File: [local] / src / usr.bin / cvs / Attic / proto.c (download)
Revision 1.16, Mon Aug 2 17:16:08 2004 UTC (19 years, 10 months ago) by jfb
Branch: MAIN
Changes since 1.15: +58 -4 lines
* copy most of the code from cvs_resp_handle() into cvs_req_handle()
and add some protection for unimplemented handlers
* add a bogus handler for the `Template' response, which we'll handle
soon
|
/* $OpenBSD: proto.c,v 1.16 2004/08/02 17:16:08 jfb Exp $ */
/*
* Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* CVS client/server protocol
* ==========================
*
* The following code implements the CVS client/server protocol, which is
* documented at the following URL:
* http://www.loria.fr/~molli/cvs/doc/cvsclient_toc.html
*
* The protocol is split up into two parts; the first part is the client side
* of things and is composed of all the response handlers, which are all named
* with a prefix of "cvs_resp_". The second part is the set of request
* handlers used by the server. These handlers process the request and
* generate the appropriate response to send back. The prefix for request
* handlers is "cvs_req_".
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <sysexits.h>
#ifdef CVS_ZLIB
#include <zlib.h>
#endif
#include "buf.h"
#include "cvs.h"
#include "log.h"
#include "file.h"
#include "proto.h"
#define CVS_MTSTK_MAXDEPTH 16
/* request flags */
#define CVS_REQF_RESP 0x01
extern int verbosity;
extern int cvs_compress;
extern char *cvs_rsh;
extern int cvs_trace;
extern int cvs_nolog;
extern int cvs_readonly;
static int cvs_resp_validreq (struct cvsroot *, int, char *);
static int cvs_resp_cksum (struct cvsroot *, int, char *);
static int cvs_resp_modtime (struct cvsroot *, int, char *);
static int cvs_resp_m (struct cvsroot *, int, char *);
static int cvs_resp_ok (struct cvsroot *, int, char *);
static int cvs_resp_error (struct cvsroot *, int, char *);
static int cvs_resp_statdir (struct cvsroot *, int, char *);
static int cvs_resp_sticky (struct cvsroot *, int, char *);
static int cvs_resp_newentry (struct cvsroot *, int, char *);
static int cvs_resp_updated (struct cvsroot *, int, char *);
static int cvs_resp_removed (struct cvsroot *, int, char *);
static int cvs_resp_mode (struct cvsroot *, int, char *);
static int cvs_resp_modxpand (struct cvsroot *, int, char *);
static int cvs_resp_rcsdiff (struct cvsroot *, int, char *);
static int cvs_resp_template (struct cvsroot *, int, char *);
static int cvs_initlog (void);
static const char *cvs_months[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
struct cvs_req {
int req_id;
char req_str[32];
u_int req_flags;
int (*req_hdlr)(int, char *);
} cvs_requests[] = {
{ CVS_REQ_DIRECTORY, "Directory", 0, NULL },
{ CVS_REQ_MAXDOTDOT, "Max-dotdot", 0, NULL },
{ CVS_REQ_STATICDIR, "Static-directory", 0, NULL },
{ CVS_REQ_STICKY, "Sticky", 0, NULL },
{ CVS_REQ_ENTRY, "Entry", 0, NULL },
{ CVS_REQ_ENTRYEXTRA, "EntryExtra", 0, NULL },
{ CVS_REQ_CHECKINTIME, "Checkin-time", 0, NULL },
{ CVS_REQ_MODIFIED, "Modified", 0, NULL },
{ CVS_REQ_ISMODIFIED, "Is-modified", 0, NULL },
{ CVS_REQ_UNCHANGED, "Unchanged", 0, NULL },
{ CVS_REQ_USEUNCHANGED, "UseUnchanged", 0, NULL },
{ CVS_REQ_NOTIFY, "Notify", 0, NULL },
{ CVS_REQ_NOTIFYUSER, "NotifyUser", 0, NULL },
{ CVS_REQ_QUESTIONABLE, "Questionable", 0, NULL },
{ CVS_REQ_CASE, "Case", 0, NULL },
{ CVS_REQ_UTF8, "Utf8", 0, NULL },
{ CVS_REQ_ARGUMENT, "Argument", 0, NULL },
{ CVS_REQ_ARGUMENTX, "Argumentx", 0, NULL },
{ CVS_REQ_GLOBALOPT, "Global_option", 0, NULL },
{ CVS_REQ_GZIPSTREAM, "Gzip-stream", 0, NULL },
