597c9cc540
Also make platform specific part more isolated. Currently we only have Darwin defined, but I've taken a look at SunOS specific patch (which I dropped on the floor for now) as well. Doing things this way would make adding it easier. Signed-off-by: Junio C Hamano <junkio@cox.net>
750 lines
15 KiB
C
750 lines
15 KiB
C
/*
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* Another stupid program, this one parsing the headers of an
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* email to figure out authorship and subject
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <iconv.h>
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static FILE *cmitmsg, *patchfile;
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static int keep_subject = 0;
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static int metainfo_utf8 = 0;
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static char line[1000];
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static char date[1000];
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static char name[1000];
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static char email[1000];
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static char subject[1000];
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static enum {
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TE_DONTCARE, TE_QP, TE_BASE64,
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} transfer_encoding;
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static char charset[256];
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static char multipart_boundary[1000];
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static int multipart_boundary_len;
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static int patch_lines = 0;
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static char *sanity_check(char *name, char *email)
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{
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int len = strlen(name);
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if (len < 3 || len > 60)
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return email;
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if (strchr(name, '@') || strchr(name, '<') || strchr(name, '>'))
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return email;
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return name;
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}
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static int handle_from(char *line)
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{
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char *at = strchr(line, '@');
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char *dst;
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if (!at)
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return 0;
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/*
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* If we already have one email, don't take any confusing lines
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*/
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if (*email && strchr(at+1, '@'))
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return 0;
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/* Pick up the string around '@', possibly delimited with <>
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* pair; that is the email part. White them out while copying.
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*/
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while (at > line) {
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char c = at[-1];
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if (isspace(c))
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break;
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if (c == '<') {
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at[-1] = ' ';
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break;
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}
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at--;
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}
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dst = email;
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for (;;) {
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unsigned char c = *at;
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if (!c || c == '>' || isspace(c)) {
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if (c == '>')
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*at = ' ';
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break;
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}
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*at++ = ' ';
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*dst++ = c;
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}
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*dst++ = 0;
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/* The remainder is name. It could be "John Doe <john.doe@xz>"
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* or "john.doe@xz (John Doe)", but we have whited out the
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* email part, so trim from both ends, possibly removing
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* the () pair at the end.
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*/
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at = line + strlen(line);
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while (at > line) {
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unsigned char c = *--at;
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if (!isspace(c)) {
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at[(c == ')') ? 0 : 1] = 0;
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break;
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}
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}
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at = line;
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for (;;) {
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unsigned char c = *at;
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if (!c || !isspace(c)) {
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if (c == '(')
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at++;
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break;
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}
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at++;
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}
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at = sanity_check(at, email);
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strcpy(name, at);
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return 1;
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}
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static int handle_date(char *line)
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{
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strcpy(date, line);
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return 0;
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}
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static int handle_subject(char *line)
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{
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strcpy(subject, line);
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return 0;
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}
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/* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt
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* to have enough heuristics to grok MIME encoded patches often found
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* on our mailing lists. For example, we do not even treat header lines
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* case insensitively.
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*/
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static int slurp_attr(const char *line, const char *name, char *attr)
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{
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char *ends, *ap = strcasestr(line, name);
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size_t sz;
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if (!ap) {
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*attr = 0;
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return 0;
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}
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ap += strlen(name);
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if (*ap == '"') {
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ap++;
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ends = "\"";
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}
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else
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ends = "; \t";
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sz = strcspn(ap, ends);
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memcpy(attr, ap, sz);
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attr[sz] = 0;
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return 1;
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}
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static int handle_subcontent_type(char *line)
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{
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/* We do not want to mess with boundary. Note that we do not
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* handle nested multipart.
