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Commit | Line | Data |
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0c1f3509 MG |
1 | #include <errno.h> |
2 | #include <stdarg.h> | |
3 | #include <stdio.h> | |
4 | #include <stdlib.h> | |
5 | #include <string.h> | |
6 | ||
7 | #include "warnp.h" | |
8 | ||
9 | static int initialized = 0; | |
10 | static char * name = NULL; | |
11 | ||
12 | /* Free the name string. */ | |
13 | static void | |
14 | done(void) | |
15 | { | |
16 | ||
17 | free(name); | |
18 | name = NULL; | |
19 | } | |
20 | ||
21 | /** | |
22 | * warnp_setprogname(progname): | |
23 | * Set the program name to be used by warn() and warnx() to ${progname}. | |
24 | */ | |
25 | void | |
26 | warnp_setprogname(const char * progname) | |
27 | { | |
28 | const char * p; | |
29 | ||
30 | /* Free the name if we already have one. */ | |
31 | free(name); | |
32 | ||
33 | /* Find the last segment of the program name. */ | |
34 | for (p = progname; progname[0] != '\0'; progname++) | |
35 | if (progname[0] == '/') | |
36 | p = progname + 1; | |
37 | ||
38 | /* Copy the name string. */ | |
39 | name = strdup(p); | |
40 | ||
41 | /* If we haven't already done so, register our exit handler. */ | |
42 | if (initialized == 0) { | |
43 | atexit(done); | |
44 | initialized = 1; | |
45 | } | |
46 | } | |
47 | ||
48 | void | |
49 | warn(const char * fmt, ...) | |
50 | { | |
51 | va_list ap; | |
52 | ||
53 | va_start(ap, fmt); | |
54 | fprintf(stderr, "%s", (name != NULL) ? name : "(unknown)"); | |
55 | if (fmt != NULL) { | |
56 | fprintf(stderr, ": "); | |
57 | vfprintf(stderr, fmt, ap); | |
58 | } | |
59 | fprintf(stderr, ": %s\n", strerror(errno)); | |
60 | va_end(ap); | |
61 | } | |
62 | ||
63 | void | |
64 | warnx(const char * fmt, ...) | |
65 | { | |
66 | va_list ap; | |
67 | ||
68 | va_start(ap, fmt); | |
69 | fprintf(stderr, "%s", (name != NULL) ? name : "(unknown)"); | |
70 | if (fmt != NULL) { | |
71 | fprintf(stderr, ": "); | |
72 | vfprintf(stderr, fmt, ap); | |
73 | } | |
74 | fprintf(stderr, "\n"); | |
75 | va_end(ap); | |
76 | } |