busybox 'udhcpc kann nicht beendet werden

Auf einem Linux-Gerät mit busybox verwende ich die folgenden / etc / network / schnittstellen

... # Wired interface eth0 is using dhcp, enabled while system start auto eth0 iface eth0 inet dhcp pre-up [ -n "$(cat /var/run/udhcpc.eth0.pid 2> /dev/null)" ] && \  kill -9 $(cat /var/run/udhcpc.eth0.pid) || true pre-up /bin/grep -v -e "ip=[0-9]\\+\\.[0-9]\\+\\.[0-9]\\+\\.[0-9]\\+" \  /proc/cmdline > /dev/null post-down [ -n "$(cat /var/run/udhcpc.eth0.pid 2> /dev/null)" ] && \ kill -15 $(cat /var/run/udhcpc.eth0.pid) || true  post-down ip addr flush dev eth0 || true 

Aber auf ifdown eth0 funktioniert der Kill -15 für udhcpc nicht. Ich habe daher den Pre-Up- Kill -9 hinzugefügt .

Dies geschieht nicht nur im Fall von ifup / ifdown, sondern auch, wenn ich versuche, die udhcp-Kommandozeile danach zu beenden.

Ist das ein häufiges Problem? Lohnt es sich, über den Unterschied zwischen kill -15 und kill -9 bei udhcpc nachzudenken?

strace:

> strace kill -15 2110 execve("/bin/kill", ["kill", "-15", "2110"], [/* 15 vars */]) = 0 brk(0) = 0x8e000 uname() = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f59000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat64(3, ) = 0 mmap2(NULL, 14548, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb6f55000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp/libm.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) ... open("/lib/libm.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\320;dH4\0\0\0"..., 512) = 512 lseek(3, 399368, SEEK_SET) = 399368 read(3, "\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\0"..., 1280) = 1280 lseek(3, 397488, SEEK_SET) = 397488 read(3, "A6\0\0\0aeabi\0\1,\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 55) = 55 fstat64(3, ) = 0 mmap2(0x48640000, 430264, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x48640000 mprotect(0x486a1000, 28672, PROT_NONE) = 0 mmap2(0x486a8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x60) = 0x486a8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\335\4SH4\0\0\0"..., 512) = 512 lseek(3, 887460, SEEK_SET) = 887460 read(3, "\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\0"..., 1480) = 1480 lseek(3, 885236, SEEK_SET) = 885236 read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 53) = 53 fstat64(3, ) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f54000 mmap2(0x48518000, 928112, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x48518000 mprotect(0x485ed000, 32768, PROT_NONE) = 0 mmap2(0x485f5000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xd5) = 0x485f5000 mmap2(0x485f9000, 6512, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x485f9000 close(3) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f53000 set_tls(0xb6f534c0, 0xb6f53b98, 0x4847f048, 0xb6f534c0, 0xb6f54500) = 0 mprotect(0x485f5000, 8192, PROT_READ) = 0 mprotect(0x486a8000, 4096, PROT_READ) = 0 mprotect(0x4847e000, 4096, PROT_READ) = 0 munmap(0xb6f55000, 14548) = 0 getuid32() = 0 getpid() = 4931 kill(2110, SIGTERM) = 0 exit_group(0) = ? +++ exited with 0 +++