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authorDenis Vlasenko2007-06-10 17:11:59 +0000
committerDenis Vlasenko2007-06-10 17:11:59 +0000
commit5a65447e3090908b4bad645c84e37298ca7a7449 (patch)
tree1fb67f517a8519f92e5d5c9876685823dff5b236 /libbb/procps.c
parente8a0788b249cbac5bf5b2aa2d81bb8f6b29a7a4b (diff)
downloadbusybox-5a65447e3090908b4bad645c84e37298ca7a7449.zip
busybox-5a65447e3090908b4bad645c84e37298ca7a7449.tar.gz
top: add config option and code for global CPU % display
Diffstat (limited to 'libbb/procps.c')
-rw-r--r--libbb/procps.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/libbb/procps.c b/libbb/procps.c
index be0d61b..1e2495a 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -79,8 +79,15 @@ const char* get_cached_groupname(gid_t gid)
static int read_to_buf(const char *filename, void *buf)
{
- ssize_t ret;
- ret = open_read_close(filename, buf, PROCPS_BUFSIZE-1);
+ int fd;
+ /* open_read_close() would do two reads, checking for EOF.
+ * When you have 10000 /proc/$NUM/stat to read, it isn't desirable */
+ ssize_t ret = -1;
+ fd = open(filename, O_RDONLY);
+ if (fd >= 0) {
+ ret = read(fd, buf, PROCPS_BUFSIZE-1);
+ close(fd);
+ }
((char *)buf)[ret > 0 ? ret : 0] = '\0';
return ret;
}