71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
#include "Contexts.h"
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// converts username to UID
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int username_to_uid( std::string username, int & uid )
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{
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// assume failure unless proven otherwise
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int r_code = false;
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struct passwd * pw;
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if ( ( pw = getpwnam( username.c_str() ) ) != NULL )
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{
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// successful user lookup
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r_code = true;
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uid = pw->pw_uid;
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} else {
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// failed lookup, do nothing, assumed failure
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}
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return r_code;
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};
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// converts group name to GID
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int groupname_to_gid( std::string groupname, int & gid )
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{
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int r_code = false;
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struct group * gp;
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if ( ( gp = getgrnam( groupname.c_str() ) ) != NULL )
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{
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r_code = true;
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gid = gp->gr_gid;
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} else {
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// failed lookup, do nothing, assumed failure
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}
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return r_code;
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}
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// SET PROCESS TO A CERTAIN IDENTITY CONTEXT
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int set_identity_context( std::string user_name, std::string group_name ) {
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// the UID and GID for the username and groupname provided for context setting
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int context_user_id;
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int context_group_id;
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int res = 0;
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// convert username to UID
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if (! ( res = username_to_uid(user_name, context_user_id ) ) )
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{
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return ERROR_NO_SUCH_USER;
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}
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// convert group name to GID
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if (! ( res = groupname_to_gid(group_name, context_group_id ) ) )
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{
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return ERROR_NO_SUCH_GROUP;
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}
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if ( ( res = setgid(context_group_id) ) ) {
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perror("lcpex: setgid failed");
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return ERROR_SETGID_FAILED;
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}
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if ( ( res = setuid(context_user_id) ) ) {
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perror("lcpex: setuid failed");
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return ERROR_SETUID_FAILED;
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}
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return ERROR_NONE;
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}
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