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normalize example exit status

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Use EXIT_SUCCESS / EXIT_FAILURE in most cases as more granularity isn't
useful. For anim_diff, use 0 (success), 1 (image difference) and 2
(error) to align it with other diff utilities (diff, etc.).

Bug: webp:637
Change-Id: I52925de8622a5a4d2141883279d69a1d95ef9b12
This commit is contained in:
James Zern
2024-04-30 18:18:23 -07:00
parent edc289092a
commit a67ff735a2
19 changed files with 139 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
man/cwebp.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH CWEBP 1 "March 26, 2024"
.TH CWEBP 1 "April 30, 2024"
.SH NAME
cwebp \- compress an image file to a WebP file
.SH SYNOPSIS
@@ -299,6 +299,13 @@ Note: each input format may not support all combinations.
.B \-noasm
Disable all assembly optimizations.
.SH EXIT STATUS
If there were no problems during execution, \fBcwebp\fP exits with the value of
the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBcwebp\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH BUGS
Please report all bugs to the issue tracker:
https://bugs.chromium.org/p/webp

9
man/dwebp.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH DWEBP 1 "November 17, 2021"
.TH DWEBP 1 "April 30, 2024"
.SH NAME
dwebp \- decompress a WebP file to an image file
.SH SYNOPSIS
@@ -108,6 +108,13 @@ Print extra information (decoding time in particular).
.B \-noasm
Disable all assembly optimizations.
.SH EXIT STATUS
If there were no problems during execution, \fBdwebp\fP exits with the value of
the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBdwebp\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH BUGS
Please report all bugs to the issue tracker:
https://bugs.chromium.org/p/webp

9
man/gif2webp.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH GIF2WEBP 1 "November 17, 2021"
.TH GIF2WEBP 1 "April 30, 2024"
.SH NAME
gif2webp \- Convert a GIF image to WebP
.SH SYNOPSIS
@@ -126,6 +126,13 @@ Print extra information.
.B \-quiet
Do not print anything.
.SH EXIT STATUS
If there were no problems during execution, \fBgif2webp\fP exits with the value
of the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBgif2webp\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH BUGS
Please report all bugs to the issue tracker:
https://bugs.chromium.org/p/webp

9
man/img2webp.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH IMG2WEBP 1 "March 17, 2023"
.TH IMG2WEBP 1 "April 30, 2024"
.SH NAME
img2webp \- create animated WebP file from a sequence of input images.
.SH SYNOPSIS
@@ -89,6 +89,13 @@ Specify the compression method to use. This parameter controls the
trade off between encoding speed and the compressed file size and quality.
Possible values range from 0 to 6. Default value is 4.
.SH EXIT STATUS
If there were no problems during execution, \fBimg2webp\fP exits with the value
of the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBimg2webp\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH EXAMPLE
img2webp -loop 2 in0.png -lossy in1.jpg -d 80 in2.tiff -o out.webp
.br

9
man/vwebp.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH VWEBP 1 "November 17, 2021"
.TH VWEBP 1 "April 30, 2024"
.SH NAME
vwebp \- decompress a WebP file and display it in a window
.SH SYNOPSIS
@@ -72,6 +72,13 @@ Disable blending and disposal process, for debugging purposes.
.B 'q' / 'Q' / ESC
Quit.
.SH EXIT STATUS
If there were no problems during execution, \fBvwebp\fP exits with the value of
the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBvwebp\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH BUGS
Please report all bugs to the issue tracker:
https://bugs.chromium.org/p/webp

9
man/webpinfo.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH WEBPINFO 1 "November 17, 2021"
.TH WEBPINFO 1 "April 30, 2024"
.SH NAME
webpinfo \- print out the chunk level structure of WebP files
along with basic integrity checks.
@@ -47,6 +47,13 @@ Detailed usage instructions.
Input files in WebP format. Input files must come last, following
options (if any). There can be multiple input files.
.SH EXIT STATUS
If there were no problems during execution, \fBwebpinfo\fP exits with the value
of the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBwebpinfo\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH BUGS
Please report all bugs to the issue tracker:
https://bugs.chromium.org/p/webp

9
man/webpmux.1
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@@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH WEBPMUX 1 "November 17, 2021"
.TH WEBPMUX 1 "April 30, 2024"
.SH NAME
webpmux \- create animated WebP files from non\-animated WebP images, extract
frames from animated WebP images, and manage XMP/EXIF metadata and ICC profile.
@@ -186,6 +186,13 @@ Output file in WebP format.
.TP
The nature of EXIF, XMP and ICC data is not checked and is assumed to be valid.
.SH EXIT STATUS
If there were no problems during execution, \fBwebpmux\fP exits with the value
of the C constant \fBEXIT_SUCCESS\fP. This is usually zero.
.PP
If an error occurs, \fBwebpmux\fP exits with the value of the C constant
\fBEXIT_FAILURE\fP. This is usually one.
.SH BUGS
Please report all bugs to the issue tracker:
https://bugs.chromium.org/p/webp