#include <h/utils.h>
#include <h/tws.h>
-static int get_line(void);
-static int make_mime_composition_file_entry(char *, int, char *);
-
-static int field_size; /* size of header field buffer */
-static char *field; /* header field buffer */
-static FILE *draft_file; /* draft file pointer */
-static FILE *composition_file; /* composition file pointer */
-
-int
-attach(char *attachment_header_field_name, char *draft_file_name,
- char *body_file_name, size_t body_file_name_len,
- char *composition_file_name, size_t composition_file_name_len,
- int attachformat)
-{
- char buf[PATH_MAX + 6]; /* miscellaneous buffer */
- int c; /* current character for body copy */
- int has_attachment; /* draft has at least one attachment */
- int has_body; /* draft has a message body */
- int length; /* length of attachment header field name */
- char *p; /* miscellaneous string pointer */
- FILE *fp; /* pointer for mhn.defaults */
- FILE *body_file = NULL; /* body file pointer */
-
- /*
- * Open up the draft file.
- */
-
- if ((draft_file = fopen(draft_file_name, "r")) == (FILE *)0)
- adios((char *)0, "can't open draft file `%s'.", draft_file_name);
-
- /*
- * Allocate a buffer to hold the header components as they're read in.
- * This buffer might need to be quite large, so we grow it as needed.
- */
-
- field = (char *)mh_xmalloc(field_size = 256);
-
- /*
- * Scan the draft file for a header field name, with a non-empty
- * body, that matches the -attach argument. The existence of one
- * indicates that the draft has attachments. Bail out if there
- * are no attachments because we're done. Read to the end of the
- * headers even if we have no attachments.
- */
-
- length = strlen(attachment_header_field_name);
-
- has_attachment = 0;
-
- while (get_line() != EOF && *field != '\0' && *field != '-') {
- if (strncasecmp(field, attachment_header_field_name, length) == 0 &&
- field[length] == ':') {
- for (p = field + length + 1; *p == ' ' || *p == '\t'; p++)
- ;
- if (strlen (p) > 0) {
- has_attachment = 1;
- }
- }
- }
-
- if (has_attachment == 0)
- return (DONE);
-
- /*
- * We have at least one attachment. Look for at least one non-blank line
- * in the body of the message which indicates content in the body.
- */
-
- has_body = 0;
-
- while (get_line() != EOF) {
- for (p = field; *p != '\0'; p++) {
- if (*p != ' ' && *p != '\t') {
- has_body = 1;
- break;
- }
- }
-
- if (has_body)
- break;
- }
-
- /*
- * Make names for the temporary files.
- */
-
- (void)strncpy(body_file_name,
- m_mktemp(m_maildir(invo_name), NULL, NULL),
- body_file_name_len);
- (void)strncpy(composition_file_name,
- m_mktemp(m_maildir(invo_name), NULL, NULL),
- composition_file_name_len);
-
- if (has_body)
- body_file = fopen(body_file_name, "w");
-
- composition_file = fopen(composition_file_name, "w");
-
- if ((has_body && body_file == (FILE *)0) || composition_file == (FILE *)0) {
- clean_up_temporary_files(body_file_name, composition_file_name);
- adios((char *)0, "unable to open all of the temporary files.");
- }
-
- /*
- * Start at the beginning of the draft file. Copy all
- * non-attachment header fields to the temporary composition
- * file. Then add the dashed line separator.
- */
-
- rewind(draft_file);
-
- while (get_line() != EOF && *field != '\0' && *field != '-')
- if (strncasecmp(field, attachment_header_field_name, length) != 0 ||
- field[length] != ':')
- (void)fprintf(composition_file, "%s\n", field);
-
- (void)fputs("--------\n", composition_file);
-
- /*
- * Copy the message body to a temporary file.
- */
-
- if (has_body) {
- while ((c = getc(draft_file)) != EOF)
- putc(c, body_file);
-
- (void)fclose(body_file);
- }
-
- /*
- * Add a mhbuild MIME composition file line for the body if there was one.
- * Set the default content type to text/plain so that mhbuild takes care
- * of any necessary encoding.
- */
-
- if (has_body)
- if (make_mime_composition_file_entry(body_file_name, attachformat,
- "text/plain")) {
- clean_up_temporary_files(body_file_name, composition_file_name);
- adios (NULL, "exiting");
- }
-
- /*
- * Now, go back to the beginning of the draft file and look for
- * header fields that specify attachments. Add a mhbuild MIME
- * composition file for each.
