build: support single file commands

1 files changed, 55 insertions, 0 deletions

diff --git a/src/cmd/find.c b/src/cmd/find.c
new file mode 100644
index 0000000..d473b82
--- /dev/null
+++ b/src/cmd/find.c
@@ -0,0 +1,55 @@
+#include <camellia/path.h>
+#include <dirent.h>
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void recurse(char *path) {
+	DIR *d = opendir(path);
+	if (!d) {
+		warn("couldn't open %s", path);
+		return;
+	}
+	for (;;) {
+		struct dirent *dent;
+		errno = 0;
+		dent = readdir(d);
+		if (!dent) {
+			if (errno) {
+				warn("when reading %s", path);
+			}
+			break;
+		}
+		printf("%s%s\n", path, dent->d_name);
+		/* if the string ends with '/' */
+		if (strchr(dent->d_name, '\0')[-1] == '/') {
+			// TODO no overflow check
+			char *pend = strchr(path, '\0');
+			strcpy(pend, dent->d_name);
+			recurse(path);
+			*pend = '\0';
+		}
+	}
+	closedir(d);
+}
+
+void find(const char *path) {
+	// TODO bound checking
+	// TODO or just implement asprintf()
+	char *buf = malloc(PATH_MAX);
+	memcpy(buf, path, strlen(path)+1);
+	recurse(buf);
+	free(buf);
+}
+
+int main(int argc, char **argv) {
+	if (argc < 2) {
+		find("/");
+	} else {
+		for (int i = 1; i < argc; i++)
+			find(argv[i]);
+	}
+	return 0;
+}