2 ** whatnow.c -- the WhatNow shell
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
8 ** The inclusion of attachments is eased by
9 ** using the header field name mechanism added to anno and send.
10 ** The header field name for attachments is predefined.
12 ** Several commands have been added at the whatnow prompt:
14 ** cd [ directory ] This option works just like the shell's
15 ** cd command and lets the user change the
16 ** directory from which attachments are
17 ** taken so that long path names are not
18 ** needed with every file.
20 ** ls [ ls-options ] This option works just like the normal
21 ** ls command and exists to allow the user
22 ** to verify file names in the directory.
24 ** pwd This option works just like the normal
25 ** pwd command and exists to allow the user
26 ** to verify the directory.
28 ** attach files This option attaches the named files to
31 ** alist [-ln] This option lists the attachments on the
32 ** draft. -l gets long listings, -n gets
35 ** detach files This option removes attachments from the
36 ** detach -n numbers draft. This can be done by file name or
37 ** by attachment number.
46 static struct swit whatnowswitches[] = {
48 { "editor editor", 0 },
52 { "prompt string", 4 },
61 ** Options at the "whatnow" prompt
63 static struct swit aleqs[] = {
65 { "edit [<editor> <switches>]", 0 },
67 { "refile [<switches>] +folder", 0 },
69 { "display [<switches>]", 0 },
71 { "list [<switches>]", 0 },
73 { "send [<switches>]", 0 },
75 { "push [<switches>]", 0 },
77 { "quit [-delete]", 0 },
81 { "cd [directory]", 0 },
86 #define ATTACHCMDSW 11
88 #define DETACHCMDSW 12
91 { "alist [-ln] ", 2 },
95 static char *myprompt = "\nWhat now? ";
100 static int editfile(char **, char **, char *, int, struct msgs *,
101 char *, char *, int);
102 static int sendfile(char **, char *, int);
103 static int removefile(char *);
104 static void writelscmd(char *, int, char **);
105 static void writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp);
106 static FILE* popen_in_dir(const char *dir, const char *cmd, const char *type);
107 static int system_in_dir(const char *dir, const char *cmd);
111 static int copyf(char *, char *);
116 main(int argc, char **argv)
118 int nedit = 0, use = 0;
120 char *ed = NULL, *drft = NULL, *msgnam = NULL;
121 char buf[BUFSIZ], prompt[BUFSIZ];
122 char **argp, **arguments;
124 char cwd[MAXPATHLEN + 1]; /* current working directory */
125 char file[MAXPATHLEN + 1]; /* file name buffer */
126 char shell[MAXPATHLEN + 1]; /* shell response buffer */
127 FILE *f; /* read pointer for bgnd proc */
128 char *l; /* set on -l to alist command */
129 int n; /* set on -n to alist command */
132 setlocale(LC_ALL, "");
135 invo_name = mhbasename(argv[0]);
137 /* read user profile/context */
140 arguments = getarguments(invo_name, argc, argv, 1);
144 ** Get the initial current working directory.
