-
/*
- * whatnow.c -- the nmh `WhatNow' shell
- *
- * 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.
- */
+** whatnow.c -- the WhatNow shell
+**
+** 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.
+**
+** The inclusion of attachments is eased by
+** using the header field name mechanism added to anno and send.
+** The header field name for attachments is predefined.
+**
+** Several commands have been added at the whatnow prompt:
+**
+** cd [ directory ] This option works just like the shell's
+** cd command and lets the user change the
+** directory from which attachments are
+** taken so that long path names are not
+** needed with every file.
+**
+** ls [ ls-options ] This option works just like the normal
+** ls command and exists to allow the user
+** to verify file names in the directory.
+**
+** pwd This option works just like the normal
+** pwd command and exists to allow the user
+** to verify the directory.
+**
+** attach files This option attaches the named files to
+** the draft.
+**
+** alist [-ln] This option lists the attachments on the
+** draft. -l gets long listings, -n gets
+** numbered listings.
+**
+** detach files This option removes attachments from the
+** detach -n numbers draft. This can be done by file name or
+** by attachment number.
+*/
#include <h/mh.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <h/mime.h>
+#include <h/utils.h>
+
+static struct swit whatnowswitches[] = {
+#define EDITRSW 0
+ { "editor editor", 0 },
+#define NEDITSW 1
+ { "noedit", 0 },
+#define PRMPTSW 2
+ { "prompt string", 4 },
+#define VERSIONSW 3
+ { "version", 0 },
+#define HELPSW 4
+ { "help", 0 },
+ { NULL, 0 }
+};
+
+/*
+** Options at the "whatnow" prompt
+*/
+static struct swit aleqs[] = {
+#define EDITSW 0
+ { "edit [<editor> <switches>]", 0 },
+#define REFILEOPT 1
+ { "refile [<switches>] +folder", 0 },
+#define DISPSW 2
+ { "display", 0 },
+#define LISTSW 3
+ { "list", 0 },
+#define SENDSW 4
+ { "send [<switches>]", 0 },
+#define PUSHSW 5
+ { "push [<switches>]", 0 },
+#define QUITSW 6
+ { "quit", 0 },
+#define DELETESW 7
+ { "delete", 0 },
+#define CDCMDSW 8
+ { "cd [directory]", 0 },
+#define PWDCMDSW 9
+ { "pwd", 0 },
+#define LSCMDSW 10
+ { "ls", 0 },
+#define ATTACHCMDSW 11
+ { "attach", 0 },
+#define DETACHCMDSW 12
+ { "detach [-n]", 2 },
+#define ALISTCMDSW 13
+ { "alist [-ln] ", 2 },
+ { NULL, 0 }
+};
+
+static char *myprompt = "\nWhat now? ";
-/* from whatnowsbr.c */
-int WhatNow (int, char **);
+/*
+** static prototypes
+*/
+static int editfile(char **, char **, char *, int, struct msgs *,
+ char *, char *, int);
+static int sendfile(char **, char *, int);
+static int removefile(char *);
+static void writelscmd(char *, int, char **);
+static void writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp);
+static FILE* popen_in_dir(const char *dir, const char *cmd, const char *type);
+static int system_in_dir(const char *dir, const char *cmd);
+
+
+#ifdef HAVE_LSTAT
+static int copyf(char *, char *);
+#endif
int
-main (int argc, char **argv)
+main(int argc, char **argv)
{
+ int nedit = 0, use = 0;
+ char *cp;
+ char *ed = NULL, *drft = NULL, *msgnam = NULL;
+ char buf[BUFSIZ], prompt[BUFSIZ];
+ char **argp, **arguments;
+ struct stat st;
+ char cwd[MAXPATHLEN + 1]; /* current working directory */
+ char file[MAXPATHLEN + 1]; /* file name buffer */
+ char shell[MAXPATHLEN + 1]; /* shell response buffer */
+ FILE *f; /* read pointer for bgnd proc */
+ char *l; /* set on -l to alist command */
+ int n; /* set on -n to alist command */
+
#ifdef LOCALE
- setlocale(LC_ALL, "");
+ setlocale(LC_ALL, "");
#endif
- return WhatNow (argc, argv);
+
+ invo_name = mhbasename(argv[0]);
+
+ /* read user profile/context */
+ context_read();
+
+ arguments = getarguments(invo_name, argc, argv, 1);
+ argp = arguments;
+
+ /*
+ ** Get the initial current working directory.
