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Исправление HighMan, (текущая версия) :

А что сообщает

# strace gpiomon gpiochip0 0
execve("/usr/bin/gpiomon", ["gpiomon", "gpiochip0", "0"], 0x7ffe89c74dd0 /* 38 vars */) = 0
brk(NULL)                               = 0x56168f7f5000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=14573, ...}) = 0
mmap(NULL, 14573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f01766b4000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib64/libgpiod.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0005\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=39584, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01766b2000
mmap(NULL, 41600, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01766a7000
mmap(0x7f01766aa000, 16384, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f01766aa000
mmap(0x7f01766ae000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7f01766ae000
mmap(0x7f01766b0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x7f01766b0000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\200\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1921200, ...}) = 0
mmap(NULL, 1934024, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01764ce000
mprotect(0x7f01764f4000, 1740800, PROT_NONE) = 0
mmap(0x7f01764f4000, 1425408, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x26000) = 0x7f01764f4000
mmap(0x7f0176650000, 311296, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x182000) = 0x7f0176650000
mmap(0x7f017669d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ce000) = 0x7f017669d000
mmap(0x7f01766a3000, 13000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f01766a3000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01764cb000
arch_prctl(ARCH_SET_FS, 0x7f01764cb740) = 0
mprotect(0x7f017669d000, 12288, PROT_READ) = 0
mprotect(0x7f01766b0000, 4096, PROT_READ) = 0
mprotect(0x56168f4bd000, 4096, PROT_READ) = 0
mprotect(0x7f01766e5000, 4096, PROT_READ) = 0
munmap(0x7f01766b4000, 14573)           = 0
rt_sigprocmask(SIG_BLOCK, [INT TERM], NULL, 8) = 0
signalfd4(-1, [INT TERM], 8, 0)         = 3
openat(AT_FDCWD, "/dev", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0755, st_size=3860, ...}) = 0
brk(NULL)                               = 0x56168f7f5000
brk(0x56168f816000)                     = 0x56168f816000
getdents64(4, 0x56168f7f52d0 /* 193 entries */, 32768) = 5632
getdents64(4, 0x56168f7f52d0 /* 0 entries */, 32768) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
ioctl(4, GPIO_GET_LINEINFO_IOCTL, {line_offset=0} => {flags=GPIOLINE_FLAG_KERNEL, name="", consumer="sysfs"}) = 0
ioctl(4, GPIO_GET_LINEEVENT_IOCTL, {lineoffset=0, handleflags=GPIOHANDLE_REQUEST_INPUT, eventflags=GPIOEVENT_REQUEST_BOTH_EDGES, consumer_label="gpiomon"}) = -1 EBUSY (Device or resource busy)
close(4)                                = 0
write(2, "gpiomon: ", 9gpiomon: )                = 9
write(2, "error waiting for events", 24error waiting for events) = 24
write(2, ": Device or resource busy\n", 26: Device or resource busy
) = 26
exit_group(1)                           = ?
+++ exited with 1 +++

Есть еще странность: нет файла /sys/class/gpio/gpio*/edge

Как я смотрел по примерам полинга для sysfs в этот файл записывают ‘rising’.

https://raspberrypi.stackexchange.com/questions/44416/polling-gpio-pin-from-c-always-getting-immediate-response

# ls /sys/class/gpio/gpio*/
/sys/class/gpio/gpio1016/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpio1017/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpio1018/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpio1019/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpio1020/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpio1021/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpio1022/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpio1023/:
active_low  device  direction  power  subsystem  uevent  value

/sys/class/gpio/gpiochip1016/:
base  device  label  ngpio  power  subsystem  uevent

Возможно, я что-то недопонимаю

Исправление HighMan, :

