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git/compat/setenv.c

40 lines
862 B

#include "../git-compat-util.h"
int gitsetenv(const char *name, const char *value, int replace)
{
int out;
size_t namelen, valuelen;
char *envstr;
if (!name || strchr(name, '=') || !value) {
errno = EINVAL;
return -1;
}
if (!replace) {
char *oldval = NULL;
oldval = getenv(name);
if (oldval) return 0;
}
namelen = strlen(name);
valuelen = strlen(value);
envstr = malloc(st_add3(namelen, valuelen, 2));
if (!envstr) {
errno = ENOMEM;
return -1;
}
memcpy(envstr, name, namelen);
envstr[namelen] = '=';
memcpy(envstr + namelen + 1, value, valuelen);
envstr[namelen + valuelen + 1] = 0;
out = putenv(envstr);
/* putenv(3) makes the argument string part of the environment,
* and changing that string modifies the environment --- which
* means we do not own that storage anymore. Do not free
* envstr.
*/
return out;
}