| 1 | #include "../git-compat-util.h" |
| 2 | |
| 3 | int gitsetenv(const char *name, const char *value, int replace) |
| 4 | { |
| 5 | int out; |
| 6 | size_t namelen, valuelen; |
| 7 | char *envstr; |
| 8 | |
| 9 | if (!name || strchr(name, '=') || !value) { |
| 10 | errno = EINVAL; |
| 11 | return -1; |
| 12 | } |
| 13 | if (!replace) { |
| 14 | char *oldval = NULL; |
| 15 | oldval = getenv(name); |
| 16 | if (oldval) return 0; |
| 17 | } |
| 18 | |
| 19 | namelen = strlen(name); |
| 20 | valuelen = strlen(value); |
| 21 | envstr = malloc(st_add3(namelen, valuelen, 2)); |
| 22 | if (!envstr) { |
| 23 | errno = ENOMEM; |
| 24 | return -1; |
| 25 | } |
| 26 | |
| 27 | memcpy(envstr, name, namelen); |
| 28 | envstr[namelen] = '='; |
| 29 | memcpy(envstr + namelen + 1, value, valuelen); |
| 30 | envstr[namelen + valuelen + 1] = 0; |
| 31 | |
| 32 | out = putenv(envstr); |
| 33 | /* putenv(3) makes the argument string part of the environment, |
| 34 | * and changing that string modifies the environment --- which |
| 35 | * means we do not own that storage anymore. Do not free |
| 36 | * envstr. |
| 37 | */ |
| 38 | |
| 39 | return out; |
| 40 | } |