+ /*
+ * 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, cp = field; (c = getc(fp)) != EOF; *cp++ = c) {
+ if (c == '\n' && (c = getc(fp)) != ' ' && c != '\t') {
+ (void)ungetc(c, fp);
+ c = '\n';
+ break;
+ }
+
+ if (++n >= field_size - 1) {
+ field = (char *) mh_xrealloc((void *)field, field_size += 256);
+
+ cp = field + n - 1;
+ }
+ }
+
+ /*
+ * NUL-terminate the field..
+ */
+
+ *cp = '\0';
+
+ if (strncasecmp(field, comp, length) == 0 && field[length] == ':') {
+ for (cp = field + length + 1; *cp == ' ' || *cp == '\t'; cp++)
+ ;
+
+ if (number)
+ (void)printf("%d\t", ++count);
+
+ if (text == (char *)0 && (sp = strrchr(cp, '/')) != (char *)0)
+ cp = sp + 1;
+
+ (void)printf("%s\n", cp);
+ }
+
+ } while (*field != '\0' && *field != '-');
+
+ /*
+ * Clean up.
+ */
+
+ free(field);
+
+ (void)fclose(fp);
+
+ return;
+}
+
+/*
+ * Set the preserve-times flag. This hack eliminates the need for an
+ * additional argument to annotate().
+ */
+
+void
+annopreserve(int preserve)
+{
+ preserve_actime_and_modtime = preserve;
+ return;
+}
+
+static int
+annosbr (int fd, char *file, char *comp, char *text, int inplace,
+ int datesw, int delete, int append)
+{
+ int mode, tmpfd;
+ char *cp, *sp;
+ char buffer[BUFSIZ], tmpfil[BUFSIZ];
+ struct stat st;
+ FILE *tmp;
+ int c; /* current character */
+ int count; /* header field (annotation) counter */
+ char *field = NULL; /* buffer for header field */
+ int field_size = 0; /* size of field buffer */
+ FILE *fp = NULL; /* file pointer made from locked file descriptor */
+ int length; /* length of field name */
+ int n; /* number of bytes written */
+
+ mode = fstat (fd, &st) != NOTOK ? (st.st_mode & 0777) : m_gmprot ();
+
+ strncpy (tmpfil, m_mktemp2(file, "annotate", NULL, &tmp), sizeof(tmpfil));
+ chmod (tmpfil, mode);
+
+ /*
+ * We're going to need to copy some of the message file to the
+ * temporary file while examining the contents. Convert the
+ * message file descriptor to a file pointer since it's a lot
+ * easier and more efficient to use stdio for this. Also allocate
+ * a buffer to hold the header components as they're read in.
+ * This buffer is grown as needed later.
+ */
+
+ if (delete >= -1 || append != 0) {
+ if ((fp = fdopen(fd, "r")) == (FILE *)0)
+ adios(NULL, "unable to fdopen file.");
+
+ field = (char *)mh_xmalloc(field_size = 256);
+ }
+
+ /*
+ * We're trying to delete a header field (annotation )if the
+ * delete flag is not -2 or less. A value greater than zero
+ * means that we're deleting the nth header field that matches
+ * the field (component) name. A value of zero means that
+ * we're deleting the first field in which both the field name
+ * matches the component name and the field body matches the text.
+ * The text is matched in its entirety if it begins with a slash;
+ * otherwise the text is matched against whatever portion of the
+ * field body follows the last slash. This allows matching of
+ * both absolute and relative path names. This is because this
+ * functionality was added to support attachments. It might be
+ * worth having a separate flag to indicate path name matching
+ * to make it more general. A value of -1 means to delete all
+ * matching fields.
+ */
+
+ if (delete >= -1) {
+ /*
+ * Get the length of the field name since we use it often.
+ */
+
+ length = strlen(comp);
+
+ /*
+ * Initialize the field counter. This is only used if
+ * we're deleting by number.
+ */
+
+ count = 0;
+
+ /*
+ * Copy lines from the input file to the temporary file
+ * until we either find the one that we're looking
+ * for (which we don't copy) or we reach the end of
+ * the headers. Both a blank line and a line beginning
+ * with a - terminate the headers so that we can handle
+ * both drafts and RFC-2822 format messages.
+ */
+
+ do {
+ /*
+ * 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, cp = field; (c = getc(fp)) != EOF; *cp++ = c) {
+ if (c == '\n' && (c = getc(fp)) != ' ' && c != '\t') {
+ (void)ungetc(c, fp);
+ c = '\n';
+ break;
+ }
+
+ if (++n >= field_size - 1) {
+ field = (char *) mh_xrealloc((void *)field, field_size *= 2);
+
+ cp = field + n - 1;
+ }
+ }
+
+ /*
+ * NUL-terminate the field..
+ */
+
+ *cp = '\0';
+
+ /*
+ * Check for a match on the field name. We delete
+ * the line by not copying it to the temporary
+ * file if
+ *
+ * o The delete flag is 0, meaning that we're
+ * going to delete the first matching
+ * field, and the text is NULL meaning that
+ * we don't care about the field body.
+ *
+ * o The delete flag is 0, meaning that we're
+ * going to delete the first matching
+ * field, and the text begins with a / meaning
+ * that we're looking for a full path name,
+ * and the text matches the field body.
+ *
+ * o The delete flag is 0, meaning that we're
+ * going to delete the first matching
+ * field, the text does not begin with a /
+ * meaning that we're looking for the last
+ * path name component, and the last path
+ * name component matches the text.
+ *
+ * o The delete flag is positive meaning that
+ * we're going to delete the nth field
+ * with a matching field name, and this is
+ * the nth matching field name.
+ *
+ * o The delete flag is -1 meaning that we're
+ * going to delete all fields with a
+ * matching field name.
+ */
+
+ if (strncasecmp(field, comp, length) == 0 && field[length] == ':') {
+ if (delete == 0) {
+ if (text == (char *)0)
+ break;
+
+ for (cp = field + length + 1; *cp == ' ' || *cp == '\t'; cp++)
+ ;
+
+ if (*text == '/') {
+ if (strcmp(cp, text) == 0)
+ break;
+ }
+ else {
+ if ((sp = strrchr(cp, '/')) != (char *)0)
+ cp = sp + 1;
+
+ if (strcmp(cp, text) == 0)
+ break;
+ }
+ }
+
+ else if (delete == -1)
+ continue;
+
+ else if (++count == delete)
+ break;
+ }
+
+ /*
+ * This line wasn't a match so copy it to the
+ * temporary file.
+ */
+
+ if ((n = fputs(field, tmp)) == EOF || (c == '\n' && fputc('\n', tmp) == EOF))
+ adios(NULL, "unable to write temporary file.");
+
+ } while (*field != '\0' && *field != '-');
+
+ /*
+ * Get rid of the field buffer because we're done with it.
+ */
+
+ free((void *)field);