2 Copyright (c) 1990-2005 Info-ZIP. All rights reserved.
4 See the accompanying file LICENSE, version 2000-Apr-09 or later
5 (the contents of which are also included in unzip.h) for terms of use.
6 If, for some reason, all these files are missing, the Info-ZIP license
7 also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
9 /*----------------------------------------------------------------*
10 | envargs - add default options from environment to command line
11 |----------------------------------------------------------------
12 | Author: Bill Davidsen, original 10/13/91, revised 23 Oct 1991.
13 | This program is in the public domain.
14 |----------------------------------------------------------------
15 | Minor program notes:
16 | 1. Yes, the indirection is a tad complex
17 | 2. Parentheses were added where not needed in some cases
18 | to make the action of the code less obscure.
19 |----------------------------------------------------------------
20 | UnZip notes: 24 May 92 ("v1.4"):
21 | 1. #include "unzip.h" for prototypes (24 May 92)
22 | 2. changed ch to type char (24 May 92)
23 | 3. added an ifdef to avoid Borland warnings (24 May 92)
24 | 4. included Rich Wales' mksargs() routine (for MS-DOS, maybe
25 | OS/2? NT?) (4 Dec 93)
26 | 5. added alternate-variable string envstr2 (21 Apr 94)
27 | 6. added support for quoted arguments (6 Jul 96)
28 *----------------------------------------------------------------*/
31 #define __ENVARGS_C /* identifies this source module */
32 #define UNZIP_INTERNAL
35 #ifdef __EMX__ /* emx isspace() returns TRUE on extended ASCII !! */
36 # define ISspace(c) ((c) & 0x80 ? 0 : isspace((unsigned)c))
38 # define ISspace(c) isspace((unsigned)c)
41 #if (!defined(RISCOS) && (!defined(MODERN) || defined(NO_STDLIB_H)))
42 extern char *getenv();
44 static int count_args OF((ZCONST char *));
47 /* envargs() returns PK-style error code */
49 int envargs(Pargc, Pargv, envstr, envstr2)
52 ZCONST char *envstr, *envstr2;
54 char *envptr; /* value returned by getenv */
55 char *bufptr; /* copy of env info */
56 int argc = 0; /* internal arg count */
57 register int ch; /* spare temp value */
58 char **argv; /* internal arg vector */
59 char **argvect; /* copy of vector address */
61 /* see if anything in the environment */
62 if ((envptr = getenv(envstr)) != (char *)NULL) /* usual var */
63 while (ISspace(*envptr)) /* must discard leading spaces */
65 if (envptr == (char *)NULL || *envptr == '\0')
66 if ((envptr = getenv(envstr2)) != (char *)NULL) /* alternate var */
67 while (ISspace(*envptr))
69 if (envptr == (char *)NULL || *envptr == '\0')
72 bufptr = malloc(1 + strlen(envptr));
73 if (bufptr == (char *)NULL)
75 #if ((defined(WIN32) || defined(WINDLL)) && !defined(_WIN32_WCE))
78 /* SPC: don't know codepage of 'real' WinNT console */
79 strcpy(bufptr, envptr);
81 /* Win95 environment is DOS and uses OEM character coding */
82 OEM_TO_INTERN(envptr, bufptr);
85 /* DOS (Win 3.x) environment uses OEM codepage */
86 OEM_TO_INTERN(envptr, bufptr);
88 #else /* !((WIN32 || WINDLL) && !_WIN32_WCE) */
89 strcpy(bufptr, envptr);
90 #endif /* ?((WIN32 || WINDLL) && !_WIN32_WCE) */
92 /* count the args so we can allocate room for them */
93 argc = count_args(bufptr);
94 /* allocate a vector large enough for all args */
95 argv = (char **)malloc((argc + *Pargc + 1) * sizeof(char *));
96 if (argv == (char **)NULL) {
102 /* copy the program name first, that's always true */
103 *(argv++) = *((*Pargv)++);
105 /* copy the environment args next, may be changed */
107 #if defined(AMIGA) || defined(UNIX)
108 if (*bufptr == '"') {
109 char *argstart = ++bufptr;
111 *(argv++) = argstart;
112 for (ch = *bufptr; ch != '\0' && ch != '\"';
113 ch = *PREINCSTR(bufptr))
