) Else use string "%m%P.%s".
+       */
+       if (!(cp = ct->c_storeproc) || !*cp) {
+               CI ci = &ct->c_ctinfo;
+
+               snprintf(buffer, sizeof(buffer), "%s-store-%s/%s",
+                               invo_name, ci->ci_type, ci->ci_subtype);
+               if ((cp = context_find(buffer)) == NULL || *cp == '\0') {
+                       snprintf(buffer, sizeof(buffer), "%s-store-%s",
+                                       invo_name, ci->ci_type);
+                       if ((cp = context_find(buffer)) == NULL ||
+                                       *cp == '\0') {
+                               cp = ct->c_type == CT_MESSAGE ?
+                                               "+" : "%m%P.%s";
+                       }
+               }
+       }
+
+       /*
+       ** Check the beginning of storage formatting string
+       ** to see if we are saving content to a folder.
+       */
+       if (*cp == '+' || *cp == '@') {
+               char *tmpfilenam, *folder;
+
+               /* Store content in temporary file for now */
+               tmpfilenam = m_mktemp(invo_name, NULL, NULL);
+               ct->c_storage = mh_xstrdup(tmpfilenam);
+
+               /* Get the folder name */
+               if (cp[1])
+                       folder = mh_xstrdup(expandfol(cp));
+               else
+                       folder = getcurfol();
+
+               /* Check if folder exists */
+               create_folder(toabsdir(folder), 0, exit);
+
+               /* Record the folder name */
+               ct->c_folder = mh_xstrdup(folder);
+
+               if (cp[1])
+                       mh_free0(&folder);
+
+               goto got_filename;
+       }
+
+       /*
+       ** Parse and expand the storage formatting string
+       ** in `cp' into `buffer'.
+       */
+       parse_format_string(ct, cp, buffer, sizeof(buffer), dir);
+
+       /*
+       ** If formatting begins with '|' or '!', then pass
+       ** content to standard input of a command and return.
+       */
+       if (buffer[0] == '|' || buffer[0] == '!')
+               return show_content_aux(ct, 0, buffer + 1, dir);
+
+       /* record the filename */
+       ct->c_storage = mh_xstrdup(buffer);
+
+got_filename:
+       /* flush the output stream */
+       fflush(stdout);
+
+       /* Now save or append the content to a file */
+       if (output_content_file(ct, appending) == NOTOK)
+               return NOTOK;
+
+       /*
+       ** If necessary, link the file into a folder and remove
+       ** the temporary file.  If this message is a partial,
+       ** then only do this if it is the last one in the group.
+       */
+       if (ct->c_folder && (!is_partial || last_partial)) {
+               msgnum = output_content_folder(ct->c_folder, ct->c_storage);
+               unlink(ct->c_storage);
+               if (msgnum == NOTOK)
+                       return NOTOK;
+       }
+
+       /*
+       ** Now print out the name/number of the message
+       ** that we are storing.
+       */
+       if (is_partial) {
+               if (first_partial)
+                       fprintf(stderr, "reassembling partials ");
+               if (last_partial)
+                       fprintf(stderr, "%s", ct->c_file);
+               else
+                       fprintf(stderr, "%s,", ct->c_file);
+       } else {
+               fprintf(stderr, "storing message %s", ct->c_file);
+               if (ct->c_partno)
+                       fprintf(stderr, " part %s", ct->c_partno);
+       }
+
+       /*
+       ** Unless we are in the "middle" of group of message/partials,
+       ** we now print the name of the file, folder, and/or message
+       ** to which we are storing the content.
+       */
+       if (!is_partial || last_partial) {
+               if (ct->c_folder) {
+                       fprintf(stderr, " to folder %s as message %d\n",
+                                       ct->c_folder, msgnum);
+               } else if (strcmp(ct->c_storage, "-")==0) {
+                       fprintf(stderr, " to stdout\n");
+               } else {
+                       int cwdlen;
+
+                       cwdlen = strlen(cwd);
+                       fprintf(stderr, " as file %s\n",
+                                       strncmp(ct->c_storage, cwd,
+                                       cwdlen)!=0 ||
+                                       ct->c_storage[cwdlen] != '/' ?
+                                       ct->c_storage :
+                                       ct->c_storage + cwdlen + 1);
+               }
+       }
+
+       return OK;
+}
+
+
+/*
+** Output content to a file
+*/
+
+static int
+output_content_file(CT ct, int appending)
+{
+       int filterstate;
+       char *file, buffer[BUFSIZ];
+       long pos, last;
+       FILE *fp;
+
+       /*
+       ** If the pathname contains directories, make sure
+       ** all of them exist.
+       */
+       if (strchr(ct->c_storage, '/') && make_intermediates(ct->c_storage)
+                       == NOTOK)
+               return NOTOK;
+
+       if (ct->c_encoding != CE_7BIT) {
+               int cc, fd;
+
+               if (!ct->c_ceopenfnx) {
+                       advise(NULL, "don't know how to decode part %s of message %s", ct->c_partno, ct->c_file);
+                       return NOTOK;
+               }
+
+               file = appending || strcmp(ct->c_storage, "-")==0 ?
