diff options
Diffstat (limited to 'builtin-mailinfo.c')
-rw-r--r-- | builtin-mailinfo.c | 994 |
1 files changed, 0 insertions, 994 deletions
diff --git a/builtin-mailinfo.c b/builtin-mailinfo.c deleted file mode 100644 index 97c1ff9744..0000000000 --- a/builtin-mailinfo.c +++ /dev/null @@ -1,994 +0,0 @@ -/* - * Another stupid program, this one parsing the headers of an - * email to figure out authorship and subject - */ -#include "cache.h" -#include "builtin.h" -#include "utf8.h" - -static FILE *cmitmsg, *patchfile, *fin, *fout; - -static int keep_subject; -static const char *metainfo_charset; -static char line[1000]; -static char name[1000]; -static char email[1000]; - -static enum { - TE_DONTCARE, TE_QP, TE_BASE64, -} transfer_encoding; -static enum { - TYPE_TEXT, TYPE_OTHER, -} message_type; - -static char charset[256]; -static int patch_lines; -static char **p_hdr_data, **s_hdr_data; - -#define MAX_HDR_PARSED 10 -#define MAX_BOUNDARIES 5 - -static char *sanity_check(char *name, char *email) -{ - int len = strlen(name); - if (len < 3 || len > 60) - return email; - if (strchr(name, '@') || strchr(name, '<') || strchr(name, '>')) - return email; - return name; -} - -static int bogus_from(char *line) -{ - /* John Doe <johndoe> */ - char *bra, *ket, *dst, *cp; - - /* This is fallback, so do not bother if we already have an - * e-mail address. - */ - if (*email) - return 0; - - bra = strchr(line, '<'); - if (!bra) - return 0; - ket = strchr(bra, '>'); - if (!ket) - return 0; - - for (dst = email, cp = bra+1; cp < ket; ) - *dst++ = *cp++; - *dst = 0; - for (cp = line; isspace(*cp); cp++) - ; - for (bra--; isspace(*bra); bra--) - *bra = 0; - cp = sanity_check(cp, email); - strcpy(name, cp); - return 1; -} - -static int handle_from(char *in_line) -{ - char line[1000]; - char *at; - char *dst; - - strcpy(line, in_line); - at = strchr(line, '@'); - if (!at) - return bogus_from(line); - - /* - * If we already have one email, don't take any confusing lines - */ - if (*email && strchr(at+1, '@')) - return 0; - - /* Pick up the string around '@', possibly delimited with <> - * pair; that is the email part. White them out while copying. - */ - while (at > line) { - char c = at[-1]; - if (isspace(c)) - break; - if (c == '<') { - at[-1] = ' '; - break; - } - at--; - } - dst = email; - for (;;) { - unsigned char c = *at; - if (!c || c == '>' || isspace(c)) { - if (c == '>') - *at = ' '; - break; - } - *at++ = ' '; - *dst++ = c; - } - *dst++ = 0; - - /* The remainder is name. It could be "John Doe <john.doe@xz>" - * or "john.doe@xz (John Doe)", but we have whited out the - * email part, so trim from both ends, possibly removing - * the () pair at the end. - */ - at = line + strlen(line); - while (at > line) { - unsigned char c = *--at; - if (!isspace(c)) { - at[(c == ')') ? 0 : 1] = 0; - break; - } - } - - at = line; - for (;;) { - unsigned char c = *at; - if (!c || !isspace(c)) { - if (c == '(') - at++; - break; - } - at++; - } - at = sanity_check(at, email); - strcpy(name, at); - return 1; -} - -static int handle_header(char *line, char *data, int ofs) -{ - if (!line || !data) - return 1; - - strcpy(data, line+ofs); - - return 0; -} - -/* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt - * to have enough heuristics to grok MIME encoded patches often found - * on our mailing lists. For example, we do not even treat header lines - * case insensitively. - */ - -static int slurp_attr(const char *line, const char *name, char *attr) -{ - const char *ends, *ap = strcasestr(line, name); - size_t sz; - - if (!ap) { - *attr = 0; - return 0; - } - ap += strlen(name); - if (*ap == '"') { - ap++; - ends = "\""; - } - else - ends = "; \t"; - sz = strcspn(ap, ends); - memcpy(attr, ap, sz); - attr[sz] = 0; - return 1; -} - -struct content_type { - char *boundary; - int boundary_len; -}; - -static struct content_type content[MAX_BOUNDARIES]; - -static struct content_type *content_top = content; - -static int handle_content_type(char *line) -{ - char boundary[256]; - - if (strcasestr(line, "text/") == NULL) - message_type = TYPE_OTHER; - if (slurp_attr(line, "boundary=", boundary + 2)) { - memcpy(boundary, "--", 2); - if (content_top++ >= &content[MAX_BOUNDARIES]) { - fprintf(stderr, "Too many boundaries to handle\n"); - exit(1); - } - content_top->boundary_len = strlen(boundary); - content_top->boundary = xmalloc(content_top->boundary_len+1); - strcpy(content_top->boundary, boundary); - } - if (slurp_attr(line, "charset=", charset)) { - int i, c; - for (i = 0; (c = charset[i]) != 0; i++) - charset[i] = tolower(c); - } - return 0; -} - -static int handle_content_transfer_encoding(char *line) -{ - if (strcasestr(line, "base64")) - transfer_encoding = TE_BASE64; - else if (strcasestr(line, "quoted-printable")) - transfer_encoding = TE_QP; - else - transfer_encoding = TE_DONTCARE; - return 0; -} - -static int is_multipart_boundary(const char *line) -{ - return (!memcmp(line, content_top->boundary, content_top->boundary_len)); -} - -static int eatspace(char *line) -{ - int len = strlen(line); - while (len > 0 && isspace(line[len-1])) - line[--len] = 0; - return len; -} - -static char *cleanup_subject(char *subject) -{ - for (;;) { - char *p; - int len, remove; - switch (*subject) { - case 'r': case 'R': - if (!memcmp("e:", subject+1, 2)) { - subject += 3; - continue; - } - break; - case ' ': case '\t': case ':': - subject++; - continue; - - case '[': - p = strchr(subject, ']'); - if (!p) { - subject++; - continue; - } - len = strlen(p); - remove = p - subject; - if (remove <= len *2) { - subject = p+1; - continue; - } - break; - } - eatspace(subject); - return subject; - } -} - -static void cleanup_space(char *buf) -{ - unsigned char c; - while ((c = *buf) != 0) { - buf++; - if (isspace(c)) { - buf[-1] = ' '; - c = *buf; - while (isspace(c)) { - int len = strlen(buf); - memmove(buf, buf+1, len); - c = *buf; - } - } - } -} - -static void decode_header(char *it, unsigned itsize); -static const char *header[MAX_HDR_PARSED] = { - "From","Subject","Date", -}; - -static int check_header(char *line, unsigned linesize, char **hdr_data, int overwrite) -{ - int i; - - /* search for the interesting parts */ - for (i = 0; header[i]; i++) { - int len = strlen(header[i]); - if ((!hdr_data[i] || overwrite) && - !strncasecmp(line, header[i], len) && - line[len] == ':' && isspace(line[len + 1])) { - /* Unwrap inline B and Q encoding, and optionally - * normalize the meta information to utf8. - */ - decode_header(line + len + 2, linesize - len - 2); - hdr_data[i] = xmalloc(1000 * sizeof(char)); - if (! handle_header(line, hdr_data[i], len + 2)) { - return 1; - } - } - } - - /* Content stuff */ - if (!strncasecmp(line, "Content-Type", 12) && - line[12] == ':' && isspace(line[12 + 1])) { - decode_header(line + 12 + 2, linesize - 12 - 2); - if (! handle_content_type(line)) { - return 1; - } - } - if (!strncasecmp(line, "Content-Transfer-Encoding", 25) && - line[25] == ':' && isspace(line[25 + 1])) { - decode_header(line + 25 + 2, linesize - 25 - 2); - if (! handle_content_transfer_encoding(line)) { - return 1; - } - } - - /* for inbody