{ CVS_REQ_READCVSRC2, "read-cvsrc2", 0, NULL },
{ CVS_REQ_READWRAP, "read-cvswrappers", 0, NULL },
{ CVS_REQ_READIGNORE, "read-cvsignore", 0, NULL },
{ CVS_REQ_ERRIFREADER, "Error-If-Reader", 0, NULL },
{ CVS_REQ_VALIDRCSOPT, "Valid-RcsOptions", 0, NULL },
{ CVS_REQ_SET, "Set", 0, NULL },
{ CVS_REQ_XPANDMOD, "expand-modules", CVS_REQF_RESP, NULL },
{ CVS_REQ_LOG, "log", 0, NULL },
{ CVS_REQ_CO, "co", CVS_REQF_RESP, NULL },
{ CVS_REQ_EXPORT, "export", CVS_REQF_RESP, NULL },
{ CVS_REQ_RANNOTATE, "rannotate", 0, NULL },
{ CVS_REQ_RDIFF, "rdiff", 0, NULL },
{ CVS_REQ_RLOG, "rlog", 0, NULL },
{ CVS_REQ_RTAG, "rtag", CVS_REQF_RESP, NULL },
{ CVS_REQ_INIT, "init", CVS_REQF_RESP, NULL },
{ CVS_REQ_STATUS, "status", CVS_REQF_RESP, NULL },
{ CVS_REQ_UPDATE, "update", CVS_REQF_RESP, NULL },
{ CVS_REQ_HISTORY, "history", 0, NULL },
{ CVS_REQ_IMPORT, "import", CVS_REQF_RESP, NULL },
{ CVS_REQ_ADD, "add", CVS_REQF_RESP, NULL },
{ CVS_REQ_REMOVE, "remove", CVS_REQF_RESP, NULL },
{ CVS_REQ_RELEASE, "release", CVS_REQF_RESP, NULL },
{ CVS_REQ_ROOT, "Root", 0, NULL },
{ CVS_REQ_VALIDRESP, "Valid-responses", 0, NULL },
{ CVS_REQ_VALIDREQ, "valid-requests", CVS_REQF_RESP, NULL },
{ CVS_REQ_VERSION, "version", CVS_REQF_RESP, NULL },
{ CVS_REQ_NOOP, "noop", CVS_REQF_RESP, NULL },
{ CVS_REQ_DIFF, "diff", CVS_REQF_RESP, NULL },
};
struct cvs_resp {
u_int resp_id;
char resp_str[32];
int (*resp_hdlr)(struct cvsroot *, int, char *);
} cvs_responses[] = {
{ CVS_RESP_OK, "ok", cvs_resp_ok },
{ CVS_RESP_ERROR, "error", cvs_resp_error },
{ CVS_RESP_VALIDREQ, "Valid-requests", cvs_resp_validreq },
{ CVS_RESP_M, "M", cvs_resp_m },
{ CVS_RESP_MBINARY, "Mbinary", cvs_resp_m },
{ CVS_RESP_MT, "MT", cvs_resp_m },
{ CVS_RESP_E, "E", cvs_resp_m },
{ CVS_RESP_F, "F", cvs_resp_m },
{ CVS_RESP_CREATED, "Created", cvs_resp_updated },
{ CVS_RESP_UPDATED, "Updated", cvs_resp_updated },
{ CVS_RESP_UPDEXIST, "Update-existing", cvs_resp_updated },
{ CVS_RESP_MERGED, "Merged", cvs_resp_updated },
{ CVS_RESP_REMOVED, "Removed", cvs_resp_removed },
{ CVS_RESP_CKSUM, "Checksum", cvs_resp_cksum },
{ CVS_RESP_CLRSTATDIR, "Clear-static-directory", cvs_resp_statdir },
{ CVS_RESP_SETSTATDIR, "Set-static-directory", cvs_resp_statdir },
{ CVS_RESP_NEWENTRY, "New-entry", cvs_resp_newentry },
{ CVS_RESP_CHECKEDIN, "Checked-in", cvs_resp_newentry },
{ CVS_RESP_MODE, "Mode", cvs_resp_mode },
{ CVS_RESP_MODTIME, "Mod-time", cvs_resp_modtime },
{ CVS_RESP_MODXPAND, "Module-expansion", cvs_resp_modxpand },
{ CVS_RESP_SETSTICKY, "Set-sticky", cvs_resp_sticky },
{ CVS_RESP_CLRSTICKY, "Clear-sticky", cvs_resp_sticky },
{ CVS_RESP_RCSDIFF, "Rcs-diff", cvs_resp_rcsdiff },
{ CVS_RESP_TEMPLATE, "Template", cvs_resp_template },
};
static char *cvs_mt_stack[CVS_MTSTK_MAXDEPTH];
static u_int cvs_mtstk_depth = 0;
static time_t cvs_modtime = 0;
#define CVS_NBREQ (sizeof(cvs_requests)/sizeof(cvs_requests[0]))
#define CVS_NBRESP (sizeof(cvs_responses)/sizeof(cvs_responses[0]))
/* mask of requets supported by server */
static u_char cvs_server_validreq[CVS_REQ_MAX + 1];
char *cvs_fcksum = NULL;
mode_t cvs_lastmode = 0;
static char cvs_proto_buf[4096];
/*
* Output files for protocol logging when the CVS_CLIENT_LOG enviroment
* variable is set.
*/
static int cvs_server_logon = 0;
static FILE *cvs_server_inlog = NULL;
static FILE *cvs_server_outlog = NULL;
/*
* cvs_connect()
*
* Open a client connection to the cvs server whose address is given in
* the <root> variable. The method used to connect depends on the
* setting of the CVS_RSH variable.
* Returns 0 on success, or -1 on failure.
