maint: script diagnostics status cleanup

[debian/gzip] / gzip.c

diff --git a/gzip.c b/gzip.c
index 3d2aeafecc9674e9a76371198941846425545356..59ab553e448a157a267dcf2cd9eaf84d9f2ac903 100644 (file)
--- a/gzip.c
+++ b/gzip.c
@@ -29,10 +29,10 @@
  */
 
 static char const *const license_msg[] = {
-"Copyright (C) 2016 Free Software Foundation, Inc.",
+"Copyright (C) 2017 Free Software Foundation, Inc.",
 "Copyright (C) 1993 Jean-loup Gailly.",
 "This is free software.  You may redistribute copies of it under the terms of",
-"the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.",
+"the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.",
 "There is NO WARRANTY, to the extent permitted by law.",
 0};
 
@@ -77,6 +77,7 @@ static char const *const license_msg[] = {
 #include "ignore-value.h"
 #include "stat-time.h"
 #include "version.h"
+#include "xalloc.h"
 #include "yesno.h"
 
                 /* configuration */
@@ -194,10 +195,12 @@ static char *env;            /* contents of GZIP env variable */
 static char const *z_suffix; /* default suffix (can be set with --suffix) */
 static size_t z_len;         /* strlen(z_suffix) */
 
-/* The original timestamp (modification time).  Its tv_nsec component
-   is negative if the original time is unknown or is out of time_t
-   range; the latter can happen on hosts with 32-bit signed time_t
-   because the gzip format's MTIME is 32-bit unsigned.  */
+/* The original timestamp (modification time).  If the original is
+   unknown, TIME_STAMP.tv_nsec is negative.  If the original is
+   greater than struct timespec range, TIME_STAMP is the maximal
+   struct timespec value; this can happen on hosts with 32-bit signed
+   time_t because the gzip format's MTIME is 32-bit unsigned.
+   The original cannot be less than struct timespec range.  */
 struct timespec time_stamp;
 
 /* The set of signals that are caught.  */
@@ -302,7 +305,7 @@ static const struct option longopts[] =
 
 /* local functions */
 
-local void try_help     (void) ATTRIBUTE_NORETURN;
+local noreturn void try_help (void);
 local void help         (void);
 local void license      (void);
 local void version      (void);
@@ -322,7 +325,7 @@ local void copy_stat    (struct stat *ifstat);
 local void install_signal_handlers (void);
 local void remove_output_file (void);
 local RETSIGTYPE abort_gzip_signal (int);
-local void do_exit      (int exitcode) ATTRIBUTE_NORETURN;
+local noreturn void do_exit (int exitcode);
 static void finish_out (void);
       int main          (int argc, char **argv);
 static int (*work) (int infile, int outfile) = zip; /* function to call */
@@ -599,7 +602,7 @@ int main (int argc, char **argv)
         case '4' + ENV_OPTION:  case '5' + ENV_OPTION:  case '6' + ENV_OPTION:
         case '7' + ENV_OPTION:  case '8' + ENV_OPTION:  case '9' + ENV_OPTION:
             optc -= ENV_OPTION;
-            /* Fall through.  */
+            FALLTHROUGH;
         case '1':  case '2':  case '3':  case '4':
         case '5':  case '6':  case '7':  case '8':  case '9':
             level = optc - '0';
@@ -1180,9 +1183,12 @@ local char *get_suffix(name)
             break;
           }
       }
+
+    char *z_lower = xstrdup(z_suffix);
+    strlwr(z_lower);
     known_suffixes[suffix_of_builtin
                    ? sizeof known_suffixes / sizeof *known_suffixes - 2
-                   : 0] = z_suffix;
+                   : 0] = z_lower;
     suf = known_suffixes + suffix_of_builtin;
 
     nlen = strlen(name);
@@ -1193,15 +1199,18 @@ local char *get_suffix(name)
     }
     strlwr(suffix);
     slen = strlen(suffix);
+    char *match = NULL;
     do {
        int s = strlen(*suf);
        if (slen > s && ! ISSLASH (suffix[slen - s - 1])
            && strequ(suffix + slen - s, *suf)) {
-           return name+nlen-s;
+           match = name+nlen-s;
+           break;
        }
     } while (*++suf != NULL);
+    free(z_lower);
 
-    return NULL;
+    return match;
 }
 
 
@@ -1539,10 +1548,21 @@ local int get_method(in)
         stamp |= ((ulg)get_byte()) << 8;
         stamp |= ((ulg)get_byte()) << 16;
         stamp |= ((ulg)get_byte()) << 24;
-        if (!no_time && 0 < stamp && stamp <= TYPE_MAXIMUM (time_t))
+        if (stamp != 0 && !no_time)
           {
-            time_stamp.tv_sec = stamp;
-            time_stamp.tv_nsec = 0;
+            if (stamp <= TYPE_MAXIMUM (time_t))
+              {
+                time_stamp.tv_sec = stamp;
+                time_stamp.tv_nsec = 0;
+              }
+            else
+              {
+                WARN ((stderr,
+                       "%s: %s: MTIME %lu out of range for this platform\n",
+                       program_name, ifname, stamp));
+                time_stamp.tv_sec = TYPE_MAXIMUM (time_t);
+                time_stamp.tv_nsec = TIMESPEC_RESOLUTION - 1;
+              }
           }
 
         magic[8] = get_byte ();  /* Ignore extra flags.  */
@@ -1771,9 +1791,7 @@ local void do_list(ifd, method)
         static char const month_abbr[][4]
           = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
               "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
-        struct tm *tm = (time_stamp.tv_nsec < 0
-                         ? NULL
-                         : localtime (&time_stamp.tv_sec));
+        struct tm *tm = localtime (&time_stamp.tv_sec);
         printf ("%5s %08lx ", methods[method], crc);
         if (tm)
           printf ("%s%3d %02d:%02d ", month_abbr[tm->tm_mon],