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*/
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if (strcasestr(line, "boundary=")) {
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fprintf(stderr, "Not handling nested multipart message.\n");
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exit(1);
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}
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slurp_attr(line, "charset=", charset);
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if (*charset) {
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int i, c;
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for (i = 0; (c = charset[i]) != 0; i++)
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charset[i] = tolower(c);
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}
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return 0;
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}
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static int handle_content_type(char *line)
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{
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*multipart_boundary = 0;
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if (slurp_attr(line, "boundary=", multipart_boundary + 2)) {
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memcpy(multipart_boundary, "--", 2);
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multipart_boundary_len = strlen(multipart_boundary);
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}
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slurp_attr(line, "charset=", charset);
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return 0;
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}
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static int handle_content_transfer_encoding(char *line)
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{
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if (strcasestr(line, "base64"))
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transfer_encoding = TE_BASE64;
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else if (strcasestr(line, "quoted-printable"))
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transfer_encoding = TE_QP;
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else
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transfer_encoding = TE_DONTCARE;
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return 0;
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}
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static int is_multipart_boundary(const char *line)
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{
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return (!memcmp(line, multipart_boundary, multipart_boundary_len));
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}
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static int eatspace(char *line)
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{
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int len = strlen(line);
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while (len > 0 && isspace(line[len-1]))
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line[--len] = 0;
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return len;
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}
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#define SEEN_FROM 01
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#define SEEN_DATE 02
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#define SEEN_SUBJECT 04
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/* First lines of body can have From:, Date:, and Subject: */
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static int handle_inbody_header(int *seen, char *line)
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{
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if (!memcmp("From:", line, 5) && isspace(line[5])) {
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if (!(*seen & SEEN_FROM) && handle_from(line+6)) {
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*seen |= SEEN_FROM;
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return 1;
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}
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}
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if (!memcmp("Date:", line, 5) && isspace(line[5])) {
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if (!(*seen & SEEN_DATE)) {
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handle_date(line+6);
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*seen |= SEEN_DATE;
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return 1;
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}
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}
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if (!memcmp("Subject:", line, 8) && isspace(line[8])) {
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if (!(*seen & SEEN_SUBJECT)) {
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handle_subject(line+9);
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*seen |= SEEN_SUBJECT;
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return 1;
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}
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}
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if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) {
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if (!(*seen & SEEN_SUBJECT)) {
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handle_subject(line);
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*seen |= SEEN_SUBJECT;
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return 1;
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}
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}
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return 0;
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}
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static char *cleanup_subject(char *subject)
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{
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if (keep_subject)
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return subject;
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for (;;) {
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char *p;
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int len, remove;
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switch (*subject) {
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case 'r': case 'R':
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if (!memcmp("e:", subject+1, 2)) {
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subject +=3;
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continue;
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}
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break;
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case ' ': case '\t': case ':':
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subject++;
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continue;
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case '[':
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p = strchr(subject, ']');
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if (!p) {
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subject++;
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continue;
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}
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len = strlen(p);
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remove = p - subject;
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if (remove <= len *2) {
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subject = p+1;
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continue;
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}
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break;
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}
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return subject;
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}
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}
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static void cleanup_space(char *buf)
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{
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unsigned char c;
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while ((c = *buf) != 0) {
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buf++;
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if (isspace(c)) {
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buf[-1] = ' ';
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c = *buf;
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while (isspace(c)) {
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int len = strlen(buf);
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memmove(buf, buf+1, len);
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c = *buf;
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}
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}
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}
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}
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typedef int (*header_fn_t)(char *);
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struct header_def {
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const char *name;
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header_fn_t func;
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int namelen;
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};
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static void check_header(char *line, int len, struct header_def *header)
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{
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int i;
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if (header[0].namelen <= 0) {
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for (i = 0; header[i].name; i++)
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header[i].namelen = strlen(header[i].name);
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}
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for (i = 0; header[i].name; i++) {
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int len = header[i].namelen;
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if (!strncasecmp(line, header[i].name, len) &&
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line[len] == ':' && isspace(line[len + 1])) {
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header[i].func(line + len + 2);
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break;
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}
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}
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}
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static void check_subheader_line(char *line, int len)