+                               NULL : ct->c_storage;
+               if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
+                       return NOTOK;
+               if (strcmp(file, ct->c_storage)==0) {
+                       (*ct->c_ceclosefnx) (ct);
+                       return OK;
+               }
+
+               /*
+               ** Send to standard output
+               */
+               if (strcmp(ct->c_storage, "-")==0) {
+                       int gd;
+
+                       if ((gd = dup(fileno(stdout))) == NOTOK) {
+                               advise("stdout", "unable to dup");
+losing:
+                               (*ct->c_ceclosefnx) (ct);
+                               return NOTOK;
+                       }
+                       if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
+                               advise("stdout", "unable to fdopen (%d, \"%s\") from", gd, appending ? "a" : "w");
+                               close(gd);
+                               goto losing;
+                       }
+               } else {
+                       /*
+                       ** Open output file
+                       */
+                       if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
+                                       == NULL) {
+                               advise(ct->c_storage, "unable to fopen for %s",
+                                               appending ?
+                                               "appending" : "writing");
+                               goto losing;
+                       }
+               }
+
+               /*
+               ** Filter the header fields of the initial enclosing
+               ** message/partial into the file.
+               */
+               if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
+                       struct partial *pm = (struct partial *) ct->c_ctparams;
+
+                       if (pm->pm_partno == 1)
+                               copy_some_headers(fp, ct);
+               }
+
+               for (;;) {
+                       switch (cc = read(fd, buffer, sizeof(buffer))) {
+                       case NOTOK:
+                               advise(file, "error reading content from");
+                               break;
+
+                       case OK:
+                               break;
+
+                       default:
+                               fwrite(buffer, sizeof(*buffer), cc, fp);
+                               continue;
+                       }
+                       break;
+               }
+
+               (*ct->c_ceclosefnx) (ct);
+
+               if (cc != NOTOK && fflush(fp))
+                       advise(ct->c_storage, "error writing to");
+
+               fclose(fp);
+
+               return (cc != NOTOK ? OK : NOTOK);
+       }
+
+       if (!ct->c_fp && (ct->c_fp = fopen(ct->c_file, "r")) == NULL) {
+               advise(ct->c_file, "unable to open for reading");
+               return NOTOK;
+       }
+
+       pos = ct->c_begin;
+       last = ct->c_end;
+       fseek(ct->c_fp, pos, SEEK_SET);
+
+       if (strcmp(ct->c_storage, "-")==0) {
+               int gd;
+
+               if ((gd = dup(fileno(stdout))) == NOTOK) {
+                       advise("stdout", "unable to dup");
+                       return NOTOK;
+               }
+               if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
+                       advise("stdout", "unable to fdopen (%d, \"%s\") from",
+                                       gd, appending ? "a" : "w");
+                       close(gd);
+                       return NOTOK;
+               }
+       } else {
+               if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
+                               == NULL) {
+                       advise(ct->c_storage, "unable to fopen for %s",
+                                       appending ? "appending" : "writing");
+                       return NOTOK;
+               }
+       }
+
+       /*
+       ** Copy a few of the header fields of the initial
+       ** enclosing message/partial into the file.
+       */
+       filterstate = 0;
+       if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
+               struct partial *pm = (struct partial *) ct->c_ctparams;
+
+               if (pm->pm_partno == 1) {
+                       copy_some_headers(fp, ct);
+                       filterstate = 1;
+               }
+       }
+
+       while (fgets(buffer, sizeof(buffer) - 1, ct->c_fp)) {
+               if ((pos += strlen(buffer)) > last) {
+                       int diff;
+
+                       diff = strlen(buffer) - (pos - last);
+                       if (diff >= 0)
+                               buffer[diff] = '\0';
+               }
+               /*
+               ** If this is the first content of a group of
+               ** message/partial contents, then we only copy a few
+               ** of the header fields of the enclosed message.
+               */
+               if (filterstate) {
+                       switch (buffer[0]) {
+                       case ' ':
+                       case '\t':
+                               if (filterstate < 0)
+                                       buffer[0] = 0;
+                               break;
+
+                       case '\n':
+                               filterstate = 0;
+                               break;
+
+                       default:
+                               if (!uprf(buffer, XXX_FIELD_PRF) && !uprf(buffer, VRSN_FIELD) && !uprf(buffer, "Subject:") && !uprf(buffer, "Message-ID:")) {
+                                       filterstate = -1;
+                                       buffer[0] = 0;
+                                       break;
+                               }
+                               filterstate = 1;
+                               break;
+                       }
+               }
+               fputs(buffer, fp);
+               if (pos >= last)
+                       break;
+       }
+
+       if (fflush(fp))
+               advise(ct->c_storage, "error writing to");
+
+       fclose(fp);
+       fclose(ct->c_fp);
+       ct->c_fp = NULL;
+       return OK;
+}
+
+
+/*
+** Add a file to a folder.
