c - How can I check to see if user has execute permissions? -


i wish know how check if "user" (other running program) has execute permissions on file ? [c api]

i have looked @ "access" gives information respect caller.

i looking :-

"<cmd> <user_name> <file_name>"

here trying if <user_name> has execute permissions <file_name> ?

i looking c api ?

possible solution :- using following algo information

boolean_t is_user_has_execute_permissions(char *run_as_user) { /* check world execute permission */ if ((cmd_stat.st_mode & s_ixoth) == s_ixoth) { return (true); } /* group id run_as_user */ getpwnam_r(run_as_user, &pw, buf, passwd_len); /* check group execute permission */ if ((cmd_stat.st_mode & s_ixgrp) == s_ixgrp) { if (pw->pw_gid == cmd_stat.st_gid) return (true); } return (false); }

did see error in 1 ?

you need call stat(2), returns permission bits, owner of file, owner group, , others. have find out id of user you're interested in , ids groups: see getpwent(3) , getgrouplist(3). first match, give resulting permissions.


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