aplay: Adjust buffer sizes to fix snprintf warnings

It also reduces compiled size slightly.

aplay.c: In function 'capture':
aplay.c:3055:34: error: '-01' directive output may be truncated writing 3
bytes into a region of size between 1 and 4097 [-Werror=format-truncation=
]
 3055 |    snprintf(namebuf, namelen, "%s-01", buf);
      |                                  ^~~
aplay.c:3055:4: note: 'snprintf' output between 4 and 4100 bytes into a
destination of size 4097
 3055 |    snprintf(namebuf, namelen, "%s-01", buf);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
aplay.c:3053:34: error: '-01.' directive output may be truncated writing 4
bytes into a region of size between 1 and 4097 [-Werror=format-truncation=
]
 3053 |    snprintf(namebuf, namelen, "%s-01.%s", buf, s);
      |                                  ^~~~
aplay.c:3053:4: note: 'snprintf' output 5 or more bytes (assuming 4101)
into a destination of size 4097
 3053 |    snprintf(namebuf, namelen, "%s-01.%s", buf, s);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
aplay.c:3065:34: error: '%02i' directive output may be truncated writing
between 2 and 10 bytes into a region of size between 0 and 4096 [-Werror=
format-truncation=]
 3065 |   snprintf(namebuf, namelen, "%s-%02i", buf, filecount);
      |                                  ^~~~
aplay.c:3065:30: note: directive argument in the range [1, 2147483647]
 3065 |   snprintf(namebuf, namelen, "%s-%02i", buf, filecount);
      |                              ^~~~~~~~~
aplay.c:3065:3: note: 'snprintf' output between 4 and 4108 bytes into a
destination of size 4097
 3065 |   snprintf(namebuf, namelen, "%s-%02i", buf, filecount);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
aplay.c:3063:34: error: '%02i' directive output may be truncated writing
between 2 and 10 bytes into a region of size between 0 and 4096 [-Werror=
format-truncation=]
 3063 |   snprintf(namebuf, namelen, "%s-%02i.%s", buf, filecount, s);
      |                                  ^~~~
aplay.c:3063:30: note: directive argument in the range [1, 2147483647]
 3063 |   snprintf(namebuf, namelen, "%s-%02i.%s", buf, filecount, s);
      |                              ^~~~~~~~~~~~
aplay.c:3063:3: note: 'snprintf' output 5 or more bytes (assuming 4109)
into a destination of size 4097
 3063 |   snprintf(namebuf, namelen, "%s-%02i.%s", buf, filecount, s);

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/aplay/aplay.c b/aplay/aplay.c
index 72fa5676172f7b13ccaa9c004b61a5968c7e5f2b..78adee2fa380c135eddea84b8cdd9cd2fb5033dd 100644 (file)
--- a/aplay/aplay.c
+++ b/aplay/aplay.c
@@ -3015,7 +3015,7 @@ static int new_capture_file(char *name, char *namebuf, size_t namelen,
                            int filecount)
 {
        char *s;
-       char buf[PATH_MAX+1];
+       char buf[PATH_MAX-10];
        time_t t;
        struct tm *tmp;
 
@@ -3122,7 +3122,7 @@ static void capture(char *orig_name)
        int tostdout=0;         /* boolean which describes output stream */
        int filecount=0;        /* number of files written */
        char *name = orig_name; /* current filename */
-       char namebuf[PATH_MAX+1];
+       char namebuf[PATH_MAX+2];
        off64_t count, rest;            /* number of bytes to capture */
        struct stat statbuf;