Hi! I have added a duffman(1) program (script) to the Linux man-pages repo. It is similar to diffman(1), but it diffs the git working directory (or a commit, if specified).
Here are a couple of examples.
A change in the working directory:
alx@devuan:~/src/linux/man-pages/man-pages/contrib$ git diff
diff --git i/man/man3/printf.3 w/man/man3/printf.3
index 2129e26dc..a379ae609 100644
--- i/man/man3/printf.3
+++ w/man/man3/printf.3
@@ -24,7 +24,7 @@ .SH SYNOPSIS
.nf
.B #include <stdio.h>
.P
-.BI "int printf(const char *restrict " format ", ...);"
+.BI "int foo(const char *restrict " format ", ...);"
.BI "int fprintf(FILE *restrict " stream ,
.BI " const char *restrict " format ", ...);"
.BI "int dprintf(int " fd ,
alx@devuan:~/src/linux/man-pages/man-pages/contrib$ duffman
--- HEAD:man/man3/printf.3
+++ man/man3/printf.3
@@ -10,7 +10,7 @@
SYNOPSIS
#include <stdio.h>
- int printf(const char *restrict format, ...);
+ int foo(const char *restrict format, ...);
int fprintf(FILE *restrict stream,
const char *restrict format, ...);
int dprintf(int fd,
(The actual output includes bold and italics.)
And with an old commit:
alx@devuan:~/src/linux/man-pages/man-pages/contrib$ git show
437e4afec6ca
commit 437e4afec6cae16ba75587f835acee1e251f2e75
Author: Alejandro Colomar <a...@kernel.org>
Date: Sun Jan 5 13:44:32 2025 +0100
man/man3/sem_open.3: SYNOPSIS: This is a variadic function
Specify the prototype consistently with open(2).
Signed-off-by: Alejandro Colomar <a...@kernel.org>
diff --git a/man/man3/sem_open.3 b/man/man3/sem_open.3
index 6a2aceb50..35275a024 100644
--- a/man/man3/sem_open.3
+++ b/man/man3/sem_open.3
@@ -15,9 +15,8 @@ .SH SYNOPSIS
.BR "#include <sys/stat.h>" " /* For mode constants */"
.B #include <semaphore.h>
.P
-.BI "sem_t *sem_open(const char *" name ", int " oflag );
-.BI "sem_t *sem_open(const char *" name ", int " oflag ,
-.BI " mode_t " mode ", unsigned int " value );
+.BI "sem_t *sem_open(const char *" name ", int " oflag ", ..."
+.BI " \fR/*\fP mode_t " mode ", unsigned int " value "
\fR*/\fP );"
.fi
.SH DESCRIPTION
.BR sem_open ()
alx@devuan:~/src/linux/man-pages/man-pages/contrib$ duffman 437e4afec6ca
--- 437e4afec6ca^:man/man3/sem_open.3
+++ 437e4afec6ca:man/man3/sem_open.3
@@ -11,9 +11,8 @@
#include <sys/stat.h> /* For mode constants */
#include <semaphore.h>
- sem_t *sem_open(const char *name, int oflag);
- sem_t *sem_open(const char *name, int oflag,
- mode_t mode, unsigned int value);
+ sem_t *sem_open(const char *name, int oflag, ...
+ /* mode_t mode, unsigned int value */ );
DESCRIPTION
sem_open() creates a new POSIX semaphore or opens an existing
semaphore.
I found this very useful for reviewing changes. Maybe you do too. :)
Have a lovely day!
Alex
--
<https://www.alejandro-colomar.es/>
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