extendedperror(3C)
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extendedperror function
Print an error message on stderr.
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Calling Sequence
void extendedperror();
char *string;
extendedperror(string);
where string is a pointer to a null terminated string that
is printed (along with a colon) before the error
message is printed.
Description
The extended_perror function prints to the standard error file a
string and an error message corresponding to the last DG/UX
extended error with the dg_ext_errno function. If no extended
error message is available, nothing is printed.
Returns
The extended_perror function returns no value.
Related Functions
See also the perror function.
Example
The following program copies data from the tape drive to the
standard output. If an error occurs, the extended_perror
function prints an error message.
/* Program test for the extended_perror() function */
#include <fcntl.h>
#define MBUF 32768
#define STDOUT 1
char buf[MBUF];
void perror(), extended_perror();
DG/UX 4.00 Page 1
Licensed material--property of copyright holder(s)
extendedperror(3C)
int read(), write();
main() {
int len, fd = open("/dev/rmt/0", O_RDONLY);
if (fd == -1) {
perror("Open of /dev/rmt/0");
return 1;
}
while ((len = read(fd, buf, MBUF)) > 0) {
if (write(STDOUT, buf, len) < 0) {
perror("Write to stdout");
return 1;
}
}
if (len < 0) {
extended_perror("Read of /dev/rmt/0");
return 1;
}
return 0;
}
DG/UX 4.00 Page 2
Licensed material--property of copyright holder(s)