contrib/hgsh/hgsh.c
author Matt Harbison <matt_harbison@yahoo.com>
Thu, 20 Sep 2018 17:27:01 -0700
changeset 40324 6637b079ae45
parent 35960 580f7b1b88c7
permissions -rw-r--r--
lfs: autoload the extension when cloning from repo with lfs enabled This is based on a patch by Gregory Szorc. I made small adjustments to clean up the messaging when the server has the extension enabled, but the client has it disabled (to prevent autoloading). Additionally, I added a second server capability to distinguish between the server having the extension enabled, and the server having LFS commits. This helps prevent unnecessary requirement propagation- the client shouldn't add a requirement that the server doesn't have, just because the server had the extension loaded. The TODO I had about advertising a capability when the server can natively serve up blobs isn't relevant anymore (we've had 2 releases that support this), so I dropped it. Currently, we lazily add the "lfs" requirement to a repo when we first encounter LFS data. Due to a pretxnchangegroup hook that looks for LFS data, this can happen at the end of clone. Now that we have more control over how repositories are created, we can do better. This commit adds a repo creation option to add the "lfs" requirement. hg.clone() sets this creation option if the remote peer is advertising lfs usage (as opposed to just support needed to push). So, what this change effectively does is have cloned repos automatically inherit the "lfs" requirement. Differential Revision: https://phab.mercurial-scm.org/D5130
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/*
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 * hgsh.c - restricted login shell for mercurial
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 *
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 * Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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 *
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 * This software may be used and distributed according to the terms of the
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 * GNU General Public License, incorporated herein by reference.
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 *
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 * this program is login shell for dedicated mercurial user account. it
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 * only allows few actions:
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 *
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 * 1. run hg in server mode on specific repository. no other hg commands
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 * are allowed. we try to verify that repo to be accessed exists under
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 * given top-level directory.
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 *
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 * 2. (optional) forward ssh connection from firewall/gateway machine to
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 * "real" mercurial host, to let users outside intranet pull and push
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 * changes through firewall.
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 *
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 * 3. (optional) run normal shell, to allow to "su" to mercurial user, use
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 * "sudo" to run programs as that user, or run cron jobs as that user.
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 *
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 * only tested on linux yet. patches for non-linux systems welcome.
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 */
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE /* for asprintf */
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#endif
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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 <sys/stat.h>
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#include <sys/types.h>
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#include <sysexits.h>
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#include <unistd.h>
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/*
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 * user config.
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 *
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 * if you see a hostname below, just use first part of hostname. example,
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 * if you have host named foo.bar.com, use "foo".
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 */
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/*
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 * HG_GATEWAY: hostname of gateway/firewall machine that people outside your
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 * intranet ssh into if they need to ssh to other machines. if you do not
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 * have such machine, set to NULL.
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 */
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#ifndef HG_GATEWAY
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#define HG_GATEWAY "gateway"
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#endif
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/*
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 * HG_HOST: hostname of mercurial server. if any machine is allowed, set to
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 * NULL.
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 */
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#ifndef HG_HOST
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#define HG_HOST "mercurial"
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#endif
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/*
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 * HG_USER: username to log in from HG_GATEWAY to HG_HOST. if gateway and
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 * host username are same, set to NULL.
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 */
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#ifndef HG_USER
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#define HG_USER "hg"
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#endif
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/*
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 * HG_ROOT: root of tree full of mercurial repos. if you do not want to
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 * validate location of repo when someone is try to access, set to NULL.
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 */
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#ifndef HG_ROOT
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#define HG_ROOT "/home/hg/repos"
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#endif
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/*
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 * HG: path to the mercurial executable to run.
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 */
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#ifndef HG
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#define HG "/home/hg/bin/hg"
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#endif
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/*
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 * HG_SHELL: shell to use for actions like "sudo" and "su" access to
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 * mercurial user, and cron jobs. if you want to make these things
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 * impossible, set to NULL.
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 */
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#ifndef HG_SHELL
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#define HG_SHELL NULL
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/* #define HG_SHELL        "/bin/bash" */
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#endif
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/*
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 * HG_HELP: some way for users to get support if they have problem. if they
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 * should not get helpful message, set to NULL.
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 */
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#ifndef HG_HELP
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#define HG_HELP "please contact support@example.com for help."
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#endif
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/*
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 * SSH: path to ssh executable to run, if forwarding from HG_GATEWAY to
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 * HG_HOST. if you want to use rsh instead (why?), you need to modify
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 * arguments it is called with. see forward_through_gateway.
