-
/*
* 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.
+ */
+/* set to preserve access and modification times on annotated message */
+static int preserve_actime_and_modtime = 0;
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:
+ break;
- /* open and lock the file to be annotated */
- if ((fd = lkopen (file, O_RDWR, 0)) == NOTOK) {
- switch (errno) {
- case ENOENT:
- break;
+ default:
+ admonish (file, "unable to lock and open");
+ break;
+ }
+ return 1;
+ }
- default:
- admonish (file, "unable to lock and open");
- break;
+ if (stat(file, &s) == -1) {
+ advise("can't get access and modification times for %s", file);
+ preserve_actime_and_modtime = 0;
}
- return 1;
- }
- i = annosbr (fd, file, comp, text, inplace, datesw);
- lkclose (fd, file);
- return i;
+ 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.
+ */
-static int
-annosbr (int fd, char *file, char *comp, char *text, int inplace, int datesw)
+void
+annolist(char *file, char *comp, char *text, int number)
{
- 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 *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 */
- mode = fstat (fd, &st) != NOTOK ? (st.st_mode & 0777) : m_gmprot ();
+ if ((fp = fopen(file, "r")) == (FILE *)0)
+ adios(file, "unable to open");
- strncpy (tmpfil, m_scratch (file, "annotate"), sizeof(tmpfil));
+ /*
+ * 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);
- if ((tmp = fopen (tmpfil, "w")) == NULL) {
- admonish (tmpfil, "unable to create");
- return 1;
- }
- chmod (tmpfil, mode);
+ /*
+ * Get the length of the field name since we use it often.
+ */
+ length = strlen(comp);
+
+ count = 0;
- 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, cp - sp, cp - sp, sp);
- } while (*cp);
- if (cp[-1] != '\n' && cp != text)
- putc ('\n', tmp);
- }
- fflush (tmp);
- 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);
- cpydata (tmpfd, fd, tmpfil, file);
- close (tmpfd);
- unlink (tmpfil);
- } else {
- strncpy (buffer, m_backup (file), sizeof(buffer));
- if (rename (file, buffer) == NOTOK) {
- switch (errno) {
- case ENOENT: /* unlinked early - no annotations */
- unlink (tmpfil);
- break;
-
- default:
- admonish (buffer, "unable to rename %s to", file);
- break;
- }
- return 1;
+ /*
+ * 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);
}
- if (rename (tmpfil, file) == NOTOK) {
- admonish (file, "unable to rename %s to", tmpfil);
- return 1;
+
+ /*
+ * 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);
+ }
+
+ 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.");
}
- }
- return 0;
+ 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);
+ } else {
+ strncpy (buffer, m_backup (file), sizeof(buffer));
+ if (rename (file, buffer) == NOTOK) {
+ switch (errno) {
+ case ENOENT: /* unlinked early - no annotations */
+ unlink (tmpfil);
+ break;
+
+ default:
+ admonish (buffer, "unable to rename %s to", file);
+ break;
+ }
+ return 1;
+ }
+ if (rename (tmpfil, file) == NOTOK) {
+ admonish (file, "unable to rename %s to", tmpfil);
+ return 1;
+ }
+ }
+
+ /*
+ * 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