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tar: accept spaces at the end of header fields (compat)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -87,11 +87,13 @@ static unsigned long long getOctal(char *str, int len)
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{
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unsigned long long v;
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/* NB: leading spaces are allowed. Using strtoull to handle that.
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* The downside is that we accept e.g. "-123" too :)
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* The downside is that we accept e.g. "-123" too :(
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*/
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str[len] = '\0';
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v = strtoull(str, &str, 8);
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if (*str && (!ENABLE_FEATURE_TAR_OLDGNU_COMPATIBILITY || *str != ' '))
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/* std: "Each numeric field is terminated by one or more
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* <space> or NUL characters". We must support ' '! */
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if (*str != '\0' && *str != ' ')
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bb_error_msg_and_die("corrupted octal value in tar header");
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return v;
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}
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@ -262,20 +264,20 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
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sum_s += ((signed char*)&tar)[i];
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#endif
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}
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#if ENABLE_FEATURE_TAR_OLDGNU_COMPATIBILITY
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sum = strtoul(tar.chksum, &cp, 8);
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if ((*cp && *cp != ' ')
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|| (sum_u != sum IF_FEATURE_TAR_OLDSUN_COMPATIBILITY(&& sum_s != sum))
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) {
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bb_error_msg_and_die("invalid tar header checksum");
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}
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#else
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/* This field does not need special treatment (getOctal) */
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{
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char *endp; /* gcc likes temp var for &endp */
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sum = strtoul(tar.chksum, &endp, 8);
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if ((*endp != '\0' && *endp != ' ')
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|| (sum_u != sum IF_FEATURE_TAR_OLDSUN_COMPATIBILITY(&& sum_s != sum))
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) {
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bb_error_msg_and_die("invalid tar header checksum");
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}
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}
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sum = xstrtoul(tar.chksum, 8);
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if (sum_u != sum IF_FEATURE_TAR_OLDSUN_COMPATIBILITY(&& sum_s != sum)) {
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bb_error_msg_and_die("invalid tar header checksum");
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}
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#endif
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/* 0 is reserved for high perf file, treat as normal file */
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if (!tar.typeflag) tar.typeflag = '0';
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