strace guix pull

rie@apex ~$ sudo strace -f -p $(pgrep guix-daemon)
Password:
strace: Process 241 attached
select(4, [3], NULL, NULL, NULL)        = 1 (in [3])
accept(3, {sa_family=AF_UNIX}, [128->2]) = 4
fcntl(4, F_GETFD)                       = 0
fcntl(4, F_SETFD, FD_CLOEXEC)           = 0
setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = -1 EOPNOTSUPP (Operation not supported)
setsockopt(4, SOL_TCP, TCP_QUICKACK, [1], 4) = -1 EOPNOTSUPP (Operation not supported)
getsockopt(4, SOL_SOCKET, SO_PEERCRED, {pid=6856, uid=1000, gid=998}, [12]) = 0
openat(AT_FDCWD, "/etc/passwd", O_RDONLY|O_CLOEXEC) = 5
lseek(5, 0, SEEK_CUR)                   = 0
fstat(5, {st_mode=S_IFREG|0644, st_size=1884, ...}) = 0
read(5, "root:x:0:0::/root:/gnu/store/n1c"..., 4096) = 1884
close(5)                                = 0
write(2, "accepted connection from pid 685"..., 44) = 44
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDstrace: Process 6860 attached
, child_tidptr=0x7fdcdb476e50) = 6860
[pid   241] close(4)                    = 0
[pid   241] select(4, [3], NULL, NULL, NULL <unfinished ...>
[pid  6860] set_robust_list(0x7fdcdb476e60, 24) = 0
[pid  6860] close(3)                    = 0
[pid  6860] setsid()                    = 6860
[pid  6860] rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, {sa_handler=0x408af0, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, 8) = 0
[pid  6860] rt_sigaction(SIGIO, {sa_handler=SIG_IGN, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
[pid  6860] getpid()                    = 6860
[pid  6860] fcntl(4, F_SETOWN, 6860)    = 0
[pid  6860] fcntl(4, F_GETFL)           = 0x2 (flags O_RDWR)
[pid  6860] fcntl(4, F_SETFL, O_RDWR|FASYNC) = 0
[pid  6860] read(4, "cxin\0\0\0\0", 32768) = 8
[pid  6860] write(4, "oixd\0\0\0\0c\1\0\0\0\0\0\0", 16) = 16
[pid  6860] --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
[pid  6860] --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
[pid  6860] read(4, "c\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\0\0\0\0", 32768) = 24
[pid  6860] rt_sigaction(SIGIO, {sa_handler=0x40a370, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, {sa_handler=SIG_IGN, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, 8) = 0
[pid  6860] select(5, [4], NULL, NULL, {tv_sec=0, tv_usec=0}) = 0 (Timeout)
[pid  6860] lstat("/gnu/store", {st_mode=S_IFDIR|S_ISVTX|0775, st_size=323584, ...}) = 0
[pid  6860] getuid()                    = 0
[pid  6860] statfs("/gnu/store", {f_type=EXT2_SUPER_MAGIC, f_bsize=4096, f_blocks=58867178, f_bfree=57979625, f_bavail=54971907, f_files=15024128, f_ffree=14917786, f_fsid={val=[1376269339, 127665827]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RDONLY|ST_RELATIME}) = 0
[pid  6860] unshare(CLONE_NEWNS)        = 0
[pid  6860] mount(NULL, "/gnu/store", 0x492302, MS_REMOUNT|MS_BIND, NULL) = 0
[pid  6860] lstat("/gnu/store/.links", {st_mode=S_IFDIR|0755, st_size=7499776, ...}) = 0
[pid  6860] lstat("/var/guix/profiles", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid  6860] lstat("/var/guix/temproots", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid  6860] lstat("/var/guix/db", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid  6860] statx(AT_FDCWD, "/var/guix/gcroots", AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, 0, {stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=4096, ...}) = 0
[pid  6860] getuid()                    = 0
[pid  6860] lstat("/var/guix/profiles/per-user", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid  6860] chmod("/var/guix/profiles/per-user", 0755) = 0
[pid  6860] socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
[pid  6860] connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = 0
[pid  6860] sendto(3, "\2\0\0\0\f\0\0\0\6\0\0\0group\0", 18, MSG_NOSIGNAL, NULL, 0) = 18
