Changes between Version 4 and Version 5 of zzuf/tutorial Tweet

Timestamp:

05/18/2008 12:02:25 PM (17 years ago)

Author:

Sam Hocevar

Comment:

minor updates

zzuf/tutorial

@@ -172 +172 @@
 This is not the expected behaviour at all. What happens exactly? The problem is that `file` also opens its own configuration files to gather information about file formats, and of course `zzuf` fuzzes these files, since no one told it that they were special.
 
-We may use the '''debug mode''' to learn more about what happens, using the '''`-d` flag''':
+We may run `zzuf` in '''debug mode''' to learn more about what happens, using the '''`-d` flag''':
 
 {{{
@@ -255 +255 @@
 {{{
 % zzuf -vc -s 0:5 file /bin/ls
-zzuf[s=0,r=0.004]: launched file
-/bin/ls: data
-zzuf[s=1,r=0.004]: launched file
+zzuf[s=0,r=0.004]: launched `file'
+/bin/ls: data
+zzuf[s=1,r=0.004]: launched `file'
 /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, stripped
-zzuf[s=2,r=0.004]: launched file
+zzuf[s=2,r=0.004]: launched `file'
 /bin/ls: ELF 64-bit LSB executable, x86-64, (SYSV), statically linked (uses shared libs), stripped
-zzuf[s=3,r=0.004]: launched file
+zzuf[s=3,r=0.004]: launched `file'
 /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6.8388616, statically linked (uses shared libs), corrupted section header size
-zzuf[s=4,r=0.004]: launched file
+zzuf[s=4,r=0.004]: launched `file'
 /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked (uses shared libs), stripped
 %
@@ -274 +274 @@
 {{{
 % zzuf -vc -s 0:5 -r 0.0001:0.01 file /bin/ls
-zzuf[s=0,r=0.0001:0.01]: launched file
+zzuf[s=0,r=0.0001:0.01]: launched `file'
 /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6.8, dynamically linked (uses shared libs), stripped
-zzuf[s=1,r=0.0001:0.01]: launched file
+zzuf[s=1,r=0.0001:0.01]: launched `file'
 /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked (uses shared libs), stripped
-zzuf[s=2,r=0.0001:0.01]: launched file
+zzuf[s=2,r=0.0001:0.01]: launched `file'
 /bin/ls: ERROR: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6.8, dynamically linked (uses shared libs)error reading
-zzuf[s=3,r=0.0001:0.01]: launched file
+zzuf[s=3,r=0.0001:0.01]: launched `file'
 /bin/ls: ERROR: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linkedCannot allocate memory for note (Cannot allocate memory)
-zzuf[s=4,r=0.0001:0.01]: launched file
+zzuf[s=4,r=0.0001:0.01]: launched `file'
 /bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, stripped
 %
 }}}
+
+To generate a file that reproduces a given behaviour, the corresponding `-s` flag and the exact same `-r` flag need to be used:
+
+{{{
+% zzuf -s 4 -r 0.0001:0.01 < /bin/ls > output.file
+% file output.file
+output.file: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, stripped
+%
+}}}