147 if (getcwd(cwd, sizeof (cwd)) == NULL) {
148 adios("getcwd", "could not get working directory");
151 while ((cp = *argp++)) {
153 switch (smatch(++cp, whatnowswitches)) {
155 ambigsw(cp, whatnowswitches);
158 adios(NULL, "-%s unknown", cp);
161 snprintf(buf, sizeof(buf),
162 "%s [switches] [file]",
164 print_help(buf, whatnowswitches, 1);
167 print_version(invo_name);
171 if (!(ed = *argp++) || *ed == '-')
172 adios(NULL, "missing argument to %s",
181 if (!(myprompt = *argp++) || *myprompt == '-')
182 adios(NULL, "missing argument to %s",
189 adios(NULL, "only one draft at a time!");
194 if ((drft == NULL && (drft = getenv("mhdraft")) == NULL) || *drft == 0)
195 drft = getcpy(m_draft(seq_cur));
197 msgnam = (cp = getenv("mhaltmsg")) && *cp ? getcpy(cp) : NULL;
199 if ((cp = getenv("mhuse")) && *cp)
202 if (ed == NULL && ((ed = getenv("mheditor")) == NULL || *ed == 0)) {
207 /* start editing the draft, unless -noedit was given */
208 if (!nedit && editfile(&ed, NULL, drft, use, NULL, msgnam, NULL, 1)
212 snprintf(prompt, sizeof(prompt), myprompt, invo_name);
214 if (!(argp = getans(prompt, aleqs))) {
218 switch (smatch(*argp, aleqs)) {
221 ** display the message being replied to,
225 showfile(++argp, msgnam);
227 advise(NULL, "no alternate message to display");
231 /* Call an editor on the draft file */
234 if (editfile(&ed, argp, drft, NOUSE, NULL,
235 msgnam, NULL, 1) == NOTOK)
240 /* display the draft file */
241 showfile(++argp, drft);
245 /* Quit, and possibly delete the draft */
246 if (*++argp && (*argp[0] == 'd' ||
247 ((*argp)[0] == '-' && (*argp)[1] == 'd'))) {
250 if (stat(drft, &st) != NOTOK)
251 advise(NULL, "draft left on %s", drft);
256 /* Delete draft and exit */
261 /* Send draft in background */
262 if (sendfile(++argp, drft, 1))
268 sendfile(++argp, drft, 0);
272 /* Refile the draft */
273 if (refile(++argp, drft) == 0)
279 ** Change the working directory for attachments
281 ** Run the directory through the user's shell
282 ** so that we can take advantage of any syntax
283 ** that the user is accustomed to. Read back
284 ** the absolute path.
287 if (*(argp+1) == NULL) {
288 sprintf(buf, "$SHELL -c \"cd;pwd\"");
290 writesomecmd(buf, BUFSIZ, "cd", "pwd", argp);
292 if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
293 fgets(cwd, sizeof (cwd), f);
295 if (strchr(cwd, '\n') != NULL)
296 *strchr(cwd, '\n') = '\0';
300 advise("popen", "could not get directory");
306 /* Print the working directory for attachments */
312 ** List files in the current attachment working
315 ** Use the user's shell so that we can take
316 ** advantage of any syntax that the user is
319 writelscmd(buf, sizeof(buf), argp);
320 system_in_dir(cwd, buf);
325 ** List attachments on current draft. Options are:
327 ** -l long listing (full path names)
328 ** -n numbers listing
334 while (*++argp != NULL) {
335 if (strcmp(*argp, "-l") == 0)
338 else if (strcmp(*argp, "-n") == 0)
341 else if (strcmp(*argp, "-ln") == 0 ||
342 strcmp(*argp, "-nl") == 0) {
352 advise(NULL, "usage is alist [-ln].");
355 annolist(drft, attach_hdr, l, n);
361 ** Attach files to current draft.
364 if (*(argp+1) == NULL) {
365 advise(NULL, "attach command requires file argument(s).");
370 ** Build a command line that causes the user's
371 ** shell to list the file name arguments.
372 ** This handles and wildcard expansion, tilde
375 writelscmd(buf, sizeof(buf), argp);
378 ** Read back the response from the shell,
379 ** which contains a number of lines with one
380 ** file name per line. Remove off the newline.
381 ** Determine whether we have an absolute or
382 ** relative path name. Prepend the current
383 ** working directory to relative path names.
384 ** Add the attachment annotation to the draft.
386 if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
387 while (fgets(shell, sizeof (shell), f)
389 *(strchr(shell, '\n')) = '\0';
392 annotate(drft, attach_hdr,
396 sprintf(file, "%s/%s", cwd,
398 annotate(drft, attach_hdr,
406 advise("popen", "could not get file from shell");
413 ** Detach files from current draft.
415 ** Scan the arguments for a -n. Mixed file
416 ** names and numbers aren't allowed, so this
417 ** catches a -n anywhere in the argument list.
