1 /** \ingroup popt
2 * \file popt/poptconfig.c
3 */
4
5 /* (C) 1998-2002 Red Hat, Inc. -- Licensing details are in the COPYING
6 file accompanying popt source distributions, available from
7 ftp://ftp.rpm.org/pub/rpm/dist. */
8
9 #include "system.h"
10 #include "poptint.h"
11 /*@access poptContext @*/
12
13 /*@-compmempass@*/ /* FIX: item->option.longName kept, not dependent. */
configLine(poptContext con,char * line)14 static void configLine(poptContext con, char * line)
15 /*@modifies con @*/
16 {
17 size_t nameLength;
18 const char * entryType;
19 const char * opt;
20 poptItem item = alloca(sizeof(*item));
21 int i, j;
22
23 if (con->appName == NULL)
24 return;
25 nameLength = strlen(con->appName);
26
27 /*@-boundswrite@*/
28 memset(item, 0, sizeof(*item));
29
30 if (strncmp(line, con->appName, nameLength)) return;
31
32 line += nameLength;
33 if (*line == '\0' || !isspace(*line)) return;
34
35 while (*line != '\0' && isspace(*line)) line++;
36 entryType = line;
37 while (*line == '\0' || !isspace(*line)) line++;
38 *line++ = '\0';
39
40 while (*line != '\0' && isspace(*line)) line++;
41 if (*line == '\0') return;
42 opt = line;
43 while (*line == '\0' || !isspace(*line)) line++;
44 *line++ = '\0';
45
46 while (*line != '\0' && isspace(*line)) line++;
47 if (*line == '\0') return;
48
49 /*@-temptrans@*/ /* FIX: line alias is saved */
50 if (opt[0] == '-' && opt[1] == '-')
51 item->option.longName = opt + 2;
52 else if (opt[0] == '-' && opt[2] == '\0')
53 item->option.shortName = opt[1];
54 /*@=temptrans@*/
55
56 if (poptParseArgvString(line, &item->argc, &item->argv)) return;
57
58 /*@-modobserver@*/
59 item->option.argInfo = POPT_ARGFLAG_DOC_HIDDEN;
60 for (i = 0, j = 0; i < item->argc; i++, j++) {
61 const char * f;
62 if (!strncmp(item->argv[i], "--POPTdesc=", sizeof("--POPTdesc=")-1)) {
63 f = item->argv[i] + sizeof("--POPTdesc=");
64 if (f[0] == '$' && f[1] == '"') f++;
65 item->option.descrip = f;
66 item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
67 j--;
68 } else
69 if (!strncmp(item->argv[i], "--POPTargs=", sizeof("--POPTargs=")-1)) {
70 f = item->argv[i] + sizeof("--POPTargs=");
71 if (f[0] == '$' && f[1] == '"') f++;
72 item->option.argDescrip = f;
73 item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
74 item->option.argInfo |= POPT_ARG_STRING;
75 j--;
76 } else
77 if (j != i)
78 item->argv[j] = item->argv[i];
79 }
80 if (j != i) {
81 item->argv[j] = NULL;
82 item->argc = j;
83 }
84 /*@=modobserver@*/
85 /*@=boundswrite@*/
86
87 /*@-nullstate@*/ /* FIX: item->argv[] may be NULL */
88 if (!strcmp(entryType, "alias"))
89 (void) poptAddItem(con, item, 0);
90 else if (!strcmp(entryType, "exec"))
91 (void) poptAddItem(con, item, 1);
92 /*@=nullstate@*/
93 }
94 /*@=compmempass@*/
95
poptReadConfigFile(poptContext con,const char * fn)96 int poptReadConfigFile(poptContext con, const char * fn)
97 {
98 const char * file, * chptr, * end;
99 char * buf;
100 /*@dependent@*/ char * dst;
101 int fd, rc;
102 off_t fileLength;
103
104 fd = open(fn, O_RDONLY);
105 if (fd < 0)
106 return (errno == ENOENT ? 0 : POPT_ERROR_ERRNO);
107
108 fileLength = lseek(fd, 0, SEEK_END);
109 if (fileLength == -1 || lseek(fd, 0, 0) == -1) {
110 rc = errno;
111 (void) close(fd);
112 errno = rc;
113 return POPT_ERROR_ERRNO;
114 }
115
116 file = alloca(fileLength + 1);
117 if (read(fd, (char *)file, fileLength) != fileLength) {
118 rc = errno;
119 (void) close(fd);
120 errno = rc;
121 return POPT_ERROR_ERRNO;
122 }
123 if (close(fd) == -1)
124 return POPT_ERROR_ERRNO;
125
126 /*@-boundswrite@*/
127 dst = buf = alloca(fileLength + 1);
128
129 chptr = file;
130 end = (file + fileLength);
131 /*@-infloops@*/ /* LCL: can't detect chptr++ */
132 while (chptr < end) {
133 switch (*chptr) {
134 case '\n':
135 *dst = '\0';
136 dst = buf;
137 while (*dst && isspace(*dst)) dst++;
138 if (*dst && *dst != '#')
139 configLine(con, dst);
140 chptr++;
141 /*@switchbreak@*/ break;
142 case '\\':
143 *dst++ = *chptr++;
144 if (chptr < end) {
145 if (*chptr == '\n')
146 dst--, chptr++;
147 /* \ at the end of a line does not insert a \n */
148 else
149 *dst++ = *chptr++;
150 }
151 /*@switchbreak@*/ break;
152 default:
153 *dst++ = *chptr++;
154 /*@switchbreak@*/ break;
155 }
156 }
157 /*@=infloops@*/
158 /*@=boundswrite@*/
159
160 return 0;
161 }
162
poptReadDefaultConfig(poptContext con,int useEnv)163 int poptReadDefaultConfig(poptContext con, /*@unused@*/ int useEnv)
164 {
165 char * fn, * home;
166 int rc;
167
168 if (con->appName == NULL) return 0;
169
170 rc = poptReadConfigFile(con, "/etc/popt");
171 if (rc) return rc;
172
173 if ((home = getenv("HOME"))) {
174 fn = alloca(strlen(home) + 20);
175 strcpy(fn, home);
176 strcat(fn, "/.popt");
177 rc = poptReadConfigFile(con, fn);
178 if (rc) return rc;
179 }
180
181 return 0;
182 }
183