generate list of executables and cache faster

1 files changed, 61 insertions, 0 deletions

diff --git a/swenu-exes.c b/swenu-exes.c
new file mode 100644
index 0000000..07acda9
--- /dev/null
+++ b/swenu-exes.c
@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+int main(int argc, char** argv) {
+	char* pathenv = getenv("PATH");
+	if (!pathenv) {
+		fprintf(stderr, "Failed to find PATH enviroment variable\n");
+		return 1;
+	}
+
+	if (argc == 2) {
+		struct stat file;
+		if (stat(argv[1], &file) == -1) {
+			return 0;
+		}
+		char* dir = NULL;
+		for (dir = strtok(pathenv, ":"); (dir = strtok(NULL, ":"));) {
+			struct stat buf;
+			if (stat(dir, &buf) == -1) {
+				fprintf(stderr, "%s: %s\n", strerror(errno), argv[1]);
+				continue;
+			}
+			if (S_ISDIR(buf.st_mode) && buf.st_mtime > file.st_mtime) {
+				return 0;
+			}
+		}
+		return 1;
+	}
+
+	char path[PATH_MAX];
+
+	char* dir = NULL;
+	for (dir = strtok(pathenv, ":"); (dir = strtok(NULL, ":"));) {
+		DIR* dirfd = opendir(dir);
+		if (!dirfd) {
+			fprintf(stderr, "%s: %s\n", strerror(errno), dir);
+			continue;
+		}
+
+		struct dirent* d = NULL;
+		while ((d = readdir(dirfd))) {
+			int r = snprintf(path, sizeof(path), "%s/%s", dir, d->d_name);
+			if (r <= 0 || r >= PATH_MAX) continue;
+			struct stat buf;
+			if (stat(path, &buf) == -1) {
+				fprintf(stderr, "%s: %s\n", strerror(errno), path);
+				continue;
+			}
+			if (S_ISREG(buf.st_mode) && !access(path, X_OK)) {
+				puts(d->d_name);
+			}
+		}
+		closedir(dirfd);
+	}
+	return 0;
+}