From 5e8617f560968567c285bc2e9b0674f8f9d535cb Mon Sep 17 00:00:00 2001 From: Thomas Rast Date: Wed, 22 Feb 2012 20:34:22 +0100 Subject: bundle: put strbuf_readline_fd in strbuf.c with adjustments The comment even said that it should eventually go there. While at it, match the calling convention and name of the function to the strbuf_get*line family. So it now is strbuf_getwholeline_fd. Signed-off-by: Thomas Rast Signed-off-by: Junio C Hamano --- bundle.c | 21 ++------------------- 1 file changed, 2 insertions(+), 19 deletions(-) (limited to 'bundle.c') diff --git a/bundle.c b/bundle.c index 8a1d53ba2..0542093ee 100644 --- a/bundle.c +++ b/bundle.c @@ -23,23 +23,6 @@ static void add_to_ref_list(const unsigned char *sha1, const char *name, list->nr++; } -/* Eventually this should go to strbuf.[ch] */ -static int strbuf_readline_fd(struct strbuf *sb, int fd) -{ - strbuf_reset(sb); - - while (1) { - char ch; - ssize_t len = xread(fd, &ch, 1); - if (len <= 0) - return len; - strbuf_addch(sb, ch); - if (ch == '\n') - break; - } - return 0; -} - static int parse_bundle_header(int fd, struct bundle_header *header, const char *report_path) { @@ -47,7 +30,7 @@ static int parse_bundle_header(int fd, struct bundle_header *header, int status = 0; /* The bundle header begins with the signature */ - if (strbuf_readline_fd(&buf, fd) || + if (strbuf_getwholeline_fd(&buf, fd, '\n') || strcmp(buf.buf, bundle_signature)) { if (report_path) error("'%s' does not look like a v2 bundle file", @@ -57,7 +40,7 @@ static int parse_bundle_header(int fd, struct bundle_header *header, } /* The bundle header ends with an empty line */ - while (!strbuf_readline_fd(&buf, fd) && + while (!strbuf_getwholeline_fd(&buf, fd, '\n') && buf.len && buf.buf[0] != '\n') { unsigned char sha1[20]; int is_prereq = 0; -- cgit v1.2.1 From bc2fed496baa54ae99dede7da23dec938adbf0eb Mon Sep 17 00:00:00 2001 From: Thomas Rast Date: Wed, 22 Feb 2012 20:34:23 +0100 Subject: bundle: use a strbuf to scan the log for boundary commits The first part of the bundle header contains the boundary commits, and could be approximated by # v2 git bundle $(git rev-list --pretty=oneline --boundary | grep ^-) git-bundle actually spawns exactly this rev-list invocation, and does the grepping internally. There was a subtle bug in the latter step: it used fgets() with a 1024-byte buffer. If the user has sufficiently long subjects (e.g., by not adhering to the git oneline-subject convention in the first place), the 'oneline' format can easily overflow the buffer. fgets() then returns the rest of the line in the next call(s). If one of these remaining parts started with '-', git-bundle would mistakenly insert it into the bundle thinking it was a boundary commit. Fix it by using strbuf_getwholeline() instead, which handles arbitrary line lengths correctly. Note that on the receiving side in parse_bundle_header() we were already using strbuf_getwholeline_fd(), so that part is safe. Reported-by: Jannis Pohlmann Signed-off-by: Thomas Rast Signed-off-by: Junio C Hamano --- bundle.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'bundle.c') diff --git a/bundle.c b/bundle.c index 0542093ee..4497343e5 100644 --- a/bundle.c +++ b/bundle.c @@ -234,7 +234,7 @@ int create_bundle(struct bundle_header *header, const char *path, const char **argv_boundary = xmalloc((argc + 4) * sizeof(const char *)); const char **argv_pack = xmalloc(6 * sizeof(const char *)); int i, ref_count = 0; - char buffer[1024]; + struct strbuf buf = STRBUF_INIT; struct rev_info revs; struct child_process rls; FILE *rls_fout; @@ -266,20 +266,21 @@ int create_bundle(struct bundle_header *header, const char *path, if (start_command(&rls)) return -1; rls_fout = xfdopen(rls.out, "r"); - while (fgets(buffer, sizeof(buffer), rls_fout)) { + while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) { unsigned char sha1[20]; - if (buffer[0] == '-') { - write_or_die(bundle_fd, buffer, strlen(buffer)); - if (!get_sha1_hex(buffer + 1, sha1)) { + if (buf.len > 0 && buf.buf[0] == '-') { + write_or_die(bundle_fd, buf.buf, buf.len); + if (!get_sha1_hex(buf.buf + 1, sha1)) { struct object *object = parse_object(sha1); object->flags |= UNINTERESTING; - add_pending_object(&revs, object, buffer); + add_pending_object(&revs, object, buf.buf); } - } else if (!get_sha1_hex(buffer, sha1)) { + } else if (!get_sha1_hex(buf.buf, sha1)) { struct object *object = parse_object(sha1); object->flags |= SHOWN; } } + strbuf_release(&buf); fclose(rls_fout); if (finish_command(&rls)) return error("rev-list died"); -- cgit v1.2.1