*/
int
cvs_connect(struct cvsroot *root)
{
int argc, infd[2], outfd[2];
pid_t pid;
char *argv[16], *cvs_server_cmd, *vresp;
if (pipe(infd) == -1) {
cvs_log(LP_ERRNO,
"failed to create input pipe for client connection");
return (-1);
}
if (pipe(outfd) == -1) {
cvs_log(LP_ERRNO,
"failed to create output pipe for client connection");
(void)close(infd[0]);
(void)close(infd[1]);
return (-1);
}
pid = fork();
if (pid == -1) {
cvs_log(LP_ERRNO, "failed to fork for cvs server connection");
return (-1);
}
if (pid == 0) {
if ((dup2(infd[0], STDIN_FILENO) == -1) ||
(dup2(outfd[1], STDOUT_FILENO) == -1)) {
cvs_log(LP_ERRNO,
"failed to setup standard streams for cvs server");
return (-1);
}
(void)close(infd[1]);
(void)close(outfd[0]);
argc = 0;
argv[argc++] = cvs_rsh;
if (root->cr_user != NULL) {
argv[argc++] = "-l";
argv[argc++] = root->cr_user;
}
cvs_server_cmd = getenv("CVS_SERVER");
if (cvs_server_cmd == NULL)
cvs_server_cmd = "cvs";
argv[argc++] = root->cr_host;
argv[argc++] = cvs_server_cmd;
argv[argc++] = "server";
argv[argc] = NULL;
execvp(argv[0], argv);
cvs_log(LP_ERRNO, "failed to exec");
exit(EX_OSERR);
}
/* we are the parent */
(void)close(infd[0]);
(void)close(outfd[1]);
root->cr_srvin = fdopen(infd[1], "w");
if (root->cr_srvin == NULL) {
cvs_log(LP_ERRNO, "failed to create pipe stream");
return (-1);
}
root->cr_srvout = fdopen(outfd[0], "r");
if (root->cr_srvout == NULL) {
cvs_log(LP_ERRNO, "failed to create pipe stream");
return (-1);
}
/* make the streams line-buffered */
(void)setvbuf(root->cr_srvin, NULL, _IOLBF, 0);
(void)setvbuf(root->cr_srvout, NULL, _IOLBF, 0);
cvs_initlog();
/*
* Send the server the list of valid responses, then ask for valid
* requests.
*/
vresp = cvs_resp_getvalid();
if (vresp == NULL) {
cvs_log(LP_ERR, "can't generate list of valid responses");
return (-1);
}
if (cvs_sendreq(root, CVS_REQ_VALIDRESP, vresp) < 0) {
}
free(vresp);
if (cvs_sendreq(root, CVS_REQ_VALIDREQ, NULL) < 0) {
cvs_log(LP_ERR, "failed to get valid requests from server");
return (-1);
}
/* now share our global options with the server */
if (verbosity == 1)
cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-q");
else if (verbosity == 0)
cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-Q");
if (cvs_nolog)
cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-l");
if (cvs_readonly)
cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-r");
if (cvs_trace)
cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-t");
/* now send the CVSROOT to the server */
if (cvs_sendreq(root, CVS_REQ_ROOT, root->cr_dir) < 0)
return (-1);
/* not sure why, but we have to send this */
if (cvs_sendreq(root, CVS_REQ_USEUNCHANGED, NULL) < 0)
return (-1);
#ifdef CVS_ZLIB
/* if compression was requested, initialize it */
#endif
cvs_log(LP_DEBUG, "connected to %s", root->cr_host);
return (0);
}
/*
* cvs_disconnect()
*
* Disconnect from the cvs server.
*/
void
cvs_disconnect(struct cvsroot *root)
{
cvs_log(LP_DEBUG, "closing connection to %s", root->cr_host);
if (root->cr_srvin != NULL) {
(void)fclose(root->cr_srvin);
root->cr_srvin = NULL;
}
if (root->cr_srvout != NULL) {
(void)fclose(root->cr_srvout);
root->cr_srvout = NULL;
}
}
/*
* cvs_req_getbyid()
*
*/
struct cvs_req*
cvs_req_getbyid(int reqid)
{
u_int i;
for (i = 0; i < CVS_NBREQ; i++)
if (cvs_requests[i].req_id == reqid)
return &(cvs_requests[i]);
return (NULL);
}
/*
* cvs_req_getbyname()
*/
struct cvs_req*
cvs_req_getbyname(const char *rname)
{
u_int i;
for (i = 0; i < CVS_NBREQ; i++)
if (strcmp(cvs_requests[i].req_str, rname) == 0)
return &(cvs_requests[i]);
return (NULL);
}
/*
* cvs_req_getvalid()
*
* Build a space-separated list of all the requests that this protocol
* implementation supports.
*/
char*
cvs_req_getvalid(void)
{
u_int i;
size_t len;
char *vrstr;
BUF *buf;
buf = cvs_buf_alloc(512, BUF_AUTOEXT);
if (buf == NULL)
return (NULL);
cvs_buf_set(buf, cvs_requests[0].req_str,
strlen(cvs_requests[0].req_str), 0);
for (i = 1; i < CVS_NBREQ; i++) {
if ((cvs_buf_putc(buf, ' ') < 0) ||
(cvs_buf_append(buf, cvs_requests[i].req_str,
strlen(cvs_requests[i].req_str)) < 0)) {
cvs_buf_free(buf);
return (NULL);
}
}
/* NUL-terminate */
if (cvs_buf_putc(buf, '\0') < 0) {
cvs_buf_free(buf);
return (NULL);
}
len = cvs_buf_size(buf);
vrstr = (char *)malloc(len);
cvs_buf_copy(buf, 0, vrstr, len);
cvs_buf_free(buf);
return (vrstr);
}
/*
* cvs_req_handle()
*
* Generic request handler dispatcher.
*/
int
cvs_req_handle(char *line)
{
u_int i;
char *cp, *cmd;
cmd = line;
cp = strchr(cmd, ' ');
if (cp != NULL)
*(cp++) = '\0';
for (i = 0; i < CVS_NBREQ; i++) {
if (strcmp(cvs_requests[i].req_str, cmd) == 0) {
if (cvs_requests[i].req_hdlr == NULL) {
cvs_log(LP_ERR,
"unimplemented request handler for `%s'",
cmd);
break;
}
else
return (*cvs_requests[i].req_hdlr)
(cvs_requests[i].req_id, cp);
}
}
/* unhandled */
return (-1);
}
/*
* cvs_resp_getbyid()
*
*/
struct cvs_resp*
cvs_resp_getbyid(int respid)
{
u_int i;
for (i = 0; i < CVS_NBREQ; i++)
if (cvs_responses[i].resp_id == (u_int)respid)
return &(cvs_responses[i]);
return (NULL);
}
/*
* cvs_resp_getbyname()
*/
struct cvs_resp*
cvs_resp_getbyname(const char *rname)
{
u_int i;
for (i = 0; i < CVS_NBREQ; i++)
if (strcmp(cvs_responses[i].resp_str, rname) == 0)
return &(cvs_responses[i]);
return (NULL);
}
/*
* cvs_resp_getvalid()
*
* Build a space-separated list of all the responses that this protocol
* implementation supports.