А что сообщает

# strace gpiomon gpiochip0 0
execve("/usr/bin/gpiomon", ["gpiomon", "gpiochip0", "0"], 0x7ffe89c74dd0 /* 38 vars */) = 0
brk(NULL)                               = 0x56168f7f5000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=14573, ...}) = 0
mmap(NULL, 14573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f01766b4000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib64/libgpiod.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0005\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=39584, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01766b2000
mmap(NULL, 41600, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01766a7000
mmap(0x7f01766aa000, 16384, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f01766aa000
mmap(0x7f01766ae000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7f01766ae000
mmap(0x7f01766b0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x7f01766b0000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\200\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1921200, ...}) = 0
mmap(NULL, 1934024, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01764ce000
mprotect(0x7f01764f4000, 1740800, PROT_NONE) = 0
mmap(0x7f01764f4000, 1425408, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x26000) = 0x7f01764f4000
mmap(0x7f0176650000, 311296, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x182000) = 0x7f0176650000
mmap(0x7f017669d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ce000) = 0x7f017669d000
mmap(0x7f01766a3000, 13000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f01766a3000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01764cb000
arch_prctl(ARCH_SET_FS, 0x7f01764cb740) = 0
mprotect(0x7f017669d000, 12288, PROT_READ) = 0
mprotect(0x7f01766b0000, 4096, PROT_READ) = 0
mprotect(0x56168f4bd000, 4096, PROT_READ) = 0
mprotect(0x7f01766e5000, 4096, PROT_READ) = 0
munmap(0x7f01766b4000, 14573)           = 0
rt_sigprocmask(SIG_BLOCK, [INT TERM], NULL, 8) = 0
signalfd4(-1, [INT TERM], 8, 0)         = 3
openat(AT_FDCWD, "/dev", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0755, st_size=3860, ...}) = 0
brk(NULL)                               = 0x56168f7f5000
brk(0x56168f816000)                     = 0x56168f816000
getdents64(4, 0x56168f7f52d0 /* 193 entries */, 32768) = 5632
getdents64(4, 0x56168f7f52d0 /* 0 entries */, 32768) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
ioctl(4, GPIO_GET_LINEINFO_IOCTL, {line_offset=0} => {flags=GPIOLINE_FLAG_KERNEL, name="", consumer="sysfs"}) = 0
ioctl(4, GPIO_GET_LINEEVENT_IOCTL, {lineoffset=0, handleflags=GPIOHANDLE_REQUEST_INPUT, eventflags=GPIOEVENT_REQUEST_BOTH_EDGES, consumer_label="gpiomon"}) = -1 EBUSY (Device or resource busy)
close(4)                                = 0
write(2, "gpiomon: ", 9gpiomon: )                = 9
write(2, "error waiting for events", 24error waiting for events) = 24
write(2, ": Device or resource busy\n", 26: Device or resource busy
) = 26
exit_group(1)                           = ?
+++ exited with 1 +++

Есть еще странность: нет файла /sys/class/gpio/gpio*/edge

Как я смотрел по примерам полинга для sysfs в этот файл записывают ‘rising’.

https://raspberrypi.stackexchange.com/questions/44416/polling-gpio-pin-from-c-always-getting-immediate-response

Возможно, я что-то недопонимаю

Исправление HighMan, :

А что сообщает

# strace gpiomon gpiochip0 0
execve("/usr/bin/gpiomon", ["gpiomon", "gpiochip0", "0"], 0x7ffe89c74dd0 /* 38 vars */) = 0
brk(NULL)                               = 0x56168f7f5000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=14573, ...}) = 0
mmap(NULL, 14573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f01766b4000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib64/libgpiod.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0005\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=39584, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01766b2000
mmap(NULL, 41600, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01766a7000
mmap(0x7f01766aa000, 16384, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f01766aa000
mmap(0x7f01766ae000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7f01766ae000
mmap(0x7f01766b0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x7f01766b0000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\200\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1921200, ...}) = 0
mmap(NULL, 1934024, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01764ce000
mprotect(0x7f01764f4000, 1740800, PROT_NONE) = 0
mmap(0x7f01764f4000, 1425408, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x26000) = 0x7f01764f4000
mmap(0x7f0176650000, 311296, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x182000) = 0x7f0176650000
mmap(0x7f017669d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ce000) = 0x7f017669d000
mmap(0x7f01766a3000, 13000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f01766a3000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01764cb000
arch_prctl(ARCH_SET_FS, 0x7f01764cb740) = 0
mprotect(0x7f017669d000, 12288, PROT_READ) = 0
mprotect(0x7f01766b0000, 4096, PROT_READ) = 0
mprotect(0x56168f4bd000, 4096, PROT_READ) = 0
mprotect(0x7f01766e5000, 4096, PROT_READ) = 0
munmap(0x7f01766b4000, 14573)           = 0
rt_sigprocmask(SIG_BLOCK, [INT TERM], NULL, 8) = 0
signalfd4(-1, [INT TERM], 8, 0)         = 3
openat(AT_FDCWD, "/dev", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0755, st_size=3860, ...}) = 0
brk(NULL)                               = 0x56168f7f5000
brk(0x56168f816000)                     = 0x56168f816000
getdents64(4, 0x56168f7f52d0 /* 193 entries */, 32768) = 5632
getdents64(4, 0x56168f7f52d0 /* 0 entries */, 32768) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
ioctl(4, GPIO_GET_LINEINFO_IOCTL, {line_offset=0} => {flags=GPIOLINE_FLAG_KERNEL, name="", consumer="sysfs"}) = 0
ioctl(4, GPIO_GET_LINEEVENT_IOCTL, {lineoffset=0, handleflags=GPIOHANDLE_REQUEST_INPUT, eventflags=GPIOEVENT_REQUEST_BOTH_EDGES, consumer_label="gpiomon"}) = -1 EBUSY (Device or resource busy)
close(4)                                = 0
write(2, "gpiomon: ", 9gpiomon: )                = 9
write(2, "error waiting for events", 24error waiting for events) = 24
write(2, ": Device or resource busy\n", 26: Device or resource busy
) = 26
exit_group(1)                           = ?
+++ exited with 1 +++

