refactor passwd file access code

this allows getpwnam and getpwuid to share code with the _r versions
in preparation for alternate backend support.

1 files changed, 31 insertions, 0 deletions

diff --git a/src/passwd/getpw_a.c b/src/passwd/getpw_a.c
new file mode 100644
index 00000000..21efc5ca
--- /dev/null
+++ b/src/passwd/getpw_a.c
@@ -0,0 +1,31 @@
+#include "pwf.h"
+#include <pthread.h>
+
+int __getpw_a(const char *name, uid_t uid, struct passwd *pw, char **buf, size_t *size, struct passwd **res)
+{
+	FILE *f;
+	int cs;
+	int rv = 0;
+
+	*res = 0;
+
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
+
+	f = fopen("/etc/passwd", "rbe");
+	if (!f) {
+		rv = errno;
+		goto done;
+	}
+
+	while (!(rv = __getpwent_a(f, pw, buf, size, res)) && *res) {
+		if (name && !strcmp(name, (*res)->pw_name)
+		|| !name && (*res)->pw_uid == uid)
+			break;
+	}
+	fclose(f);
+
+done:
+	pthread_setcancelstate(cs, 0);
+	if (rv) errno = rv;
+	return rv;
+}