1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/* Asp Address Search Protocol Client (file: asplib.c) */
/* Copyright (C) 1996-97 Stenio Brunetta */
/* */
/* This program is free software; you can redistribute it and/or modify */
/* it under the terms of the GNU General Public License as published by */
/* the Free Software Foundation; either version 2 of the License, or */
/* (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* */
/* Author's addresses: */
/* email: brunetta@tin.it, stebrune@dsi.unive.it */
static char rcsid[] = "$Id: asplib.c,v 1.20 1998/02/18 16:09:40 ste Exp $";
#include "asp.h"
void avoid_asplib_rcsid_warning(void){
rcsid[0] = 0;
}
#ifndef HAVE_GETHOSTNAME
# ifdef HAVE_UNAME
int gethostname(char* name, size_t len){
struct utsname buf;
if(uname(&buf) == -1) return -1;
strncpy(name, buf.nodename, len);
return 0;
}
# else
int gethostname(char* name, size_t len){
if((name = getenv("HOSTNAME")) == NULL || \
strcmp(name, "") == 0) return -1;
return 0;
}
# endif
#endif
#ifndef HAVE_STRERROR
# ifdef HAVE_SYS_ERRLIST_DECL
char* strerror(int errnum){
static char message[32];
extern char *const sys_errlist[];
if(errnum > 0 && errnum < sys_nerr)
return sys_errlist[errnum];
else{
if(errnum == 0)
strcpy(message, "Unknown error");
else sprintf(message, "Unknown error %d", errnum);
return message;
}
}
# else
char* strerror(int errnum){
static char message[32];
sprintf(message, "errno %d", errnum);
return message;
}
# endif
#endif
#ifndef HAVE_STRSIGNAL
# ifdef SYS_SIGLIST_DECLARED
char* strsignal(int errnum){
static char message[32];
#ifndef NSIG
#define NSIG 32
#endif
if(errnum > 0 && errnum < NSIG)
return sys_siglist[errnum];
else{
if(errnum == 0)
strcpy(message, "Unknown signal");
else sprintf(message, "Unknown signal %d", errnum);
return message;
}
}
# else
char *strsignal(int sig){
static char message[32];
sprintf(message, "signal %d", sig);
return message;
}
# endif
#endif
/* Restituisce un puntatore a size caratteri allocato dinamicamente
con malloc. Stampa la stringa s ed un diagnostico ed esce in caso
manchi la memoria.
Usa: prog_name */
void* emalloc(int size, char* s){
void* p;
if((p = malloc(size*sizeof(char))) == NULL){
fprintf(stderr, "%s: %s: virtual memory exausted\n", prog_name, s);
exit(EXIT_FAILURE);
}
return p;
}
/* Controlla se la stringa puntata da sz e` un intero compreso tra min
e max. In caso affermativo mette l'intero in dest e restituisce 0;
-1 altrimenti. */
int bound_check(char* sz, int min, int max, int* dest){
char* endp;
long l;
errno = 0;
l = strtol(sz, &endp, 10);
if(errno == ERANGE || \
strcmp(endp, "") != 0 || \
l < min || l > max) return -1;
*dest = l;
return 0;
}
/* Crea una nuova stringa combinazione della l e della r, interponendo
il carattere / eliminando eventuali / duplicati. */
char* combine(char* l, char* r){
char* res;
int len_l, len_r;
len_l = strlen(l);
len_r = strlen(r);
if(*(l+len_l-1) == '/'){
if(*r == '/'){
res = emalloc(len_l+len_r, "combine");
strcpy(res, l);
strcpy(res+len_l, r+1);
}else{
res = emalloc(len_l+len_r+1, "combine");
strcpy(res, l);
strcpy(res+len_l, r);
}
}else{
if(*r == '/'){
res = emalloc(len_l+len_r+1, "combine");
strcpy(res, l);
strcpy(res+len_l, r);
}else{
res = emalloc(len_l+len_r+2, "combine");
strcpy(res, l);
*(res+len_l) = '/';
strcpy(res+len_l+1, r);
}
}
return res;
}
/* Restituisce una stringa allocata dinamicamente con malloc in cui
viene espansa la ~ se c'e`. */
char* tilde_expand(char* sz){
char *home;
struct passwd *entry;
if(*sz == '~'){ /* sz e` del tipo ~... */
if(*(sz+1) == '\0') /* sz e` solo la ~ */
if((home = getenv("HOME")) == NULL || strcmp(home, "") == 0){
fprintf(stderr, "%s: getenv: No home dir set", prog_name);
exit(EXIT_FAILURE);
}else return getenv("HOME");
if(*(sz+1) == '/'){ /* sz e` del tipo ~/... */
if((home = getenv("HOME")) == NULL || strcmp(home, "") == 0){
fprintf(stderr, "%s: getenv: No home dir set", prog_name);
exit(EXIT_FAILURE);
}
return combine(home, sz+1);
}else{ /* sz e` del tipo ~user... */
char *p, *p1;
p = strchr(sz, '/');
if(p != NULL){ /* sz e` del tipo ~user/... */
p1 = emalloc(p-sz, "tilde_expand");
strncpy(p1, sz+1, p-sz-1);
*(p1+(p-sz-1)) = '\0';
entry = getpwnam(p1);
free(p1);
return combine(entry->pw_dir, p+1);
}else{ /* sz e` del tipo ~user */
p1 = emalloc(strlen(sz), "tilde_expand");
strcpy(p1, sz+1);
entry = getpwnam(p1);
free(p1);
return entry->pw_dir;
}
}
}else
return strcpy(emalloc(strlen(sz)+1, "tilde_expand"), sz);
}
/* Usa: prog_name */
void asp_perror(char* s){
fprintf(stderr, "%s: ", prog_name);
perror(s);
exit(EXIT_FAILURE);
}
|
