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1 | /* |
2 | * @(#)err 5.1 (Berkeley) %G% | |
3 | * | |
4 | * Error routines can be tricky. The following works in most cases, | |
5 | * and can be easily adapted per program. It allows both: | |
6 | * | |
7 | * if ((fp = fopen(file, "r")) == NULL) | |
8 | * err("%s: %s", file, strerror(errno)); | |
9 | * and: | |
10 | * if ((p = malloc(sizeof(int))) == NULL) | |
11 | * err("%s", strerror(errno)); | |
12 | * | |
13 | * Never use perror(3). | |
14 | */ | |
15 | #if __STDC__ | |
16 | #include <stdarg.h> | |
17 | #else | |
18 | #include <varargs.h> | |
19 | #endif | |
20 | ||
21 | void | |
22 | #if __STDC__ | |
23 | err(const char *fmt, ...) | |
24 | #else | |
25 | err(fmt, va_alist) | |
26 | char *fmt; | |
27 | va_dcl | |
28 | #endif | |
29 | { | |
30 | va_list ap; | |
31 | #if __STDC__ | |
32 | va_start(ap, fmt); | |
33 | #else | |
34 | va_start(ap); | |
35 | #endif | |
36 | (void)fprintf(stderr, "program: "); | |
37 | (void)vfprintf(stderr, fmt, ap); | |
38 | va_end(ap); | |
39 | (void)fprintf(stderr, "\n"); | |
40 | exit(1); | |
41 | /* NOTREACHED */ | |
42 | } |