*/
char*
cvs_resp_getvalid(void)
{
u_int i;
size_t len;
char *vrstr;
BUF *buf;
buf = cvs_buf_alloc(512, BUF_AUTOEXT);
if (buf == NULL)
return (NULL);
cvs_buf_set(buf, cvs_responses[0].resp_str,
strlen(cvs_responses[0].resp_str), 0);
for (i = 1; i < CVS_NBRESP; i++) {
if ((cvs_buf_putc(buf, ' ') < 0) ||
(cvs_buf_append(buf, cvs_responses[i].resp_str,
strlen(cvs_responses[i].resp_str)) < 0)) {
cvs_buf_free(buf);
return (NULL);
}
}
/* NUL-terminate */
if (cvs_buf_putc(buf, '\0') < 0) {
cvs_buf_free(buf);
return (NULL);
}
len = cvs_buf_size(buf);
vrstr = (char *)malloc(len);
cvs_buf_copy(buf, 0, vrstr, len);
cvs_buf_free(buf);
return (vrstr);
}
/*
* cvs_resp_handle()
*
* Generic response handler dispatcher. The handler expects the first line
* of the command as single argument.
* Returns the return value of the command on success, or -1 on failure.
*/
int
cvs_resp_handle(struct cvsroot *root, char *line)
{
u_int i;
char *cp, *cmd;
cmd = line;
cp = strchr(cmd, ' ');
if (cp != NULL)
*(cp++) = '\0';
for (i = 0; i < CVS_NBRESP; i++) {
if (strcmp(cvs_responses[i].resp_str, cmd) == 0) {
if (cvs_responses[i].resp_hdlr == NULL) {
cvs_log(LP_ERRNO,
"unimplemented response handler for `%s'",
cmd);
return (-1);
}
else
return (*cvs_responses[i].resp_hdlr)
(root, cvs_responses[i].resp_id, cp);
}
}
/* unhandled */
return (-1);
}
/*
* cvs_resp_validreq()
*
* Handler for the `Valid-requests' response. The list of valid requests is
* split on spaces and each request's entry in the valid request array is set
* to 1 to indicate the validity.
* Returns 0 on success, or -1 on failure.
*/
static int
cvs_resp_validreq(struct cvsroot *root, int type, char *line)
{
char *sp, *ep;
struct cvs_req *req;
/* parse the requests */
sp = line;
do {
ep = strchr(sp, ' ');
if (ep != NULL)
*ep = '\0';
req = cvs_req_getbyname(sp);
if (req != NULL)
cvs_server_validreq[req->req_id] = 1;
if (ep != NULL)
sp = ep + 1;
} while (ep != NULL);
return (0);
}
/*
* cvs_resp_m()
*
* Handler for the `M', 'MT', `F' and `E' responses.
*/
static int
cvs_resp_m(struct cvsroot *root, int type, char *line)
{
char *cp;
FILE *stream;
stream = NULL;
switch (type) {
case CVS_RESP_F:
fflush(stderr);
return (0);
case CVS_RESP_M:
stream = stdout;
break;
case CVS_RESP_E:
stream = stderr;
break;
case CVS_RESP_MT:
if (*line == '+') {
if (cvs_mtstk_depth == CVS_MTSTK_MAXDEPTH) {
cvs_log(LP_ERR,
"MT scope stack has reached max depth");
return (-1);
}
cvs_mt_stack[cvs_mtstk_depth] = strdup(line + 1);
if (cvs_mt_stack[cvs_mtstk_depth] == NULL)
return (-1);
cvs_mtstk_depth++;
}
else if (*line == '-') {
if (cvs_mtstk_depth == 0) {
cvs_log(LP_ERR, "MT scope stack underflow");
return (-1);
}
else if (strcmp(line + 1,
cvs_mt_stack[cvs_mtstk_depth - 1]) != 0) {
cvs_log(LP_ERR, "mismatch in MT scope stack");
return (-1);
}
free(cvs_mt_stack[cvs_mtstk_depth--]);
}
else {
if (strcmp(line, "newline") == 0)
putc('\n', stdout);
else if (strncmp(line, "fname ", 6) == 0)
printf("%s", line + 6);
else {
/* assume text */
cp = strchr(line, ' ');
if (cp != NULL)
printf("%s", cp + 1);
}
}
return (0);
case CVS_RESP_MBINARY:
cvs_log(LP_WARN, "Mbinary not supported in client yet");
break;
}
fputs(line, stream);
fputc('\n', stream);
return (0);
}
/*
* cvs_resp_ok()
*
* Handler for the `ok' response. This handler's job is to
*/
static int
cvs_resp_ok(struct cvsroot *root, int type, char *line)
{
return (1);
}
/*
* cvs_resp_error()
*
* Handler for the `error' response. This handler's job is to
*/
static int
cvs_resp_error(struct cvsroot *root, int type, char *line)
{
return (1);
}
/*
* cvs_resp_statdir()
*
* Handler for the `Clear-static-directory' and `Set-static-directory'
* responses.