420 for (n = 0, arguments = argp + 1;
423 if (strcmp(*arguments, "-n") == 0) {
430 ** A -n was found so interpret the arguments as
431 ** attachment numbers. Decrement any remaining
432 ** argument number that is greater than the one
433 ** just processed after processing each one so
434 ** that the numbering stays correct.
438 for (arguments = argp + 1;
441 if (strcmp(*arguments, "-n") == 0)
444 if (**arguments != '\0') {
445 n = atoi(*arguments);
446 annotate(drft, attach_hdr,
450 for (argp = arguments + 1; *argp != NULL; argp++) {
451 if (atoi(*argp) > n) {
452 if (atoi(*argp) == 1)
455 sprintf(*argp, "%d", atoi(*argp) - 1);
463 ** The arguments are interpreted as file names.
464 ** Run them through the user's shell for wildcard
465 ** expansion and other goodies. Do this from
466 ** the current working directory if the argument
467 ** is not an absolute path name (does not begin
470 ** We feed all the file names to the shell at
471 ** once, otherwise you can't provide a file name
472 ** with a space in it.
474 writelscmd(buf, sizeof(buf), argp);
475 if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
476 while (fgets(shell, sizeof (shell), f)
478 *(strchr(shell, '\n')) = '\0';
479 annotate(drft, attach_hdr, shell,
484 advise("popen", "could not get file from shell");
490 /* Unknown command */
491 advise(NULL, "say what?");
501 ** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
505 writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
509 ** Note that we do not quote -- the argp from the user
510 ** is assumed to be quoted as they desire. (We can't treat
511 ** it as pure literal as that would prevent them using ~,
512 ** wildcards, etc.) The buffer produced by this function
513 ** should be given to popen_in_dir() or system_in_dir() so
514 ** that the current working directory is set correctly.
516 int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
518 ** NB that some snprintf() return -1 on overflow rather than the
519 ** new C99 mandated 'number of chars that would have been written'
522 ** length checks here and inside the loop allow for the
523 ** trailing ';', trailcmd, '"' and NUL
525 int trailln = strlen(trailcmd) + 3;
526 if (ln < 0 || ln + trailln > bufsz)
527 adios(NULL, "arguments too long");
531 while (*++argp != NULL) {
533 /* +1 for leading space */
534 if (ln + trailln + 1 > bufsz - (cp-buf))
535 adios(NULL, "arguments too long");
537 memcpy(cp, *argp, ln+1);
542 strcpy(cp, trailcmd);
550 ** Build a command line that causes the user's shell to list the file name
551 ** arguments. This handles and wildcard expansion, tilde expansion, etc.
554 writelscmd(char *buf, int bufsz, char **argp)
556 writesomecmd(buf, bufsz, "ls", "", argp);
560 ** Like system(), but run the command in directory dir.
561 ** This assumes the program is single-threaded!