+ */
+
+ if (getcwd(cwd, sizeof (cwd)) == NULL) {
+ adios("getcwd", "could not get working directory");
+ }
+
+ while ((cp = *argp++)) {
+ if (*cp == '-') {
+ switch (smatch(++cp, whatnowswitches)) {
+ case AMBIGSW:
+ ambigsw(cp, whatnowswitches);
+ done(1);
+ case UNKWNSW:
+ adios(NULL, "-%s unknown", cp);
+
+ case HELPSW:
+ snprintf(buf, sizeof(buf),
+ "%s [switches] [file]",
+ invo_name);
+ print_help(buf, whatnowswitches, 1);
+ done(1);
+ case VERSIONSW:
+ print_version(invo_name);
+ done(1);
+
+ case EDITRSW:
+ if (!(ed = *argp++) || *ed == '-')
+ adios(NULL, "missing argument to %s",
+ argp[-2]);
+ nedit = 0;
+ continue;
+ case NEDITSW:
+ nedit++;
+ continue;
+
+ case PRMPTSW:
+ if (!(myprompt = *argp++) || *myprompt == '-')
+ adios(NULL, "missing argument to %s",
+ argp[-2]);
+ continue;
+
+ }
+ }
+ if (drft)
+ adios(NULL, "only one draft at a time!");
+ else
+ drft = cp;
+ }
+
+ if ((drft == NULL && (drft = getenv("mhdraft")) == NULL) || *drft == 0)
+ drft = getcpy(m_draft(seq_cur));
+
+ msgnam = (cp = getenv("mhaltmsg")) && *cp ? getcpy(cp) : NULL;
+
+ if ((cp = getenv("mhuse")) && *cp)
+ use = atoi(cp);
+
+ if (ed == NULL && ((ed = getenv("mheditor")) == NULL || *ed == 0)) {
+ ed = NULL;
+ nedit++;
+ }
+
+ /* start editing the draft, unless -noedit was given */
+ if (!nedit && editfile(&ed, NULL, drft, use, NULL, msgnam, NULL, 1)
+ < 0)
+ done(1);
+
+ snprintf(prompt, sizeof(prompt), myprompt, invo_name);
+ for (;;) {
+ if (!(argp = getans(prompt, aleqs))) {
+ unlink(altmsglink);
+ done(1);
+ }
+ switch (smatch(*argp, aleqs)) {
+ case DISPSW:
+ /* display the msg being replied to or distributed */
+ if (msgnam) {
+ snprintf(buf, sizeof buf, "%s '%s'",
+ lproc, msgnam);
+ system(buf);
+ } else {
+ advise(NULL, "no alternate message to display");
+ }
+ break;
+
+ case EDITSW:
+ /* Call an editor on the draft file */
+ if (*++argp)
+ ed = *argp++;
+ if (editfile(&ed, argp, drft, NOUSE, NULL,
+ msgnam, NULL, 1) == NOTOK)
+ done(1);
+ break;
+
+ case LISTSW:
+ /* display the draft file */
+ snprintf(buf, sizeof buf, "%s '%s'", lproc, drft);
+ system(buf);
+ break;
+
+ case QUITSW:
+ /* quit */
+ if (stat(drft, &st) != NOTOK) {
+ advise(NULL, "draft left on %s", drft);
+ }
+ done(1);
+
+ case DELETESW:
+ /* Delete draft and exit */
+ removefile(drft);
+ done(1);
+
+ case PUSHSW:
+ /* Send draft in background */
+ if (sendfile(++argp, drft, 1))
+ done(1);
+ break;
+
+ case SENDSW:
+ /* Send draft */
+ sendfile(++argp, drft, 0);
+ break;
+
+ case REFILEOPT:
+ /* Refile the draft */
+ if (refile(++argp, drft) == 0)
+ done(0);
+ break;
+
+ case CDCMDSW:
+ /*
+ ** Change the working directory for attachments
+ **
+ ** Run the directory through the user's shell
+ ** so that we can take advantage of any syntax
+ ** that the user is accustomed to. Read back
+ ** the absolute path.
