| /* |
| * setenv.c |
| */ |
| |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| /* str should be a duplicated version of the input string; |
| len is the length of the key including the = sign */ |
| int __put_env(char *str, size_t len, int overwrite); |
| |
| int setenv(const char *name, const char *val, int overwrite) |
| { |
| const char *z; |
| char *s; |
| size_t l1, l2; |
| |
| if ( !name || !name[0] ) { |
| errno = EINVAL; |
| return -1; |
| } |
| |
| l1 = 0; |
| for ( z = name ; *z ; z++ ) { |
| l1++; |
| if ( *z == '=' ) { |
| errno = EINVAL; |
| return -1; |
| } |
| } |
| |
| l2 = strlen(val); |
| |
| s = malloc(l1+l2+2); |
| if ( !s ) |
| return -1; |
| |
| memcpy(s, name, l1); |
| s[l1] = '='; |
| memcpy(s+l1+1, val, l2+1); |
| |
| return __put_env(s, l1+1, overwrite); |
| } |