* annosbr.c -- prepend annotation to messages
*
* $Id$
+ *
+ * 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.
*/
#include <h/mh.h>
#include <h/tws.h>
+#include <h/utils.h>
#include <fcntl.h>
#include <errno.h>
+#include <utime.h>
-extern int errno;
/*
* static prototypes
*/
-static int annosbr (int, char *, char *, char *, int, int);
+static int annosbr (int, char *, char *, char *, int, int, int, int);
+
+/*
+ * This "local" global and the annopreserve() function are a hack that allows additional
+ * functionality to be added to anno without piling on yet another annotate() argument.
+ */
+static int preserve_actime_and_modtime = 0; /* set to preserve access and modification times on annotated message */
int
-annotate (char *file, char *comp, char *text, int inplace, int datesw)
+annotate (char *file, char *comp, char *text, int inplace, int datesw, int delete, int append)
{
- int i, fd;
+ int i, fd;
+ struct utimbuf b;
+ struct stat s;
/* open and lock the file to be annotated */
if ((fd = lkopen (file, O_RDWR, 0)) == NOTOK) {
switch (errno) {
- case ENOENT:
+ case ENOENT:
break;
- default:
+ default:
admonish (file, "unable to lock and open");
break;
}
return 1;
}
- i = annosbr (fd, file, comp, text, inplace, datesw);
+ if (stat(file, &s) == -1) {
+ advise("can't get access and modification times for %s", file);
+ preserve_actime_and_modtime = 0;
+ }
+
+ b.actime = s.st_atime;
+ b.modtime = s.st_mtime;
+
+ i = annosbr (fd, file, comp, text, inplace, datesw, delete, append);
+
+ if (preserve_actime_and_modtime && utime(file, &b) == -1)
+ advise("can't set access and modification times for %s", file);
+
lkclose (fd, file);
return i;
}
+/*
+ * Produce a listing of all header fields (annotations) whose field name matches
+ * comp. Number the listing if number is set. Treate the field bodies as path
+ * names and just output the last component unless text is non-NULL. We don't
+ * care what text is set to.
+ */
+
+void
+annolist(char *file, char *comp, char *text, int number)
+{
+ int c; /* current character */
+ int count; /* header field (annotation) counter */
+ char *cp; /* miscellaneous character pointer */
+ char *field; /* buffer for header field */
+ int field_size; /* size of field buffer */
+ FILE *fp; /* file pointer made from locked file descriptor */
+ int length; /* length of field name */
+ int n; /* number of bytes written */
+ char *sp; /* another miscellaneous character pointer */
+
+ if ((fp = fopen(file, "r")) == (FILE *)0)
+ adios(file, "unable to open");
+
+ /*
+ * 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);
+
+ /*
+ * Get the length of the field name since we use it often.
+ */
+
+ length = strlen(comp);
+
+ count = 0;
+
+ 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 += 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)
+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;
+ FILE *tmp;
+ int c; /* current character */
+ int count; /* header field (annotation) counter */
+ char *field; /* buffer for header field */
+ int field_size; /* size of field buffer */
+ FILE *fp; /* 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 ();
}
chmod (tmpfil, mode);
- if (datesw)
- fprintf (tmp, "%s: %s\n", comp, dtimenow (0));
- if ((cp = text)) {
+ /*
+ * 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 {
- while (*cp == ' ' || *cp == '\t')
- cp++;
- sp = cp;
- while (*cp && *cp++ != '\n')
- continue;
- if (cp - sp)
- fprintf (tmp, "%s: %*.*s", comp, cp - sp, cp - sp, sp);
- } while (*cp);
- if (cp[-1] != '\n' && cp != text)
- putc ('\n', tmp);
+ /*
+ * 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);
+ }
+
+ else {
+ /*
+ * Find the end of the headers before adding the annotations if we're
+ * appending instead of the default prepending. A special check for
+ * no headers is needed if appending.
+ */
+
+ if (append) {
+ /*
+ * Copy lines from the input file to the temporary file until we
+ * reach the end of the headers.
+ */
+
+ if ((c = getc(fp)) == '\n')
+ rewind(fp);
+
+ else {
+ (void)putc(c, tmp);
+
+ while ((c = getc(fp)) != EOF) {
+ (void)putc(c, tmp);
+
+ if (c == '\n') {
+ (void)ungetc(c = getc(fp), fp);
+
+ if (c == '\n' || c == '-')
+ break;
+ }
+ }
+ }
+ }
+
+ if (datesw)
+ fprintf (tmp, "%s: %s\n", comp, dtimenow (0));
+ if ((cp = text)) {
+ do {
+ while (*cp == ' ' || *cp == '\t')
+ cp++;
+ sp = cp;
+ while (*cp && *cp++ != '\n')
+ continue;
+ if (cp - sp)
+ fprintf (tmp, "%s: %*.*s", comp, (int)(cp - sp), (int)(cp - sp), sp);
+ } while (*cp);
+ if (cp[-1] != '\n' && cp != text)
+ putc ('\n', tmp);
+ }
}
+
fflush (tmp);
+
+ /*
+ * We've been messing with the input file position. Move the input file
+ * descriptor to the current place in the file because the stock data
+ * copying routine uses the descriptor, not the pointer.
+ */
+
+ if (append || delete >= -1) {
+ if (lseek(fd, (off_t)ftell(fp), SEEK_SET) == (off_t)-1)
+ adios(NULL, "can't seek.");
+ }
+
cpydata (fd, fileno (tmp), file, tmpfil);
fclose (tmp);
if (inplace) {
if ((tmpfd = open (tmpfil, O_RDONLY)) == NOTOK)
adios (tmpfil, "unable to open for re-reading");
+
lseek (fd, (off_t) 0, SEEK_SET);
+
+ /*
+ * We're making the file shorter if we're deleting a header field
+ * so the file has to be truncated or it will contain garbage.
+ */
+
+ if (delete >= -1 && ftruncate(fd, 0) == -1)
+ adios(tmpfil, "unable to truncate.");
+
cpydata (tmpfd, fd, tmpfil, file);
close (tmpfd);
unlink (tmpfil);
}
}
+ /*
+ * Close the delete file so that we don't run out of file pointers if
+ * we're doing piles of files. Note that this will make the close() in
+ * lkclose() fail, but that failure is ignored so it's not a problem.
+ */
+
+ if (delete >= -1)
+ (void)fclose(fp);
+
return 0;
}
projects / mmh / blobdiff