Man Pages – Linux Manual Pages

ci – check in RCS revisions
USAGE
ci [options] file …

DESCRIPTION
ci stores new revisions into RCS files. Each pathname matching an RCS
suffix is taken to be an RCS file. All others are assumed [...]

access – check user’s permissions for a file
USAGE
#include <unistd.h>

int access(const char *pathname, int mode);

DESCRIPTION
access() checks whether the process would be allowed to read, write or
test for [...]