diff mbox series

Fix parsing of /sys/devices/system/cpu/online (bug 27038)

Message ID 87im9b3wbi.fsf@igel.home
State Committed
Commit b5eeca8cfd9d0fd92b5633a88901d9ff27f2b496
Headers
Series Fix parsing of /sys/devices/system/cpu/online (bug 27038) |

Commit Message

Andreas Schwab Dec. 9, 2020, 2:09 p.m. UTC 
  The file contains comma-separated ranges, not spaces.
---
 sysdeps/unix/sysv/linux/getsysstats.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Comments

Florian Weimer Dec. 9, 2020, 2:15 p.m. UTC | #1 
* Andreas Schwab:

> The file contains comma-separated ranges, not spaces.

Bug 27038 is a duplicate of bug 25859.

> ---
>  sysdeps/unix/sysv/linux/getsysstats.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c
> index 1ef077f9af..a9069b7056 100644
> --- a/sysdeps/unix/sysv/linux/getsysstats.c
> +++ b/sysdeps/unix/sysv/linux/getsysstats.c
> @@ -143,6 +143,7 @@ __get_nprocs (void)
>    char *re = buffer_end;
>  
>    const int flags = O_RDONLY | O_CLOEXEC;
> +  /* This file contains comma-separated ranges.  */
>    int fd = __open_nocancel ("/sys/devices/system/cpu/online", flags);
>    char *l;
>    int result = 0;
> @@ -175,10 +176,10 @@ __get_nprocs (void)
>  	    result += m - n + 1;
>  
>  	    l = endp;
> -	    while (l < re && isspace (*l))
> +	    if (l < re && *l == ',')
>  	      ++l;
>  	  }
> -	while (l < re);
> +	while (l < re && *l != '\n');
>  
>        __close_nocancel_nostatus (fd);
>  
> -- 

The actual patch looks okay to me.

Thanks,
Florian
diff mbox series

Patch

diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c
index 1ef077f9af..a9069b7056 100644
--- a/sysdeps/unix/sysv/linux/getsysstats.c
+++ b/sysdeps/unix/sysv/linux/getsysstats.c
@@ -143,6 +143,7 @@  __get_nprocs (void)
   char *re = buffer_end;
 
   const int flags = O_RDONLY | O_CLOEXEC;
+  /* This file contains comma-separated ranges.  */
   int fd = __open_nocancel ("/sys/devices/system/cpu/online", flags);
   char *l;
   int result = 0;
@@ -175,10 +176,10 @@  __get_nprocs (void)
 	    result += m - n + 1;
 
 	    l = endp;
-	    while (l < re && isspace (*l))
+	    if (l < re && *l == ',')
 	      ++l;
 	  }
-	while (l < re);
+	while (l < re && *l != '\n');
 
       __close_nocancel_nostatus (fd);