/* * annosbr.c -- prepend annotation to messages * * 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 #include #include #include #include /* * static prototypes */ 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, int delete, int append) { int i, fd; struct utimbuf b; struct stat s; int failed_to_lock = 0; /* open and lock the file to be annotated */ if ((fd = lkopendata (file, O_RDWR, 0, &failed_to_lock)) == NOTOK) { switch (errno) { case ENOENT: break; default: if (failed_to_lock) { admonish (file, "unable to lock"); } else { admonish (file, "unable to open"); } break; } return 1; } 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); lkclosedata (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")) == NULL) 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); 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 == NULL && (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 ? (int) (st.st_mode & 0777) : m_gmprot (); if ((cp = m_mktemp2(file, "annotate", NULL, &tmp)) == NULL) { adios(NULL, "unable to create temporary file in %s", get_temp_dir()); } strncpy (tmpfil, cp, 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")) == NULL) 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 == NULL) break; for (cp = field + length + 1; *cp == ' ' || *cp == '\t'; cp++) ; if (*text == '/') { if (strcmp(cp, text) == 0) break; } else { if ((sp = strrchr(cp, '/')) != NULL) 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 (fp && 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); (void) m_unlink (tmpfil); } else { strncpy (buffer, m_backup (file), sizeof(buffer)); if (rename (file, buffer) == NOTOK) { switch (errno) { case ENOENT: /* unlinked early - no annotations */ (void) m_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 (fp) (void)fclose(fp); return 0; }