From e0b4df993efc42e012f36a27d976190d51b5d16e Mon Sep 17 00:00:00 2001 From: Lucas Holt Date: Fri, 27 Sep 2024 10:10:33 -0400 Subject: [PATCH] print/cups: add fix for CVE issue (from their git) --- print/cups/files/patch-ppd-cache | 483 +++++++++++++++++++++++++++++++ 1 file changed, 483 insertions(+) create mode 100644 print/cups/files/patch-ppd-cache diff --git a/print/cups/files/patch-ppd-cache b/print/cups/files/patch-ppd-cache new file mode 100644 index 0000000000..221443766e --- /dev/null +++ b/print/cups/files/patch-ppd-cache @@ -0,0 +1,483 @@ +diff --git cups/ppd-cache.c.orig cups/ppd-cache.c +index e750fccd4..a6163a0e1 100644 +--- cups/ppd-cache.c.orig ++++ cups/ppd-cache.c +@@ -32,6 +32,7 @@ + static int cups_connect(http_t **http, const char *url, char *resource, size_t ressize); + static int cups_get_url(http_t **http, const char *url, char *name, size_t namesize); + static const char *ppd_inputslot_for_keyword(_ppd_cache_t *pc, const char *keyword); ++static void ppd_put_string(cups_file_t *fp, cups_lang_t *lang, cups_array_t *strings, const char *ppd_option, const char *ppd_choice, const char *pwg_msgid); + static void pwg_add_finishing(cups_array_t *finishings, ipp_finishings_t template, const char *name, const char *value); + static void pwg_add_message(cups_array_t *a, const char *msg, const char *str); + static int pwg_compare_finishings(_pwg_finishings_t *a, _pwg_finishings_t *b); +@@ -3197,9 +3197,10 @@ _ppdCreateFromIPP2( + ipp_t *media_col, /* Media collection */ + *media_size; /* Media size collection */ + char make[256], /* Make and model */ +- *model, /* Model name */ ++ *mptr, /* Pointer into make and model */ + ppdname[PPD_MAX_NAME]; + /* PPD keyword */ ++ const char *model; /* Model name */ + int i, j, /* Looping vars */ + count, /* Number of values */ + bottom, /* Largest bottom margin */ +@@ -3221,8 +3222,7 @@ _ppdCreateFromIPP2( + int have_qdraft = 0,/* Have draft quality? */ + have_qhigh = 0; /* Have high quality? */ + char msgid[256]; /* Message identifier (attr.value) */ +- const char *keyword, /* Keyword value */ +- *msgstr; /* Localized string */ ++ const char *keyword; /* Keyword value */ + cups_array_t *strings = NULL;/* Printer strings file */ + struct lconv *loc = localeconv(); + /* Locale data */ +@@ -3260,34 +3260,104 @@ _ppdCreateFromIPP2( + } + + /* +- * Standard stuff for PPD file... ++ * Get a sanitized make and model... + */ + +- cupsFilePuts(fp, "*PPD-Adobe: \"4.3\"\n"); +- cupsFilePuts(fp, "*FormatVersion: \"4.3\"\n"); +- cupsFilePrintf(fp, "*FileVersion: \"%d.