114 if (ch == '\\' && bufptr[1] != '\0')
115 ++bufptr; /* advance to char after backslash */
117 *(bufptr++) = '\0'; /* overwrite trailing " */
119 /* remove escape characters */
120 while ((argstart = MBSCHR(argstart, '\\')) != (char *)NULL) {
121 strcpy(argstart, argstart + 1);
127 while ((ch = *bufptr) != '\0' && !ISspace(ch))
133 #ifdef DOS_FLX_NLM_OS2_W32
134 /* we do not support backslash-quoting of quotes in quoted
135 * strings under DOS_FLX_NLM_OS2_W32, because backslashes are
136 * directory separators and double quotes are illegal in filenames */
137 if (*bufptr == '"') {
138 *(argv++) = ++bufptr;
139 while ((ch = *bufptr) != '\0' && ch != '\"')
145 while ((ch = *bufptr) != '\0' && !ISspace(ch))
152 while ((ch = *bufptr) != '\0' && !ISspace(ch))
156 #endif /* ?DOS_FLX_NLM_OS2_W32 */
157 #endif /* ?(AMIGA || UNIX) */
158 while ((ch = *bufptr) != '\0' && ISspace(ch))
162 /* now save old argc and copy in the old args */
165 *(argv++) = *((*Pargv)++);
167 /* finally, add a NULL after the last arg, like Unix */
168 *argv = (char *)NULL;
170 /* save the values and return, indicating succes */
179 static int count_args(s)
186 /* count and skip args */
188 #if defined(AMIGA) || defined(UNIX)
190 for (ch = *PREINCSTR(s); ch != '\0' && ch != '\"';
192 if (ch == '\\' && s[1] != '\0')
195 ++s; /* trailing quote */
198 #ifdef DOS_FLX_NLM_OS2_W32
200 ++s; /* leading quote */
201 while ((ch = *s) != '\0' && ch != '\"')
204 ++s; /* trailing quote */
206 #endif /* DOS_FLX_NLM_OS2_W32 */
207 #endif /* ?(AMIGA || UNIX) */
208 while ((ch = *s) != '\0' && !ISspace(ch)) /* note else-clauses above */
210 while ((ch = *s) != '\0' && ISspace(ch))
227 printf("Orig argv: %p\n", argv);
228 dump_args(argc, argv);
229 if ((err = envargs(&argc, &argv, "ENVTEST")) != PK_OK) {
230 perror("envargs: cannot get memory for arguments");
233 printf(" New argv: %p\n", argv);
234 dump_args(argc, argv);
239 void dump_args(argc, argv)
245 printf("\nDump %d args:\n", argc);
246 for (i = 0; i < argc; ++i)
247 printf("%3d %s\n", i, argv[i]);
254 #ifdef MSDOS /* DOS_OS2? DOS_OS2_W32? */
257 * void mksargs(int *argcp, char ***argvp)
259 * Substitutes the extended command line argument list produced by
260 * the MKS Korn Shell in place of the command line info from DOS.
262 * The MKS shell gets around DOS's 128-byte limit on the length of
263 * a command line by passing the "real" command line in the envi-
264 * ronment. The "real" arguments are flagged by prepending a tilde
267 * This "mksargs" routine creates a new argument list by scanning
268 * the environment from the beginning, looking for strings begin-
269 * ning with a tilde character. The new list replaces the original
270 * "argv" (pointed to by "argvp"), and the number of arguments
271 * in the new list replaces the original "argc" (pointed to by
276 void mksargs(argcp, argvp)
280 #ifndef MSC /* declared differently in MSC 7.0 headers, at least */
282 extern char **environ; /* environment */
285 char **envp; /* pointer into environment */
286 char **newargv; /* new argument list */
287 char **argp; /* pointer into new arg list */
288 int newargc; /* new argument count */
291 if (environ == NULL || argcp == NULL || argvp == NULL || *argvp == NULL)
294 /* find out how many environment arguments there are */
295 for (envp = environ, newargc = 0;
296 *envp != NULL && (*envp)[0] == '~';
300 return; /* no environment arguments */
302 /* set up new argument list */
303 newargv = (char **) malloc(sizeof(char **) * (newargc+1));
305 return; /* malloc failed */
307 for (argp = newargv, envp = environ; *envp != NULL && (*envp)[0] == '~';
308 *argp++ = &(*envp++)[1])
310 *argp = NULL; /* null-terminate the list */
312 /* substitute new argument list in place of old one */