Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
22 lines
450 B
C
22 lines
450 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <sys/select.h>
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#include <unistd.h>
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#include <errno.h>
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int read_with_timeout(int fd, char *buf, size_t count, long usec)
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{
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const long M = 1000 * 1000;
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struct timeval tv = { usec / M, usec % M };
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fd_set fds;
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int err;
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FD_ZERO(&fds);
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FD_SET(fd, &fds);
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err = select(fd + 1, &fds, NULL, NULL, &tv);
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if (err < 0)
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return err;
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if (FD_ISSET(fd, &fds))
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return read(fd, buf, count);
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return -EAGAIN;
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}
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