diff options
Diffstat (limited to 'sys/kern/kern_environment.c')
| -rw-r--r-- | sys/kern/kern_environment.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sys/kern/kern_environment.c b/sys/kern/kern_environment.c index fc0039a..73551f4 100644 --- a/sys/kern/kern_environment.c +++ b/sys/kern/kern_environment.c @@ -60,6 +60,8 @@ static MALLOC_DEFINE(M_KENV, "kenv", "kernel environment"); /* pointer to the static environment */ char *kern_envp; +static int env_len; +static int env_pos; static char *kernenv_next(char *); /* dynamic environment variables */ @@ -208,6 +210,14 @@ done: return (error); } +void +init_static_kenv(char *buf, size_t len) +{ + kern_envp = buf; + env_len = len; + env_pos = 0; +} + /* * Setup the dynamic kernel environment. */ @@ -336,6 +346,26 @@ testenv(const char *name) return (0); } +static int +setenv_static(const char *name, const char *value) +{ + int len; + + if (env_pos >= env_len) + return (-1); + + /* Check space for x=y and two nuls */ + len = strlen(name) + strlen(value); + if (len + 3 < env_len - env_pos) { + len = sprintf(&kern_envp[env_pos], "%s=%s", name, value); + env_pos += len+1; + kern_envp[env_pos] = '\0'; + return (0); + } else + return (-1); + +} + /* * Set an environment variable by name. */ @@ -345,6 +375,9 @@ setenv(const char *name, const char *value) char *buf, *cp, *oldenv; int namelen, vallen, i; + if (dynamic_kenv == 0 && env_len > 0) + return (setenv_static(name, value)); + KENV_CHECK; namelen = strlen(name) + 1; |