+ */
+
+ if (*(argp+1) == NULL) {
+ sprintf(buf, "$SHELL -c \"cd;pwd\"");
+ } else {
+ writesomecmd(buf, BUFSIZ, "cd", "pwd", argp);
+ }
+ if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
+ fgets(cwd, sizeof (cwd), f);
+
+ if (strchr(cwd, '\n') != NULL)
+ *strchr(cwd, '\n') = '\0';
+
+ pclose(f);
+ } else {
+ advise("popen", "could not get directory");
+ }
+
+ break;
+
+ case PWDCMDSW:
+ /* Print the working directory for attachments */
+ printf("%s\n", cwd);
+ break;
+
+ case LSCMDSW:
+ /*
+ ** List files in the current attachment working
+ ** directory
+ **
+ ** Use the user's shell so that we can take
+ ** advantage of any syntax that the user is
+ ** accustomed to.
+ */
+ writelscmd(buf, sizeof(buf), argp);
+ system_in_dir(cwd, buf);
+ break;
+
+ case ALISTCMDSW:
+ /*
+ ** List attachments on current draft. Options are:
+ **
+ ** -l long listing (full path names)
+ ** -n numbers listing
+ */
+
+ l = NULL;
+ n = 0;
+
+ while (*++argp != NULL) {
+ if (strcmp(*argp, "-l") == 0)
+ l = "/";
+
+ else if (strcmp(*argp, "-n") == 0)
+ n = 1;
+
+ else if (strcmp(*argp, "-ln") == 0 ||
+ strcmp(*argp, "-nl") == 0) {
+ l = "/";
+ n = 1;
+ } else {
+ n = -1;
+ break;
+ }
+ }
+
+ if (n == -1)
+ advise(NULL, "usage is alist [-ln].");
+
+ else
+ annolist(drft, attach_hdr, l, n);
+
+ break;
+
+ case ATTACHCMDSW:
+ /*
+ ** Attach files to current draft.
+ */
+
+ if (*(argp+1) == NULL) {
+ advise(NULL, "attach command requires file argument(s).");
+ break;
+ }
+
+ /*
+ ** Build a command line that causes the user's
+ ** shell to list the file name arguments.
+ ** This handles and wildcard expansion, tilde
+ ** expansion, etc.
+ */
+ writelscmd(buf, sizeof(buf), argp);
+
+ /*
+ ** Read back the response from the shell,
+ ** which contains a number of lines with one
+ ** file name per line. Remove off the newline.
+ ** Determine whether we have an absolute or
+ ** relative path name. Prepend the current
+ ** working directory to relative path names.
+ ** Add the attachment annotation to the draft.
+ */
+ if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
+ while (fgets(shell, sizeof (shell), f)
+ != NULL) {
+ *(strchr(shell, '\n')) = '\0';
+
+ if (*shell == '/')
+ annotate(drft, attach_hdr,
+ shell, 0,
+ -2, 1, 0);
+ else {
+ sprintf(file, "%s/%s", cwd,
+ shell);
+ annotate(drft, attach_hdr,
+ file, 0,
+ -2, 1, 0);
+ }
+ }
+
+ pclose(f);
+ } else {
+ advise("popen", "could not get file from shell");
+ }
+
+ break;
+
+ case DETACHCMDSW:
+ /*
+ ** Detach files from current draft.
+ **
+ ** Scan the arguments for a -n. Mixed file
+ ** names and numbers aren't allowed, so this
+ ** catches a -n anywhere in the argument list.
