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https://github.com/sheumann/hush.git
synced 2024-08-27 03:29:05 +00:00
Run through indent, use /* */ style comments instead of //
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f853db54f9
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@ -59,22 +59,22 @@ static int config_ok;
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#define CONFIG_FILE "/etc/busybox.conf"
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// applets [] is const, so we have to define this "override" structure
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/* applets [] is const, so we have to define this "override" structure */
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struct BB_suid_config {
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struct BB_applet *m_applet;
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uid_t m_uid;
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gid_t m_gid;
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mode_t m_mode;
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struct BB_suid_config *m_next;
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};
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static struct BB_suid_config *suid_config;
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#endif // CONFIG_FEATURE_SUID_CONFIG
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#endif /* CONFIG_FEATURE_SUID_CONFIG */
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#endif // CONFIG_FEATURE_SUID
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#endif /* CONFIG_FEATURE_SUID */
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@ -142,7 +142,7 @@ void run_applet_by_name(const char *name, int argc, char **argv)
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#ifdef CONFIG_FEATURE_SUID
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check_suid ( applet_using );
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#endif
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exit((*(applet_using->main)) (argc, argv));
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}
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/* Just in case they have renamed busybox - Check argv[1] */
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@ -157,17 +157,17 @@ void run_applet_by_name(const char *name, int argc, char **argv)
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#ifdef CONFIG_FEATURE_SUID_CONFIG
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// check if u is member of group g
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/* check if u is member of group g */
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static int ingroup ( uid_t u, gid_t g )
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{
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struct group *grp = getgrgid ( g );
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if ( grp ) {
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char **mem;
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for ( mem = grp-> gr_mem; *mem; mem++ ) {
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struct passwd *pwd = getpwnam ( *mem );
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if ( pwd && ( pwd-> pw_uid == u ))
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return 1;
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}
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@ -180,43 +180,43 @@ static int ingroup ( uid_t u, gid_t g )
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void check_suid ( struct BB_applet *applet )
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{
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uid_t ruid = getuid ( ); // real [ug]id
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uid_t ruid = getuid ( ); /* real [ug]id */
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uid_t rgid = getgid ( );
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#ifdef CONFIG_FEATURE_SUID_CONFIG
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if ( config_ok ) {
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struct BB_suid_config *sct;
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for ( sct = suid_config; sct; sct = sct-> m_next ) {
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if ( sct-> m_applet == applet )
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break;
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}
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if ( sct ) {
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mode_t m = sct-> m_mode;
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if ( sct-> m_uid == ruid ) // same uid
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if ( sct-> m_uid == ruid ) /* same uid */
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m >>= 6;
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else if (( sct-> m_gid == rgid ) || ingroup ( ruid, sct-> m_gid )) // same group / in group
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else if (( sct-> m_gid == rgid ) || ingroup ( ruid, sct-> m_gid )) /* same group / in group */
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m >>= 3;
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if (!( m & S_IXOTH )) // is x bit not set ?
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if (!( m & S_IXOTH )) /* is x bit not set ? */
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error_msg_and_die ( "You have no permission to run this applet!" );
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if (( sct-> m_mode & ( S_ISGID | S_IXGRP )) == ( S_ISGID | S_IXGRP )) { // *both* have to be set for sgid
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if (( sct-> m_mode & ( S_ISGID | S_IXGRP )) == ( S_ISGID | S_IXGRP )) { /* *both* have to be set for sgid */
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if ( setegid ( sct-> m_gid ))
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error_msg_and_die ( "BusyBox binary has insufficient rights to set proper GID for applet!" );
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}
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else
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setgid ( rgid ); // no sgid -> drop
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setgid ( rgid ); /* no sgid -> drop */
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if ( sct-> m_mode & S_ISUID ) {
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if ( seteuid ( sct-> m_uid ))
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error_msg_and_die ( "BusyBox binary has insufficient rights to set proper UID for applet!" );
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}
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else
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setuid ( ruid ); // no suid -> drop
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setuid ( ruid ); /* no suid -> drop */
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}
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else { // default: drop all priviledges
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else { /* default: drop all priviledges */
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setgid ( rgid );
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setuid ( ruid );
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}
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@ -225,7 +225,7 @@ void check_suid ( struct BB_applet *applet )
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else {
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#ifndef CONFIG_FEATURE_SUID_CONFIG_QUIET
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static int onetime = 0;
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if ( !onetime ) {
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onetime = 1;
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fprintf ( stderr, "Using fallback suid method\n" );
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@ -239,7 +239,7 @@ void check_suid ( struct BB_applet *applet )
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error_msg_and_die ( "This applet requires root priviledges!" );
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}
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else if ( applet-> need_suid == _BB_SUID_NEVER ) {
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setgid ( rgid ); // drop all priviledges
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setgid ( rgid ); /* drop all priviledges */
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setuid ( ruid );
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}
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}
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@ -258,90 +258,90 @@ int parse_config_file ( void )
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int lc = 0;
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suid_config = 0;
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// is there a config file ?