- */
-
- if ((fp = fopen (p = etcpath ("mhn.defaults"), "r"))) {
- readconfig ((struct node **) NULL, fp, p, 0);
- fclose(fp);
- }
-
- rewind(draft_file);
-
- while (get_line() != EOF && *field != '\0' && *field != '-') {
- if (strncasecmp(field, attachment_header_field_name, length) == 0 &&
- field[length] == ':') {
- for (p = field + length + 1; *p == ' ' || *p == '\t'; p++)
- ;
-
- /* Skip empty attachment_header_field_name lines. */
- if (strlen (p) > 0) {
- struct stat st;
- if (stat (p, &st) == OK) {
- if (S_ISREG (st.st_mode)) {
- /* Don't set the default content type so take
- make_mime_composition_file_entry() will try
- to infer it from the file type. */
- if (make_mime_composition_file_entry(p, attachformat, 0)) {
- clean_up_temporary_files(body_file_name,
- composition_file_name);
- adios (NULL, "exiting");
- }
- } else {
- adios (NULL, "unable to attach %s, not a plain file",
- p);
- }
- } else {
- adios (NULL, "unable to access file \"%s\"", p);
- }
- }
- }
- }
-
- (void)fclose(composition_file);
-
- /*
- * We're ready to roll! Run mhbuild on the composition file.
- * Note that mhbuild is in the context as buildmimeproc.
- */
-
- (void)sprintf(buf, "%s %s", buildmimeproc, composition_file_name);
-
- if (system(buf) != 0) {
- clean_up_temporary_files(body_file_name, composition_file_name);
- return NOTOK;
- }
-
- return OK;
-}
-
-void
-clean_up_temporary_files(const char *body_file_name,
- const char *composition_file_name)
-{
- (void)unlink(body_file_name);
- (void)unlink(composition_file_name);
-
- return;
-}
-
-static int
-get_line(void)
-{
- int c; /* current character */
- int n; /* number of bytes in buffer */
- char *p; /* buffer pointer */
-
- /*
- * Get a line from the input file, growing the field buffer as needed. We do this
- * so that we can fit an entire line in the buffer making it easy to do a string
- * comparison on both the field name and the field body which might be a long path
- * name.
- */
-
- for (n = 0, p = field; (c = getc(draft_file)) != EOF; *p++ = c) {
- if (c == '\n' && (c = getc(draft_file)) != ' ' && c != '\t') {
- (void)ungetc(c, draft_file);
- c = '\n';
- break;
- }
-
- if (++n >= field_size - 1) {
- field = (char *)mh_xrealloc((void *)field, field_size += 256);
-
- p = field + n - 1;
- }
- }
-
- /*
- * NUL-terminate the field..
- */
+#ifdef MIMETYPEPROC
+static char *get_file_info(const char *, const char *);
+#endif /* MIMETYPEPROC */
- *p = '\0';
+/*
+ * Try to use external command to determine mime type, and possibly
+ * encoding. Caller is responsible for free'ing returned memory.
+ */
+char *
+mime_type(const char *file_name) {
+ char *content_type = NULL; /* mime content type */
- return (c);
-}
+#ifdef MIMETYPEPROC
+ char *mimetype;
-static int
-make_mime_composition_file_entry(char *file_name, int attachformat,
- char *default_content_type)
-{
- int binary; /* binary character found flag */
- int c; /* current character */
- char cmd[PATH_MAX + 8]; /* file command buffer */
- char *content_type; /* mime content type */
- FILE *fp; /* content and pipe file pointer */
- struct node *np; /* context scan node pointer */
- char *p; /* miscellaneous string pointer */
- struct stat st; /* file status buffer */
+ if ((mimetype = get_file_info(MIMETYPEPROC, file_name))) {
+#ifdef MIMEENCODINGPROC
+ /* Try to append charset for text content. */
+ char *mimeencoding;
- if ((content_type = mime_type (file_name)) == NULL) {
- /*
- * Check the file name for a suffix. Scan the context for
- * that suffix on a mhshow-suffix- entry. We use these
- * entries to be compatible with mhnshow, and there's no
- * reason to make the user specify each suffix twice. Context
- * entries of the form "mhshow-suffix-contenttype" in the name
- * have the suffix in the field, including the dot.
- */
- if ((p = strrchr(file_name, '.')) != (char *)0) {
- for (np = m_defs; np; np = np->n_next) {
- if (strncasecmp(np->n_name, "mhshow-suffix-", 14) == 0 &&
- strcasecmp(p, np->n_field ? np->n_field : "") == 0) {
- content_type = strdup (np->n_name + 14);
- break;
- }
+ if (strncasecmp(mimetype, "text", 4) == 0) {
+ if ((mimeencoding = get_file_info(MIMEENCODINGPROC, file_name))) {
+ content_type = concat(mimetype, "; charset=", mimeencoding,
+ NULL);
+ } else {
+ content_type = strdup(mimetype);
}
+ } else {
+ content_type = strdup(mimetype);
}
-
- if (content_type == NULL && default_content_type != NULL) {
- content_type = strdup (default_content_type);
- }
- }
-
- /*
- * No content type was found, either because there was no matching entry in the
- * context or because the file name has no suffix. Open the file and check for
- * non-ASCII characters. Choose the content type based on this check.