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{
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static struct header_def header[] = {
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{ "Content-Type", handle_subcontent_type },
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{ "Content-Transfer-Encoding",
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handle_content_transfer_encoding },
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{ NULL },
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};
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check_header(line, len, header);
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}
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static void check_header_line(char *line, int len)
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{
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static struct header_def header[] = {
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{ "From", handle_from },
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{ "Date", handle_date },
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{ "Subject", handle_subject },
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{ "Content-Type", handle_content_type },
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{ "Content-Transfer-Encoding",
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handle_content_transfer_encoding },
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{ NULL },
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};
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check_header(line, len, header);
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}
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static int read_one_header_line(char *line, int sz, FILE *in)
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{
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int ofs = 0;
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while (ofs < sz) {
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int peek, len;
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if (fgets(line + ofs, sz - ofs, in) == NULL)
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return ofs;
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len = eatspace(line + ofs);
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if (len == 0)
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return ofs;
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peek = fgetc(in); ungetc(peek, in);
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if (peek == ' ' || peek == '\t') {
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/* Yuck, 2822 header "folding" */
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ofs += len;
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continue;
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}
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return ofs + len;
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}
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return ofs;
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}
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static unsigned hexval(int c)
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{
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if (c >= '0' && c <= '9')
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return c - '0';
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if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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if (c >= 'A' && c <= 'F')
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return c - 'A' + 10;
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return ~0;
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}
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static int decode_q_segment(char *in, char *ot, char *ep)
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{
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int c;
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while ((c = *in++) != 0 && (in <= ep)) {
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if (c == '=') {
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int d = *in++;
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if (d == '\n' || !d)
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break; /* drop trailing newline */
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*ot++ = ((hexval(d) << 4) | hexval(*in++));
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}
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else
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*ot++ = c;
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}
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*ot = 0;
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return 0;
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}
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static int decode_b_segment(char *in, char *ot, char *ep)
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{
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/* Decode in..ep, possibly in-place to ot */
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int c, pos = 0, acc = 0;
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while ((c = *in++) != 0 && (in <= ep)) {
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if (c == '+')
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c = 62;
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else if (c == '/')
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c = 63;
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else if ('A' <= c && c <= 'Z')
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c -= 'A';
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else if ('a' <= c && c <= 'z')
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c -= 'a' - 26;
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else if ('0' <= c && c <= '9')
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c -= '0' - 52;
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else if (c == '=') {
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/* padding is almost like (c == 0), except we do
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* not output NUL resulting only from it;
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* for now we just trust the data.
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*/
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c = 0;
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}
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else
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continue; /* garbage */
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switch (pos++) {
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case 0:
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acc = (c << 2);
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break;
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case 1:
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*ot++ = (acc | (c >> 4));
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acc = (c & 15) << 4;
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break;
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case 2:
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*ot++ = (acc | (c >> 2));
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acc = (c & 3) << 6;
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break;
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case 3:
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*ot++ = (acc | c);
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acc = pos = 0;
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break;
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}
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}
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*ot = 0;
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return 0;
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}
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static void convert_to_utf8(char *line, char *charset)
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{
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if (*charset) {
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char *in, *out;
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size_t insize, outsize, nrc;
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char outbuf[4096]; /* cheat */
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iconv_t conv = iconv_open("utf-8", charset);
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if (conv == (iconv_t) -1) {
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fprintf(stderr, "cannot convert from %s to utf-8\n",
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charset);
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*charset = 0;
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return;
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}
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in = line;
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insize = strlen(in);
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out = outbuf;
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outsize = sizeof(outbuf);
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nrc = iconv(conv, &in, &insize, &out, &outsize);
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iconv_close(conv);
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if (nrc == (size_t) -1)
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return;
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*out = 0;
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strcpy(line, outbuf);
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}
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}
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static void decode_header_bq(char *it)
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{
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char *in, *out, *ep, *cp, *sp;
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char outbuf[1000];
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in = it;
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out = outbuf;
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while ((ep = strstr(in, "=?")) != NULL) {
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int sz, encoding;
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char charset_q[256], piecebuf[256];
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if (in != ep) {
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sz = ep - in;
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memcpy(out, in, sz);
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out += sz;
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in += sz;
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}
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/* E.g.