*/
static int
cvs_resp_statdir(struct cvsroot *root, int type, char *line)
{
int fd;
char rpath[MAXPATHLEN], statpath[MAXPATHLEN];
cvs_getln(root, rpath, sizeof(rpath));
snprintf(statpath, sizeof(statpath), "%s/%s", line,
CVS_PATH_STATICENTRIES);
if ((type == CVS_RESP_CLRSTATDIR) &&
(unlink(statpath) == -1) && (errno != ENOENT)) {
cvs_log(LP_ERRNO, "failed to unlink %s file",
CVS_PATH_STATICENTRIES);
return (-1);
}
else if (type == CVS_RESP_SETSTATDIR) {
fd = open(statpath, O_CREAT|O_TRUNC|O_WRONLY, 0400);
if (fd == -1) {
cvs_log(LP_ERRNO, "failed to create %s file",
CVS_PATH_STATICENTRIES);
return (-1);
}
(void)close(fd);
}
return (0);
}
/*
* cvs_resp_sticky()
*
* Handler for the `Clear-sticky' and `Set-sticky' responses.
*/
static int
cvs_resp_sticky(struct cvsroot *root, int type, char *line)
{
size_t len;
char rpath[MAXPATHLEN];
struct stat st;
CVSFILE *cf;
/* remove trailing slash */
len = strlen(line);
if ((len > 0) && (line[len - 1] == '/'))
line[--len] = '\0';
/* get the remote path */
cvs_getln(root, rpath, sizeof(rpath));
/* if the directory doesn't exist, create it */
if (stat(line, &st) == -1) {
/* attempt to create it */
if (errno != ENOENT) {
cvs_log(LP_ERRNO, "failed to stat %s", line);
}
else {
cf = cvs_file_create(line, DT_DIR, 0755);
if (cf == NULL)
return (-1);
cf->cf_ddat->cd_repo = strdup(line);
cf->cf_ddat->cd_root = root;
root->cr_ref++;
cvs_mkadmin(cf, 0755);
cvs_file_free(cf);
}
}
if (type == CVS_RESP_CLRSTICKY) {
}
else if (type == CVS_RESP_SETSTICKY) {
}
return (0);
}
/*
* cvs_resp_newentry()
*
* Handler for the `New-entry' response and `Checked-in' responses.
*/
static int
cvs_resp_newentry(struct cvsroot *root, int type, char *line)
{
char entbuf[128];
CVSENTRIES *entfile;
/* get the remote path */
cvs_getln(root, entbuf, sizeof(entbuf));
/* get the new Entries line */
if (cvs_getln(root, entbuf, sizeof(entbuf)) < 0)
return (-1);
entfile = cvs_ent_open(line, O_WRONLY);
if (entfile == NULL)
return (-1);
cvs_ent_addln(entfile, entbuf);
cvs_ent_close(entfile);
return (0);
}
/*
* cvs_resp_cksum()
*
* Handler for the `Checksum' response. We store the checksum received for
* the next file in a dynamically-allocated buffer pointed to by <cvs_fcksum>.
* Upon next file reception, the handler checks to see if there is a stored
* checksum.
* The file handler must make sure that the checksums match and free the
* checksum buffer once it's done to indicate there is no further checksum.
*/
static int
cvs_resp_cksum(struct cvsroot *root, int type, char *line)
{
if (cvs_fcksum != NULL) {
cvs_log(LP_WARN, "unused checksum");
free(cvs_fcksum);
}
cvs_fcksum = strdup(line);
if (cvs_fcksum == NULL) {
cvs_log(LP_ERRNO, "failed to copy checksum string");
return (-1);
}
return (0);
}
/*
* cvs_resp_modtime()
*
* Handler for the `Mod-time' file update modifying response. The timestamp
* given is used to set the last modification time on the next file that
* will be received.
*/
static int
cvs_resp_modtime(struct cvsroot *root, int type, char *line)
{
int i;
long off;
char sign, mon[8], gmt[8], hr[4], min[4], *ep;
struct tm cvs_tm;
memset(&cvs_tm, 0, sizeof(cvs_tm));
sscanf(line, "%d %3s %d %2d:%2d:%2d %5s", &cvs_tm.tm_mday, mon,
&cvs_tm.tm_year, &cvs_tm.tm_hour, &cvs_tm.tm_min,
&cvs_tm.tm_sec, gmt);
cvs_tm.tm_year -= 1900;
cvs_tm.tm_isdst = -1;
if (*gmt == '-') {
sscanf(gmt, "%c%2s%2s", &sign, hr, min);
cvs_tm.tm_gmtoff = strtol(hr, &ep, 10);
if ((cvs_tm.tm_gmtoff == LONG_MIN) ||
(cvs_tm.tm_gmtoff == LONG_MAX) ||
(*ep != '\0')) {
cvs_log(LP_ERR,
"parse error in GMT hours specification `%s'", hr);
cvs_tm.tm_gmtoff = 0;
}
else {
/* get seconds */
cvs_tm.tm_gmtoff *= 3600;
/* add the minutes */
off = strtol(min, &ep, 10);
if ((cvs_tm.tm_gmtoff == LONG_MIN) ||
(cvs_tm.tm_gmtoff == LONG_MAX) ||
(*ep != '\0')) {
cvs_log(LP_ERR,
"parse error in GMT minutes "
"specification `%s'", min);
}
else
cvs_tm.tm_gmtoff += off * 60;
}
}
if (sign == '-')
cvs_tm.tm_gmtoff = -cvs_tm.tm_gmtoff;
for (i = 0; i < (int)(sizeof(cvs_months)/sizeof(cvs_months[0])); i++) {
if (strcmp(cvs_months[i], mon) == 0) {
cvs_tm.tm_mon = i;
break;
}
}
cvs_modtime = mktime(&cvs_tm);
return (0);
}
/*
* cvs_resp_updated()
*
* Handler for the `Updated' and `Created' responses.