%d\"\n", CUPS_VERSION_MAJOR, CUPS_VERSION_MINOR); +- cupsFilePuts(fp, "*LanguageVersion: English\n"); +- cupsFilePuts(fp, "*LanguageEncoding: ISOLatin1\n"); +- cupsFilePuts(fp, "*PSVersion: \"(3010.000) 0\"\n"); +- cupsFilePuts(fp, "*LanguageLevel: \"3\"\n"); +- cupsFilePuts(fp, "*FileSystem: False\n"); +- cupsFilePuts(fp, "*PCFileName: \"ippeve.ppd\"\n"); ++ if ((attr = ippFindAttribute(supported, "printer-make-and-model", IPP_TAG_TEXT)) != NULL && ippValidateAttribute(attr)) ++ { ++ /* ++ * Sanitize the model name to only contain PPD-safe characters. ++ */ + +- if ((attr = ippFindAttribute(supported, "printer-make-and-model", IPP_TAG_TEXT)) != NULL) + strlcpy(make, ippGetString(attr, 0, NULL), sizeof(make)); ++ ++ for (mptr = make; *mptr; mptr ++) ++ { ++ if (*mptr < ' ' || *mptr >= 127 || *mptr == '\"') ++ { ++ /* ++ * Truncate the make and model on the first bad character... ++ */ ++ ++ *mptr = '\0'; ++ break; ++ } ++ } ++ ++ while (mptr > make) ++ { ++ /* ++ * Strip trailing whitespace... ++ */ ++ ++ mptr --; ++ if (*mptr == ' ') ++ *mptr = '\0'; ++ } ++ ++ if (!make[0]) ++ { ++ /* ++ * Use a default make and model if nothing remains... ++ */ ++ ++ strlcpy(make, "Unknown", sizeof(make)); ++ } ++ } + else +- strlcpy(make, "Unknown Printer", sizeof(make)); ++ { ++ /* ++ * Use a default make and model... ++ */ ++ ++ strlcpy(make, "Unknown", sizeof(make)); ++ } + + if (!_cups_strncasecmp(make, "Hewlett Packard ", 16) || !_cups_strncasecmp(make, "Hewlett-Packard ", 16)) + { ++ /* ++ * Normalize HP printer make and model... ++ */ ++ + model = make + 16; + strlcpy(make, "HP", sizeof(make)); ++ ++ if (!_cups_strncasecmp(model, "HP ", 3)) ++ model += 3; ++ } ++ else if ((mptr = strchr(make, ' ')) != NULL) ++ { ++ /* ++ * Separate "MAKE MODEL"... ++ */ ++ ++ while (*mptr && *mptr == ' ') ++ *mptr++ = '\0'; ++ ++ model = mptr; + } +- else if ((model = strchr(make, ' ')) != NULL) +- *model++ = '\0'; + else +- model = make; ++ { ++ /* ++ * No separate model name... ++ */ + ++ model = "Printer"; ++ } ++ ++ /* ++ * Standard stuff for PPD file... ++ */ ++ ++ cupsFilePuts(fp, "*PPD-Adobe: \"4.3\"\n"); ++ cupsFilePuts(fp, "*FormatVersion: \"4.3\"\n"); ++ cupsFilePrintf(fp, "*FileVersion: \"%d.%d\"\n", CUPS_VERSION_MAJOR, CUPS_VERSION_MINOR); ++ cupsFilePuts(fp, "*LanguageVersion: English\n"); ++ cupsFilePuts(fp, "*LanguageEncoding: ISOLatin1\n"); ++ cupsFilePuts(fp, "*PSVersion: \"(3010.000) 0\"\n"); ++ cupsFilePuts(fp, "*LanguageLevel: \"3\"\n"); ++ cupsFilePuts(fp, "*FileSystem: False\n"); ++ cupsFilePuts(fp, "*PCFileName: \"ippeve.ppd\"\n"); + cupsFilePrintf(fp, "*Manufacturer: \"%s\"\n", make); + cupsFilePrintf(fp, "*ModelName: \"%s\"\n", model); + cupsFilePrintf(fp, "*Product: \"(%s)\"\n", model); +@@ -3317,13 +3387,13 @@ _ppdCreateFromIPP2( + } + cupsFilePuts(fp, "\"\n"); + +- if ((attr = ippFindAttribute(supported, "printer-more-info", IPP_TAG_URI)) != NULL) ++ if ((attr = ippFindAttribute(supported, "printer-more-info", IPP_TAG_URI)) != NULL && ippValidateAttribute(attr)) + cupsFilePrintf(fp, "*APSupplies: \"%s\"\n", ippGetString(attr, 0, NULL)); + +- if ((attr = ippFindAttribute(supported, "printer-charge-info-uri", IPP_TAG_URI)) != NULL) ++ if ((attr = ippFindAttribute(supported, "printer-charge-info-uri", IPP_TAG_URI)) != NULL && ippValidateAttribute(attr)) + cupsFilePrintf(fp, "*cupsChargeInfoURI: \"%s\"\n", ippGetString(attr, 0, NULL)); + +- if ((attr = ippFindAttribute(supported, "printer-strings-uri", IPP_TAG_URI)) != NULL) ++ if ((attr = ippFindAttribute(supported, "printer-strings-uri", IPP_TAG_URI)) != NULL && ippValidateAttribute(attr)) + { + http_t *http = NULL; /* Connection to printer */ + char stringsfile[1024]; /* Temporary strings file */ +@@ -3367,7 +3437,7 @@ _ppdCreateFromIPP2( + + response = cupsDoRequest(http, request, resource); + +- if ((attr = ippFindAttribute(response, "printer-strings-uri", IPP_TAG_URI)) != NULL) ++ if ((attr = ippFindAttribute(response, "printer-strings-uri", IPP_TAG_URI)) != NULL && ippValidateAttribute(attr)) + cupsFilePrintf(fp, "*cupsStringsURI %s: \"%s\"\n", keyword, ippGetString(attr, 0, NULL)); + + ippDelete(response); +@@ -3389,10 +3459,10 @@ _ppdCreateFromIPP2( + if (ippGetBoolean(ippFindAttribute(supported, "job-accounting-user-id-supported", IPP_TAG_BOOLEAN), 0)) + cupsFilePuts(fp, "*cupsJobAccountingUserId: True\n"); + +- if ((attr = ippFindAttribute(supported, "printer-privacy-policy-uri", IPP_TAG_URI)) != NULL) ++ if ((attr = ippFindAttribute(supported, "printer-privacy-policy-uri", IPP_TAG_URI)) != NULL && ippValidateAttribute(attr)) + cupsFilePrintf(fp, "*cupsPrivacyURI: \"%s\"\n", ippGetString(attr, 0, NULL)); + +- if ((attr = ippFindAttribute(supported, "printer-mandatory-job-attributes", IPP_TAG_KEYWORD)) != NULL) ++ if ((attr = ippFindAttribute(supported, "printer-mandatory-job-attributes", IPP_TAG_KEYWORD)) != NULL && ippValidateAttribute(attr)) + { + char prefix = '\"'; // Prefix for string + +@@ -3410,7 +3480,7 @@ _ppdCreateFromIPP2( + cupsFilePuts(fp, "\"\n"); + } + +- if ((attr = ippFindAttribute(supported, "printer-requested-job-attributes", IPP_TAG_KEYWORD)) != NULL) ++ if ((attr = ippFindAttribute(supported, "printer-requested-job-attributes", IPP_TAG_KEYWORD)) != NULL && ippValidateAttribute(attr)) + { + char prefix = '\"'; // Prefix for string + +@@ -3973,18 +4043,16 @@ _ppdCreateFromIPP2( + cupsFilePrintf(fp, "*DefaultInputSlot: %s\n", ppdname); + + for (j = 0; j < (int)(sizeof(sources) / sizeof(sources[0])); j ++) ++ { + if (!strcmp(sources[j], keyword)) + { + snprintf(msgid, sizeof(msgid), "media-source.%s", keyword); + +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; +- + cupsFilePrintf(fp, "*InputSlot %s: \"<>setpagedevice\"\n", ppdname, j); +- cupsFilePrintf(fp, "*%s.InputSlot %s/%s: \"\"\n", lang->language, ppdname, msgstr); ++ ppd_put_string(fp, lang, strings, "InputSlot", ppdname, msgid); + break; + } ++ } + } + cupsFilePuts(fp, "*CloseUI: *InputSlot\n"); + } +@@ -4010,12 +4078,9 @@ _ppdCreateFromIPP2( + pwg_ppdize_name(keyword, ppdname, sizeof(ppdname)); + + snprintf(msgid, sizeof(msgid), "media-type.