From 9cba8770a2f08457735556b480164fcea2853de8 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Sun, 14 Feb 2016 16:56:36 -0500
Subject: Implement -user and -group.

---
 parse.c  | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests.sh | 18 +++++++++++++-
 2 files changed, 100 insertions(+), 1 deletion(-)

diff --git a/parse.c b/parse.c
index e1e3c62..86404c9 100644
--- a/parse.c
+++ b/parse.c
@@ -10,10 +10,13 @@
  *********************************************************************/
 
 #include "bfs.h"
+#include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <fnmatch.h>
+#include <grp.h>
 #include <limits.h>
+#include <pwd.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -427,6 +430,82 @@ static struct expr *parse_depth(struct parser_state *state, const char *option,
 	return new_option(state, option);
 }
 
+/**
+ * Parse -group.
+ */
+static struct expr *parse_group(struct parser_state *state, const char *option) {
+	struct expr *expr = parse_test_sdata(state, option, eval_gid);
+	if (!expr) {
+		return NULL;
+	}
+
+	const char *error;
+
+	errno = 0;
+	struct group *grp = getgrnam(expr->sdata);
+	if (grp) {
+		expr->idata = grp->gr_gid;
+	} else if (errno != 0) {
+		error = strerror(errno);
+		goto error;
+	} else if (isdigit(expr->sdata[0])) {
+		if (!parse_int(state, expr->sdata, &expr->idata)) {
+			goto fail;
+		}
+	} else {
+		error = "No such group";
+		goto error;
+	}
+
+	return expr;
+
+error:
+	pretty_error(state->cmdline->stderr_colors,
+	             "%s %s: %s\n", option, expr->sdata, error);
+
+fail:
+	free_expr(expr);
+	return NULL;
+}
+
+/**
+ * Parse -user.
+ */
+static struct expr *parse_user(struct parser_state *state, const char *option) {
+	struct expr *expr = parse_test_sdata(state, option, eval_uid);
+	if (!expr) {
+		return NULL;
+	}
+
+	const char *error;
+
+	errno = 0;
+	struct passwd *pwd = getpwnam(expr->sdata);
+	if (pwd) {
+		expr->idata = pwd->pw_uid;
+	} else if (errno != 0) {
+		error = strerror(errno);
+		goto error;
+	} else if (isdigit(expr->sdata[0])) {
+		if (!parse_int(state, expr->sdata, &expr->idata)) {
+			goto fail;
+		}
+	} else {
+		error = "No such user";
+		goto error;
+	}
+
+	return expr;
+
+error:
+	pretty_error(state->cmdline->stderr_colors,
+	             "%s %s: %s\n", option, expr->sdata, error);
+
+fail:
+	free_expr(expr);
+	return NULL;
+}
+
 /**
  * Set the FNM_CASEFOLD flag, if supported.
  */
@@ -680,6 +759,8 @@ static struct expr *parse_literal(struct parser_state *state) {
 	case 'g':
 		if (strcmp(arg, "-gid") == 0) {
 			return parse_test_icmp(state, arg, eval_gid);
+		} else if (strcmp(arg, "-group") == 0) {
+			return parse_group(state, arg);
 		}
 		break;
 
@@ -786,6 +867,8 @@ static struct expr *parse_literal(struct parser_state *state) {
 	case  'u':
 		if (strcmp(arg, "-uid") == 0) {
 			return parse_test_icmp(state, arg, eval_uid);
+		} else if (strcmp(arg, "-user") == 0) {
+			return parse_user(state, arg);
 		}
 		break;
 
diff --git a/tests.sh b/tests.sh
index e6b52be..baaac3e 100755
--- a/tests.sh
+++ b/tests.sh
@@ -239,7 +239,23 @@ function test_0042() {
     find_diff -L "$links" -lname '[AQ]' 2>/dev/null
 }
 
-for i in {1..42}; do
+function test_0043() {
+    find_diff -L "$basic" -user "$(id -un)"
+}
+
+function test_0044() {
+    find_diff -L "$basic" -user "$(id -u)"
+}
+
+function test_0045() {
+    find_diff -L "$basic" -group "$(id -gn)"
+}
+
+function test_0046() {
+    find_diff -L "$basic" -group "$(id -g)"
+}
+
+for i in {1..46}; do
     test="test_$(printf '%04d' $i)"
     "$test" "$dir"
     status=$?
-- 
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