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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
int
libexec_putenv(struct libexec_command *cmd, enum libexec_insert_mode how, const char *string)
{
char **env;
char *copy, *eqsign;
size_t i, n, len;
int environ_copied = 0;
void *new;
if (!cmd || !string) {
errno = EINVAL;
return -1;
}
env = cmd->environ ? cmd->environ : environ;
if (how == LIBEXEC_APPEND || how == LIBEXEC_PREPEND) {
n = 0;
while (env[n])
n++;
just_add:
copy = strdup(string);
if (!copy)
return -1;
if (!cmd->environ) {
if (libexec_copy_environ(cmd, NULL)) {
free(copy);
return -1;
}
environ_copied = 1;
}
new = realloc(cmd->environ, (n + 2) * sizeof(*cmd->environ));
if (!new) {
if (environ_copied) {
while (n)
free(cmd->environ[--n]);
free(cmd->environ);
cmd->environ = NULL;
}
free(copy);
return -1;
}
cmd->environ = new;
if (how == LIBEXEC_APPEND) {
cmd->environ[n] = copy;
cmd->environ[n + 1] = NULL;
} else {
memmove(&cmd->environ[1], cmd->environ, (n + 1) * sizeof(*cmd->environ));
cmd->environ[0] = copy;
}
} else {
eqsign = strchr(string, '=');
if (!eqsign || (how != LIBEXEC_REPLACE && how != LIBEXEC_NOCLOBBER && how != LIBEXEC_NOREPLACE)) {
errno = EINVAL;
return -1;
}
len = (size_t)(eqsign - string) + 1;
for (i = 0; env[i]; i++)
if (!strncmp(env[i], string, len))
break;
if (!env[i]) {
n = i;
how = LIBEXEC_APPEND;
goto just_add;
}
if (how == LIBEXEC_NOREPLACE || !strcmp(env[i], string)) {
if (!cmd->environ) {
if (libexec_copy_environ(cmd, NULL)) {
free(copy);
return -1;
}
}
return 0;
}
if (how == LIBEXEC_NOCLOBBER)
return -1; /* do not change errno */
copy = strdup(string);
if (!copy)
return -1;
if (!cmd->environ) {
if (libexec_copy_environ(cmd, NULL)) {
free(copy);
return -1;
}
}
free(cmd->environ[i]);
cmd->environ[i] = copy;
}
return 0;
}
#else
int
main(void)
{
/* Correct usage is tested via
* libexec_putenv_append.c,
* libexec_putenv_noclobber.c,
* libexec_putenv_noreplace.c,
* libexec_putenv_prepend.c, and
* libexec_putenv_replace.c */
struct libexec_command cmd, ref;
libexec_init_command(&cmd);
memcpy(&ref, &cmd, sizeof(cmd));
errno = 0;
ASSERT_EQ_INT(libexec_putenv(&cmd, (enum libexec_insert_mode)-1, "A=B"), -1);
ASSERT_EQ_INT(errno, EINVAL);
ASSERT_IS_TRUE(!memcmp(&cmd, &ref, sizeof(cmd)));
errno = 0;
ASSERT_EQ_INT(libexec_putenv(&cmd, (enum libexec_insert_mode)LIBEXEC_INSERT_MODE__COUNT__, "A=B"), -1);
ASSERT_EQ_INT(errno, EINVAL);
ASSERT_IS_TRUE(!memcmp(&cmd, &ref, sizeof(cmd)));
return 0;
}
#endif
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