TRACE_PUTS(9) Driver Basics TRACE_PUTS(9)NAME
trace_puts - write a string into the ftrace buffer
SYNOPSIS
trace_puts(str);
ARGUMENTS
str
the string to record
NOTE
__trace_bputs is an internal function for trace_puts and the ip is passed in via the trace_puts macro.
This is similar to trace_printk but is made for those really fast paths that a developer wants the least amount of "Heisenbug" affects,
where the processing of the print format is still too much.
This function allows a kernel developer to debug fast path sections that printk is not appropriate for. By scattering in various printk
like tracing in the code, a developer can quickly see where problems are occurring.
This is intended as a debugging tool for the developer only. Please refrain from leaving trace_puts scattered around in your code. (Extra
memory is used for special buffers that are allocated when trace_puts is used)
RETURNS
0 if nothing was written, positive # if string was. (1 when __trace_bputs is used, strlen(str) when __trace_puts is used)
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 TRACE_PUTS(9)
Check Out this Related Man Page
MD5(3) 1 MD5(3)md5 - Calculate the md5 hash of a stringSYNOPSIS
string md5 (string $str, [bool $raw_output = false])
DESCRIPTION
Calculates the MD5 hash of $str using the RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash.
PARAMETERS
o $str
- The string.
o $raw_output
- If the optional $raw_output is set to TRUE, then the md5 digest is instead returned in raw binary format with a length of 16.
RETURN VALUES
Returns the hash as a 32-character hexadecimal number.
EXAMPLES
Example #1
A md5(3) example
<?php
$str = 'apple';
if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') {
echo "Would you like a green or red apple?";
}
?>
NOTES
Note
Secure password hashing
It is not recommended to use this function to secure passwords, due to the fast nature of this hashing algorithm. See here for
details.
SEE ALSO md5_file(3), sha1_file(3), crc32(3), sha1(3), hash(3), crypt(3), password_hash(3).
PHP Documentation Group MD5(3)
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