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 */
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#ifndef SSH
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#define SSH "/usr/bin/ssh"
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#endif
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/*
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 * tell whether to print command that is to be executed. useful for
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 * debugging. should not interfere with mercurial operation, since
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 * mercurial only cares about stdin and stdout, and this prints to stderr.
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 */
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static const int debug = 0;
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static void print_cmdline(int argc, char **argv)
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{
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	FILE *fp = stderr;
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	int i;
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	fputs("command: ", fp);
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	for (i = 0; i < argc; i++) {
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		char *spc = strpbrk(argv[i], " \t\r\n");
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		if (spc) {
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			fputc('\'', fp);
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		}
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   131
		fputs(argv[i], fp);
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   132
		if (spc) {
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   133
			fputc('\'', fp);
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   134
		}
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   135
		if (i < argc - 1) {
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   136
			fputc(' ', fp);
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   137
		}
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   138
	}
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   139
	fputc('\n', fp);
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	fflush(fp);
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}
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   142
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   143
static void usage(const char *reason, int exitcode)
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{
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	char *hg_help = HG_HELP;
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   146
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   147
	if (reason) {
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   148
		fprintf(stderr, "*** Error: %s.\n", reason);
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   149
	}
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	fprintf(stderr, "*** This program has been invoked incorrectly.\n");
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   151
	if (hg_help) {
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   152
		fprintf(stderr, "*** %s\n", hg_help);
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   153
	}
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	exit(exitcode ? exitcode : EX_USAGE);
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   155
}
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   156
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   157
/*
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   158
 * run on gateway host to make another ssh connection, to "real" mercurial
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   159
 * server. it sends its command line unmodified to far end.
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   160
 *
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   161
 * never called if HG_GATEWAY is NULL.
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   162
 */
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   163
static void forward_through_gateway(int argc, char **argv)
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   164
{
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   165
	char *ssh = SSH;
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   166
	char *hg_host = HG_HOST;
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   167
	char *hg_user = HG_USER;
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   168
	char **nargv = alloca((10 + argc) * sizeof(char *));
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   169
	int i = 0, j;
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   170
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   171
	nargv[i++] = ssh;
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   172
	nargv[i++] = "-q";
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   173
	nargv[i++] = "-T";
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   174
	nargv[i++] = "-x";
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   175
	if (hg_user) {
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   176
		nargv[i++] = "-l";
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   177
		nargv[i++] = hg_user;
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   178
	}
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   179
	nargv[i++] = hg_host;
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   180
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   181
	/*
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   182
	 * sshd called us with added "-c", because it thinks we are a shell.
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   183
	 * drop it if we find it.
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   184
	 */
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   185
	j = 1;
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   186
	if (j < argc && strcmp(argv[j], "-c") == 0) {
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   187
		j++;
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   188
	}
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   189
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   190
	for (; j < argc; i++, j++) {
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   191
		nargv[i] = argv[j];
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   192
	}
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   193
	nargv[i] = NULL;
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   194
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   195
	if (debug) {
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   196
		print_cmdline(i, nargv);
08a0f04b56bd many, many trivial check-code fixups
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   197
	}
2341
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   198
10282
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   199
	execv(ssh, nargv);
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   200
	perror(ssh);
08a0f04b56bd many, many trivial check-code fixups
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   201
	exit(EX_UNAVAILABLE);
2341
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   202
}
dbbe7f72d15a contrib: add restricted shell.
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   203
dbbe7f72d15a contrib: add restricted shell.
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diff changeset
   204
/*
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diff changeset
   205
 * run shell. let administrator "su" to mercurial user's account to do
dbbe7f72d15a contrib: add restricted shell.
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parents:
diff changeset
   206
 * administrative works.
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diff changeset
   207
 *
dbbe7f72d15a contrib: add restricted shell.
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   208
 * never called if HG_SHELL is NULL.
dbbe7f72d15a contrib: add restricted shell.
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diff changeset
   209
 */
dbbe7f72d15a contrib: add restricted shell.
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diff changeset
   210
static void run_shell(int argc, char **argv)
dbbe7f72d15a contrib: add restricted shell.
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diff changeset
   211
{
10282
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   212
	char *hg_shell = HG_SHELL;
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   213
	char **nargv;
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   214
	char *c;
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   215
	int i;
2341
dbbe7f72d15a contrib: add restricted shell.
