so://phie

diff --git a/src/main.c b/src/main.c
index 2aa0013..cc34490 100644
--- a/src/main.c
+++ b/src/main.c

 1@@ -14,7 +14,7 @@
 2 #define UTIL_IMPL
 3 #include "util.h" // IWYU pragma: keep
 4 
 5-#define PORT 8087
 6+#define SOSO_PORT "SOSO_PORT"
 7 
 8 #include "module/page.h"
 9 #include "module/default.h"
10@@ -208,15 +208,26 @@ int main(void) {
11   sigint_action.sa_flags = 0;
12   sigemptyset(&sigint_action.sa_mask);
13   sigaction(SIGSEGV, &sigint_action, NULL);
14+  char *port_str = getenv(SOSO_PORT);
15+  if (!port_str) {
16+    printf("no port specified! set environment variable SOSO_PORT.\n");
17+    return 1;
18+  }
19+  char *end = NULL;
20+  int port = strtoimax(port_str, &end, 10);
21+  if (end == port_str || *end != '\0') {
22+    printf("invalid port specified! set environment variable SOSO_PORT.\n");
23+    return 1;
24+  }
25   tpee_t *tpee = tpee_init();
26-  if (tpee_bind(tpee, "0.0.0.0", PORT, NULL, 0) != TPEE_ERR_OK) {
27+  if (tpee_bind(tpee, "0.0.0.0", port, NULL, 0) != TPEE_ERR_OK) {
28     printf("failed to bind port!\n");
29     return 1;
30   }
31   git_libgit2_init();
32   git_libgit2_opts(GIT_OPT_SET_OWNER_VALIDATION, 0);
33   if (tpee_listen(tpee) == TPEE_ERR_OK) {
34-    printf("ready and listening (pid: %d)\n", getpid());
35+    printf("ready and listening (pid: %d, port: %d)\n", getpid(), port);
36     pause();
37   }
38   git_libgit2_shutdown();
39
40