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 erand48(3) -- pseudo-random number generators and initialization routines
    The rand48() family of functions generates pseudo-random numbers using a linear congruential algorithm working on integers 48 bits in size. The particular formula employed is r(n+1) = (a * r(n) + c) m...
 erase(3) -- clear all or part of a curses window
    The erase and werase routines copy blanks to every position in the window, clearing the screen. The clear and wclear routines are like erase and werase, but they also call clearok, so that the screen ...
 erasechar(3) -- curses environment query routines
    The baudrate routine returns the output speed of the terminal. The number returned is in bits per second, for example 9600, and is an integer. The erasechar routine returns the user's current erase c...
 erf(3) -- error function operators
    These functions calculate the error function of x. The erf() calculates the error function of x, and the erff() function is a single precision version of erf(). The error function is defined as: erf(x...
 erfc(3) -- error function operators
    These functions calculate the error function of x. The erf() calculates the error function of x, and the erff() function is a single precision version of erf(). The error function is defined as: erf(x...
 erfcf(3) -- error function operators
    These functions calculate the error function of x. The erf() calculates the error function of x, and the erff() function is a single precision version of erf(). The error function is defined as: erf(x...
 erff(3) -- error function operators
    These functions calculate the error function of x. The erf() calculates the error function of x, and the erff() function is a single precision version of erf(). The error function is defined as: erf(x...
 err(3) -- formatted error messages
    The err() and warn() family of functions display a formatted error message on the standard error output. In all cases, the last component of the program name, followed by a colon (`:') character and ...
 errx(3) -- formatted error messages
    The err() and warn() family of functions display a formatted error message on the standard error output. In all cases, the last component of the program name, followed by a colon (`:') character and ...
 ERR_add_error_data(3) -- record an error
    ERR_put_error() adds an error code to the thread's error queue. It signals that the error of reason code reason occurred in function func of library lib, in line number line of file. This function is...
 ERR_clear_error(3) -- clear the error queue
    ERR_clear_error() empties the current thread's error queue.
 ERR_error_string(3) -- obtain human-readable error message
    ERR_error_string() generates a human-readable string representing the error code e, and places it at buf. buf must be at least 120 bytes long. If buf is NULL, the error string is placed in a static bu...
 ERR_error_string_n(3) -- obtain human-readable error message
    ERR_error_string() generates a human-readable string representing the error code e, and places it at buf. buf must be at least 120 bytes long. If buf is NULL, the error string is placed in a static bu...
 ERR_free_strings(3) -- load and free error strings
    ERR_load_crypto_strings() registers the error strings for all libcrypto functions. SSL_load_error_strings() does the same, but also registers the libssl error strings. One of these functions should be...
 ERR_func_error_string(3) -- obtain human-readable error message
    ERR_error_string() generates a human-readable string representing the error code e, and places it at buf. buf must be at least 120 bytes long. If buf is NULL, the error string is placed in a static bu...
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