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runit/chpst: "change process state" utility

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It's "nice" on steroids - can set uid/gid, mem/cpu limits etc. +3.5k
This commit is contained in:
Denis Vlasenko
2006-10-03 15:57:40 +00:00
parent 7c1ed2e922
commit fe54458e46
8 changed files with 107 additions and 34 deletions
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47
libbb/setup_environment.c
View File

@@ -42,15 +42,9 @@
#define DEFAULT_LOGIN_PATH "/bin:/usr/bin"
#define DEFAULT_ROOT_LOGIN_PATH "/usr/sbin:/bin:/usr/bin:/sbin"
static void xsetenv ( const char *key, const char *value )
void setup_environment(const char *shell, int loginshell, int changeenv, const struct passwd *pw)
{
if ( setenv ( key, value, 1 ))
bb_error_msg_and_die (bb_msg_memory_exhausted);
}
void setup_environment ( const char *shell, int loginshell, int changeenv, const struct passwd *pw )
{
if ( loginshell ) {
if (loginshell) {
const char *term;
/* Change the current working directory to be the home directory
@@ -59,32 +53,31 @@ void setup_environment ( const char *shell, int loginshell, int changeenv, const
* directory.
* Some systems default to HOME=/
*/
if ( chdir ( pw-> pw_dir )) {
xchdir ( "/" );
fputs ( "warning: cannot change to home directory\n", stderr );
if (chdir(pw->pw_dir)) {
xchdir("/");
fputs("warning: cannot change to home directory\n", stderr);
}
/* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH.
Unset all other environment variables. */
term = getenv ("TERM");
clearenv ( );
if ( term )
xsetenv ( "TERM", term );
xsetenv ( "HOME", pw-> pw_dir );
xsetenv ( "SHELL", shell );
xsetenv ( "USER", pw-> pw_name );
xsetenv ( "LOGNAME", pw-> pw_name );
xsetenv ( "PATH", ( pw-> pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH ));
term = getenv("TERM");
clearenv();
if (term)
xsetenv("TERM", term);
xsetenv("HOME", pw->pw_dir);
xsetenv("SHELL", shell);
xsetenv("USER", pw->pw_name);
xsetenv("LOGNAME", pw->pw_name);
xsetenv("PATH", (pw->pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH));
}
else if ( changeenv ) {
else if (changeenv) {
/* Set HOME, SHELL, and if not becoming a super-user,
USER and LOGNAME. */
xsetenv ( "HOME", pw-> pw_dir );
xsetenv ( "SHELL", shell );
if ( pw-> pw_uid ) {
xsetenv ( "USER", pw-> pw_name );
xsetenv ( "LOGNAME", pw-> pw_name );
xsetenv("HOME", pw->pw_dir);
xsetenv("SHELL", shell);
if (pw->pw_uid) {
xsetenv("USER", pw->pw_name);
xsetenv("LOGNAME", pw->pw_name);
}
}
}

8
libbb/xfuncs.c
View File

@@ -255,6 +255,14 @@ int wait4pid(int pid)
}
#endif
#ifdef L_xsetenv
void xsetenv(const char *key, const char *value)
{
if(setenv(key, value, 1))
bb_error_msg_and_die(bb_msg_memory_exhausted);
}
#endif
#ifdef L_itoa
// Convert unsigned integer to ascii, writing into supplied buffer. A
// truncated result is always null terminated (unless buflen is 0), and