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diff changeset
   216
10282
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diff changeset
   217
	nargv = alloca((argc + 3) * sizeof(char *));
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   218
	c = strrchr(hg_shell, '/');
2341
dbbe7f72d15a contrib: add restricted shell.
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parents:
diff changeset
   219
10282
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   220
	/* tell "real" shell it is login shell, if needed. */
2341
dbbe7f72d15a contrib: add restricted shell.
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parents:
diff changeset
   221
10282
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   222
	if (argv[0][0] == '-' && c) {
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   223
		nargv[0] = strdup(c);
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   224
		if (nargv[0] == NULL) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   225
			perror("malloc");
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   226
			exit(EX_OSERR);
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   227
		}
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   228
		nargv[0][0] = '-';
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   229
	} else {
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   230
		nargv[0] = hg_shell;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   231
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   232
10282
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   233
	for (i = 1; i < argc; i++) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   234
		nargv[i] = argv[i];
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   235
	}
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   236
	nargv[i] = NULL;
2341
dbbe7f72d15a contrib: add restricted shell.
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parents:
diff changeset
   237
10282
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diff changeset
   238
	if (debug) {
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   239
		print_cmdline(i, nargv);
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   240
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   241
10282
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   242
	execv(hg_shell, nargv);
08a0f04b56bd many, many trivial check-code fixups
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parents: 5081
diff changeset
   243
	perror(hg_shell);
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   244
	exit(EX_OSFILE);
2341
dbbe7f72d15a contrib: add restricted shell.
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parents:
diff changeset
   245
}
dbbe7f72d15a contrib: add restricted shell.
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parents:
diff changeset
   246
2602
9cbeef33eaa3 contrib/hgsh: make to work with remote clone over ssh.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2341
diff changeset
   247
enum cmdline {
10282
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   248
	hg_init,
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   249
	hg_serve,
2602
9cbeef33eaa3 contrib/hgsh: make to work with remote clone over ssh.
Vadim Gelfer <vadim.gelfer@gmail.com>
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diff changeset
   250
};
9cbeef33eaa3 contrib/hgsh: make to work with remote clone over ssh.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2341
diff changeset
   251
2341
dbbe7f72d15a contrib: add restricted shell.
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   252
/*
4419
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   253
 * attempt to verify that a directory is really a hg repo, by testing
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   254
 * for the existence of a subdirectory.
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   255
 */
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   256
static int validate_repo(const char *repo_root, const char *subdir)
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   257
{
10282
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diff changeset
   258
	char *abs_path;
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   259
	struct stat st;
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   260
	int ret;
4419
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   261
10282
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diff changeset
   262
	if (asprintf(&abs_path, "%s.hg/%s", repo_root, subdir) == -1) {
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   263
		ret = -1;
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   264
		goto bail;
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   265
	}
4419
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   266
10282
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diff changeset
   267
	/* verify that we really are looking at valid repo. */
4419
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   268
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   269
	if (stat(abs_path, &st) == -1) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   270
		ret = 0;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   271
	} else {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   272
		ret = 1;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   273
	}
4419
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   274
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   275
bail:
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   276
	return ret;
4419
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   277
}
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   278
59ddd43f609f contrib/hgsh: Check for .hg/store as well as .hg/data.
Bryan O'Sullivan <bos@serpentine.com>
parents: 2602
diff changeset
   279
/*
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   280
 * paranoid wrapper, runs hg executable in server mode.
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   281
 */
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   282
static void serve_data(int argc, char **argv)
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   283
{
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   284
	char *hg_root = HG_ROOT;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   285
	char *repo, *repo_root;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   286
	enum cmdline cmd;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   287
	char *nargv[6];
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   288
	size_t repolen;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   289
	int i;
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   290
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   291
	/*
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   292
	 * check argv for looking okay. we should be invoked with argv
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   293
	 * resembling like this:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   294
	 *
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   295
	 *   hgsh
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   296
	 *   -c
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   297
	 *   hg -R some/path serve --stdio
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   298
	 *
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   299
	 * the "-c" is added by sshd, because it thinks we are login shell.