*/
static int
cvs_resp_updated(struct cvsroot *root, int type, char *line)
{
size_t len;
mode_t fmode;
char tbuf[32], path[MAXPATHLEN], cksum_buf[CVS_CKSUM_LEN];
BUF *fbuf;
CVSENTRIES *ef;
struct cvs_ent *ep;
ep = NULL;
len = strlen(tbuf);
if ((len > 0) && (tbuf[len - 1] == '\n'))
tbuf[--len] = '\0';
/* read the remote path of the file */
cvs_getln(root, path, sizeof(path));
/* read the new entry */
cvs_getln(root, path, sizeof(path));
ep = cvs_ent_parse(path);
if (ep == NULL)
return (-1);
snprintf(path, sizeof(path), "%s/%s", line, ep->ce_name);
if (type == CVS_RESP_CREATED) {
/* set the timestamp as the last one received from Mod-time */
ep->ce_timestamp = ctime_r(&cvs_modtime, tbuf);
ef = cvs_ent_open(line, O_WRONLY);
if (ef == NULL)
return (-1);
cvs_ent_add(ef, ep);
cvs_ent_close(ef);
}
else if (type == CVS_RESP_UPDEXIST) {
}
else if (type == CVS_RESP_UPDATED) {
}
fbuf = cvs_recvfile(root, &fmode);
if (fbuf == NULL)
return (-1);
cvs_buf_write(fbuf, path, fmode);
/* now see if there is a checksum */
if (cvs_fcksum != NULL) {
if (cvs_cksum(path, cksum_buf, sizeof(cksum_buf)) < 0) {
}
if (strcmp(cksum_buf, cvs_fcksum) != 0) {
cvs_log(LP_ERR, "checksum error on received file");
(void)unlink(line);
}
free(cvs_fcksum);
cvs_fcksum = NULL;
}
return (0);
}
/*
* cvs_resp_removed()
*
* Handler for the `Updated' response.
*/
static int
cvs_resp_removed(struct cvsroot *root, int type, char *line)
{
return (0);
}
/*
* cvs_resp_mode()
*
* Handler for the `Mode' response.
*/
static int
cvs_resp_mode(struct cvsroot *root, int type, char *line)
{
if (cvs_strtomode(line, &cvs_lastmode) < 0) {
return (-1);
}
return (0);
}
/*
* cvs_resp_modxpand()
*
* Handler for the `Module-expansion' response.
*/
static int
cvs_resp_modxpand(struct cvsroot *root, int type, char *line)
{
return (0);
}
/*
* cvs_resp_rcsdiff()
*
* Handler for the `Rcs-diff' response.
*/
static int
cvs_resp_rcsdiff(struct cvsroot *root, int type, char *line)
{
char file[MAXPATHLEN], buf[MAXPATHLEN], cksum_buf[CVS_CKSUM_LEN];
char *fname, *orig, *patch;
mode_t fmode;
BUF *res, *fcont, *patchbuf;
CVSENTRIES *entf;
struct cvs_ent *ent;
/* get remote path and build local path of file to be patched */
cvs_getln(root, buf, sizeof(buf));
fname = strrchr(buf, '/');
if (fname == NULL)
fname = buf;
snprintf(file, sizeof(file), "%s%s", line, fname);
/* get updated entry fields */
cvs_getln(root, buf, sizeof(buf));
ent = cvs_ent_parse(buf);
if (ent == NULL) {
return (-1);
}
patchbuf = cvs_recvfile(root, &fmode);
fcont = cvs_buf_load(file, BUF_AUTOEXT);
if (fcont == NULL)
return (-1);
cvs_buf_putc(patchbuf, '\0');
cvs_buf_putc(fcont, '\0');
orig = cvs_buf_release(fcont);
patch = cvs_buf_release(patchbuf);
res = rcs_patch(orig, patch);
if (res == NULL)
return (-1);
cvs_buf_write(res, file, fmode);
/* now see if there is a checksum */
if (cvs_fcksum != NULL) {
if (cvs_cksum(file, cksum_buf, sizeof(cksum_buf)) < 0) {
}
if (strcmp(cksum_buf, cvs_fcksum) != 0) {
cvs_log(LP_ERR, "checksum error on received file");
(void)unlink(file);
}
free(cvs_fcksum);
cvs_fcksum = NULL;
}
/* update revision in entries */
entf = cvs_ent_open(line, O_WRONLY);
if (entf == NULL)
return (-1);
cvs_ent_close(entf);
return (0);
}
/*
* cvs_resp_template()
*
* Handler for the `Template' response.
*/
static int
cvs_resp_template(struct cvsroot *root, int type, char *line)
{
mode_t mode;
BUF *tmpl;
tmpl = cvs_recvfile(root, &mode);
if (tmpl == NULL)
return (-1);
return (0);
}
/*
* cvs_sendfile()
*
* Send the mode and size of a file followed by the file's contents.
* Returns 0 on success, or -1 on failure.
