03-24-2014
The way you're using strcpy is incorrect. Neither char *script nor char *text point to properly allocated memory. Instead, they are uninitialized and pointing to arbitrary locations. You may get lucky, or you may segfault.
char *content points to 1000 bytes, but the code does not prevent a long reminder from overflowing the buffer. In this case, you could get the job done with a single fprintf. Why construct a string in a buffer when you can write the text directly to the stream?
Using atoi in new code is asking for trouble, since it does not perform any type of error checking.
The -k start|stop switch is redundant with the presence of -t. You can set all of the appropriate (int) flags based on the presence or absence of -t.
I did not try to compile the program. I only skimmed the code. There may be other issues lurking. If you haven't done so, enable all of your compilers warnings.
Regards,
Alister
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LEARN ABOUT OPENDARWIN
err_error_string
ERR_error_string(3) OpenSSL ERR_error_string(3)
NAME
ERR_error_string, ERR_error_string_n, ERR_lib_error_string, ERR_func_error_string, ERR_reason_error_string - obtain human-readable error
message
SYNOPSIS
#include <openssl/err.h>
char *ERR_error_string(unsigned long e, char *buf);
char *ERR_error_string_n(unsigned long e, char *buf, size_t len);
const char *ERR_lib_error_string(unsigned long e);
const char *ERR_func_error_string(unsigned long e);
const char *ERR_reason_error_string(unsigned long e);
DESCRIPTION
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 buffer. ERR_error_string_n() is a variant of ERR_error_string() that writes
at most len characters (including the terminating 0) and truncates the string if necessary. For ERR_error_string_n(), buf may not be NULL.
The string will have the following format:
error:[error code]:[library name]:[function name]:[reason string]
error code is an 8 digit hexadecimal number, library name, function name and reason string are ASCII text.
ERR_lib_error_string(), ERR_func_error_string() and ERR_reason_error_string() return the library name, function name and reason string
respectively.
The OpenSSL error strings should be loaded by calling ERR_load_crypto_strings(3) or, for SSL applications, SSL_load_error_strings(3) first.
If there is no text string registered for the given error code, the error string will contain the numeric code.
ERR_print_errors(3) can be used to print all error codes currently in the queue.
RETURN VALUES
ERR_error_string() returns a pointer to a static buffer containing the string if buf == NULL, buf otherwise.
ERR_lib_error_string(), ERR_func_error_string() and ERR_reason_error_string() return the strings, and NULL if none is registered for the
error code.
SEE ALSO
err(3), ERR_get_error(3), ERR_load_crypto_strings(3), SSL_load_error_strings(3) ERR_print_errors(3)
HISTORY
ERR_error_string() is available in all versions of SSLeay and OpenSSL. ERR_error_string_n() was added in OpenSSL 0.9.6.
0.9.7d 2002-04-30 ERR_error_string(3)