+ */
+
+ for (n = 0, arguments = argp + 1;
+ *arguments != NULL;
+ arguments++) {
+ if (strcmp(*arguments, "-n") == 0) {
+ n = 1;
+ break;
+ }
+ }
+
+ /*
+ ** A -n was found so interpret the arguments as
+ ** attachment numbers. Decrement any remaining
+ ** argument number that is greater than the one
+ ** just processed after processing each one so
+ ** that the numbering stays correct.
+ */
+
+ if (n == 1) {
+ for (arguments = argp + 1;
+ *arguments != NULL;
+ arguments++) {
+ if (strcmp(*arguments, "-n") == 0)
+ continue;
+
+ if (**arguments != '\0') {
+ n = atoi(*arguments);
+ annotate(drft, attach_hdr,
+ NULL, 0,
+ n, 1, 0);
+
+ for (argp = arguments + 1; *argp != NULL; argp++) {
+ if (atoi(*argp) > n) {
+ if (atoi(*argp) == 1)
+ *argp = "";
+ else
+ sprintf(*argp, "%d", atoi(*argp) - 1);
+ }
+ }
+ }
+ }
+ }
+
+ /*
+ ** The arguments are interpreted as file names.
+ ** Run them through the user's shell for wildcard
+ ** expansion and other goodies. Do this from
+ ** the current working directory if the argument
+ ** is not an absolute path name (does not begin
+ ** with a /).
+ **
+ ** We feed all the file names to the shell at
+ ** once, otherwise you can't provide a file name
+ ** with a space in it.
+ */
+ writelscmd(buf, sizeof(buf), argp);
+ if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
+ while (fgets(shell, sizeof (shell), f)
+ != NULL) {
+ *(strchr(shell, '\n')) = '\0';
+ annotate(drft, attach_hdr, shell,
+ 0, 0, 1, 0);
+ }
+ pclose(f);
+ } else {
+ advise("popen", "could not get file from shell");
+ }
+
+ break;
+
+ default:
+ /* Unknown command */
+ advise(NULL, "say what?");
+ break;
+ }
+ }
+ /*NOTREACHED*/
+}
+
+
+
+/*
+** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
+** trailcmd".
+*/
+static void
+writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
+{
+ char *cp;
+ /*
+ ** Note that we do not quote -- the argp from the user
+ ** is assumed to be quoted as they desire. (We can't treat
+ ** it as pure literal as that would prevent them using ~,
+ ** wildcards, etc.) The buffer produced by this function
+ ** should be given to popen_in_dir() or system_in_dir() so
+ ** that the current working directory is set correctly.
+ */
+ int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
+ /*
+ ** NB that some snprintf() return -1 on overflow rather than the
+ ** new C99 mandated 'number of chars that would have been written'
+ */
+ /*
+ ** length checks here and inside the loop allow for the
+ ** trailing ';', trailcmd, '"' and NUL
+ */
+ int trailln = strlen(trailcmd) + 3;
+ if (ln < 0 || ln + trailln > bufsz)
+ adios(NULL, "arguments too long");
+
+ cp = buf + ln;
+
+ while (*++argp != NULL) {
+ ln = strlen(*argp);
+ /* +1 for leading space */
+ if (ln + trailln + 1 > bufsz - (cp-buf))
+ adios(NULL, "arguments too long");
+ *cp++ = ' ';
+ memcpy(cp, *argp, ln+1);
+ cp += ln;
+ }
+ if (*trailcmd) {
+ *cp++ = ';';
+ strcpy(cp, trailcmd);
+ cp += trailln - 3;
+ }
+ *cp++ = '"';
+ *cp = 0;
+}
+
+/*
+** Build a command line that causes the user's shell to list the file name
+** arguments. This handles and wildcard expansion, tilde expansion, etc.
+*/
+static void
+writelscmd(char *buf, int bufsz, char **argp)
+{
+ writesomecmd(buf, bufsz, "ls", "", argp);
+}
+
+/*
+** Like system(), but run the command in directory dir.
