From f038194718845fe9ca9a596d3ee2e79484a5865a Mon Sep 17 00:00:00 2001 From: Sergey Poznyakoff Date: Fri, 20 Feb 2004 15:34:12 +0000 Subject: [PATCH] (xheader_format_name): Bugfix. (xheader_xhdr_name): Changed the default extended header name to '%d/PaxHeaders.%p/%f', as POSIX requires. (xheader_ghdr_name): Removed unused argument. (xheader_write,xheader_write_global): New function. (xheader_decode): Modified to honor overrides whatever the current archive format is. --- src/xheader.c | 136 +++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 108 insertions(+), 28 deletions(-) diff --git a/src/xheader.c b/src/xheader.c index 7c993a4..129ce84 100644 --- a/src/xheader.c +++ b/src/xheader.c @@ -31,8 +31,23 @@ bool xheader_protected_pattern_p (const char *pattern); bool xheader_protected_keyword_p (const char *keyword); -/* Number of the global headers written so far. Not used yet */ +/* Used by xheader_finish() */ +static void code_string (char const *string, char const *keyword, + struct xheader *xhdr); +static void extended_header_init (); + +/* Number of global headers written so far. */ static size_t global_header_count; +/* FIXME: Possibly it should be reset after changing the volume. + POSIX %n specification says that it is expanded to the sequence + number of current global header in *the* archive. However, for + multi-volume archives this will yield duplicate header names + in different volumes, which I'd like to avoid. The best way + to solve this would be to use per-archive header count as required + by POSIX *and* set globexthdr.name to, say, + $TMPDIR/GlobalHead.%p.$NUMVOLUME.%n. + + However it should wait until buffer.c is finally rewritten */ /* Keyword options */ @@ -173,7 +188,7 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n) char pidbuf[64]; char nbuf[64]; - for (p = exthdr_name; *p && (p = strchr (p, '%')); ) + for (p = fmt; *p && (p = strchr (p, '%')); ) { switch (p[1]) { @@ -182,13 +197,20 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n) break; case 'd': - dirname = safer_name_suffix (dir_name (st->orig_file_name), false); - len += strlen (dirname) - 1; + if (st) + { + dirname = safer_name_suffix (dir_name (st->orig_file_name), + false); + len += strlen (dirname) - 1; + } break; case 'f': - basename = base_name (st->orig_file_name); - len += strlen (basename) - 1; + if (st) + { + basename = base_name (st->orig_file_name); + len += strlen (basename) - 1; + } break; case 'p': @@ -222,12 +244,14 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n) break; case 'd': - q = stpcpy (q, dirname); + if (dirname) + q = stpcpy (q, dirname); p += 2; break; case 'f': - q = stpcpy (q, basename); + if (basename) + q = stpcpy (q, basename); p += 2; break; @@ -264,16 +288,15 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, bool allow_n) char * xheader_xhdr_name (struct tar_stat_info *st) { - /* FIXME: POSIX requires the default name to be '%d/PaxHeaders.%p/%f' */ if (!exthdr_name) - return xstrdup ("././@PaxHeader"); + assign_string (&exthdr_name, "%d/PaxHeaders.%p/%f"); return xheader_format_name (st, exthdr_name, false); } #define GLOBAL_HEADER_TEMPLATE "/GlobalHead.%p.%n" char * -xheader_ghdr_name (struct tar_stat_info *st) +xheader_ghdr_name () { if (!globexthdr_name) { @@ -287,16 +310,65 @@ xheader_ghdr_name (struct tar_stat_info *st) strcat(globexthdr_name, GLOBAL_HEADER_TEMPLATE); } - return xheader_format_name (st, globexthdr_name, true); + return xheader_format_name (NULL, globexthdr_name, true); +} + +void +xheader_write (char type, char *name, struct xheader *xhdr) +{ + union block *header; + size_t size; + char *p; + + size = xhdr->size; + header = start_private_header (name, size); + header->header.typeflag = type; + + simple_finish_header (header); + + p = xhdr->buffer; + + do + { + size_t len; + + header = find_next_block (); + len = BLOCKSIZE; + if (len > size) + len = size; + memcpy (header->buffer, p, len); + if (len < BLOCKSIZE) + memset (header->buffer + len, 0, BLOCKSIZE - len); + p += len; + size -= len; + set_next_block_after (header); + } + while (size > 0); + xheader_destroy (xhdr); +} + +void +xheader_write_global () +{ + char *name; + struct keyword_list *kp; + + if (!keyword_global_override_list) + return; + + extended_header_init (); + for (kp = keyword_global_override_list; kp; kp = kp->next) + code_string (kp->value, kp->pattern, &extended_header); + xheader_finish (&extended_header); + xheader_write (XGLTYPE, name = xheader_ghdr_name (), + &extended_header); + free (name); + global_header_count++; } /* General Interface */ -/* Used by xheader_finish() */ -static void code_string (char const *string, char const *keyword, - struct xheader *xhdr); - struct xhdr_tab { char const *keyword; @@ -419,18 +491,30 @@ run_override_list (struct keyword_list *kp, struct tar_stat_info *st) void xheader_decode (struct tar_stat_info *st) { - char *p = extended_header.buffer + BLOCKSIZE; - char *endp = &extended_header.buffer[extended_header.size-1]; - run_override_list (keyword_global_override_list, st); - while (p < endp) - if (!decode_record (&p, st)) - break; - + if (extended_header.size) + { + char *p = extended_header.buffer + BLOCKSIZE; + char *endp = &extended_header.buffer[extended_header.size-1]; + + while (p < endp) + if (!decode_record (&p, st)) + break; + } run_override_list (keyword_override_list, st); } +static void +extended_header_init () +{ + if (!extended_header.stk) + { + extended_header.stk = xmalloc (sizeof *extended_header.stk); + obstack_init (extended_header.stk); + } +} + void xheader_store (char const *keyword, struct tar_stat_info const *st, void *data) { @@ -445,11 +529,7 @@ xheader_store (char const *keyword, struct tar_stat_info const *st, void *data) if (xheader_keyword_deleted_p (keyword) || xheader_keyword_override_p (keyword)) return; - if (!extended_header.stk) - { - extended_header.stk = xmalloc (sizeof *extended_header.stk); - obstack_init (extended_header.stk); - } + extended_header_init (); t->coder (st, keyword, &extended_header, data); } -- 2.44.0