Re: [PATCH/RFC 5/7] imap-send: provide fall-back random-source
On Fri, Oct 09, 2009 at 01:16:50AM +0200, Erik Faye-Lund wrote:
Show 14 quoted lines
> > And here is a patch (on top of the earlier one) to do that.
>
> Alright, so I'm spinning a new version of this series, and I'm
> wondering a bit how to include patches like these, where there's no
> commit message (because it was a sketch or something, I guess) or
> sign-off. Should I send the commit-messages to the author and have the
> him/her sign off on them, or should I set me as author and credit the
> real author for the actual work in the commit message? I see the
> latter have been done quite a bit in git.git already. The benefit of
> the first one is of course that authorship is retained, but the
> backside is that it incorrectly looks like the author wrote the commit
> message.
>
> Are there any preferences?
Usually a "something like this" patch means it is not very well tested, and that was certainly the case here (I don't even used imap-send). But if somebody else (like you) concurs that it is the sane thing to do and has tested or run with it for a while, then maybe it is time to promote it.
As for how to do that, both of your proposed solutions happen in practice. Usually I would only mark myself as author if I picked up somebody's "how about this" and tweaked it significantly or added something to it. If you write the commit message, or add tests, or whatever, then usually it is a good idea to just say so in the commit message.
But when in doubt, ask the original author what they want to do. In this case, I think it is best for me to write the message, as I did a fair bit of looking into the reasons for this code.
So here goes. It's still only lightly tested by me, but we have no test scripts at all for imap-send. I suspect getting it into 'next' is the best way to actually get it tested.
-- >8 --
Subject: [PATCH] imap-send: remove useless uid code
The imap-send code is based on code from isync, a program for syncing imap mailboxes. Because of this, it has inherited some code that makes sense for isync, but not for imap-send.
In particular, when storing a message, it does one of:
- if the server supports it, note the server-assigned
unique identifier (UID) given to each message - otherwise, assigned a random UID and store it in the
message header as X-TUIDPresumably this is used in isync to be able to synchronize mailstores multiple times without duplication. But for imap-send, it the values are useless; we never do anything with them and simply forget them at the end of the program.
This patch removes the useless code. Not only is it nice for maintainability to get rid of dead code, but the removed code relied on the existence of /dev/urandom, which made it a portability problem for non-Unix platforms.
Signed-off-by: Jeff King <peff@peff.net>
---
As you may be able to tell from the commit message, this is both of the
patches rolled into one. I could probably rip out even more, but it's
not really worth the time. This one solves the portability issue.
imap-send.c | 155 ++++------------------------------------------------------
1 files changed, 11 insertions(+), 144 deletions(-)
Show changes to imap-send.c +11 −144
diff --git a/imap-send.c b/imap-send.c
index 3847fd1..8da7a94 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -123,9 +123,6 @@ static int nfvasprintf(char **strp, const char *fmt, va_list ap)
return len;
}
-static void arc4_init(void);
-static unsigned char arc4_getbyte(void);
-
struct imap_server_conf {
char *name;
char *tunnel;
@@ -489,52 +486,6 @@ static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
return ret;
}
-static struct {
- unsigned char i, j, s[256];
-} rs;
-
-static void arc4_init(void)
-{
- int i, fd;
- unsigned char j, si, dat[128];
-
- if ((fd = open("/dev/urandom", O_RDONLY)) < 0 && (fd = open("/dev/random", O_RDONLY)) < 0) {
- fprintf(stderr, "Fatal: no random number source available.\n");
- exit(3);
- }