%s", keyword); +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; + + cupsFilePrintf(fp, "*MediaType %s: \"<>setpagedevice\"\n", ppdname, ppdname); +- cupsFilePrintf(fp, "*%s.MediaType %s/%s: \"\"\n", lang->language, ppdname, msgstr); ++ ppd_put_string(fp, lang, strings, "MediaType", ppdname, msgid); + } + cupsFilePuts(fp, "*CloseUI: *MediaType\n"); + } +@@ -4476,12 +4541,9 @@ _ppdCreateFromIPP2( + pwg_ppdize_name(keyword, ppdname, sizeof(ppdname)); + + snprintf(msgid, sizeof(msgid), "output-bin.%s", keyword); +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; + + cupsFilePrintf(fp, "*OutputBin %s: \"\"\n", ppdname); +- cupsFilePrintf(fp, "*%s.OutputBin %s/%s: \"\"\n", lang->language, ppdname, msgstr); ++ ppd_put_string(fp, lang, strings, "OutputBin", ppdname, msgid); + + if ((tray_ptr = ippGetOctetString(trays, i, &tray_len)) != NULL) + { +@@ -4600,9 +4662,6 @@ _ppdCreateFromIPP2( + cupsArrayAdd(names, (char *)keyword); + + snprintf(msgid, sizeof(msgid), "finishings.%d", value); +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; + + if (value >= IPP_FINISHINGS_NONE && value <= IPP_FINISHINGS_LAMINATE) + ppd_keyword = base_keywords[value - IPP_FINISHINGS_NONE]; +@@ -4617,7 +4676,7 @@ _ppdCreateFromIPP2( + continue; + + cupsFilePrintf(fp, "*StapleLocation %s: \"\"\n", ppd_keyword); +- cupsFilePrintf(fp, "*%s.StapleLocation %s/%s: \"\"\n", lang->language, ppd_keyword, msgstr); ++ ppd_put_string(fp, lang, strings, "StapleLocation", ppd_keyword, msgid); + cupsFilePrintf(fp, "*cupsIPPFinishings %d/%s: \"*StapleLocation %s\"\n", value, keyword, ppd_keyword); + } + +@@ -4680,9 +4739,6 @@ _ppdCreateFromIPP2( + cupsArrayAdd(names, (char *)keyword); + + snprintf(msgid, sizeof(msgid), "finishings.%d", value); +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; + + if (value >= IPP_FINISHINGS_NONE && value <= IPP_FINISHINGS_LAMINATE) + ppd_keyword = base_keywords[value - IPP_FINISHINGS_NONE]; +@@ -4697,7 +4753,7 @@ _ppdCreateFromIPP2( + continue; + + cupsFilePrintf(fp, "*FoldType %s: \"\"\n", ppd_keyword); +- cupsFilePrintf(fp, "*%s.FoldType %s/%s: \"\"\n", lang->language, ppd_keyword, msgstr); ++ ppd_put_string(fp, lang, strings, "FoldType", ppd_keyword, msgid); + cupsFilePrintf(fp, "*cupsIPPFinishings %d/%s: \"*FoldType %s\"\n", value, keyword, ppd_keyword); + } + +@@ -4768,9 +4824,6 @@ _ppdCreateFromIPP2( + cupsArrayAdd(names, (char *)keyword); + + snprintf(msgid, sizeof(msgid), "finishings.%d", value); +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; + + if (value >= IPP_FINISHINGS_NONE && value <= IPP_FINISHINGS_LAMINATE) + ppd_keyword = base_keywords[value - IPP_FINISHINGS_NONE]; +@@ -4785,7 +4838,7 @@ _ppdCreateFromIPP2( + continue; + + cupsFilePrintf(fp, "*PunchMedia %s: \"\"\n", ppd_keyword); +- cupsFilePrintf(fp, "*%s.PunchMedia %s/%s: \"\"\n", lang->language, ppd_keyword, msgstr); ++ ppd_put_string(fp, lang, strings, "PunchMedia", ppd_keyword, msgid); + cupsFilePrintf(fp, "*cupsIPPFinishings %d/%s: \"*PunchMedia %s\"\n", value, keyword, ppd_keyword); + } + +@@ -4856,9 +4909,6 @@ _ppdCreateFromIPP2( + cupsArrayAdd(names, (char *)keyword); + + snprintf(msgid, sizeof(msgid), "finishings.