2 Copyright (c) 2004 The Regents of the University of Michigan.
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6 modification, are permitted provided that the following conditions
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10 notice, this list of conditions and the following disclaimer.
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18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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20 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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32 * support/nfs/cacheio.c
33 * support IO on the cache channel files in 2.5 and beyond.
34 * These use 'qwords' which are like words, but with a little quoting.
40 * Support routines for text-based upcalls.
41 * Fields are separated by spaces.
42 * Fields are either mangled to quote space tab newline slosh with slosh
43 * or a hexified with a leading \x
44 * Record is terminated with newline.
52 #include <sys/types.h>
60 void qword_add(char **bpp, int *lp, char *str)
68 while ((c=*str++) && len)
76 *bp++ = '0' + ((c & 0300)>>6);
77 *bp++ = '0' + ((c & 0070)>>3);
78 *bp++ = '0' + ((c & 0007)>>0);
86 if (c || len <1) len = -1;
95 void qword_addhex(char **bpp, int *lp, char *buf, int blen)
106 while (blen && len >= 2) {
107 unsigned char c = *buf++;
108 *bp++ = '0' + ((c&0xf0)>>4) + (c>=0xa0)*('a'-'9'-1);
109 *bp++ = '0' + (c&0x0f) + ((c&0x0f)>=0x0a)*('a'-'9'-1);
114 if (blen || len<1) len = -1;
123 void qword_addint(char **bpp, int *lp, int n)
127 len = snprintf(*bpp, *lp, "%d ", n);
134 void qword_addeol(char **bpp, int *lp)
143 static char qword_buf[8192];
144 static char tmp_buf[8192];
145 void qword_print(FILE *f, char *str)
147 char *bp = qword_buf;
148 int len = sizeof(qword_buf);
149 qword_add(&bp, &len, str);
150 fwrite(qword_buf, bp-qword_buf, 1, f);
152 memcpy(tmp_buf, qword_buf, bp-qword_buf);
153 tmp_buf[bp-qword_buf] = '\0';
154 printerr(2, "%s", tmp_buf);
157 void qword_printhex(FILE *f, char *str, int slen)
159 char *bp = qword_buf;
160 int len = sizeof(qword_buf);
161 qword_addhex(&bp, &len, str, slen);
162 fwrite(qword_buf, bp-qword_buf, 1, f);
164 memcpy(tmp_buf, qword_buf, bp-qword_buf);
165 tmp_buf[bp-qword_buf] = '\0';
166 printerr(2, "%s", tmp_buf);
169 void qword_printint(FILE *f, int num)
171 fprintf(f, "%d ", num);
172 printerr(2, "%d ", num);
175 void qword_eol(FILE *f)
184 #define isodigit(c) (isdigit(c) && c <= '7')
185 int qword_get(char **bpp, char *dest, int bufsize)
187 /* return bytes copied, or -1 on error */
191 while (*bp == ' ') bp++;
193 if (bp[0] == '\\' && bp[1] == 'x') {
196 while (isxdigit(bp[0]) && isxdigit(bp[1]) && len < bufsize) {
197 int byte = isdigit(*bp) ? *bp-'0' : toupper(*bp)-'A'+10;
200 byte |= isdigit(*bp) ? *bp-'0' : toupper(*bp)-'A'+10;
206 /* text with \nnn octal quoting */
207 while (*bp != ' ' && *bp != '\n' && *bp && len < bufsize-1) {
209 isodigit(bp[1]) && (bp[1] <= '3') &&
212 int byte = (*++bp -'0');
214 byte = (byte << 3) | (*bp++ - '0');
215 byte = (byte << 3) | (*bp++ - '0');
225 if (*bp != ' ' && *bp != '\n' && *bp != '\0')
227 while (*bp == ' ') bp++;
233 int qword_get_int(char **bpp, int *anint)
238 int len = qword_get(bpp, buf, 50);
239 if (len < 0) return -1;
240 if (len ==0) return -1;
241 rv = strtol(buf, &ep, 0);
247 int readline(int fd, char **buf, int *lenp)
249 /* read a line into *buf, which is malloced *len long
250 * realloc if needed until we find a \n
251 * nul out the \n and return
252 * 0 of eof, 1 of success
257 char *b = malloc(128);
263 len = read(fd, *buf, *lenp);
265 printerr(2, "read error in readline: %d\n", len);
268 while ((*buf)[len-1] != '\n') {
269 /* now the less common case. There was no newline,
270 * so we have to keep reading after re-alloc
275 new = realloc(*buf, *lenp);
279 nl = read(fd, *buf +len, *lenp - len);
281 printerr(2, "read error in readline: %d\n", nl);
287 printerr(1, "read line with %d characters:\n%s\n", *lenp, *buf);