git/compat/setenv.c
Erik Faye-Lund 6ac1b2a3b8 compat/setenv.c: error if name contains '='
According to POSIX, setenv should error out with EINVAL if it's
asked to set an environment variable whose name contains an equals
sign. Implement this detail in our compatibility-fallback.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-14 19:31:03 -08:00

41 lines
857 B
C

#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((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;
}