564 system_in_dir(const char *dir, const char *cmd)
568 if (getcwd(olddir, sizeof(olddir)) == 0)
569 adios("getcwd", "could not get working directory");
571 adios("chdir", "could not change working directory");
573 if (chdir(olddir) != 0)
574 adios("chdir", "could not change working directory");
578 /* ditto for popen() */
580 popen_in_dir(const char *dir, const char *cmd, const char *type)
584 if (getcwd(olddir, sizeof(olddir)) == 0)
585 adios("getcwd", "could not get working directory");
587 adios("chdir", "could not change working directory");
588 f = popen(cmd, type);
589 if (chdir(olddir) != 0)
590 adios("chdir", "could not change working directory");
599 static int reedit = 0; /* have we been here before? */
600 static char *edsave = NULL; /* the editor we used previously */
604 editfile(char **ed, char **arg, char *file, int use, struct msgs *mp,
605 char *altmsg, char *cwd, int save_editor)
607 int pid, status, vecp;
608 char altpath[BUFSIZ], linkpath[BUFSIZ];
609 char *cp, *vec[MAXARGS];
614 #endif /* HAVE_LSTAT */
616 /* Was there a previous edit session? */
618 if (!*ed) { /* no explicit editor */
619 *ed = edsave; /* so use the previous one */
620 if ((cp = mhbasename(*ed)) == NULL)
623 /* unless we've specified it via "editor-next" */
624 cp = concat(cp, "-next", NULL);
625 if ((cp = context_find(cp)) != NULL)
629 /* set initial editor */
630 if (*ed == NULL && (*ed = context_find("editor")) == NULL)
635 if (mp == NULL || *altmsg == '/' || cwd == NULL)
636 strncpy(altpath, altmsg, sizeof(altpath));
638 snprintf(altpath, sizeof(altpath), "%s/%s",
639 mp->foldpath, altmsg);
641 strncpy(linkpath, altmsglink, sizeof(linkpath));
643 snprintf(linkpath, sizeof(linkpath), "%s/%s",
650 if (link(altpath, linkpath) == NOTOK) {
651 symlink(altpath, linkpath);
656 #else /* not HAVE_LSTAT */
657 link(altpath, linkpath);
658 #endif /* not HAVE_LSTAT */
661 context_save(); /* save the context file */
664 switch (pid = fork()) {
666 advise("fork", "unable to");
675 m_putenv("mhfolder", mp->foldpath);
676 m_putenv("editalt", altpath);
680 vec[vecp++] = mhbasename(*ed);
683 vec[vecp++] = *arg++;
688 fprintf(stderr, "unable to exec ");
693 if ((status = pidwait(pid, NOTOK))) {
694 if (((status & 0xff00) != 0xff00)
695 && (!reedit || (status & 0x00ff))) {
696 if (!use && (status & 0xff00) && (rename(file, cp = m_backup (file)) != NOTOK)) {
697 advise(NULL, "problems with edit--draft left in %s", cp);
699 advise(NULL, "problems with edit--%s preserved", file);
702 status = -2; /* maybe "reedit ? -2 : -1"? */
708 if (altmsg && mp && !is_readonly(mp) && (slinked ?
709 lstat (linkpath, &st) != NOTOK &&
710 S_ISREG(st.st_mode) &&
711 copyf(linkpath, altpath) == NOTOK :
712 stat(linkpath, &st) != NOTOK &&
714 (unlink(altpath) == NOTOK ||
715 link(linkpath, altpath) == NOTOK)))
716 advise(linkpath, "unable to update %s from", altmsg);
717 #else /* HAVE_LSTAT */
718 if (altmsg && mp && !is_readonly(mp) &&
719 stat(linkpath, &st) != NOTOK &&
721 (unlink(altpath) == NOTOK ||
722 link(linkpath, altpath) == NOTOK))
723 advise(linkpath, "unable to update %s from", altmsg);
724 #endif /* HAVE_LSTAT */
727 /* normally, we remember which editor we used */
729 edsave = getcpy(*ed);
741 copyf(char *ifile, char *ofile)
746 if ((in = open(ifile, O_RDONLY)) == NOTOK)
748 if ((out = open(ofile, O_WRONLY | O_TRUNC)) == NOTOK) {
749 admonish(ofile, "unable to open and truncate");
754 while ((i = read(in, buffer, sizeof(buffer))) > OK)
755 if (write(out, buffer, i) != i) {
756 advise(ofile, "may have damaged");
765 #endif /* HAVE_LSTAT */
773 sendfile(char **arg, char *file, int pushsw)
779 context_save(); /* save the context file */
782 for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
786 advise(NULL, "unable to fork, so sending directly...");
790 vec[vecp++] = invo_name;
792 vec[vecp++] = "-push";
795 vec[vecp++] = *arg++;
799 execvp(sendproc, vec);
800 fprintf(stderr, "unable to exec ");
805 if (pidwait(child_id, OK) == 0)
813 ** Remove the draft file
817 removefile(char *drft)
819 if (unlink(drft) == NOTOK)
820 adios(drft, "unable to unlink");