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* ep : "=?iso-2022-jp?B?GyR...?= foo"
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* ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz"
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*/
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ep += 2;
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cp = strchr(ep, '?');
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if (!cp)
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return; /* no munging */
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for (sp = ep; sp < cp; sp++)
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charset_q[sp - ep] = tolower(*sp);
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charset_q[cp - ep] = 0;
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encoding = cp[1];
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if (!encoding || cp[2] != '?')
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return; /* no munging */
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ep = strstr(cp + 3, "?=");
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if (!ep)
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return; /* no munging */
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switch (tolower(encoding)) {
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default:
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return; /* no munging */
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case 'b':
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sz = decode_b_segment(cp + 3, piecebuf, ep);
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break;
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case 'q':
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sz = decode_q_segment(cp + 3, piecebuf, ep);
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break;
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}
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if (sz < 0)
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return;
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if (metainfo_utf8)
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convert_to_utf8(piecebuf, charset_q);
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strcpy(out, piecebuf);
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out += strlen(out);
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in = ep + 2;
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}
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strcpy(out, in);
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strcpy(it, outbuf);
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}
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static void decode_transfer_encoding(char *line)
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{
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char *ep;
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switch (transfer_encoding) {
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case TE_QP:
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ep = line + strlen(line);
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decode_q_segment(line, line, ep);
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break;
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case TE_BASE64:
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ep = line + strlen(line);
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decode_b_segment(line, line, ep);
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break;
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case TE_DONTCARE:
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break;
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}
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}
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static void handle_info(void)
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{
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char *sub;
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static int done_info = 0;
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if (done_info)
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return;
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done_info = 1;
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sub = cleanup_subject(subject);
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cleanup_space(name);
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cleanup_space(date);
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cleanup_space(email);
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cleanup_space(sub);
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/* Unwrap inline B and Q encoding, and optionally
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* normalize the meta information to utf8.
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*/
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decode_header_bq(name);
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decode_header_bq(date);
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decode_header_bq(email);
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decode_header_bq(sub);
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printf("Author: %s\nEmail: %s\nSubject: %s\nDate: %s\n\n",
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name, email, sub, date);
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}
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|
|
/* We are inside message body and have read line[] already.
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* Spit out the commit log.
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*/
|
|
static int handle_commit_msg(void)
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|
{
|
|
if (!cmitmsg)
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|
return 0;
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do {
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|
if (!memcmp("diff -", line, 6) ||
|
|
!memcmp("---", line, 3) ||
|
|
!memcmp("Index: ", line, 7))
|
|
break;
|
|
if ((multipart_boundary[0] && is_multipart_boundary(line))) {
|
|
/* We come here when the first part had only
|
|
* the commit message without any patch. We
|
|
* pretend we have not seen this line yet, and
|
|
* go back to the loop.
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
/* Unwrap transfer encoding and optionally
|
|
* normalize the log message to UTF-8.
|
|
*/
|
|
decode_transfer_encoding(line);
|
|
if (metainfo_utf8)
|
|
convert_to_utf8(line, charset);
|
|
fputs(line, cmitmsg);
|
|
} while (fgets(line, sizeof(line), stdin) != NULL);
|
|
fclose(cmitmsg);
|
|
cmitmsg = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/* We have done the commit message and have the first
|
|
* line of the patch in line[].
|
|
*/
|
|
static void handle_patch(void)
|
|
{
|
|
do {
|
|
if (multipart_boundary[0] && is_multipart_boundary(line))
|
|
break;
|
|
/* Only unwrap transfer encoding but otherwise do not
|
|
* do anything. We do *NOT* want UTF-8 conversion
|
|
* here; we are dealing with the user payload.