Есть еще странность: нет файла /sys/class/gpio/gpio*/edge

Как я смотрел по примерам полинга для sysfs в этот файл записывают ‘rising’.

Возможно, я что-то недопонимаю

Исходная версия HighMan, :

А что сообщает

# strace gpiomon gpiochip0 0
execve("/usr/bin/gpiomon", ["gpiomon", "gpiochip0", "0"], 0x7ffe89c74dd0 /* 38 vars */) = 0
brk(NULL)                               = 0x56168f7f5000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=14573, ...}) = 0
mmap(NULL, 14573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f01766b4000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib64/libgpiod.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0005\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=39584, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01766b2000
mmap(NULL, 41600, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01766a7000
mmap(0x7f01766aa000, 16384, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f01766aa000
mmap(0x7f01766ae000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) = 0x7f01766ae000
mmap(0x7f01766b0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x8000) = 0x7f01766b0000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\200\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1921200, ...}) = 0
mmap(NULL, 1934024, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f01764ce000
mprotect(0x7f01764f4000, 1740800, PROT_NONE) = 0
mmap(0x7f01764f4000, 1425408, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x26000) = 0x7f01764f4000
mmap(0x7f0176650000, 311296, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x182000) = 0x7f0176650000
mmap(0x7f017669d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ce000) = 0x7f017669d000
mmap(0x7f01766a3000, 13000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f01766a3000
close(3)                                = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f01764cb000
arch_prctl(ARCH_SET_FS, 0x7f01764cb740) = 0
mprotect(0x7f017669d000, 12288, PROT_READ) = 0
mprotect(0x7f01766b0000, 4096, PROT_READ) = 0
mprotect(0x56168f4bd000, 4096, PROT_READ) = 0
mprotect(0x7f01766e5000, 4096, PROT_READ) = 0
munmap(0x7f01766b4000, 14573)           = 0
rt_sigprocmask(SIG_BLOCK, [INT TERM], NULL, 8) = 0
signalfd4(-1, [INT TERM], 8, 0)         = 3
openat(AT_FDCWD, "/dev", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
fstat(4, {st_mode=S_IFDIR|0755, st_size=3860, ...}) = 0
brk(NULL)                               = 0x56168f7f5000
brk(0x56168f816000)                     = 0x56168f816000
getdents64(4, 0x56168f7f52d0 /* 193 entries */, 32768) = 5632
getdents64(4, 0x56168f7f52d0 /* 0 entries */, 32768) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
close(4)                                = 0
openat(AT_FDCWD, "/dev/gpiochip0", O_RDWR|O_CLOEXEC) = 4
lstat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
stat("/dev/gpiochip0", {st_mode=S_IFCHR|0600, st_rdev=makedev(0xfe, 0), ...}) = 0
access("/sys/bus/gpio/devices/gpiochip0/dev", R_OK) = 0
openat(AT_FDCWD, "/sys/bus/gpio/devices/gpiochip0/dev", O_RDONLY) = 5
read(5, "254:0\n", 15)                  = 6
close(5)                                = 0
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, {name="gpiochip0", label="gpio-kempld", lines=8}) = 0
ioctl(4, GPIO_GET_LINEINFO_IOCTL, {line_offset=0} => {flags=GPIOLINE_FLAG_KERNEL, name="", consumer="sysfs"}) = 0
ioctl(4, GPIO_GET_LINEEVENT_IOCTL, {lineoffset=0, handleflags=GPIOHANDLE_REQUEST_INPUT, eventflags=GPIOEVENT_REQUEST_BOTH_EDGES, consumer_label="gpiomon"}) = -1 EBUSY (Device or resource busy)
close(4)                                = 0
write(2, "gpiomon: ", 9gpiomon: )                = 9
write(2, "error waiting for events", 24error waiting for events) = 24
write(2, ": Device or resource busy\n", 26: Device or resource busy
) = 26
exit_group(1)                           = ?
+++ exited with 1 +++