%d", value); +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; + + if (value == IPP_FINISHINGS_TRIM) + ppd_keyword = "Auto"; +@@ -4866,7 +4916,7 @@ _ppdCreateFromIPP2( + ppd_keyword = trim_keywords[value - IPP_FINISHINGS_TRIM_AFTER_PAGES]; + + cupsFilePrintf(fp, "*CutMedia %s: \"\"\n", ppd_keyword); +- cupsFilePrintf(fp, "*%s.CutMedia %s/%s: \"\"\n", lang->language, ppd_keyword, msgstr); ++ ppd_put_string(fp, lang, strings, "CutMedia", ppd_keyword, msgid); + cupsFilePrintf(fp, "*cupsIPPFinishings %d/%s: \"*CutMedia %s\"\n", value, keyword, ppd_keyword); + } + +@@ -4905,12 +4955,11 @@ _ppdCreateFromIPP2( + + cupsArrayAdd(templates, (void *)keyword); + ++ pwg_ppdize_name(keyword, ppdname, sizeof(ppdname)); ++ + snprintf(msgid, sizeof(msgid), "finishing-template.%s", keyword); +- if ((msgstr = _cupsLangString(lang, msgid)) == msgid || !strcmp(msgid, msgstr)) +- if ((msgstr = _cupsMessageLookup(strings, msgid)) == msgid) +- msgstr = keyword; + +- cupsFilePrintf(fp, "*cupsFinishingTemplate %s: \"\n", keyword); ++ cupsFilePrintf(fp, "*cupsFinishingTemplate %s: \"\n", ppdname); + for (finishing_attr = ippFirstAttribute(finishing_col); finishing_attr; finishing_attr = ippNextAttribute(finishing_col)) + { + if (ippGetValueTag(finishing_attr) == IPP_TAG_BEGIN_COLLECTION) +@@ -4923,7 +4972,7 @@ _ppdCreateFromIPP2( + } + } + cupsFilePuts(fp, "\"\n"); +- cupsFilePrintf(fp, "*%s.cupsFinishingTemplate %s/%s: \"\"\n", lang->language, keyword, msgstr); ++ ppd_put_string(fp, lang, strings, "cupsFinishingTemplate", ppdname, msgid); + cupsFilePuts(fp, "*End\n"); + } + +@@ -4959,9 +5008,8 @@ _ppdCreateFromIPP2( + { + ipp_t *preset = ippGetCollection(attr, i); + /* Preset collection */ +- const char *preset_name = ippGetString(ippFindAttribute(preset, "preset-name", IPP_TAG_ZERO), 0, NULL), ++ const char *preset_name = ippGetString(ippFindAttribute(preset, "preset-name", IPP_TAG_ZERO), 0, NULL); + /* Preset name */ +- *localized_name; /* Localized preset name */ + ipp_attribute_t *member; /* Member attribute in preset */ + const char *member_name; /* Member attribute name */ + char member_value[256]; /* Member attribute value */ +@@ -4969,7 +5017,8 @@ _ppdCreateFromIPP2( + if (!preset || !preset_name) + continue; + +- cupsFilePrintf(fp, "*APPrinterPreset %s: \"\n", preset_name); ++ pwg_ppdize_name(preset_name, ppdname, sizeof(ppdname)); ++ cupsFilePrintf(fp, "*APPrinterPreset %s: \"\n", ppdname); + for (member = ippFirstAttribute(preset); member; member = ippNextAttribute(preset)) + { + member_name = ippGetName(member); +@@ -5010,7 +5059,10 @@ _ppdCreateFromIPP2( + fin_col = ippGetCollection(member, i); + + if ((keyword = ippGetString(ippFindAttribute(fin_col, "finishing-template", IPP_TAG_ZERO), 0, NULL)) != NULL) +- cupsFilePrintf(fp, "*cupsFinishingTemplate %s\n", keyword); ++ { ++ pwg_ppdize_name(keyword, ppdname, sizeof(ppdname)); ++ cupsFilePrintf(fp, "*cupsFinishingTemplate %s\n", ppdname); ++ } + } + } + else if (!strcmp(member_name, "media")) +@@ -5037,13 +5089,13 @@ _ppdCreateFromIPP2( + if ((keyword = ippGetString(ippFindAttribute(media_col, "media-source", IPP_TAG_ZERO), 0, NULL)) != NULL) + { + pwg_ppdize_name(keyword, ppdname, sizeof(ppdname)); +- cupsFilePrintf(fp, "*InputSlot %s\n", keyword); ++ cupsFilePrintf(fp, "*InputSlot %s\n", ppdname); + } + + if ((keyword = ippGetString(ippFindAttribute(media_col, "media-type", IPP_TAG_ZERO), 0, NULL)) != NULL) + { + pwg_ppdize_name(keyword, ppdname, sizeof(ppdname)); +- cupsFilePrintf(fp, "*MediaType %s\n", keyword); ++ cupsFilePrintf(fp, "*MediaType %s\n", ppdname); + } + } + else if (!strcmp(member_name, "print-quality")) +@@ -5088,8 +5140,9 @@ _ppdCreateFromIPP2( + + cupsFilePuts(fp, "\"\n*End\n"); + +- if ((localized_name = _cupsMessageLookup(strings, preset_name)) != preset_name) +- cupsFilePrintf(fp, "*%s.APPrinterPreset %s/%s: \"\"\n", lang->language, preset_name, localized_name); ++ snprintf(msgid, sizeof(msgid), "preset-name.%s", preset_name); ++ pwg_ppdize_name(preset_name, ppdname, sizeof(ppdname)); ++ ppd_put_string(fp, lang, strings, "APPrinterPreset", ppdname, msgid); + } + } + +@@ -5360,6 +5413,43 @@ cups_get_url(http_t **http, /* IO - Current HTTP connection */ + } + + ++/* ++ * 'ppd_put_strings()' - Write localization attributes to a PPD file. ++ */ ++ ++static void ++ppd_put_string(cups_file_t *fp, /* I - PPD file */ ++ cups_lang_t *lang, /* I - Language */ ++ cups_array_t *strings, /* I - Strings */ ++ const char *ppd_option,/* I - PPD option */ ++ const char *ppd_choice,/* I - PPD choice */ ++ const char *pwg_msgid) /* I - PWG message ID */ ++{ ++ const char *text; /* Localized text */ ++ ++ ++ if ((text = _cupsLangString(lang, pwg_msgid)) == pwg_msgid || !strcmp(pwg_msgid, text)) ++ { ++ if ((text = _cupsMessageLookup(strings, pwg_msgid)) == pwg_msgid) ++ return; ++ } ++ ++ // Add the first line of localized text... ++ cupsFilePrintf(fp, "*%s.%s %s/", lang->language, ppd_option, ppd_choice); ++ while (*text && *text != '\n') ++ { ++ // Escape ":" and "<"... ++ if (*text == ':' || *text == '<') ++ cupsFilePrintf(fp, "<%02X>", *text); ++ else ++ cupsFilePutChar(fp, *text); ++ ++ text ++; ++ } ++ cupsFilePuts(fp, ": \"\"\n"); ++} ++ ++ + /* + * 'pwg_add_finishing()' - Add a finishings value. + */ +@@ -5473,7 +5563,7 @@ pwg_ppdize_name(const char *ipp, /* I - IPP keyword */ + *end; /* End of name buffer */ + + +- if (!ipp) ++ if (!ipp || !_cups_isalnum(*ipp)) + { + *name = '\0'; + return; +@@ -5488,8 +5578,14 @@ pwg_ppdize_name(const char *ipp, /* I - IPP keyword */ + ipp ++; + *ptr++ = (char)toupper(*ipp++ & 255); + } +- else ++ else if (*ipp == '_' || *ipp == '.' || *ipp == '-' || _cups_isalnum(*ipp)) ++ { + *ptr++ = *ipp++; ++ } ++ else ++ { ++ ipp ++; ++ } + } + + *ptr = '\0';