+**
+** Return the new message number of the file
+** when added to the folder.  Return -1, if
+** there is an error.
+*/
+
+static int
+output_content_folder(char *folder, char *filename)
+{
+       int msgnum;
+       struct msgs *mp;
+
+       /* Read the folder. */
+       if ((mp = folder_read(folder))) {
+               /* Link file into folder */
+               msgnum = folder_addmsg(&mp, filename, 0, 0, 0, 0, NULL);
+       } else {
+               advise(NULL, "unable to read folder %s", folder);
+               return NOTOK;
+       }
+
+       /* free folder structure */
+       folder_free(mp);
+
+       /*
+       ** Return msgnum.  We are relying on the fact that
+       ** msgnum will be -1, if folder_addmsg() had an error.
+       */
+       return msgnum;
+}
+
+
+/*
+** Parse and expand the storage formatting string
+** pointed to by "cp" into "buffer".
+*/
+
+static int
+parse_format_string(CT ct, char *cp, char *buffer, int buflen, char *dir)
+{
+       int len;
+       char *bp;
+       CI ci = &ct->c_ctinfo;
+
+       /*
+       ** If storage string is "-", just copy it, and
+       ** return (send content to standard output).
+       */
+       if (cp[0] == '-' && cp[1] == '\0') {
+               strncpy(buffer, cp, buflen);
+               return 0;
+       }
+
+       bp = buffer;
+       bp[0] = '\0';
+
+       /*
+       ** If formatting string is a pathname that doesn't
+       ** begin with '/', then preface the path with the
+       ** appropriate directory.
+       */
+       if (*cp != '/' && *cp != '|' && *cp != '!') {
+               snprintf(bp, buflen, "%s/", dir[1] ? dir : "");
+               len = strlen(bp);
+               bp += len;
+               buflen -= len;
+       }
+
+       for (; *cp; cp++) {
+
+               /* We are processing a storage escape */
+               if (*cp == '%') {
+                       switch (*++cp) {
+                       case 'a':
+                               /*
+                               ** Insert parameters from Content-Type.
+                               ** This is only valid for '|' commands.
+                               */
+                               if (buffer[0] != '|' && buffer[0] != '!') {
+                                       *bp++ = *--cp;
+                                       *bp = '\0';
+                                       buflen--;
+                                       continue;
+                               } else {
+                                       char **ap, **ep;
+                                       char *s = "";
+
+                                       for (ap=ci->ci_attrs, ep=ci->ci_values;
+                                                        *ap; ap++, ep++) {
+                                               snprintf(bp, buflen,
+                                                               "%s%s=\"%s\"",
+                                                               s, *ap, *ep);
+                                               len = strlen(bp);
+                                               bp += len;
+                                               buflen -= len;
+                                               s = " ";
+                                       }
+                               }
+                               break;
+
+                       case 'm':
+                               /* insert message number */
+                               snprintf(bp, buflen, "%s",
+                                               mhbasename(ct->c_file));
+                               break;
+
+                       case 'P':
+                               /* insert part number with leading dot */
+                               if (ct->c_partno)
+                                       snprintf(bp, buflen, ".%s",
+                                                       ct->c_partno);
+                               break;
+
+                       case 'p':
+                               /* insert part number withouth leading dot */
+                               if (ct->c_partno)
+                                       strncpy(bp, ct->c_partno, buflen);
+                               break;
+
+                       case 't':
+                               /* insert content type */
+                               strncpy(bp, ci->ci_type, buflen);
+                               break;
+
+                       case 's':
+                               /* insert content subtype */
+                               strncpy(bp, ci->ci_subtype, buflen);
+                               break;
+
+                       case '%':
+                               /* insert the character % */
+                               goto raw;
+
+                       default:
+                               *bp++ = *--cp;
+                               *bp = '\0';
+                               buflen--;
+                               continue;
+                       }
+
+                       /* Advance bp and decrement buflen */
+                       len = strlen(bp);
+                       bp += len;
+                       buflen -= len;
+
+               } else {
+raw:
+                       *bp++ = *cp;
+                       *bp = '\0';
+                       buflen--;
+               }
+       }
+
+       return 0;
+}
+
+
+/*
+** Copy some of the header fields of the initial message/partial
+** message into the header of the reassembled message.
+*/
+
+static int
+copy_some_headers(FILE *out, CT ct)
+{
+       HF hp;
+
+       hp = ct->c_first_hf;  /* start at first header field */
+
+       while (hp) {
+               /*
+               ** A few of the header fields of the enclosing
+               ** messages are not copied.
+               */
+               if (!uprf(hp->name, XXX_FIELD_PRF) &&
+                               mh_strcasecmp(hp->name, VRSN_FIELD) &&
+                               mh_strcasecmp(hp->name, "Subject") &&
+                               mh_strcasecmp(hp->name, "Message-ID"))
+                       fprintf(out, "%s:%s", hp->name, hp->value);
+               hp = hp->next;  /* next header field */
+       }
+
+       return OK;
+}