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#include <stdio.h> void perror(const char *string); |
This function formats an error message and prints it to stderr
.
The message is the string, a colon and a blank, and a message
suitable for the error condition indicated by errno
.
If string is a null pointer or points to a null string,
the colon and blank are not printed.
None.
ANSI/ISO C | C89; C99 |
POSIX | 1003.2-1992; 1003.1-2001 |
int x = open("foo", O_RDONLY); if (x < 0) { perror("foo"); exit(1); } |