prompt不生效之解决

zoukankan html css js c++ java

prompt不生效之解决
配置文件路径：

/data/mysql/mysql3306/my.cnf

[client]
port = 3306

[mysql]
auto-rehash
prompt="\u@\h:\p [\d]>"
#pager="less -i -n -S"
#tee=/opt/mysql/query.log

[root@edu ~]# mysql -S /tmp/mysql3306.sock -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 23
Server version: 5.7.22-log MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql>

分析启动过程：

[root@zstedu ~]# strace /usr/local/mysql/bin/mysql --print-defaults
execve("/usr/local/mysql/bin/mysql", ["/usr/local/mysql/bin/mysql", "--print-defaults"], [/* 22 vars */]) = 0
brk(NULL) = 0xa6f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd222000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=22349, ...}) = 0
mmap(NULL, 22349, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2cbd21c000
close(3) = 0
open("/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF2113>1m"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=144792, ...}) = 0
mmap(NULL, 2208904, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbcde6000
mprotect(0x7f2cbcdfd000, 2093056, PROT_NONE) = 0
mmap(0x7f2cbcffc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7f2cbcffc000
mmap(0x7f2cbcffe000, 13448, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2cbcffe000
close(3) = 0
open("/lib64/librt.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF21133>1P""..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=44448, ...}) = 0
mmap(NULL, 2128952, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbcbde000
mprotect(0x7f2cbcbe5000, 2093056, PROT_NONE) = 0
mmap(0x7f2cbcde4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f2cbcde4000
close(3) = 0
open("/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF2113>1`16"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19776, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd21b000
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbc9da000
mprotect(0x7f2cbc9dc000, 2097152, PROT_NONE) = 0
mmap(0x7f2cbcbdc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f2cbcbdc000
close(3) = 0
open("/lib64/libncurses.so.5", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF2113>1Pm"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=163696, ...}) = 0
mmap(NULL, 2254920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbc7b3000
mprotect(0x7f2cbc7d9000, 2093056, PROT_NONE) = 0
mmap(0x7f2cbc9d8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x7f2cbc9d8000
close(3) = 0
open("/lib64/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF21133>1 2625"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=991616, ...}) = 0
mmap(NULL, 3171168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbc4ac000
mprotect(0x7f2cbc595000, 2093056, PROT_NONE) = 0
mmap(0x7f2cbc794000, 40960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe8000) = 0x7f2cbc794000
mmap(0x7f2cbc79e000, 82784, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2cbc79e000
close(3) = 0
open("/lib64/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF21133>1pS"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1139680, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd21a000
mmap(NULL, 3150136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbc1aa000
mprotect(0x7f2cbc2ab000, 2093056, PROT_NONE) = 0
mmap(0x7f2cbc4aa000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x100000) = 0x7f2cbc4aa000
close(3) = 0
open("/lib64/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF2113>1220*"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=88776, ...}) = 0
mmap(NULL, 2184192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbbf94000
mprotect(0x7f2cbbfa9000, 2093056, PROT_NONE) = 0
mmap(0x7f2cbc1a8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7f2cbc1a8000
close(3) = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF21133>1P%2"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2173512, ...}) = 0
mmap(NULL, 3981792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbbbc7000
mprotect(0x7f2cbbd8a000, 2093056, PROT_NONE) = 0
mmap(0x7f2cbbf89000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c2000) = 0x7f2cbbf89000
mmap(0x7f2cbbf8f000, 16864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2cbbf8f000
close(3) = 0
open("/lib64/libtinfo.so.5", O_RDONLY|O_CLOEXEC) = 3
read(3, "177ELF2113>1@316"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=174576, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd219000
mmap(NULL, 2268928, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2cbb99d000
mprotect(0x7f2cbb9c2000, 2097152, PROT_NONE) = 0
mmap(0x7f2cbbbc2000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x7f2cbbbc2000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd218000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd216000
arch_prctl(ARCH_SET_FS, 0x7f2cbd216740) = 0
mprotect(0x7f2cbbf89000, 16384, PROT_READ) = 0
mprotect(0x7f2cbbbc2000, 16384, PROT_READ) = 0
mprotect(0x7f2cbc1a8000, 4096, PROT_READ) = 0
mprotect(0x7f2cbc4aa000, 4096, PROT_READ) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd215000
mprotect(0x7f2cbc794000, 32768, PROT_READ) = 0
mprotect(0x7f2cbcbdc000, 4096, PROT_READ) = 0
mprotect(0x7f2cbc9d8000, 4096, PROT_READ) = 0
mprotect(0x7f2cbcffc000, 4096, PROT_READ) = 0
mprotect(0x7f2cbcde4000, 4096, PROT_READ) = 0
mprotect(0x7f2cbd223000, 4096, PROT_READ) = 0
munmap(0x7f2cbd21c000, 22349) = 0
set_tid_address(0x7f2cbd216a10) = 5039
set_robust_list(0x7f2cbd216a20, 24) = 0
rt_sigaction(SIGRTMIN, {0x7f2cbcdec7e0, [], SA_RESTORER|SA_SIGINFO, 0x7f2cbcdf56d0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7f2cbcdec870, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7f2cbcdf56d0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
brk(NULL) = 0xa6f000
brk(0xa90000) = 0xa90000
brk(NULL) = 0xa90000
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
dup(1) = 3
close(3) = 0
stat("/etc/my.cnf", 0x7ffe45e970f0) = -1 ENOENT (No such file or directory)
stat("/etc/mysql/my.cnf", 0x7ffe45e970f0) = -1 ENOENT (No such file or directory)
stat("/usr/local/mysql/etc/my.cnf", 0x7ffe45e970f0) = -1 ENOENT (No such file or directory)
stat("/root/.my.cnf", 0x7ffe45e970f0) = -1 ENOENT (No such file or directory)
stat("/root/.mylogin.cnf", 0x7ffe45e970f0) = -1 ENOENT (No such file or directory)
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2cbd221000
write(1, "/usr/local/mysql/bin/mysql would"..., 81/usr/local/mysql/bin/mysql would have been started with the following arguments:
) = 81
write(1, " ", 1
) = 1
exit_group(0) = ?
+++ exited with 0 +++

