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synced 2025-12-27 07:35:36 -05:00
59546e8744
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>
59 lines
1006 B
C
59 lines
1006 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#if !defined(__NET_KSFT_H__)
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#define __NET_KSFT_H__
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static inline void ksft_ready(void)
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{
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const char msg[7] = "ready\n";
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char *env_str;
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int fd;
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env_str = getenv("KSFT_READY_FD");
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if (env_str) {
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fd = atoi(env_str);
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if (!fd) {
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fprintf(stderr, "invalid KSFT_READY_FD = '%s'\n",
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env_str);
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return;
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}
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} else {
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fd = STDOUT_FILENO;
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}
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if (write(fd, msg, sizeof(msg)) < 0)
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perror("write()");
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if (fd != STDOUT_FILENO)
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close(fd);
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}
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static inline void ksft_wait(void)
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{
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char *env_str;
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char byte;
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int fd;
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env_str = getenv("KSFT_WAIT_FD");
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if (env_str) {
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fd = atoi(env_str);
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if (!fd) {
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fprintf(stderr, "invalid KSFT_WAIT_FD = '%s'\n",
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env_str);
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return;
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}
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} else {
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/* Not running in KSFT env, wait for input from STDIN instead */
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fd = STDIN_FILENO;
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}
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if (read(fd, &byte, sizeof(byte)) < 0)
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perror("read()");
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if (fd != STDIN_FILENO)
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close(fd);
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}
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#endif
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