*/
int
cvs_sendfile(struct cvsroot *root, const char *path)
{
int fd;
ssize_t ret;
char buf[4096];
struct stat st;
if (stat(path, &st) == -1) {
cvs_log(LP_ERRNO, "failed to stat `%s'", path);
return (-1);
}
fd = open(path, O_RDONLY, 0);
if (fd == -1) {
return (-1);
}
if (cvs_modetostr(st.st_mode, buf, sizeof(buf)) < 0)
return (-1);
cvs_sendln(root, buf);
snprintf(buf, sizeof(buf), "%lld\n", st.st_size);
cvs_sendln(root, buf);
while ((ret = read(fd, buf, sizeof(buf))) != 0) {
if (ret == -1) {
cvs_log(LP_ERRNO, "failed to read file `%s'", path);
return (-1);
}
cvs_sendraw(root, buf, (size_t)ret);
}
(void)close(fd);
return (0);
}
/*
* cvs_recvfile()
*
* Receive the mode and size of a file followed the file's contents and
* create or update the file whose path is <path> with the received
* information.
*/
BUF*
cvs_recvfile(struct cvsroot *root, mode_t *mode)
{
size_t len;
ssize_t ret;
off_t fsz, cnt;
char buf[4096], *ep;
BUF *fbuf;
fbuf = cvs_buf_alloc(sizeof(buf), BUF_AUTOEXT);
if (fbuf == NULL)
return (NULL);
if ((cvs_getln(root, buf, sizeof(buf)) < 0) ||
(cvs_strtomode(buf, mode) < 0)) {
return (NULL);
}
cvs_getln(root, buf, sizeof(buf));
fsz = (off_t)strtol(buf, &ep, 10);
if (*ep != '\0') {
cvs_log(LP_ERR, "parse error in file size transmission");
return (NULL);
}
cnt = 0;
do {
len = MIN(sizeof(buf), (size_t)(fsz - cnt));
if (len == 0)
break;
ret = cvs_recvraw(root, buf, len);
if (ret == -1) {
cvs_buf_free(fbuf);
return (NULL);
}
if (cvs_buf_append(fbuf, buf, (size_t)ret) == -1) {
cvs_log(LP_ERR,
"failed to append received file data");
cvs_buf_free(fbuf);
return (NULL);
}
cnt += (off_t)ret;
} while (cnt < fsz);
return (fbuf);
}
/*
* cvs_sendreq()
*
* Send a request to the server of type <rid>, with optional arguments
* contained in <arg>, which should not be terminated by a newline.
* Returns 0 on success, or -1 on failure.
*/
int
cvs_sendreq(struct cvsroot *root, u_int rid, const char *arg)
{
int ret;
struct cvs_req *req;
if (root->cr_srvin == NULL) {
cvs_log(LP_ERR, "cannot send request: Not connected");
return (-1);
}
req = cvs_req_getbyid(rid);
if (req == NULL) {
cvs_log(LP_ERR, "unsupported request type %u", rid);
return (-1);
}
snprintf(cvs_proto_buf, sizeof(cvs_proto_buf), "%s%s%s\n",
req->req_str, (arg == NULL) ? "" : " ", (arg == NULL) ? "" : arg);
if (cvs_server_inlog != NULL)
fputs(cvs_proto_buf, cvs_server_inlog);
ret = fputs(cvs_proto_buf, root->cr_srvin);
if (ret == EOF) {
cvs_log(LP_ERRNO, "failed to send request to server");
return (-1);
}
if (req->req_flags & CVS_REQF_RESP)
ret = cvs_getresp(root);
return (ret);
}
/*
* cvs_getresp()
*
* Get a response from the server. This call will actually read and handle
* responses from the server until one of the response handlers returns
* non-zero (either an error occured or the end of the response was reached).
* Returns the number of handled commands on success, or -1 on failure.
*/
int
cvs_getresp(struct cvsroot *root)
{
int nbcmd, ret;
size_t len;
nbcmd = 0;
do {
/* wait for incoming data */
if (fgets(cvs_proto_buf, sizeof(cvs_proto_buf),
root->cr_srvout) == NULL) {
if (feof(root->cr_srvout))
return (0);
cvs_log(LP_ERRNO,
"failed to read response from server");
return (-1);
}
if (cvs_server_outlog != NULL)
fputs(cvs_proto_buf, cvs_server_outlog);
if ((len = strlen(cvs_proto_buf)) != 0) {
if (cvs_proto_buf[len - 1] != '\n') {
/* truncated line */
}
else
cvs_proto_buf[--len] = '\0';
}
ret = cvs_resp_handle(root, cvs_proto_buf);
nbcmd++;
} while (ret == 0);
if (ret > 0)
ret = nbcmd;
return (ret);
}
/*
* cvs_getln()
*
* Get a line from the server's output and store it in <lbuf>. The terminating
* newline character is stripped from the result.
*/
int
cvs_getln(struct cvsroot *root, char *lbuf, size_t len)
{
size_t rlen;
if (fgets(lbuf, len, root->cr_srvout) == NULL) {
if (ferror(root->cr_srvout)) {
cvs_log(LP_ERRNO, "failed to read line from server");
return (-1);
}
if (feof(root->cr_srvout))
*lbuf = '\0';
}
if (cvs_server_outlog != NULL)
fputs(lbuf, cvs_server_outlog);
rlen = strlen(lbuf);
if ((rlen > 0) && (lbuf[rlen - 1] == '\n'))
lbuf[--rlen] = '\0';
return (0);
}
#ifdef notyet
/*
* cvs_sendresp()
*
* Send a response to the client of type <rid>, with optional arguments
* contained in <arg>, which should not be terminated by a newline.
* Returns 0 on success, or -1 on failure.
*/
int
cvs_sendresp(u_int rid, const char *arg)
{
int ret;
size_t len;
const char *resp;
resp = cvs_resp_getbyid(rid);
if (resp == NULL) {
cvs_log(LP_ERR, "unsupported response type %u", rid);
return (-1);
}
snprintf(cvs_proto_buf, sizeof(cvs_proto_buf), "%s %s\n", resp,
(arg == NULL) ? "" : arg);
ret = fputs(resp, stdout);
if (ret == EOF) {
cvs_log(LP_ERRNO, "failed to send response to client");
}
else {
if (arg != NULL)
ret = fprintf(stdout, " %s", arg);
putc('\n', stdout);
}
return (0);
}
/*
* cvs_getreq()
*
* Get a request from the client.