[pid  6860] poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3, revents=POLLIN|POLLHUP}])
[pid  6860] recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="", iov_len=6}, {iov_base="", iov_len=8}], msg_iovlen=2, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 0
[pid  6860] close(3)                    = 0
[pid  6860] socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
[pid  6860] connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = 0
[pid  6860] sendto(3, "\2\0\0\0\2\0\0\0\n\0\0\0guixbuild\0", 22, MSG_NOSIGNAL, NULL, 0) = 22
[pid  6860] poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3, revents=POLLIN|POLLHUP}])
[pid  6860] read(3, "\2\0\0\0\377\377\377\377\0\0\0\0\0\0\0\0\377\377\377\377\0\0\0\0", 24) = 24
[pid  6860] close(3)                    = 0
[pid  6860] openat(AT_FDCWD, "/etc/group", O_RDONLY|O_CLOEXEC) = 3
[pid  6860] lseek(3, 0, SEEK_CUR)       = 0
[pid  6860] fstat(3, {st_mode=S_IFREG|0644, st_size=568, ...}) = 0
[pid  6860] read(3, "root:x:0:\nwheel:x:999:rie\nusers:"..., 4096) = 568
[pid  6860] close(3)                    = 0
[pid  6860] stat("/gnu/store", {st_mode=S_IFDIR|S_ISVTX|0775, st_size=323584, ...}) = 0
[pid  6860] lstat("/gnu/store", {st_mode=S_IFDIR|S_ISVTX|0775, st_size=323584, ...}) = 0
[pid  6860] lstat("/gnu", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid  6860] stat("/var/guix/db/reserved", {st_mode=S_IFREG|0600, st_size=8388608, ...}) = 0
[pid  6860] openat(AT_FDCWD, "/var/guix/db/big-lock", O_RDWR|O_CREAT, 0600) = 3
[pid  6860] fcntl(3, F_GETFD)           = 0
[pid  6860] fcntl(3, F_SETFD, FD_CLOEXEC) = 0
[pid  6860] fcntl(3, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
[pid  6860] statx(AT_FDCWD, "/var/guix/db/schema", AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, 0, {stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=1, ...}) = 0
[pid  6860] openat(AT_FDCWD, "/var/guix/db/schema", O_RDONLY) = 5
[pid  6860] fstat(5, {st_mode=S_IFREG|0644, st_size=1, ...}) = 0
[pid  6860] read(5, "7", 1)             = 1
[pid  6860] close(5)                    = 0
[pid  6860] access("/var/guix/db", R_OK|W_OK) = 0
[pid  6860] lstat("/var/guix/db/db.sqlite", {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] getpid()                    = 6860
[pid  6860] getpid()                    = 6860
[pid  6860] openat(AT_FDCWD, "/var/guix/db/db.sqlite", O_RDWR|O_CLOEXEC) = 5
[pid  6860] fstat(5, {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] fstat(5, {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] stat("/var/guix/db/db.sqlite", {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] lseek(5, 0, SEEK_SET)       = 0
[pid  6860] read(5, "SQLite format 3\0\20\0\2\2\0@  \0\0\0(\0\0\2h"..., 100) = 100
[pid  6860] brk(0x6d2000)               = 0x6d2000
[pid  6860] fcntl(5, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = 0
[pid  6860] fcntl(5, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741826, l_len=510}) = 0
[pid  6860] fcntl(5, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = 0
[pid  6860] stat("/var/guix/db/db.sqlite-journal", 0x7ffe74731110) = -1 ENOENT (No such file or directory)
[pid  6860] stat("/var/guix/db/db.sqlite-wal", 0x7ffe74731110) = -1 ENOENT (No such file or directory)
[pid  6860] fstat(5, {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] lseek(5, 0, SEEK_SET)       = 0
[pid  6860] read(5, "SQLite format 3\0\20\0\2\2\0@  \0\0\0(\0\0\2h"..., 4096) = 4096
[pid  6860] getpid()                    = 6860
[pid  6860] stat("/var/guix/db/db.sqlite", {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] openat(AT_FDCWD, "/var/guix/db/db.sqlite-wal", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 6
[pid  6860] fstat(6, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
[pid  6860] geteuid()                   = 0
[pid  6860] fchown(6, 0, 0)             = 0