stuff */ - if (!memcmp(">From", line, 5) && isspace(line[5])) - return 1; - if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) { - for (i = 0; header[i]; i++) { - if (!memcmp("Subject: ", header[i], 9)) { - if (! handle_header(line, hdr_data[i], 0)) { - return 1; - } - } - } - } - - /* no match */ - return 0; -} - -static int is_rfc2822_header(char *line) -{ - /* - * The section that defines the loosest possible - * field name is "3.6.8 Optional fields". - * - * optional-field = field-name ":" unstructured CRLF - * field-name = 1*ftext - * ftext = %d33-57 / %59-126 - */ - int ch; - char *cp = line; - - /* Count mbox From headers as headers */ - if (!memcmp(line, "From ", 5) || !memcmp(line, ">From ", 6)) - return 1; - - while ((ch = *cp++)) { - if (ch == ':') - return cp != line; - if ((33 <= ch && ch <= 57) || - (59 <= ch && ch <= 126)) - continue; - break; - } - return 0; -} - -/* - * sz is size of 'line' buffer in bytes. Must be reasonably - * long enough to hold one physical real-world e-mail line. - */ -static int read_one_header_line(char *line, int sz, FILE *in) -{ - int len; - - /* - * We will read at most (sz-1) bytes and then potentially - * re-add NUL after it. Accessing line[sz] after this is safe - * and we can allow len to grow up to and including sz. - */ - sz--; - - /* Get the first part of the line. */ - if (!fgets(line, sz, in)) - return 0; - - /* - * Is it an empty line or not a valid rfc2822 header? - * If so, stop here, and return false ("not a header") - */ - len = eatspace(line); - if (!len || !is_rfc2822_header(line)) { - /* Re-add the newline */ - line[len] = '\n'; - line[len + 1] = '\0'; - return 0; - } - - /* - * Now we need to eat all the continuation lines.. - * Yuck, 2822 header "folding" - */ - for (;;) { - int peek, addlen; - static char continuation[1000]; - - peek = fgetc(in); ungetc(peek, in); - if (peek != ' ' && peek != '\t') - break; - if (!fgets(continuation, sizeof(continuation), in)) - break; - addlen = eatspace(continuation); - if (len < sz - 1) { - if (addlen >= sz - len) - addlen = sz - len - 1; - memcpy(line + len, continuation, addlen); - line[len] = '\n'; - len += addlen; - } - } - line[len] = 0; - - return 1; -} - -static int decode_q_segment(char *in, char *ot, unsigned otsize, char *ep, int rfc2047) -{ - char *otbegin = ot; - char *otend = ot + otsize; - int c; - while ((c = *in++) != 0 && (in <= ep)) { - if (ot == otend) { - *--ot = '\0'; - return -1; - } - if (c == '=') { - int d = *in++; - if (d == '\n' || !d) - break; /* drop trailing newline */ - *ot++ = ((hexval(d) << 4) | hexval(*in++)); - continue; - } - if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */ - c = 0x20; - *ot++ = c; - } - *ot = 0; - return (ot - otbegin); -} - -static int decode_b_segment(char *in, char *ot, unsigned otsize, char *ep) -{ - /* Decode in..ep, possibly in-place to ot */ - int c, pos = 0, acc = 0; - char *otbegin = ot; - char *otend = ot + otsize; - - while ((c = *in++) != 0 && (in <= ep)) { - if (ot == otend) { - *--ot = '\0'; - return -1; - } - if (c == '+') - c = 62; - else if (c == '/') - c = 63; - else if ('A' <= c && c <= 'Z') - c -= 'A'; - else if ('a' <= c && c <= 'z') - c -= 'a' - 26; - else if ('0' <= c && c <= '9') - c -= '0' - 52; - else if (c == '=') { - /* padding is almost like (c == 0), except we do - * not output NUL resulting only from it; - * for now we just trust the data. - */ - c = 0; - } - else - continue; /* garbage */ - switch (pos++) { - case 0: - acc = (c << 2); - break; - case 1: - *ot++ = (acc | (c >> 4)); - acc = (c & 15) << 4; - break; - case 2: - *ot++ = (acc | (c >> 2)); - acc = (c & 3) << 6; - break; - case 3: - *ot++ = (acc | c); - acc = pos = 0; - break; - } - } - *ot = 0; - return (ot - otbegin); -} - -/* - * When there is no known charset, guess. - * - * Right now we assume that if the target is UTF-8 (the default), - * and it already looks like UTF-8 (which includes US-ASCII as its - * subset, of course) then that is what it is and there is nothing - * to do. - * - * Otherwise, we default to assuming it is Latin1 for historical - * reasons. - */ -static const char *guess_charset(const char *line, const char *target_charset) -{ - if (is_encoding_utf8(target_charset)) { - if (is_utf8(line)) - return NULL; - } - return "latin1"; -} - -static void convert_to_utf8(char *line, unsigned linesize, const char *charset) -{ - char *out; - - if (!charset || !*charset) { - charset = guess_charset(line, metainfo_charset); - if (!charset) - return; - } - - if (!strcmp(metainfo_charset, charset)) - return; - out = reencode_string(line, metainfo_charset, charset); - if (!out) - die("cannot convert from %s to %s\n", - charset, metainfo_charset); - strlcpy(line, out, linesize); - free(out); -} - -static int decode_header_bq(char *it, unsigned itsize) -{ - char *in, *out, *ep, *cp, *sp; - char outbuf[1000]; - int rfc2047 = 0; - - in = it; - out = outbuf; - while ((ep = strstr(in, "=?")) != NULL) { - int sz, encoding; - char charset_q[256], piecebuf[256]; - rfc2047 = 1; - - if (in != ep) { - sz = ep - in; - memcpy(out, in, sz); - out += sz; - in += sz; - } - /* E.g. - * ep : "=?iso-2022-jp?B?GyR...?= foo" - * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz" - */ - ep += 2; - cp = strchr(ep, '?'); - if (!cp) - return rfc2047; /* no munging */ - for (sp = ep; sp < cp; sp++) - charset_q[sp - ep] = tolower(*sp); - charset_q[cp - ep] = 0; - encoding = cp[1]; - if (!encoding || cp[2] != '?') - return rfc2047; /* no munging */ - ep = strstr(cp + 3, "?="); - if (!ep) - return rfc2047; /* no munging */ - switch (tolower(encoding)) { - default: - return rfc2047; /* no munging */ - case 'b': - sz = decode_b_segment(cp + 3, piecebuf, sizeof(piecebuf), ep); - break; - case 'q': - sz = decode_q_segment(cp + 3, piecebuf, sizeof(piecebuf), ep, 1); - break; - } - if (sz < 0) - return rfc2047; - if (metainfo_charset) - convert_to_utf8(piecebuf, sizeof(piecebuf), charset_q); - - sz = strlen(piecebuf); - if (outbuf + sizeof(outbuf) <= out + sz) - return rfc2047; /* no munging */ - strcpy(out, piecebuf); - out += sz; - in = ep + 2; - } - strcpy(out, in); - strlcpy(it, outbuf, itsize); - return rfc2047; -} - -static void decode_header(char *it, unsigned itsize) -{ - - if (decode_header_bq(it, itsize)) - return; - /* otherwise "it" is a straight copy of the input. - * This can be binary guck but there is no charset specified. - */ - if (metainfo_charset) - convert_to_utf8(it, itsize, ""); -} - -static int decode_transfer_encoding(char *line, unsigned linesize, int inputlen) -{ - char *ep; - - switch (transfer_encoding) { - case TE_QP: - ep = line + inputlen; - return decode_q_segment(line, line, linesize, ep, 0); - case TE_BASE64: - ep = line + inputlen; - return decode_b_segment(line, line, linesize, ep); - case TE_DONTCARE: - default: - return inputlen; - } -} - -static int handle_filter(char *line, unsigned linesize, int linelen); - -static int find_boundary(void) -{ - while(fgets(line, sizeof(line), fin) != NULL) { - if (is_multipart_boundary(line)) - return 1; - } - return 0; -} - -static int handle_boundary(void) -{ - char