From b550a5ba0261f3b6aba8988e37f1005102544568 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Mon, 1 Jul 2024 20:11:29 +0200 Subject: Add readlink and readmagiclink functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- readmagiclink.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 readmagiclink.c (limited to 'readmagiclink.c') diff --git a/readmagiclink.c b/readmagiclink.c new file mode 100644 index 0000000..160dd96 --- /dev/null +++ b/readmagiclink.c @@ -0,0 +1,61 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" +#ifndef TEST + + +char * +libsimple_readmagiclink(const char *path) +{ + int fd; + struct stat st; + char *target1; + char *target2; + + fd = open(path, O_PATH | O_NOFOLLOW); + if (fd < 0) + return NULL; + + target1 = libsimple_efreadlink(fd); + if (!strends(target1, " (deleted)")) { + close(fd); + return target1; + } + + if (fstat(fd, &st)) { + free(target1); + close(fd); + return NULL; + } + + target2 = libsimple_efreadlink(fd); + if (!strends(target2, " (deleted)")) { + free(target1); + close(fd); + return target2; + } + + close(fd); + + if (strcmp(target1, target2)) { + free(target2); + return target1; + } else { + free(target1); + if (st.st_nlink) + return target2; + target2[strlen(target2) - (sizeof(" (deleted)") - 1U)] = '\0'; + return target2; + } +} + + +#else +#include "test.h" + +int +main(void) /* TODO test */ +{ + return 0; +} + +#endif -- cgit v1.2.3-70-g09d2