+** This assumes the program is single-threaded!
+*/
+static int
+system_in_dir(const char *dir, const char *cmd)
+{
+ char olddir[BUFSIZ];
+ int r;
+ if (getcwd(olddir, sizeof(olddir)) == 0)
+ adios("getcwd", "could not get working directory");
+ if (chdir(dir) != 0)
+ adios("chdir", "could not change working directory");
+ r = system(cmd);
+ if (chdir(olddir) != 0)
+ adios("chdir", "could not change working directory");
+ return r;
+}
+
+/* ditto for popen() */
+static FILE*
+popen_in_dir(const char *dir, const char *cmd, const char *type)
+{
+ char olddir[BUFSIZ];
+ FILE *f;
+ if (getcwd(olddir, sizeof(olddir)) == 0)
+ adios("getcwd", "could not get working directory");
+ if (chdir(dir) != 0)
+ adios("chdir", "could not change working directory");
+ f = popen(cmd, type);
+ if (chdir(olddir) != 0)
+ adios("chdir", "could not change working directory");
+ return f;
+}
+
+
+/*
+** EDIT
+*/
+
+static int reedit = 0; /* have we been here before? */
+static char *edsave = NULL; /* the editor we used previously */
+
+
+static int
+editfile(char **ed, char **arg, char *file, int use, struct msgs *mp,
+ char *altmsg, char *cwd, int save_editor)
+{
+ int pid, status, vecp;
+ char altpath[BUFSIZ], linkpath[BUFSIZ];
+ char *cp, *vec[MAXARGS];
+ struct stat st;
+
+#ifdef HAVE_LSTAT
+ int slinked = 0;
+#endif /* HAVE_LSTAT */
+
+ /* Was there a previous edit session? */
+ if (reedit) {
+ if (!*ed) { /* no explicit editor */
+ *ed = edsave; /* so use the previous one */
+ if ((cp = mhbasename(*ed)) == NULL)
+ cp = *ed;
+
+ /* unless we've specified it via "editor-next" */
+ cp = concat(cp, "-next", NULL);
+ if ((cp = context_find(cp)) != NULL)
+ *ed = cp;
+ }
+ } else if (!*ed) {
+ /* set initial editor */
+ *ed = defaulteditor;
+ }
+
+ if (altmsg) {
+ if (mp == NULL || *altmsg == '/' || cwd == NULL)
+ strncpy(altpath, altmsg, sizeof(altpath));
+ else
+ snprintf(altpath, sizeof(altpath), "%s/%s",
+ mp->foldpath, altmsg);
+ if (cwd == NULL)
+ strncpy(linkpath, altmsglink, sizeof(linkpath));
+ else
+ snprintf(linkpath, sizeof(linkpath), "%s/%s",
+ cwd, altmsglink);
+ }
+
+ if (altmsg) {
+ unlink(linkpath);
+#ifdef HAVE_LSTAT
+ if (link(altpath, linkpath) == NOTOK) {
+ symlink(altpath, linkpath);
+ slinked = 1;
+ } else {
+ slinked = 0;
+ }
+#else /* not HAVE_LSTAT */
+ link(altpath, linkpath);
+#endif /* not HAVE_LSTAT */
+ }
+
+ context_save(); /* save the context file */
+ fflush(stdout);
+
+ switch (pid = fork()) {
+ case NOTOK:
+ advise("fork", "unable to");
+ status = NOTOK;
+ break;
+
+ case OK:
+ if (cwd)
+ chdir(cwd);
+ if (altmsg) {
+ if (mp)
+ m_putenv("mhfolder", mp->foldpath);
+ m_putenv("editalt", altpath);
+ }
+
+ vecp = 0;
+ vec[vecp++] = mhbasename(*ed);
+ if (arg)
+ while (*arg)
+ vec[vecp++] = *arg++;
+ vec[vecp++] = file;
+ vec[vecp] = NULL;
+
+ execvp(*ed, vec);
+ fprintf(stderr, "unable to exec ");
+ perror(*ed);
+ _exit(-1);
+
+ default:
+ if ((status = pidwait(pid, NOTOK))) {
+ if (((status & 0xff00) != 0xff00)
+ && (!reedit || (status & 0x00ff))) {
+ if (!use && (status & 0xff00) && (rename(file, cp = m_backup (file)) != NOTOK)) {
+ advise(NULL, "problems with edit--draft left in %s", cp);
+ } else {
+ advise(NULL, "problems with edit--%s preserved", file);
+ }
+ }
+ status = -2; /* maybe "reedit ? -2 : -1"? */
+ break;
+ }
+
+ reedit++;
+#ifdef HAVE_LSTAT
+ if (altmsg && mp && !is_readonly(mp) && (slinked ?
