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git.ipfire.org Git - ipfire-2.x.git/blob - src/misc-progs/restartssh.c
1 /* SmoothWall helper program - restartssh
3 * This program is distributed under the terms of the GNU General Public
4 * Licence. See the file COPYING for details.
6 * (c) Mark Wormgoor, 2001
7 * Simple program intended to be installed setuid(0) that can be used for
10 * $Id: restartssh.c,v 1.3 2003/12/11 10:57:34 riddles Exp $
18 #include <sys/types.h>
22 #include "libsmooth.h"
27 int fd
, config_fd
, rc
, pid
;
28 char buffer
[STRING_SIZE
], command
[STRING_SIZE
] = "/bin/sed -e '";
29 struct keyvalue
*kv
= NULL
;
35 if (!readkeyvalues(kv
, CONFIG_ROOT
"/remote/settings"))
37 fprintf(stderr
, "Cannot read remote access settings\n");
41 /* By using O_CREAT with O_EXCL open() will fail if the file already exists,
42 * this prevents 2 copies of restartssh both trying to edit the config file
43 * at once. It also prevents race conditions, but these shouldn't be
44 * possible as /etc/ssh/ should only be writable by root anyhow
47 if ((config_fd
= open( "/etc/ssh/sshd_config.new", O_WRONLY
|O_CREAT
|O_EXCL
, 0644 )) == -1 )
49 perror("Unable to open new config file");
54 if(findkey(kv
, "ENABLE_SSH_PROTOCOL1", buffer
) && !strcmp(buffer
,"on"))
55 strlcat(command
, "s/^Protocol .*$/Protocol 2,1/;", STRING_SIZE
- 1 );
57 strlcat(command
, "s/^Protocol .*$/Protocol 2/;", STRING_SIZE
- 1 );
59 if(findkey(kv
, "ENABLE_SSH_KEYS", buffer
) && !strcmp(buffer
,"off"))
60 strlcat(command
, "s/^RSAAuthentication .*$/RSAAuthentication no/;"
61 "s/^PubkeyAuthentication .*$/PubkeyAuthentication no/;",
64 strlcat(command
, "s/^RSAAuthentication .*$/RSAAuthentication yes/;"
65 "s/^PubkeyAuthentication .*$/PubkeyAuthentication yes/;",
68 if(findkey(kv
, "ENABLE_SSH_PASSWORDS", buffer
) && !strcmp(buffer
,"off"))
69 strlcat(command
, "s/^PasswordAuthentication .*$/PasswordAuthentication no/;", STRING_SIZE
- 1 );
71 strlcat(command
, "s/^PasswordAuthentication .*$/PasswordAuthentication yes/;", STRING_SIZE
- 1 );
73 if(findkey(kv
, "ENABLE_SSH_PORTFW", buffer
) && !strcmp(buffer
,"on"))
74 strlcat(command
, "s/^AllowTcpForwarding .*$/AllowTcpForwarding yes/", STRING_SIZE
- 1 );
76 strlcat(command
, "s/^AllowTcpForwarding .*$/AllowTcpForwarding no/", STRING_SIZE
- 1 );
80 snprintf(buffer
, STRING_SIZE
- 1, "' /etc/ssh/sshd_config >&%d", config_fd
);
81 strlcat(command
, buffer
, STRING_SIZE
- 1);
83 if((rc
= unpriv_system(command
,99,99)) != 0)
85 fprintf(stderr
, "sed returned bad exit code: %d\n", rc
);
87 unlink("/etc/ssh/sshd_config.new");
91 if (rename("/etc/ssh/sshd_config.new","/etc/ssh/sshd_config") != 0)
93 perror("Unable to replace old config file");
94 unlink("/etc/ssh/sshd_config.new");
98 memset(buffer
, 0, STRING_SIZE
);
100 if ((fd
= open("/var/run/sshd.pid", O_RDONLY
)) != -1)
102 if (read(fd
, buffer
, STRING_SIZE
- 1) == -1)
103 fprintf(stderr
, "Couldn't read from pid file\n");
108 fprintf(stderr
, "Bad pid value\n");
111 if (kill(pid
, SIGTERM
) == -1)
112 fprintf(stderr
, "Unable to send SIGTERM\n");
114 unlink("/var/run/sshd.pid");
123 perror("Unable to open pid file");
128 if ((fd
= open(CONFIG_ROOT
"/remote/enablessh", O_RDONLY
)) != -1)
131 safe_system("/usr/sbin/sshd");