{"id":2223679,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2223679/?format=json","web_url":"http://patchwork.ozlabs.org/project/ltp/patch/20260416005603.22427-2-wegao@suse.com/","project":{"id":59,"url":"http://patchwork.ozlabs.org/api/1.1/projects/59/?format=json","name":"Linux Test Project development","link_name":"ltp","list_id":"ltp.lists.linux.it","list_email":"ltp@lists.linux.it","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260416005603.22427-2-wegao@suse.com>","date":"2026-04-16T00:55:22","name":"[v8,1/2] lib: New library function tst_get_free_uid","commit_ref":null,"pull_url":null,"state":"needs-review-ack","archived":false,"hash":"5922c9562177c84a0f80be67393323111339f9b3","submitter":{"id":85577,"url":"http://patchwork.ozlabs.org/api/1.1/people/85577/?format=json","name":"Wei Gao","email":"wegao@suse.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/ltp/patch/20260416005603.22427-2-wegao@suse.com/mbox/","series":[{"id":500061,"url":"http://patchwork.ozlabs.org/api/1.1/series/500061/?format=json","web_url":"http://patchwork.ozlabs.org/project/ltp/list/?series=500061","date":"2026-04-16T00:55:21","name":"open16: allow restricted O_CREAT of FIFOs and regular files","version":8,"mbox":"http://patchwork.ozlabs.org/series/500061/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223679/comments/","check":"warning","checks":"http://patchwork.ozlabs.org/api/patches/2223679/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","ltp@lists.linux.it"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","ltp@picard.linux.it"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=lists.linux.it header.i=@lists.linux.it\n header.a=rsa-sha256 header.s=picard header.b=RtLVL16v;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=suse.com header.i=@suse.com header.a=rsa-sha256\n header.s=google header.b=ZfFfIfTq;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=2001:1418:10:5::2; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it","Sender":"\"ltp\" "},"content":"Add tst_get_free_uid() to dynamically find unused UIDs for tests.\n\nSigned-off-by: Wei Gao \n---\n include/tst_uid.h | 7 +++++--\n lib/tst_uid.c | 26 ++++++++++++++++++++++++++\n 2 files changed, 31 insertions(+), 2 deletions(-)","diff":"diff --git a/include/tst_uid.h b/include/tst_uid.h\nindex 2237ddcbf..394cb3edc 100644\n--- a/include/tst_uid.h\n+++ b/include/tst_uid.h\n@@ -8,10 +8,13 @@\n #include \n \n /*\n- * Find unassigned gid. The skip argument can be used to ignore e.g. the main\n+ * Find unassigned uid/gid. The skip argument can be used to ignore e.g. the main\n * group of a specific user in case it's not listed in the group file. If you\n- * do not need to skip any specific gid, simply set it to 0.\n+ * do not need to skip any specific id, simply set it to 0.\n */\n+uid_t tst_get_free_uid_(const char *file, const int lineno, uid_t skip);\n+#define tst_get_free_uid(skip) tst_get_free_uid_(__FILE__, __LINE__, (skip))\n+\n gid_t tst_get_free_gid_(const char *file, const int lineno, gid_t skip);\n #define tst_get_free_gid(skip) tst_get_free_gid_(__FILE__, __LINE__, (skip))\n \ndiff --git a/lib/tst_uid.c b/lib/tst_uid.c\nindex af4ef8cf7..deff17085 100644\n--- a/lib/tst_uid.c\n+++ b/lib/tst_uid.c\n@@ -5,6 +5,7 @@\n \n #include \n #include \n+#include \n #include \n \n #define TST_NO_DEFAULT_MAIN\n@@ -12,6 +13,31 @@\n #include \"tst_uid.h\"\n \n #define MAX_GID 32767\n+#define MAX_UID 32767\n+\n+uid_t tst_get_free_uid_(const char *file, const int lineno, uid_t skip)\n+{\n+\tuid_t ret;\n+\n+\terrno = 0;\n+\n+\tfor (ret = 1; ret < MAX_UID; ret++) {\n+\t\tif (ret == skip || getpwuid(ret))\n+\t\t\tcontinue;\n+\n+\t\tif (errno == 0 || errno == ENOENT || errno == ESRCH) {\n+\t\t\ttst_res_(file, lineno, TINFO | TERRNO,\n+\t\t\t\t\"Found unused UID %d\", (int)ret);\n+\t\t\treturn ret;\n+\t\t}\n+\n+\t\ttst_brk_(file, lineno, TBROK|TERRNO, \"User ID lookup failed\");\n+\t\treturn (uid_t)-1;\n+\t}\n+\n+\ttst_brk_(file, lineno, TBROK, \"No free user ID found\");\n+\treturn (uid_t)-1;\n+}\n \n gid_t tst_get_free_gid_(const char *file, const int lineno, gid_t skip)\n {\n","prefixes":["v8","1/2"]}