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C

• COLOR_PAIRS, COLORS - external variables for colour support
• COLS - number of columns on terminal screen
• c89 - compile standard C programs
• cal - print a calendar
• calendar - reminder service (LEGACY)
• calloc - a memory allocator
• can_change_color, color_content, has_colors, init_color, init_pair,
• cancel - cancel printer requests (LEGACY)
• cat - concatenate and print files
• catclose - close a message catalogue descriptor
• catgets - read a program message
• catopen - open a message catalogue
• cbreak, nocbreak, noraw, raw - input mode control functions
• cbrt - cube root function
• cc - a C-language compilation system (LEGACY)
• cd - change the working directory
• ceil - ceiling value function
• cfgetispeed - get input baud rate
• cfgetospeed - get output baud rate
• cflow - generate a C-language flowgraph (DEVELOPMENT)
• cfsetispeed - set input baud rate
• cfsetospeed - set output baud rate
• chdir - change working directory
• chgat, mvchgat, mvwchgat, wchgat - change renditions of characters in a window
• chgrp - change the file group ownership
• chmod - change mode of a file
• chmod - change the file modes
• chown - change owner and group of a file
• chown - change the file ownership
• chroot - change root directory
• cksum - write file checksums and sizes
• clear, erase, wclear, werase - clear a window
• clearerr - clear indicators on a stream
• clearok, idlok, leaveok, scrollok, setscrreg,
• clock - report CPU time used
• clock_settime, clock_gettime, clock_getres - clock and timer functions
• close - close a file descriptor
• closedir - close a directory stream
• closelog, openlog, setlogmask, syslog - control system log
• clrtobot, wclrtobot - clear from cursor to end of window
• clrtoeol, wclrtoeol - clear from cursor to end of line
• cmp - compare two files
• col - filter reverse line-feeds (LEGACY)
• colon - Null Utility (Shell Built-in)
• color_content - identify red, green and blue intensity of a colour
• comm - select or reject lines common to two files
• command - execute a simple command
• compile - produce a compiled regular expression
• compress - compress data
• confstr - get configurable variables
• connect - connect a socket
• continue - Continue for, while or until Loop (Shell Built-in)
• copywin - copy a region of a window
• cos - cosine function
• cosh - hyperbolic cosine function
• cp - copy files
• cpio - copy file archives in and out (LEGACY)
• cpio.h - cpio archive values
• creat - create a new file or rewrite an existing one
• crontab - schedule periodic background work
• crypt - string encoding function
• csplit - split files based on context
• ctags - create a tags file (DEVELOPMENT, FORTRAN)
• ctermid - generate a pathname for controlling terminal
• ctime, ctime_r - convert a time value to date and time string
• ctype.h - character types
• cu - call another system (LEGACY)
• cur_term - current terminal information
• curs_set - set the cursor mode
• curscr - current window
• curses.h - definitions for screen handling and optimisation functions
• cuserid - character login name of the user
• cut - cut out selected fields of each line of a file
• cxref - generate a C-language program cross-reference table

• carriage-return character
• character
• character array
• character class
• character set
• Character Set
• Character Encoding
• Character Set Description File
• character special file
• character string
• child process
• circumflex
• clock
• clock tick
• coded character set
• codeset
• collating element
• collation
• collation sequence
• column position
• command
• command language interpreter
• composite graphic symbol
• condition variable
• control character
• control operator
• controlling process
• controlling terminal
• conversion descriptor
• core file
• current working directory
• Curses Interface Overview
• cursor position