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selftests: net: Fix build warnings

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Fix

ksft.h: In function ‘ksft_ready’:
ksft.h:27:9: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’

ksft.h: In function ‘ksft_wait’:
ksft.h:51:9: warning: ignoring return value of ‘read’ declared with attribute ‘warn_unused_result’

by checking the return value of the affected functions and displaying
an error message if an error is seen.

Fixes: 2b6d490b82 ("selftests: drv-net: Factor out ksft C helpers")
Cc: Joe Damato <jdamato@fastly.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://patch.msgid.link/20251205171010.515236-11-linux@roeck-us.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Guenter Roeck
2025-12-05 09:10:04 -08:00
committed by Jakub Kicinski
parent 06f7cae92f
commit 59546e8744
1 changed files with 4 additions and 2 deletions
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6
tools/testing/selftests/net/lib/ksft.h
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@@ -24,7 +24,8 @@ static inline void ksft_ready(void)
fd = STDOUT_FILENO;
}
write(fd, msg, sizeof(msg));
if (write(fd, msg, sizeof(msg)) < 0)
perror("write()");
if (fd != STDOUT_FILENO)
close(fd);
}
@@ -48,7 +49,8 @@ static inline void ksft_wait(void)
fd = STDIN_FILENO;
}
read(fd, &byte, sizeof(byte));
if (read(fd, &byte, sizeof(byte)) < 0)
perror("read()");
if (fd != STDIN_FILENO)
close(fd);
}