65ba7113e
Denys Vlasenko
2016-09-24
Subject
libbb: handle \S in /etc/issue
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Commit Diff GitHub →
libbb/login.c+40 -0
| @@ -45,6 +45,45 @@ void FAST_FUNC print_login_issue(const char *issue_file, const char *tty) | |
| if (c == '\\' || c == '%') { | |
| c = fgetc(fp); | |
| switch (c) { | |
| + | //From getty manpage (* - supported by us) |
| + | //======================================== |
| + | //4 or 4{interface} |
| + | // Insert the IPv4 address of the network interface (example: \4{eth0}). |
| + | // If the interface argument is not specified, then select the first |
| + | // fully configured (UP, non-LOOPBACK, RUNNING) interface. |
| + | //6 or 6{interface} -- The same as \4 but for IPv6. |
| + | //b -- Insert the baudrate of the current line. |
| + | //*d -- Insert the current date. |
| + | //*t -- Insert the current time. |
| + | //e or e{name} |
| + | // Translate the human-readable name to an escape sequence and insert it |
| + | // (for example: \e{red}Alert text.\e{reset}). If the name argument |
| + | // is not specified, then insert \033. The currently supported names are: |
| + | // black, blink, blue, bold, brown, cyan, darkgray, gray, green, halfbright, |
| + | // lightblue, lightcyan, lightgray, lightgreen, lightmagenta, lightred, |
| + | // magenta, red, reset, reverse, and yellow. Unknown names are ignored. |
| + | //*s |
| + | // Insert the system name (the name of the operating system - `uname -s`) |
| + | //*S or S{VARIABLE} |
| + | // Insert the VARIABLE data from /etc/os-release. |
| + | // If the VARIABLE argument is not specified, use PRETTY_NAME. |
| + | // If PRETTY_NAME is not in /etc/os-release, \S is the same as \s. |
| + | //*l -- Insert the name of the current tty line. |
| + | //*m -- Insert the architecture identifier of the machine: `uname -m`. |
| + | //*n -- Insert the nodename of the machine: `uname -n`. |
| + | //*o -- Insert the NIS domainname of the machine. Same as `hostname -d'. |
| + | //*O -- Insert the DNS domainname of the machine. |
| + | //*r -- Insert the release number of the OS: `uname -r`. |
| + | //u -- Insert the number of current users logged in. |
| + | //U -- Insert the string "1 user" or "N users" (current users logged in). |
| + | //*v -- Insert the version of the OS, e.g. the build-date etc: `uname -v`. |
| + | //We also implement: |
| + | //*D -- same as \O "DNS domainname" |
| + | //*h -- same as \n "nodename" |
| + | |
| + | case 'S': |
| + | /* minimal implementation, not reading /etc/os-release */ |
| + | /*FALLTHROUGH*/ |
| case 's': | |
| outbuf = uts.sysname; | |
| break; | |
| @@ -65,6 +104,7 @@ void FAST_FUNC print_login_issue(const char *issue_file, const char *tty) | |
| #if defined(__linux__) | |
| case 'D': | |
| case 'o': | |
| + | case 'O': |
| outbuf = uts.domainname; | |
| break; | |
| #endif | |