newline[]="\n"; -again: - if (!memcmp(line+content_top->boundary_len, "--", 2)) { - /* we hit an end boundary */ - /* pop the current boundary off the stack */ - free(content_top->boundary); - - /* technically won't happen as is_multipart_boundary() - will fail first. But just in case.. - */ - if (content_top-- < content) { - fprintf(stderr, "Detected mismatched boundaries, " - "can't recover\n"); - exit(1); - } - handle_filter(newline, sizeof(newline), strlen(newline)); - - /* skip to the next boundary */ - if (!find_boundary()) - return 0; - goto again; - } - - /* set some defaults */ - transfer_encoding = TE_DONTCARE; - charset[0] = 0; - message_type = TYPE_TEXT; - - /* slurp in this section's info */ - while (read_one_header_line(line, sizeof(line), fin)) - check_header(line, sizeof(line), p_hdr_data, 0); - - /* eat the blank line after section info */ - return (fgets(line, sizeof(line), fin) != NULL); -} - -static inline int patchbreak(const char *line) -{ - /* Beginning of a "diff -" header? */ - if (!memcmp("diff -", line, 6)) - return 1; - - /* CVS "Index: " line? */ - if (!memcmp("Index: ", line, 7)) - return 1; - - /* - * "--- <filename>" starts patches without headers - * "---<sp>*" is a manual separator - */ - if (!memcmp("---", line, 3)) { - line += 3; - /* space followed by a filename? */ - if (line[0] == ' ' && !isspace(line[1])) - return 1; - /* Just whitespace? */ - for (;;) { - unsigned char c = *line++; - if (c == '\n') - return 1; - if (!isspace(c)) - break; - } - return 0; - } - return 0; -} - - -static int handle_commit_msg(char *line, unsigned linesize) -{ - static int still_looking = 1; - char *endline = line + linesize; - - if (!cmitmsg) - return 0; - - if (still_looking) { - char *cp = line; - if (isspace(*line)) { - for (cp = line + 1; *cp; cp++) { - if (!isspace(*cp)) - break; - } - if (!*cp) - return 0; - } - if ((still_looking = check_header(cp, endline - cp, s_hdr_data, 0)) != 0) - return 0; - } - - /* normalize the log message to UTF-8. */ - if (metainfo_charset) - convert_to_utf8(line, endline - line, charset); - - if (patchbreak(line)) { - fclose(cmitmsg); - cmitmsg = NULL; - return 1; - } - - fputs(line, cmitmsg); - return 0; -} - -static int handle_patch(char *line, int len) -{ - fwrite(line, 1, len, patchfile); - patch_lines++; - return 0; -} - -static int handle_filter(char *line, unsigned linesize, int linelen) -{ - static int filter = 0; - - /* filter tells us which part we left off on - * a non-zero return indicates we hit a filter point - */ - switch (filter) { - case 0: - if (!handle_commit_msg(line, linesize)) - break; - filter++; - case 1: - if (!handle_patch(line, linelen)) - break; - filter++; - default: - return 1; - } - - return 0; -} - -static void handle_body(void) -{ - int rc = 0; - static char newline[2000]; - static char *np = newline; - int len = strlen(line); - - /* Skip up to the first boundary */ - if (content_top->boundary) { - if (!find_boundary()) - return; - } - - do { - /* process any boundary lines */ - if (content_top->boundary && is_multipart_boundary(line)) { - /* flush any leftover */ - if (np != newline) - handle_filter(newline, sizeof(newline), - np - newline); - if (!handle_boundary()) - return; - } - - /* Unwrap transfer encoding */ - len = decode_transfer_encoding(line, sizeof(line), len); - if (len < 0) { - error("Malformed input line"); - return; - } - - switch (transfer_encoding) { - case TE_BASE64: - case TE_QP: - { - char *op = line; - - /* binary data most likely doesn't have newlines */ - if (message_type != TYPE_TEXT) { - rc = handle_filter(line, sizeof(line), len); - break; - } - - /* - * This is a decoded line that may contain - * multiple new lines. Pass only one chunk - * at a time to handle_filter() - */ - do { - while (op < line + len && *op != '\n') - *np++ = *op++; - *np = *op; - if (*np != 0) { - /* should be sitting on a new line */ - *(++np) = 0; - op++; - rc = handle_filter(newline, sizeof(newline), np - newline); - np = newline; - } - } while (op < line + len); - /* - * The partial chunk is saved in newline and will be - * appended by the next iteration of read_line_with_nul(). - */ - break; - } - default: - rc = handle_filter(line, sizeof(line), len); - } - if (rc) - /* nothing left to filter */ - break; - } while ((len = read_line_with_nul(line, sizeof(line), fin))); - - return; -} - -static void output_header_lines(FILE *fout, const char *hdr, char *data) -{ - while (1) { - char *ep = strchr(data, '\n'); - int len; - if (!ep) - len = strlen(data); - else - len = ep - data; - fprintf(fout, "%s: %.*s\n", hdr, len, data); - if (!ep) - break; - data = ep + 1; - } -} - -static void handle_info(void) -{ - char *sub; - char *hdr; - int i; - - for (i = 0; header[i]; i++) { - - /* only print inbody headers if we output a patch file */ - if (patch_lines && s_hdr_data[i]) - hdr = s_hdr_data[i]; - else if (p_hdr_data[i]) - hdr = p_hdr_data[i]; - else - continue; - - if (!memcmp(header[i], "Subject", 7)) { - if (keep_subject) - sub = hdr; - else { - sub = cleanup_subject(hdr); - cleanup_space(sub); - } - output_header_lines(fout, "Subject", sub); - } else if (!memcmp(header[i], "From", 4)) { - handle_from(hdr); - fprintf(fout, "Author: %s\n", name); - fprintf(fout, "Email: %s\n", email); - } else { - cleanup_space(hdr); - fprintf(fout, "%s: %s\n", header[i], hdr); - } - } - fprintf(fout, "\n"); -} - -static int mailinfo(FILE *in, FILE *out, int ks, const char *encoding, - const char *msg, const char *patch) -{ - int peek; - keep_subject = ks; - metainfo_charset = encoding; - fin = in; - fout = out; - - cmitmsg = fopen(msg, "w"); - if (!cmitmsg) { - perror(msg); - return -1; - } - patchfile = fopen(patch, "w"); - if (!patchfile) { - perror(patch); - fclose(cmitmsg); - return -1; - } - - p_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(char *)); - s_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(char *)); - - do { - peek = fgetc(in); - } while (isspace(peek)); - ungetc(peek, in); - - /* process the email header */ - while (read_one_header_line(line, sizeof(line), fin)) - check_header(line, sizeof(line), p_hdr_data, 1); - - handle_body(); - handle_info(); - - return 0; -} - -static const char mailinfo_usage[] = - "git-mailinfo [-k] [-u | --encoding=<encoding>] msg patch <mail >info"; - -int cmd_mailinfo(int argc, const char **argv, const char *prefix) -{ - const char *def_charset; - - /* NEEDSWORK: might want to do the optional .git/ directory - * discovery - */ - git_config(git_default_config, NULL); - - def_charset = (git_commit_encoding ? git_commit_encoding : "utf-8"); - metainfo_charset = def_charset; - - while (1 < argc && argv[1][0] == '-') { - if (!strcmp(argv[1], "-k")) - keep_subject = 1; - else if (!strcmp(argv[1], "-u")) - metainfo_charset = def_charset; - else if (!strcmp(argv[1], "-n")) - metainfo_charset = NULL; - else if (!prefixcmp(argv[1], "--encoding=")) - metainfo_charset = argv[1] + 11; - else - usage(mailinfo_usage); - argc--; argv++; - } - - if (argc != 3) - usage(mailinfo_usage); - - return !!mailinfo(stdin, stdout, keep_subject, metainfo_charset, argv[1], argv[2]); -} |