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/* is there a config file ? */
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if ( stat ( CONFIG_FILE, &st ) == 0 ) {
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// is it owned by root with no write perm. for group and others ?
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/* is it owned by root with no write perm. for group and others ? */
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if ( S_ISREG( st. st_mode ) && ( st. st_uid == 0 ) && (!( st. st_mode & ( S_IWGRP | S_IWOTH )))) {
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// that's ok .. then try to open it
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/* that's ok .. then try to open it */
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f = fopen ( CONFIG_FILE, "r" );
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if ( f ) {
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char buffer [256];
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int section = 0;
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while ( fgets ( buffer, sizeof( buffer ) - 1, f )) {
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char c = buffer [0];
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char *p;
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lc++;
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p = strchr ( buffer, '#' );
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if ( p )
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*p = 0;
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p = buffer + xstrlen ( buffer );
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while (( p > buffer ) && isspace ( *--p ))
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*p = 0;
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if ( p == buffer )
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continue;
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if ( c == '[' ) {
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p = strchr ( buffer, ']' );
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if ( !p || ( p == ( buffer + 1 ))) // no matching ] or empty []
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if ( !p || ( p == ( buffer + 1 ))) /* no matching ] or empty [] */
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parse_error ( "malformed section header" );
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*p = 0;
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if ( strcasecmp ( buffer + 1, "SUID" ) == 0 )
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section = 1;
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else
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section = -1; // unknown section - just skip
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section = -1; /* unknown section - just skip */
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}
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else if ( section ) {
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switch ( section ) {
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case 1: { // SUID
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case 1: { /* SUID */
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int l;
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struct BB_applet *applet;
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p = strchr ( buffer, '=' ); // <key>[::space::]*=[::space::]*<value>
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if ( !p || ( p == ( buffer + 1 ))) // no = or key is empty
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p = strchr ( buffer, '=' ); /* <key>[::space::]*=[::space::]*<value> */
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if ( !p || ( p == ( buffer + 1 ))) /* no = or key is empty */
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parse_error ( "malformed keyword" );
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l = p - buffer;
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while ( isspace ( buffer [--l] )) { } // skip whitespace
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while ( isspace ( buffer [--l] )) { } /* skip whitespace */
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buffer [l+1] = 0;
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if (( applet = find_applet_by_name ( buffer ))) {
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struct BB_suid_config *sct = xmalloc ( sizeof( struct BB_suid_config ));
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sct-> m_applet = applet;
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sct-> m_next = suid_config;
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suid_config = sct;
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while ( isspace ( *++p )) { } // skip whitespace
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while ( isspace ( *++p )) { } /* skip whitespace */
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sct-> m_mode = 0;
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switch ( *p++ ) {
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case 'S': sct-> m_mode |= S_ISUID; break;
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case 's': sct-> m_mode |= S_ISUID; // no break
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case 's': sct-> m_mode |= S_ISUID; /* no break */
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case 'x': sct-> m_mode |= S_IXUSR; break;
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case '-': break;
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default : parse_error ( "invalid user mode" );
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}
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switch ( *p++ ) {
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case 's': sct-> m_mode |= S_ISGID; // no break
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case 's': sct-> m_mode |= S_ISGID; /* no break */
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case 'x': sct-> m_mode |= S_IXGRP; break;
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case 'S': break;
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case '-': break;
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default : parse_error ( "invalid group mode" );
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}
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switch ( *p ) {
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case 't':
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case 'x': sct-> m_mode |= S_IXOTH; break;
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@ -349,9 +349,9 @@ int parse_config_file ( void )
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case '-': break;
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default : parse_error ( "invalid other mode" );
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}
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while ( isspace ( *++p )) { } // skip whitespace
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while ( isspace ( *++p )) { } /* skip whitespace */
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if ( isdigit ( *p )) {
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sct-> m_uid = strtol ( p, &p, 10 );
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if ( *p++ != '.' )
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@ -363,13 +363,13 @@ int parse_config_file ( void )
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if ( !p2 )
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parse_error ( "parsing <uid>.<gid>" );
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*p2 = 0;
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pwd = getpwnam ( p );
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if ( !pwd )
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parse_error ( "invalid user name" );
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sct-> m_uid = pwd-> pw_uid;
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p = p2 + 1;
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}
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@ -377,16 +377,16 @@ int parse_config_file ( void )
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sct-> m_gid = strtol ( p, &p, 10 );
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else {
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struct group *grp = getgrnam ( p );
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if ( !grp )
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parse_error ( "invalid group name" );
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sct-> m_gid = grp-> gr_gid;
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}
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}
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break;
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}
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default: // unknown - skip
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default: /* unknown - skip */
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break;
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}
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}
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@ -398,8 +398,8 @@ int parse_config_file ( void )
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}
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}
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}
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return 0; // no config file or not readable (not an error)
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return 0; /* no config file or not readable (not an error) */
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pe_label:
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fprintf ( stderr, "Parse error in %s, line %d: %s\n", CONFIG_FILE, lc, err );
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