- if (read_in_full(fd, dat, 128) != 128) {
- fprintf(stderr, "Fatal: cannot read random number source.\n");
- exit(3);
- }
- close(fd);
-
- for (i = 0; i < 256; i++)
- rs.s[i] = i;
- for (i = j = 0; i < 256; i++) {
- si = rs.s[i];
- j += si + dat[i & 127];
- rs.s[i] = rs.s[j];
- rs.s[j] = si;
- }
- rs.i = rs.j = 0;
-
- for (i = 0; i < 256; i++)
- arc4_getbyte();
-}
-
-static unsigned char arc4_getbyte(void)
-{
- unsigned char si, sj;
-
- rs.i++;
- si = rs.s[rs.i];
- rs.j += si;
- sj = rs.s[rs.j];
- rs.s[rs.i] = sj;
- rs.s[rs.j] = si;
- return rs.s[(si + sj) & 0xff];
-}
-
static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
struct imap_cmd_cb *cb,
const char *fmt, va_list ap)
@@ -1198,88 +1149,20 @@ static int imap_make_flags(int flags, char *buf)
return d;
}
-#define TUIDL 8
-
-static int imap_store_msg(struct store *gctx, struct msg_data *data, int *uid)
+static int imap_store_msg(struct store *gctx, struct msg_data *data)
{
struct imap_store *ctx = (struct imap_store *)gctx;
struct imap *imap = ctx->imap;
struct imap_cmd_cb cb;
- char *fmap, *buf;
const char *prefix, *box;
- int ret, i, j, d, len, extra, nocr;
- int start, sbreak = 0, ebreak = 0;
- char flagstr[128], tuid[TUIDL * 2 + 1];
+ int ret, d;
+ char flagstr[128];
memset(&cb, 0, sizeof(cb));
- fmap = data->data;
- len = data->len;
- nocr = !data->crlf;
- extra = 0, i = 0;
- if (!CAP(UIDPLUS) && uid) {
- nloop:
- start = i;
- while (i < len)
- if (fmap[i++] == '\n') {
- extra += nocr;
- if (i - 2 + nocr == start) {
- sbreak = ebreak = i - 2 + nocr;
- goto mktid;
- }
- if (!memcmp(fmap + start, "X-TUID: ", 8)) {
- extra -= (ebreak = i) - (sbreak = start) + nocr;
- goto mktid;
- }
- goto nloop;
- }
- /* invalid message */
- free(fmap);
- return DRV_MSG_BAD;
- mktid:
- for (j = 0; j < TUIDL; j++)
- sprintf(tuid + j * 2, "%02x", arc4_getbyte());
- extra += 8 + TUIDL * 2 + 2;
- }
- if (nocr)
- for (; i < len; i++)
- if (fmap[i] == '\n')
- extra++;
-
- cb.dlen = len + extra;
- buf = cb.data = xmalloc(cb.dlen);
- i = 0;
- if (!CAP(UIDPLUS) && uid) {
- if (nocr) {
- for (; i < sbreak; i++)
- if (fmap[i] == '\n') {
- *buf++ = '\r';
- *buf++ = '\n';
- } else
- *buf++ = fmap[i];
- } else {
- memcpy(buf, fmap, sbreak);
- buf += sbreak;
- }
- memcpy(buf, "X-TUID: ", 8);
- buf += 8;
- memcpy(buf, tuid, TUIDL * 2);
- buf += TUIDL * 2;
- *buf++ = '\r';
- *buf++ = '\n';
- i = ebreak;
- }
- if (nocr) {
- for (; i < len; i++)
- if (fmap[i] == '\n') {
- *buf++ = '\r';
- *buf++ = '\n';
- } else
- *buf++ = fmap[i];
- } else
- memcpy(buf, fmap + i, len - i);
-
- free(fmap);
+ cb.dlen = data->len;
+ cb.data = xmalloc(cb.dlen);
+ memcpy(cb.data, data->data, data->len);
d = 0;
if (data->flags) {
@@ -1288,26 +1171,14 @@ static int imap_store_msg(struct store *gctx, struct msg_data *data, int *uid)
}
flagstr[d] = 0;
- if (!uid) {
- box = gctx->conf->trash;
- prefix = ctx->prefix;
- cb.create = 1;
- if (ctx->trashnc)
- imap->caps = imap->rcaps & ~(1 << LITERALPLUS);
- } else {
- box = gctx->name;
- prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
- cb.create = 0;
- }
- cb.ctx = uid;
+ box = gctx->name;
+ prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
+ cb.create = 0;
ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
imap->caps = imap->rcaps;
if (ret != DRV_OK)
return ret;
- if (!uid)
- ctx->trashnc = 0;
- else
- gctx->count++;
+ gctx->count++;
return DRV_OK;
}
@@ -1483,7 +1354,6 @@ int main(int argc, char **argv)
{
struct msg_data all_msgs, msg;
struct store *ctx = NULL;
- int uid = 0;
int ofs = 0;
int r;
int total, n = 0;
@@ -1491,9 +1361,6 @@ int main(int argc, char **argv)
git_extract_argv0_path(argv[0]);
- /* init the random number generator */
- arc4_init();
-
setup_git_directory_gently(&nongit_ok);
git_config(git_imap_config, NULL);
@@ -1540,7 +1407,7 @@ int main(int argc, char **argv)
break;
if (server.use_html)
wrap_in_html(&msg);
- r = imap_store_msg(ctx, &msg, &uid);
+ r = imap_store_msg(ctx, &msg);
if (r != DRV_OK)
break;
n++;
--
1.6.5.rc3.206.g63d9c
Erik Faye-Lund
