From f0c28504a9877be5da3ed1215f2da2d5914bbb0b Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Wed, 7 Jul 2021 18:33:52 +0200 Subject: nss_files: Allocate nscd file registration data on the heap This is only needed if nss_files is loaded by nscd. Before: text data bss dec hex filename 767 0 24952 25719 6477 nss/files-init.os After: text data bss dec hex filename 666 0 0 666 29a nss/files-init.os Using PATH_MAX bytes unconditionally for the directory name is wasteful, but fixing that would constitute another break of this semi-public ABI. (The other issue is that with symbolic links, an arbitrary set of parent directories may need watching, not just a single one.) Reviewed-by: Adhemerval Zanella --- nss/nss_files/files-init.c | 54 +++++++++++++++++----------------------------- 1 file changed, 20 insertions(+), 34 deletions(-) (limited to 'nss') diff --git a/nss/nss_files/files-init.c b/nss/nss_files/files-init.c index cc22330640..717c9fd334 100644 --- a/nss/nss_files/files-init.c +++ b/nss/nss_files/files-init.c @@ -24,44 +24,30 @@ NSS_DECLARE_MODULE_FUNCTIONS (files) -#define PWD_FILENAME "/etc/passwd" -define_traced_file (pwd, PWD_FILENAME); - -#define GRP_FILENAME "/etc/group" -define_traced_file (grp, GRP_FILENAME); - -#define HST_FILENAME "/etc/hosts" -define_traced_file (hst, HST_FILENAME); - -#define RESOLV_FILENAME "/etc/resolv.conf" -define_traced_file (resolv, RESOLV_FILENAME); - -#define SERV_FILENAME "/etc/services" -define_traced_file (serv, SERV_FILENAME); - -#define NETGR_FILENAME "/etc/netgroup" -define_traced_file (netgr, NETGR_FILENAME); +static void +register_file (void (*cb) (size_t, struct traced_file *), + int db, const char *path, int crinit) +{ + size_t pathlen = strlen (path) + 1; + struct traced_file *file = malloc (sizeof (struct traced_file) + pathlen); + /* Do not register anything on memory allocation failure. nscd will + fail soon anyway. */ + if (file != NULL) + { + init_traced_file (file, path, crinit); + cb (db, file); + } +} void _nss_files_init (void (*cb) (size_t, struct traced_file *)) { - init_traced_file (&pwd_traced_file.file, PWD_FILENAME, 0); - cb (pwddb, &pwd_traced_file.file); - - init_traced_file (&grp_traced_file.file, GRP_FILENAME, 0); - cb (grpdb, &grp_traced_file.file); - - init_traced_file (&hst_traced_file.file, HST_FILENAME, 0); - cb (hstdb, &hst_traced_file.file); - - init_traced_file (&resolv_traced_file.file, RESOLV_FILENAME, 1); - cb (hstdb, &resolv_traced_file.file); - - init_traced_file (&serv_traced_file.file, SERV_FILENAME, 0); - cb (servdb, &serv_traced_file.file); - - init_traced_file (&netgr_traced_file.file, NETGR_FILENAME, 0); - cb (netgrdb, &netgr_traced_file.file); + register_file (cb, pwddb, "/etc/passwd", 0); + register_file (cb, grpdb, "/etc/group", 0); + register_file (cb, hstdb, "/etc/hosts", 0); + register_file (cb, hstdb, "/etc/resolv.conf", 1); + register_file (cb, servdb, "/etc/services", 0); + register_file (cb, netgrdb, "/etc/netgroup", 0); } #endif -- cgit v1.2.3