[pid  6860] fstat(5, {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] openat(AT_FDCWD, "/var/guix/db/db.sqlite-shm", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 7
[pid  6860] fstat(7, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
[pid  6860] geteuid()                   = 0
[pid  6860] fchown(7, 0, 0)             = 0
[pid  6860] fcntl(7, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=128, l_len=1, l_pid=0}) = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=128, l_len=1}) = 0
[pid  6860] ftruncate(7, 3)             = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=128, l_len=1}) = 0
[pid  6860] fstat(7, {st_mode=S_IFREG|0644, st_size=3, ...}) = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=120, l_len=1}) = 0
[pid  6860] fstat(7, {st_mode=S_IFREG|0644, st_size=3, ...}) = 0
[pid  6860] lseek(7, 4095, SEEK_SET)    = 4095
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] lseek(7, 8191, SEEK_SET)    = 8191
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] lseek(7, 12287, SEEK_SET)   = 12287
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] lseek(7, 16383, SEEK_SET)   = 16383
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] lseek(7, 20479, SEEK_SET)   = 20479
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] lseek(7, 24575, SEEK_SET)   = 24575
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] lseek(7, 28671, SEEK_SET)   = 28671
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] lseek(7, 32767, SEEK_SET)   = 32767
[pid  6860] write(7, "\0", 1)           = 1
[pid  6860] mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0x7fdcdb182000
[pid  6860] fcntl(7, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=121, l_len=2}) = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=124, l_len=4}) = 0
[pid  6860] fstat(6, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=121, l_len=2}) = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=124, l_len=4}) = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=120, l_len=1}) = 0
[pid  6860] fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=123, l_len=1}) = 0
[pid  6860] fstat(5, {st_mode=S_IFREG|0644, st_size=2523136, ...}) = 0
[pid  6860] lseek(5, 0, SEEK_SET)       = 0
[pid  6860] read(5, "SQLite format 3\0\20\0\2\2\0@  \0\0\0(\0\0\2h"..., 4096) = 4096
[pid  6860] fcntl(7, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=123, l_len=1}) = 0
[pid  6860] openat(AT_FDCWD, "/etc/passwd", O_RDONLY|O_CLOEXEC) = 8
[pid  6860] lseek(8, 0, SEEK_CUR)       = 0
[pid  6860] fstat(8, {st_mode=S_IFREG|0644, st_size=1884, ...}) = 0
[pid  6860] read(8, "root:x:0:0::/root:/gnu/store/n1c"..., 4096) = 1884
[pid  6860] close(8)                    = 0
[pid  6860] lstat("/var/guix/profiles/per-user/rie", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid  6860] chmod("/var/guix/profiles/per-user/rie", 0755) = 0
[pid  6860] chown("/var/guix/profiles/per-user/rie", 1000, -1) = 0
[pid  6860] rt_sigaction(SIGIO, {sa_handler=SIG_IGN, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, {sa_handler=0x40a370, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, 8) = 0
[pid  6860] write(4, "stla\0\0\0\0", 8) = 8
[pid  6860] read(4, "\23\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 312
[pid  6860] --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
[pid  6860] rt_sigaction(SIGIO, {sa_handler=0x40a370, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, {sa_handler=SIG_IGN, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, 8) = 0
[pid  6860] select(5, [4], NULL, NULL, {tv_sec=0, tv_usec=0}) = 0 (Timeout)
[pid  6860] rt_sigaction(SIGIO, {sa_handler=SIG_IGN, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, {sa_handler=0x40a370, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fdcdb4f8860}, 8) = 0
[pid  6860] write(4, "stla\0\0\0\0", 8) = 8
[pid  6860] read(4,