misc: consolidate version printing and close_stdout()

[thirdparty/util-linux.git] / misc-utils / namei.c

diff --git a/misc-utils/namei.c b/misc-utils/namei.c
index 41557cac304a257750fdc1110d2bc861d7661f45..9c5f5fa4ac3952423c1c5f9e4b4d3ae4b157c148 100644 (file)
--- a/misc-utils/namei.c
+++ b/misc-utils/namei.c
@@ -44,10 +44,6 @@
 #define MAXSYMLINKS 256
 #endif
 
-#ifndef LOGIN_NAME_MAX
-#define LOGIN_NAME_MAX 256
-#endif
-
 #define NAMEI_NOLINKS  (1 << 1)
 #define NAMEI_MODES    (1 << 2)
 #define NAMEI_MNTS     (1 << 3)
@@ -63,7 +59,7 @@ struct namei {
        struct namei    *next;          /* next item */
        int             level;
        int             mountpoint;     /* is mount point */
-       int             noent;          /* is this item not existing */
+       int             noent;          /* this item not existing (stores errno from stat()) */
 };
 
 static int flags;
@@ -155,9 +151,10 @@ new_namei(struct namei *parent, const char *path, const char *fname, int lev)
        nm->level = lev;
        nm->name = xstrdup(fname);
 
-       nm->noent = (lstat(path, &nm->st) == -1);
-       if (nm->noent)
+       if (lstat(path, &nm->st) != 0) {
+               nm->noent = errno;
                return nm;
+       }
 
        if (S_ISLNK(nm->st.st_mode))
                readlink_to_namei(nm, path);
@@ -284,11 +281,11 @@ print_namei(struct namei *nm, char *path)
                                blanks += 1;
                        blanks += nm->level * 2;
                        printf("%*s ", blanks, "");
-                       printf(_("%s - No such file or directory\n"), nm->name);
+                       printf("%s - %s\n", nm->name, strerror(nm->noent));
                        return -1;
                }
 
-               strmode(nm->st.st_mode, md);
+               xstrmode(nm->st.st_mode, md);
 
                if (nm->mountpoint)
                        md[0] = 'D';
@@ -324,10 +321,10 @@ print_namei(struct namei *nm, char *path)
        return 0;
 }
 
-static void usage(int rc)
+static void __attribute__((__noreturn__)) usage(void)
 {
        const char *p = program_invocation_short_name;
-       FILE *out = rc == EXIT_FAILURE ? stderr : stdout;
+       FILE *out = stdout;
 
        if (!*p)
                p = "namei";
@@ -340,30 +337,30 @@ static void usage(int rc)
        fputs(_("Follow a pathname until a terminal point is found.\n"), out);
 
        fputs(USAGE_OPTIONS, out);
-       fputs(_(" -h, --help          displays this help text\n"
-               " -V, --version       output version information and exit\n"
+       fputs(_(
                " -x, --mountpoints   show mount point directories with a 'D'\n"
                " -m, --modes         show the mode bits of each file\n"
                " -o, --owners        show owner and group name of each file\n"
                " -l, --long          use a long listing format (-m -o -v) \n"
                " -n, --nosymlinks    don't follow symlinks\n"
                " -v, --vertical      vertical align of modes and owners\n"), out);
+       printf(USAGE_HELP_OPTIONS(21));
 
-       fprintf(out, USAGE_MAN_TAIL("namei(1)"));
-       exit(rc);
+       printf(USAGE_MAN_TAIL("namei(1)"));
+       exit(EXIT_SUCCESS);
 }
 
 static const struct option longopts[] =
 {
-       { "help",       0, 0, 'h' },
-       { "version",    0, 0, 'V' },
-       { "mountpoints",0, 0, 'x' },
-       { "modes",      0, 0, 'm' },
-       { "owners",     0, 0, 'o' },
-       { "long",       0, 0, 'l' },
-       { "nolinks",    0, 0, 'n' },
-       { "vertical",   0, 0, 'v' },
-       { NULL,         0, 0, 0 },
+       { "help",        no_argument, NULL, 'h' },
+       { "version",     no_argument, NULL, 'V' },
+       { "mountpoints", no_argument, NULL, 'x' },
+       { "modes",       no_argument, NULL, 'm' },
+       { "owners",      no_argument, NULL, 'o' },
+       { "long",        no_argument, NULL, 'l' },
+       { "nolinks",     no_argument, NULL, 'n' },
+       { "vertical",    no_argument, NULL, 'v' },
+       { NULL, 0, NULL, 0 },
 };
 
 int
@@ -375,16 +372,10 @@ main(int argc, char **argv)
        setlocale(LC_ALL, "");
        bindtextdomain(PACKAGE, LOCALEDIR);
        textdomain(PACKAGE);
-       atexit(close_stdout);
+       close_stdout_atexit();
 
        while ((c = getopt_long(argc, argv, "hVlmnovx", longopts, NULL)) != -1) {
                switch(c) {
-               case 'h':
-                       usage(EXIT_SUCCESS);
-                       break;
-               case 'V':
-                       printf(UTIL_LINUX_VERSION);
-                       return EXIT_SUCCESS;
                case 'l':
                        flags |= (NAMEI_OWNERS | NAMEI_MODES | NAMEI_VERTICAL);
                        break;
@@ -403,14 +394,19 @@ main(int argc, char **argv)
                case 'v':
                        flags |= NAMEI_VERTICAL;
                        break;
+
+               case 'h':
+                       usage();
+               case 'V':
+                       print_version(EXIT_SUCCESS);
                default:
-                       usage(EXIT_FAILURE);
+                       errtryhelp(EXIT_FAILURE);
                }
        }
 
        if (optind == argc) {
                warnx(_("pathname argument is missing"));
-               usage(EXIT_FAILURE);
+               errtryhelp(EXIT_FAILURE);
        }
 
        ucache = new_idcache();