neubauer@bsu-cs.bsu.edu (Paul Neubauer) (05/09/89)
I tried to compile Joel Spolsky's vt100clock program from Vol. 6, Issue 98,
archived as clock.msk. I am running on a BSD 4.3 system, if that is any
help. The command 'cc vt100clock.c' produced the output:
Undefined:
_cuserid
Joel #includes a number of the usual sorts of .h files, but none of them
contain cuserid(), in fact, a grep of /usr/include and /usr/include/sys gave
me no clue about the function or what it does. I assume that it is a SysV
function, but a quick look at the ATT SysV Programmers Guide (I don't have
the books in front of me so that may not be a completely accurate title)
(Vols. I and II) also did not find cuserid() in the index. It shows up in
two places in Joel's program:
/* remember where mail is kept */
sprintf(path, MAILFILE, cuserid(NULL));
and
/* check mail */
old_size = new_size;
if (!stat(sprintf(path, MAILFILE, cuserid(NULL)), &st))
new_size = st.st_size;
else
new_size = 0;
Can anybody tell me (1) what it does, (2) if there is a BSD equivalent or
near-equivalent, and/or (3) what to do about it?
Thanks much.
--
Paul Neubauer neubauer@bsu-cs.bsu.edu neubauer@bsu-cs.UUCP
<backbones>!{iuvax,pur-ee}!bsu-cs!neubauerdold@mitisft.Convergent.COM (Clarence Dold) (05/10/89)
in article <7150@bsu-cs.bsu.edu>, neubauer@bsu-cs.bsu.edu (Paul Neubauer) says: > I tried to compile Joel Spolsky's vt100clock program from Vol. 6, Issue 98, > archived as clock.msk. I am running on a BSD 4.3 system, if that is any > help. The command 'cc vt100clock.c' produced the output: > Undefined: > _cuserid > Can anybody tell me (1) what it does, (2) if there is a BSD equivalent or > near-equivalent, and/or (3) what to do about it? It returns the LOGNAME, used to find /usr/mail/LOGNAME mail storage file. You might be able to derive it from a getenv of LOGNAME or ... I also changed the line signal(SIGINT,clear&exit) to trap to a null function on SIGINT so that the clock wouldn't go away when I interrupted a program. I'm running SysV 3.0, and I don't get the 'mail' prompt, just the clock. I went to sdb, which is kind of hard(?) on a program that is in background. Thanks Joel. I don't even care about the mail stuff, the clock is great. -- --- Clarence A Dold - dold@tsmiti.Convergent.COM (408) 434-5293 ...pyramid!ctnews!tsmiti!dold P.O.Box 6685, San Jose, CA 95150-6685 MS#10-007
jeff@quark.WV.TEK.COM (Jeff Beadles;X2568;61-215) (05/11/89)
In article <7150@bsu-cs.bsu.edu> neubauer@bsu-cs.bsu.edu (Paul Neubauer) writes: >I tried to compile Joel Spolsky's vt100clock program from Vol. 6, Issue 98, >archived as clock.msk. I am running on a BSD 4.3 system, if that is any >help. The command 'cc vt100clock.c' produced the output: >Undefined: >_cuserid >Can anybody tell me (1) what it does, (2) if there is a BSD equivalent or >near-equivalent, and/or (3) what to do about it? >Thanks much. Well, here's what I have in my manual... cuserid(3S) #include <stdio.h> char *cuserid(s) char *s; Generate a string representation of the login name of the owner of the current process. If s is a NULL pointer, then cuserid will allocate space for the login name. If not, then cuserid expects s to be an array of at least L_cuserid characters. (Defined in stdio.h) If an error, a null pointer is returned if called with a null pointer, else s[0]='\0' Something could be easily make with getpwuid(getuid()) to return the desired results. -Jeff -- Jeff Beadles Utek Sustaining Engineering, Tektronix Inc. jeff@quark.WV.TEK.COM
guy@auspex.auspex.com (Guy Harris) (05/12/89)
>Something could be easily make with getpwuid(getuid()) to return the >desired results. Call "getlogin()" first, and if that fails use "getpwuid()" - that's what "cuserid()" does.