man pages section 3: Basic Library Functions
    
R
 
 raise - send signal to program ( Index Term Link )
 
 rand - simple random number generator ( Index Term Link )
 
 rand - simple random-number generator ( Index Term Link )
 
 random - pseudorandom number functions ( Index Term Link )
 
 random number generator
  - drand48 ( Index Term Link )
  - erand48 ( Index Term Link )
  - jrand48 ( Index Term Link )
  - lcong48 ( Index Term Link )
  - lrand48 ( Index Term Link )
  - mrand48 ( Index Term Link )
  - nrand48 ( Index Term Link )
  - rand ( Index Term Link )
  - seed48 ( Index Term Link )
  - srand48 ( Index Term Link )
 
 random number generator, simple
  - rand ( Index Term Link )
  - srand ( Index Term Link )
 
 re_comp - compile and execute regular expressions ( Index Term Link )
 
 re_exec - compile and execute regular expressions ( Index Term Link )
 
 read a string of characters without echo - getpass ( Index Term Link )
 
 read a directory entry - readdir ( Index Term Link )
 
 read a string of characters without echo, - getpassphrase ( Index Term Link )
 
 read directory
  - readdir ( Index Term Link )
  - readdir_r ( Index Term Link )
 
 readdir - read a directory entry ( Index Term Link )
 
 readdir - read directory ( Index Term Link )
  POSIX ( Index Term Link )
 
 readdir_r - read directory ( Index Term Link )
 
 realloc - memory allocator ( Index Term Link )
 
 realpath - resolve pathname ( Index Term Link )
 
 reboot - reboot system or halt processor ( Index Term Link )
 
 regcmp - compile regular expression ( Index Term Link )
 
 regcomp - regular expression matching ( Index Term Link )
 
 regerror - regular expression matching ( Index Term Link )
 
 regex - execute regular expression ( Index Term Link )
 
 regexec - regular expression matching ( Index Term Link )
 
 regfree - regular expression matching ( Index Term Link )
 
 register a function to run at process termination or object unloading- atexit ( Index Term Link )
 
 regular expression matching
  - regcomp ( Index Term Link )
  - regerror ( Index Term Link )
  - regexec ( Index Term Link )
  - regfree ( Index Term Link )
 
 regular expressions, compile and execute - regcmp, regex ( Index Term Link )
 
 remove - remove file ( Index Term Link )
 
 remque - remove elment from a queue ( Index Term Link )
 
 reposition a file-position indicator in a stream
  - fseek ( Index Term Link )
  - fseeko ( Index Term Link )
 
 reset file position indicator in a stream - rewind ( Index Term Link )
 
 reset position of directory stream to the beginning of a directory - rewinddir ( Index Term Link )
 
 resetmnttab - get mnttab file information ( Index Term Link )
 
 resolve pathname - realpath ( Index Term Link )
 
 resource utilization, get information - getrusage ( Index Term Link )
 
 return a file offset for a file descriptor - tell ( Index Term Link )
 
 return a file offset in a stream
  - ftell ( Index Term Link )
  - ftello ( Index Term Link )
 
 return pathname of executable - getexecname ( Index Term Link )
 
 rewind - reset file position indicator in a stream ( Index Term Link )
 
 rewinddir - reset position of directory stream to the beginning of a directory ( Index Term Link )
 
 rindex - string operations ( Index Term Link )