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ps: favor truncation of long names over POSIX/UNIX standard

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The UNIX and POSIX standards require that user and
group names be printed as decimal integers when there
is insufficient room.  This has led to a constant
stream of bug reports.

With this commit, long names will be truncated and
displayed with a trailing visual clue.

To avoid truncation. the UNIX and POSIX way to change
column width is to rename the column:
   ps -o pid,user=CumbersomeUserNames -o comm

The easy way is to directly specify the desired width:
   ps -o pid,user:19,comm

Reference:
http://www.freelists.org/post/procps/rhbz737215-ps-does-not-resolve-some-user-names

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner
2012-09-17 15:30:45 -05:00
committed by Craig Small
parent faec340719
commit a65de0fd73
1 changed files with 8 additions and 2 deletions
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10
ps/output.c
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@@ -1075,7 +1075,9 @@ static int pr_fuid(char *restrict const outbuf, const proc_t *restrict const pp)
// The Open Group Base Specifications Issue 6 (IEEE Std 1003.1, 2004 Edition)
// requires that user and group names print as decimal numbers if there is
// not enough room in the column, so tough luck if you don't like it.
// not enough room in the column. However, we will now truncate such names
// and provide a visual hint of such truncation. Hopefully, this will reduce
// the volume of bug reports regarding that former 'feature'.
//
// The UNIX and POSIX way to change column width is to rename it:
// ps -o pid,user=CumbersomeUserNames -o comm
@@ -1092,6 +1094,11 @@ static int do_pr_name(char *restrict const outbuf, const char *restrict const na
if(len <= (int)max_rightward)
return len; /* returns number of cells */
len = max_rightward-1;
outbuf[len++] = '+';
outbuf[len] = 0;
return len;
}
return snprintf(outbuf, COLWID, "%u", u);
}
@@ -1108,7 +1115,6 @@ static int pr_fuser(char *restrict const outbuf, const proc_t *restrict const pp
static int pr_suser(char *restrict const outbuf, const proc_t *restrict const pp){
return do_pr_name(outbuf, pp->suser, pp->suid);
}
static int pr_egroup(char *restrict const outbuf, const proc_t *restrict const pp){
return do_pr_name(outbuf, pp->egroup, pp->egid);
}