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-rw-r--r--src/satd.c56
1 files changed, 55 insertions, 1 deletions
diff --git a/src/satd.c b/src/satd.c
index 62f4872..0d3578f 100644
--- a/src/satd.c
+++ b/src/satd.c
@@ -21,6 +21,7 @@
*/
#include <unistd.h>
#include <errno.h>
+#include <pwd.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
@@ -109,6 +110,47 @@ fail:
/**
+ * Construct the pathname for the hook script.
+ *
+ * @param env The environment variable to use for the beginning
+ * of the pathname, `NULL` for the home directory.
+ * @param suffix The rest of the pathname.
+ * @return The pathname.
+ *
+ * @throws 0 The environment variable is not set, or, if `env` is
+ * `NULL` the user is root or homeless.
+ */
+static char *
+hookpath(const char *env, const char *suffix)
+{
+ const char *prefix = NULL;
+ char *path;
+ struct passwd *pwd;
+
+ if (!env) {
+ if (!getuid())
+ goto try_next;
+ pwd = getpwuid(getuid());
+ prefix = pwd ? pwd->pw_dir : NULL;
+ } else {
+ prefix = getenv(env);
+ }
+ if (!prefix || !*prefix)
+ goto try_next;
+
+ path = malloc((strlen(prefix) + strlen(suffix) + 1) * sizeof(char));
+ t (!path);
+ stpcpy(stpcpy(path, prefix), suffix);
+
+ return path;
+fail:
+ return NULL;
+try_next:
+ return errno = 0, NULL;
+}
+
+
+/**
* The sat daemon.
*
* @param argc Any value in [0, 2] is accepted.
@@ -169,7 +211,19 @@ main(int argc, char *argv[])
}
/* Get hook-script pathname. */
- /* TODO */
+ if (!getenv("SAT_HOOK_PATH")) {
+ int do_not_free = 0;
+ path = hookpath("XDG_CONFIG_HOME", "/sat/hook");
+ t (!path && errno);
+ path = path ? path : hookpath("HOME", "/.config/sat/hook");
+ t (!path && errno);
+ path = path ? path : hookpath(NULL, "/.config/sat/hook");
+ t (!path && errno);
+ path = path ? path : (do_not_free = 1, "/etc/sat/hook");
+ t (setenv("SAT_HOOK_PATH", path, 1));
+ if (!do_not_free)
+ free(path);
+ }
/* Listen for incoming conections. */
#if SOMAXCONN < SATD_BACKLOG