*/
int
cvs_getreq(void)
{
int nbcmd;
nbcmd = 0;
do {
/* wait for incoming data */
if (fgets(cvs_proto_buf, sizeof(cvs_proto_buf),
stdin) == NULL) {
if (feof(stdin))
return (0);
cvs_log(LP_ERRNO,
"failed to read request from client");
return (-1);
}
if ((len = strlen(cvs_proto_buf)) != 0) {
if (cvs_proto_buf[len - 1] != '\n') {
/* truncated line */
}
else
cvs_proto_buf[--len] = '\0';
}
ret = cvs_resp_handle(cvs_proto_buf);
} while (ret == 0);
}
#endif
/*
* cvs_sendln()
*
* Send a single line <line> string to the server. The line is sent as is,
* without any modifications.
* Returns 0 on success, or -1 on failure.
*/
int
cvs_sendln(struct cvsroot *root, const char *line)
{
int nl;
size_t len;
nl = 0;
len = strlen(line);
if ((len > 0) && (line[len - 1] != '\n'))
nl = 1;
if (cvs_server_inlog != NULL) {
fputs(line, cvs_server_inlog);
if (nl)
fputc('\n', cvs_server_inlog);
}
fputs(line, root->cr_srvin);
if (nl)
fputc('\n', root->cr_srvin);
return (0);
}
/*
* cvs_sendraw()
*
* Send the first <len> bytes from the buffer <src> to the server.
*/
int
cvs_sendraw(struct cvsroot *root, const void *src, size_t len)
{
if (cvs_server_inlog != NULL)
fwrite(src, sizeof(char), len, cvs_server_inlog);
if (fwrite(src, sizeof(char), len, root->cr_srvin) < len) {
return (-1);
}
return (0);
}
/*
* cvs_recvraw()
*
* Receive the first <len> bytes from the buffer <src> to the server.
*/
ssize_t
cvs_recvraw(struct cvsroot *root, void *dst, size_t len)
{
size_t ret;
ret = fread(dst, sizeof(char), len, root->cr_srvout);
if (ret == 0)
return (-1);
if (cvs_server_outlog != NULL)
fwrite(dst, sizeof(char), len, cvs_server_outlog);
return (ssize_t)ret;
}
/*
* cvs_senddir()
*
* Send a `Directory' request along with the 2 paths that follow it.
*/
int
cvs_senddir(struct cvsroot *root, CVSFILE *dir)
{
char buf[MAXPATHLEN];
if (dir->cf_ddat->cd_repo == NULL)
strlcpy(buf, root->cr_dir, sizeof(buf));
else
snprintf(buf, sizeof(buf), "%s/%s", root->cr_dir,
dir->cf_ddat->cd_repo);
if ((cvs_sendreq(root, CVS_REQ_DIRECTORY, dir->cf_path) < 0) ||
(cvs_sendln(root, buf) < 0))
return (-1);
return (0);
}
/*
* cvs_sendarg()
*
* Send the argument <arg> to the server. The argument <append> is used to
* determine if the argument should be simply appended to the last argument
* sent or if it should be created as a new argument (0).
*/
int
cvs_sendarg(struct cvsroot *root, const char *arg, int append)
{
return cvs_sendreq(root, ((append == 0) ?
CVS_REQ_ARGUMENT : CVS_REQ_ARGUMENTX), arg);
}
/*
* cvs_sendentry()
*
* Send an `Entry' request to the server along with the mandatory fields from
* the CVS entry <ent> (which are the name and revision).
*/
int
cvs_sendentry(struct cvsroot *root, const struct cvs_ent *ent)
{
char ebuf[128], numbuf[64];
snprintf(ebuf, sizeof(ebuf), "/%s/%s///", ent->ce_name,
rcsnum_tostr(ent->ce_rev, numbuf, sizeof(numbuf)));
return cvs_sendreq(root, CVS_REQ_ENTRY, ebuf);
}
/*
* cvs_initlog()
*
* Initialize protocol logging if the CVS_CLIENT_LOG environment variable is
* set. In this case, the variable's value is used as a path to which the
* appropriate suffix is added (".in" for server input and ".out" for server
* output.
* Returns 0 on success, or -1 on failure.
*/
static int
cvs_initlog(void)
{
char *env, fpath[MAXPATHLEN];
/* avoid doing it more than once */
if (cvs_server_logon)
return (0);
env = getenv("CVS_CLIENT_LOG");
if (env == NULL)
return (0);
strlcpy(fpath, env, sizeof(fpath));
strlcat(fpath, ".in", sizeof(fpath));
cvs_server_inlog = fopen(fpath, "w");
if (cvs_server_inlog == NULL) {
cvs_log(LP_ERRNO, "failed to open server input log `%s'",
fpath);
return (-1);
}
strlcpy(fpath, env, sizeof(fpath));
strlcat(fpath, ".out", sizeof(fpath));
cvs_server_outlog = fopen(fpath, "w");
if (cvs_server_outlog == NULL) {
cvs_log(LP_ERRNO, "failed to open server output log `%s'",
fpath);
return (-1);
}
/* make the streams line-buffered */
setvbuf(cvs_server_inlog, NULL, _IOLBF, 0);
setvbuf(cvs_server_outlog, NULL, _IOLBF, 0);
cvs_server_logon = 1;
return (0);
}
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