OS/161 C Standard Library (libc)

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• __vprintf - printf backend
• abort - abnormal program termination
• assert - check assumptions at run time
• atoi - convert ascii to integer
• bzero - zero out memory
• calloc - allocate and clear memory
• err, errx - print error messages
• exit - terminate program
• free - release/deallocate memory
• getchar - read character from standard input
• getcwd - get name of current working directory
• longjmp - non-local jump operations
• malloc - allocate memory
• memcpy - copy region of memory
• memmove - copy region of memory
• memset - initialize region of memory
• printf - print formatted output
• putchar - print character to standard output
• puts - print string to standard output
• random - pseudorandom number generation
• realloc - resize allocated memory
• setjmp - non-local jump operations
• snprintf - print formatted text to string
• stdarg - handle functions with variable arguments
• strcat - concatenate strings
• strchr - search string for character
• strcmp - compare strings
• strcpy - copy string
• strerror - get error message for error code
• strlen - determine length of string
• strrchr - search string for character
• strtok - tokenize string
• strtok_r - tokenize string reentrantly
• system - run command as subprocess
• time - get time of day
• verr, verrx - print error messages
• vprintf - print formatted output
• vsnprintf - print formatted text to string
• vwarn, vwarnx - print warning messages
• warn, warnx - print warning messages