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Added in support for env on linux.

This commit is contained in:
Adam Harrison 2022-01-22 12:36:30 -05:00
parent 428c757a13
commit ed4128bc65
1 changed files with 17 additions and 13 deletions
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28
src/api/process.c
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@ -117,7 +117,7 @@ static bool signal_process(process_t* proc, signal_e sig) {
static int process_start(lua_State* L) { static int process_start(lua_State* L) {
size_t env_len = 0, key_len, val_len; size_t env_len = 0, key_len, val_len;
const char *cmd[256], *env[256] = { NULL }, *cwd = NULL; const char *cmd[256], *env_names[256] = { NULL }, *env_values[256] = { NULL }, *cwd = NULL;
bool detach = false; bool detach = false;
int deadline = 10, new_fds[3] = { STDIN_FD, STDOUT_FD, STDERR_FD }; int deadline = 10, new_fds[3] = { STDIN_FD, STDOUT_FD, STDERR_FD };
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
@ -141,9 +141,12 @@ static int process_start(lua_State* L) {
while (lua_next(L, -2) != 0) { while (lua_next(L, -2) != 0) {
const char* key = luaL_checklstring(L, -2, &key_len); const char* key = luaL_checklstring(L, -2, &key_len);
const char* val = luaL_checklstring(L, -1, &val_len); const char* val = luaL_checklstring(L, -1, &val_len);
env[env_len] = malloc(key_len+val_len+2); env_names[env_len] = malloc(key_len+1);
snprintf((char*)env[env_len++], key_len+val_len+2, "%s=%s", key, val); strcpy((char*)env_names[env_len], key);
env_values[env_len] = malloc(val_len+1);
strcpy((char*)env_values[env_len], val);
lua_pop(L, 1); lua_pop(L, 1);
++env_len;
} }
} else } else
lua_pop(L, 1); lua_pop(L, 1);
@ -158,7 +161,6 @@ static int process_start(lua_State* L) {
return luaL_error(L, "redirect to handles, FILE* and paths are not supported"); return luaL_error(L, "redirect to handles, FILE* and paths are not supported");
} }
} }
env[env_len] = NULL;
process_t* self = lua_newuserdata(L, sizeof(process_t)); process_t* self = lua_newuserdata(L, sizeof(process_t));
memset(self, 0, sizeof(process_t)); memset(self, 0, sizeof(process_t));
@ -224,11 +226,9 @@ static int process_start(lua_State* L) {
strcat(commandLine, cmd[i]); strcat(commandLine, cmd[i]);
} }
for (size_t i = 0; i < env_len; ++i) { for (size_t i = 0; i < env_len; ++i) {
size_t len = strlen(env[i]); if (offset + strlen(env_values[i]) + strlen(env_names[i]) + 1 >= sizeof(environmentBlock))
if (offset + len >= sizeof(environmentBlock))
break; break;
memcpy(&environmentBlock[offset], env[i], len); offset += snprintf(&environmentBlock[offset], sizeof(environmentBlock) - offset, "%s=%s", env_names[i], env_values[i]);
offset += len;
environmentBlock[offset++] = 0; environmentBlock[offset++] = 0;
} }
environmentBlock[offset++] = 0; environmentBlock[offset++] = 0;
@ -259,15 +259,19 @@ static int process_start(lua_State* L) {
dup2(self->child_pipes[new_fds[stream]][new_fds[stream] == STDIN_FD ? 0 : 1], stream); dup2(self->child_pipes[new_fds[stream]][new_fds[stream] == STDIN_FD ? 0 : 1], stream);
close(self->child_pipes[stream][stream == STDIN_FD ? 1 : 0]); close(self->child_pipes[stream][stream == STDIN_FD ? 1 : 0]);
} }
if ((!detach || setsid() != -1) && (!cwd || chdir(cwd) != -1)) int set;
for (set = 0; set < env_len && setenv(env_names[set], env_values[set], 1) == 0; ++set);
if (set == env_len && (!detach || setsid() != -1) && (!cwd || chdir(cwd) != -1))
execvp((const char*)cmd[0], (char* const*)cmd); execvp((const char*)cmd[0], (char* const*)cmd);
const char* msg = strerror(errno); const char* msg = strerror(errno);
int result = write(STDERR_FD, msg, strlen(msg)+1); int result = write(STDERR_FD, msg, strlen(msg)+1);
exit(result == strlen(msg)+1 ? -1 : -2); _exit(result == strlen(msg)+1 ? -1 : -2);
} }
#endif #endif
for (size_t i = 0; i < env_len; ++i) for (size_t i = 0; i < env_len; ++i) {
free((char*)env[i]); free((char*)env_names[i]);
free((char*)env_values[i]);
}
for (int stream = 0; stream < 3; ++stream) for (int stream = 0; stream < 3; ++stream)
close_fd(&self->child_pipes[stream][stream == STDIN_FD ? 0 : 1]); close_fd(&self->child_pipes[stream][stream == STDIN_FD ? 0 : 1]);
self->running = true; self->running = true;