+ lstat (linkpath, &st) != NOTOK &&
+ S_ISREG(st.st_mode) &&
+ copyf(linkpath, altpath) == NOTOK :
+ stat(linkpath, &st) != NOTOK &&
+ st.st_nlink == 1 &&
+ (unlink(altpath) == NOTOK ||
+ link(linkpath, altpath) == NOTOK)))
+ advise(linkpath, "unable to update %s from", altmsg);
+#else /* HAVE_LSTAT */
+ if (altmsg && mp && !is_readonly(mp) &&
+ stat(linkpath, &st) != NOTOK &&
+ st.st_nlink == 1 &&
+ (unlink(altpath) == NOTOK ||
+ link(linkpath, altpath) == NOTOK))
+ advise(linkpath, "unable to update %s from", altmsg);
+#endif /* HAVE_LSTAT */
+ }
+
+ /* normally, we remember which editor we used */
+ if (save_editor)
+ edsave = getcpy(*ed);
+
+ *ed = NULL;
+ if (altmsg)
+ unlink(linkpath);
+
+ return status;
+}
+
+
+#ifdef HAVE_LSTAT
+static int
+copyf(char *ifile, char *ofile)
+{
+ int i, in, out;
+ char buffer[BUFSIZ];
+
+ if ((in = open(ifile, O_RDONLY)) == NOTOK)
+ return NOTOK;
+ if ((out = open(ofile, O_WRONLY | O_TRUNC)) == NOTOK) {
+ admonish(ofile, "unable to open and truncate");
+ close(in);
+ return NOTOK;
+ }
+
+ while ((i = read(in, buffer, sizeof(buffer))) > OK)
+ if (write(out, buffer, i) != i) {
+ advise(ofile, "may have damaged");
+ i = NOTOK;
+ break;
+ }
+
+ close(in);
+ close(out);
+ return i;
+}
+#endif /* HAVE_LSTAT */
+
+
+/*
+** SEND
+*/
+
+static int
+sendfile(char **arg, char *file, int pushsw)
+{
+ pid_t child_id;
+ int vecp;
+ char *vec[MAXARGS];
+
+ context_save(); /* save the context file */
+ fflush(stdout);
+
+ switch (child_id = fork()) {
+ case NOTOK:
+ advise(NULL, "unable to fork, so sending directly...");
+ /* fall */
+ case OK:
+ vecp = 0;
+ vec[vecp++] = invo_name;
+ if (pushsw)
+ vec[vecp++] = "-push";
+ if (arg)
+ while (*arg)
+ vec[vecp++] = *arg++;
+ vec[vecp++] = file;
+ vec[vecp] = NULL;
+
+ execvp(sendproc, vec);
+ fprintf(stderr, "unable to exec ");
+ perror(sendproc);
+ _exit(-1);
+
+ default:
+ if (pidwait(child_id, OK) == 0)
+ done(0);
+ return 1;
+ }
+}
+
+
+/*
+** Remove the draft file
+*/
+
+static int
+removefile(char *drft)
+{
+ if (unlink(drft) == NOTOK)
+ adios(drft, "unable to unlink");
+
+ return OK;
}
projects / mmh / blobdiff