临时不退出方法：

mysql> prompt (u@h) [d]>\_
PROMPT set to '(u@h) [d]>\_'
(root@localhost) [(none)]>

(root@localhost:mysql3306.sock) [(none)]> prompt (u@h:p) [d]>\_
PROMPT set to '(u@h:p) [d]>\_'
(root@localhost:mysql3306.sock) [(none)]>

最终方法：

　考虑到官方文档中提示会读取到/etc/my.cnf和~/.my.cnf下的prompt，就容易联想到是不是mysql客户端就只能读取到默认路径下的[mysql]？

　　继续做以下尝试：
[root@dd ~]# /usr/local/mysql/bin/mysql --verbose --help | grep my.cnf order of preference, my.cnf, $MYSQL_TCP_PORT, /etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf
[root@zstedu ~]# cat /etc/my.cnf
[mysql]
prompt=\u@\h:\p [\d]>
[root@zstedu ~]# mysql -S /tmp/mysql3306.sock -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 6
Server version: 5.7.22-log MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

root@localhost:mysql3306.sock [(none)]>
查看全文

相关阅读:
C语言 sprintf 函数 C语言零基础入门教程
 C语言 printf 函数 C语言零基础入门教程
 C语言文件读写 fgets 函数 C语言零基础入门教程
 C语言文件读写 fputs 函数 C语言零基础入门教程
 C语言 fprintf 函数 C语言零基础入门教程
 C语言文件读写 fgetc 函数 C语言零基础入门教程
 C语言文件读写 fputc 函数 C语言零基础入门教程
 C语言 strlen 函数 C语言零基础入门教程
 Brad Abrams关于Naming Conventions的演讲中涉及到的生词集解
 适配器模式

原文地址：https://www.cnblogs.com/chinaops/p/9238649.html