|
|
*/
|
|
decode_transfer_encoding(line);
|
|
fputs(line, patchfile);
|
|
patch_lines++;
|
|
} while (fgets(line, sizeof(line), stdin) != NULL);
|
|
}
|
|
|
|
/* multipart boundary and transfer encoding are set up for us, and we
|
|
* are at the end of the sub header. do equivalent of handle_body up
|
|
* to the next boundary without closing patchfile --- we will expect
|
|
* that the first part to contain commit message and a patch, and
|
|
* handle other parts as pure patches.
|
|
*/
|
|
static int handle_multipart_one_part(void)
|
|
{
|
|
int seen = 0;
|
|
int n = 0;
|
|
int len;
|
|
|
|
while (fgets(line, sizeof(line), stdin) != NULL) {
|
|
again:
|
|
len = eatspace(line);
|
|
n++;
|
|
if (!len)
|
|
continue;
|
|
if (is_multipart_boundary(line))
|
|
break;
|
|
if (0 <= seen && handle_inbody_header(&seen, line))
|
|
continue;
|
|
seen = -1; /* no more inbody headers */
|
|
line[len] = '\n';
|
|
handle_info();
|
|
if (handle_commit_msg())
|
|
goto again;
|
|
handle_patch();
|
|
break;
|
|
}
|
|
if (n == 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static void handle_multipart_body(void)
|
|
{
|
|
int part_num = 0;
|
|
|
|
/* Skip up to the first boundary */
|
|
while (fgets(line, sizeof(line), stdin) != NULL)
|
|
if (is_multipart_boundary(line)) {
|
|
part_num = 1;
|
|
break;
|
|
}
|
|
if (!part_num)
|
|
return;
|
|
/* We are on boundary line. Start slurping the subhead. */
|
|
while (1) {
|
|
int len = read_one_header_line(line, sizeof(line), stdin);
|
|
if (!len) {
|
|
if (handle_multipart_one_part() < 0)
|
|
return;
|
|
}
|
|
else
|
|
check_subheader_line(line, len);
|
|
}
|
|
fclose(patchfile);
|
|
if (!patch_lines) {
|
|
fprintf(stderr, "No patch found\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/* Non multipart message */
|
|
static void handle_body(void)
|
|
{
|
|
int seen = 0;
|
|
|
|
while (fgets(line, sizeof(line), stdin) != NULL) {
|
|
int len = eatspace(line);
|
|
if (!len)
|
|
continue;
|
|
if (0 <= seen && handle_inbody_header(&seen, line))
|
|
continue;
|
|
seen = -1; /* no more inbody headers */
|
|
line[len] = '\n';
|
|
handle_info();
|
|
handle_commit_msg();
|
|
handle_patch();
|
|
break;
|
|
}
|
|
fclose(patchfile);
|
|
if (!patch_lines) {
|
|
fprintf(stderr, "No patch found\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static const char mailinfo_usage[] =
|
|
"git-mailinfo [-k] [-u] msg patch <mail >info";
|
|
|
|
static void usage(void) {
|
|
fprintf(stderr, "%s\n", mailinfo_usage);
|
|
exit(1);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
while (1 < argc && argv[1][0] == '-') {
|
|
if (!strcmp(argv[1], "-k"))
|
|
keep_subject = 1;
|
|
else if (!strcmp(argv[1], "-u"))
|
|
metainfo_utf8 = 1;
|
|
else
|
|
usage();
|
|
argc--; argv++;
|
|
}
|
|
|
|
if (argc != 3)
|
|
usage();
|
|
cmitmsg = fopen(argv[1], "w");
|
|
if (!cmitmsg) {
|
|
perror(argv[1]);
|
|
exit(1);
|
|
}
|
|
patchfile = fopen(argv[2], "w");
|
|
if (!patchfile) {
|
|
perror(argv[2]);
|
|
exit(1);
|
|
}
|
|
while (1) {
|
|
int len = read_one_header_line(line, sizeof(line), stdin);
|
|
if (!len) {
|
|
if (multipart_boundary[0])
|
|
handle_multipart_body();
|
|
else
|
|
handle_body();
|
|
break;
|
|
}
|
|
check_header_line(line, len);
|
|
}
|
|
return 0;
|
|
}
|