'exit(1);' considered useless; perror; stdio; etc.
chris at umcp-cs.UUCP
chris at umcp-cs.UUCP
Mon Feb 6 16:05:23 AEST 1984
Speaking of "perror"... one thing I'd like to see is a ``%'' format
for printf that interprets an error number, so that I could say
(for example)
#include <stdio.h>
/*
* Log an error message, and print it to stderr too. 'err' is a Unix(tm)
* system error number (one of the beasts from <errno.h>).
*/
LogError (err) int err; {
static FILE *logfile;
/* Replace '#' with appropriate char. Can't use 'E', sigh. */
fprintf (stderr, "%#\n", err);
if (logfile || (logfile = fopen ("/foo/bar/errors", "a")))
fprintf (logfile, "%#\n", err);
}
Many times I've wanted to print the error message associated with
"errno" -- but not the way perror(3) prints it. I've had to fall
back on "extern char *sys_errlist[]; extern int sys_nerr;" hacks.
--
In-Real-Life: Chris Torek, Univ of MD Comp Sci
UUCP: {seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet: chris at umcp-cs ARPA: chris.umcp-cs at CSNet-Relay
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