- */
-
- if (content_type == (char *)0) {
- if ((fp = fopen(file_name, "r")) == (FILE *)0) {
- advise((char *)0, "unable to access file \"%s\"", file_name);
- return NOTOK;
- }
-
- binary = 0;
-
- while ((c = getc(fp)) != EOF) {
- if (c > 127 || c < 0) {
- binary = 1;
- break;
- }
- }
-
- (void)fclose(fp);
-
- content_type =
- strdup (binary ? "application/octet-stream" : "text/plain");
- }
-
- /*
- * Make sure that the attachment file exists and is readable. Append a mhbuild
- * directive to the draft file. This starts with the content type. Append a
- * file name attribute and a private x-unix-mode attribute. Also append a
- * description obtained (if possible) by running the "file" command on the file.
- */
-
- if (stat(file_name, &st) == -1 || access(file_name, R_OK) != 0) {
- advise((char *)0, "unable to access file \"%s\"", file_name);
- return NOTOK;
+#else /* MIMEENCODINGPROC */
+ content_type = strdup(mimetype);
+#endif /* MIMEENCODINGPROC */
}
+#else /* MIMETYPEPROC */
+ NMH_UNUSED(file_name);
+#endif /* MIMETYPEPROC */
- switch (attachformat) {
- case 0:
- /* Insert name, file mode, and Content-Id. */
- (void)fprintf(composition_file, "#%s; name=\"%s\"; x-unix-mode=0%.3ho",
- content_type, ((p = strrchr(file_name, '/')) == (char *)0) ? file_name : p + 1, (unsigned short)(st.st_mode & 0777));
-
- if (strlen(file_name) > PATH_MAX) {
- advise((char *)0, "attachment file name `%s' too long.", file_name);
- return NOTOK;
- }
-
- (void)sprintf(cmd, "file '%s'", file_name);
-
- if ((fp = popen(cmd, "r")) != (FILE *)0 && fgets(cmd, sizeof (cmd), fp) != (char *)0) {
- *strchr(cmd, '\n') = '\0';
-
- /*
- * The output of the "file" command is of the form
- *
- * file: description
- *
- * Strip off the "file:" and subsequent white space.
- */
-
- for (p = cmd; *p != '\0'; p++) {
- if (*p == ':') {
- for (p++; *p != '\0'; p++) {
- if (*p != '\t')
- break;
- }
- break;
- }
- }
-
- if (*p != '\0')
- /* Insert Content-Description. */
- (void)fprintf(composition_file, " [ %s ]", p);
-
- (void)pclose(fp);
- }
+ return content_type;
+}
- break;
- case 1:
- if (stringdex (m_maildir(invo_name), file_name) == 0) {
- /* Content had been placed by send into a temp file.
- Don't generate Content-Disposition header, because
- it confuses Microsoft Outlook, Build 10.0.6626, at
- least. */
- (void) fprintf (composition_file, "#%s <>", content_type);
- } else {
- /* Suppress Content-Id, insert simple Content-Disposition
- and Content-Description with filename.
- The Content-Disposition type needs to be "inline" for
- MS Outlook and BlackBerry calendar programs to properly
- handle a text/calendar attachment. */
- p = strrchr(file_name, '/');
- (void) fprintf (composition_file,
- "#%s; name=\"%s\" <> [%s]{%s}",
- content_type,
- (p == (char *)0) ? file_name : p + 1,
- (p == (char *)0) ? file_name : p + 1,
- strcmp ("text/calendar", content_type)
- ? "attachment" : "inline");
- }
- break;
- case 2:
- if (stringdex (m_maildir(invo_name), file_name) == 0) {
- /* Content had been placed by send into a temp file.
- Don't generate Content-Disposition header, because
- it confuses Microsoft Outlook, Build 10.0.6626, at
- least. */
- (void) fprintf (composition_file, "#%s <>", content_type);
+#ifdef MIMETYPEPROC
+/*
+ * Get information using proc about a file.