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   300
	 */
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   301
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   302
	if (argc != 3) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   303
		goto badargs;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   304
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   305
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   306
	if (strcmp(argv[1], "-c") != 0) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   307
		goto badargs;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   308
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   309
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   310
	if (sscanf(argv[2], "hg init %as", &repo) == 1) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   311
		cmd = hg_init;
35960
580f7b1b88c7 hgsh: enable clang-format
Augie Fackler <augie@google.com>
parents: 13302
diff changeset
   312
	} else if (sscanf(argv[2], "hg -R %as serve --stdio", &repo) == 1) {
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   313
		cmd = hg_serve;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   314
	} else {
2602
9cbeef33eaa3 contrib/hgsh: make to work with remote clone over ssh.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2341
diff changeset
   315
		goto badargs;
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   316
	}
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4419
diff changeset
   317
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   318
	repolen = repo ? strlen(repo) : 0;
2602
9cbeef33eaa3 contrib/hgsh: make to work with remote clone over ssh.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2341
diff changeset
   319
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   320
	if (repolen == 0) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   321
		goto badargs;
2602
9cbeef33eaa3 contrib/hgsh: make to work with remote clone over ssh.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2341
diff changeset
   322
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   323
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   324
	if (hg_root) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   325
		if (asprintf(&repo_root, "%s/%s/", hg_root, repo) == -1) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   326
			goto badargs;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   327
		}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   328
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   329
		/*
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   330
		 * attempt to stop break out from inside the
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   331
		 * repository tree. could do something more clever
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   332
		 * here, because e.g. we could traverse a symlink that
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   333
		 * looks safe, but really breaks us out of tree.
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   334
		 */
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   335
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   336
		if (strstr(repo_root, "/../") != NULL) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   337
			goto badargs;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   338
		}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   339
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   340
		/* only hg init expects no repo. */
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   341
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   342
		if (cmd != hg_init) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   343
			int valid;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   344
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   345
			valid = validate_repo(repo_root, "data");
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   346
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   347
			if (valid == -1) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   348
				goto badargs;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   349
			}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   350
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   351
			if (valid == 0) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   352
				valid = validate_repo(repo_root, "store");
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   353
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   354
				if (valid == -1) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   355
					goto badargs;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   356
				}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   357
			}
2602
9cbeef33eaa3 contrib/hgsh: make to work with remote clone over ssh.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2341
diff changeset
   358
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   359
			if (valid == 0) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   360
				perror(repo);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   361
				exit(EX_DATAERR);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   362
			}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   363
		}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   364
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   365
		if (chdir(hg_root) == -1) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   366
			perror(hg_root);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   367
			exit(EX_SOFTWARE);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   368
		}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   369
	}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   370
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   371
	i = 0;
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4419
diff changeset
   372
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   373
	switch (cmd) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   374
	case hg_serve:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   375
		nargv[i++] = HG;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   376
		nargv[i++] = "-R";
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   377
		nargv[i++] = repo;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   378
		nargv[i++] = "serve";
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   379
		nargv[i++] = "--stdio";
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   380
		break;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   381
	case hg_init:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   382
		nargv[i++] = HG;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   383
		nargv[i++] = "init";
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   384
		nargv[i++] = repo;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   385
		break;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   386
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   387
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   388
	nargv[i] = NULL;
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   389
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   390
	if (debug) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   391
		print_cmdline(i, nargv);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   392
	}
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   393
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   394
	execv(HG, nargv);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   395
	perror(HG);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   396
	exit(EX_UNAVAILABLE);
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   397
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   398
badargs:
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   399
	/* print useless error message. */
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   400
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   401
	usage("invalid arguments", EX_DATAERR);
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   402
}
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   403
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   404
int main(int argc, char **argv)
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   405
{
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   406
	char host[1024];
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   407
	char *c;
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   408
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   409
	if (gethostname(host, sizeof(host)) == -1) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   410
		perror("gethostname");
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   411
		exit(EX_OSERR);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   412
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   413
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   414
	if ((c = strchr(host, '.')) != NULL) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   415
		*c = '\0';
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   416
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   417
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   418
	if (getenv("SSH_CLIENT")) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   419
		char *hg_gateway = HG_GATEWAY;
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   420
		char *hg_host = HG_HOST;
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   421
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   422
		if (hg_gateway && strcmp(host, hg_gateway) == 0) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   423
			forward_through_gateway(argc, argv);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   424
		}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   425
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   426
		if (hg_host && strcmp(host, hg_host) != 0) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   427
			usage("invoked on unexpected host", EX_USAGE);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   428
		}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   429
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   430
		serve_data(argc, argv);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   431
	} else if (HG_SHELL) {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   432
		run_shell(argc, argv);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   433
	} else {
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   434
		usage("invalid arguments", EX_DATAERR);
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   435
	}
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   436
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 5081
diff changeset
   437
	return 0;
2341
dbbe7f72d15a contrib: add restricted shell.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   438
}