1 /* $Header: util.c,v 2.0 88/06/05 00:16:07 root Exp $
4 * Revision 2.0 88/06/05 00:16:07 root
5 * Baseline version 2.0.
18 #define MEM_SIZE unsigned int
20 static char nomem[] = "Out of memory!\n";
22 /* paranoid version of malloc */
33 ptr = malloc(size?size:1); /* malloc(0) is NASTY on our system */
36 fprintf(stderr,"0x%x: (%05d) malloc %d bytes\n",ptr,an++,size);
41 fputs(nomem,stdout) FLUSH;
47 /* paranoid version of realloc */
50 saferealloc(where,size)
57 ptr = realloc(where,size?size:1); /* realloc(0) is NASTY on our system */
60 fprintf(stderr,"0x%x: (%05d) rfree\n",where,an++);
61 fprintf(stderr,"0x%x: (%05d) realloc %d bytes\n",ptr,an++,size);
67 fputs(nomem,stdout) FLUSH;
73 /* safe version of free */
80 fprintf(stderr,"0x%x: (%05d) free\n",where,an++);
85 /* safe version of string copy */
93 register char *dest = to;
96 for (len--; len && (*dest++ = *from++); len--) ;
102 /* safe version of string concatenate, with \n deletion and space padding */
110 register char *dest = to;
112 len--; /* leave room for null */
114 while (len && *dest++) len--;
121 while (len && (*dest++ = *from++)) len--;
124 if (*(dest-1) == '\n')
131 /* copy a string up to some (non-backslashed) delimiter, if any */
134 cpytill(to,from,delim)
135 register char *to, *from;
138 for (; *from; from++,to++) {
140 if (from[1] == delim)
142 else if (from[1] == '\\')
145 else if (*from == delim)
156 register char *to, *from;
159 for (; *from; from++,to++) {
162 else if (*from == '$')
164 else if (*from == delim)
172 /* return ptr to little string in big string, NULL if not found */
179 register char *t, *s, *x;
181 for (t = big; *t; t++) {
182 for (x=t,s=little; *s; x++,s++) {
194 /* copy a string to a safe spot */
200 register char *newaddr = safemalloc((MEM_SIZE)(strlen(str)+1));
202 (void)strcpy(newaddr,str);
206 /* grow a static string to at least a certain length */
209 growstr(strptr,curlen,newlen)
214 if (newlen > *curlen) { /* need more room? */
216 *strptr = saferealloc(*strptr,(MEM_SIZE)newlen);
218 *strptr = safemalloc((MEM_SIZE)newlen);
224 fatal(pat,a1,a2,a3,a4)
227 fprintf(stderr,pat,a1,a2,a3,a4);
231 static bool firstsetenv = TRUE;
232 extern char **environ;
238 register int i=envix(nam); /* where does it go? */
240 if (!environ[i]) { /* does not exist yet */
241 if (firstsetenv) { /* need we copy environment? */
244 char **tmpenv = (char**) /* point our wand at memory */
245 safemalloc((i+2) * sizeof(char*));
247 char **tmpenv = Null(char **);
251 for (j=0; j<i; j++) /* copy environment */
252 tmpenv[j] = environ[j];
253 environ = tmpenv; /* tell exec where it is now */
257 environ = (char**) saferealloc((char*) environ,
258 (i+2) * sizeof(char*));
259 /* just expand it a bit */
261 environ[i+1] = Nullch; /* make sure it's null terminated */
263 environ[i] = safemalloc(strlen(nam) + strlen(val) + 2);
264 /* this may or may not be in */
265 /* the old environ structure */
266 sprintf(environ[i],"%s=%s",nam,val);/* all that work just for this */
273 register int i, len = strlen(nam);
275 for (i = 0; environ[i]; i++) {
276 if (strnEQ(environ[i],nam,len) && environ[i][len] == '=')
277 break; /* strnEQ must come first to avoid */
278 } /* potential SEGV's */