+ */
+static char *
+get_file_info(const char *proc, const char *file_name) {
+ char *cmd, *cp;
+ char *quotec = "'";
+
+ if ((cp = strchr(file_name, '\''))) {
+ /* file_name contains a single quote. */
+ if (strchr(file_name, '"')) {
+ advise(NULL, "filenames containing both single and double quotes "
+ "are unsupported for attachment");
+ return NULL;
} else {
- /* Suppress Content-Id, insert Content-Disposition with
- modification date and Content-Description wtih filename.
- The Content-Disposition type needs to be "inline" for
- MS Outlook and BlackBerry calendar programs to properly
- handle a text/calendar attachment. */
- p = strrchr(file_name, '/');
- (void) fprintf (composition_file,
- "#%s; name=\"%s\" <>[%s]{%s; "
- "modification-date=\"%s\"}",
- content_type,
- (p == (char *)0) ? file_name : p + 1,
- (p == (char *)0) ? file_name : p + 1,
- strcmp ("text/calendar", content_type)
- ? "attachment" : "inline",
- dtime (&st.st_mtime, 0));
+ quotec = "\"";
}
-
- break;
- default:
- adios ((char *)0, "unsupported attachformat %d", attachformat);
}
- free (content_type);
+ cmd = concat(proc, " ", quotec, file_name, quotec, NULL);
+ if ((cmd = concat(proc, " ", quotec, file_name, quotec, NULL))) {
+ FILE *fp;
- /*
- * Finish up with the file name.
- */
+ if ((fp = popen(cmd, "r")) != NULL) {
+ char buf[BUFSIZ >= 2048 ? BUFSIZ : 2048];
- (void)fprintf(composition_file, " %s\n", file_name);
-
- return OK;
-}
-
-/*
- * Try to use external command to determine mime type, and possibly
- * encoding. Caller is responsible for free'ing returned memory.
- */
-char *
-mime_type (const char *file_name) {
- char *content_type = NULL; /* mime content type */
-
-#ifdef MIMETYPEPROC
- char cmd[2 * PATH_MAX + 2]; /* file command buffer */
- char buf[BUFSIZ >= 2048 ? BUFSIZ : 2048];
- FILE *fp; /* content and pipe file pointer */
- char mimetypeproc[] = MIMETYPEPROC " '%s'";
-
- if ((int) snprintf (cmd, sizeof cmd, mimetypeproc, file_name) <
- (int) sizeof cmd) {
- if ((fp = popen (cmd, "r")) != NULL) {
- /* Make sure that buf has space for one additional
- character, the semicolon that might be added below. */
- if (fgets (buf, sizeof buf - 1, fp)) {
- char *cp, *space;
+ buf[0] = '\0';
+ if (fgets(buf, sizeof buf, fp)) {
+ char *eol;
/* Skip leading <filename>:<whitespace>, if present. */
- if ((content_type = strchr (buf, ':')) != NULL) {
- ++content_type;
- while (*content_type && isblank (*content_type)) {
- ++content_type;
+ if ((cp = strchr(buf, ':')) != NULL) {
+ ++cp;
+ while (*cp && isblank((unsigned char) *cp)) {
+ ++cp;
}
} else {
- content_type = buf;
+ cp = buf;
}
/* Truncate at newline (LF or CR), if present. */
- if ((cp = strpbrk (content_type, "\n\n")) != NULL) {
- *cp = '\0';
+ if ((eol = strpbrk(cp, "\n\r")) != NULL) {
+ *eol = '\0';
}
-
- /* If necessary, insert semicolon between content type
- and charset. Assume that the first space is between
- them. */
- if ((space = strchr (content_type, ' ')) != NULL) {
- ssize_t len = strlen (content_type);
-
- if (space - content_type > 0 &&
- len > space - content_type + 1) {
- if (*(space - 1) != ';') {
- /* The +1 is for the terminating NULL. */
- memmove (space + 1, space,
- len - (space - content_type) + 1);
- *space = ';';
- }
- }
- }
- } else {
- advise (NULL, "unable to read mime type");
+ } else if (buf[0] == '\0') {
+ /* This can happen on Cygwin if the popen()
+ mysteriously fails. Return NULL so that the caller
+ will use another method to determine the info. */
+ free (cp);
+ cp = NULL;
}
+
+ (void) pclose(fp);
} else {
- advise (NULL, "unable to run %s", buf);
+ advise(NULL, "no output from %s", cmd);
}
+
+ free(cmd);
} else {
- advise (NULL, "filename to large to deduce mime type");
+ advise(NULL, "concat with \"%s\" failed, out of memory?", proc);
}
-#else
- NMH_UNUSED (file_name);
-#endif
- return content_type ? strdup (content_type) : NULL;
+ return cp ? strdup(cp) : NULL;
}
+#endif /* MIMETYPEPROC */
projects / nmh / blobdiff