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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1997-2005
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* Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
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* This code is derived from software contributed to Berkeley by
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* equal(s1, s2) Return true if strings are equal.
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* scopy(from, to) Copy a string.
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* scopyn(from, to, n) Like scopy, but checks for overflow.
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* number(s) Convert a string of digits to an integer.
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* is_number(s) Return true if s is a string of digits.
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char nullstr[1]; /* zero length string */
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const char spcstr[] = " ";
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const char snlfmt[] = "%s\n";
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const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
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const char illnum[] = "Illegal number: %s";
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const char homestr[] = "HOME";
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* equal - #defined in mystring.h
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* scopy - #defined in mystring.h
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* scopyn - copy a string from "from" to "to", truncating the string
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* if necessary. "To" is always nul terminated, even if
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* truncation is performed. "Size" is the size of "to".
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scopyn(const char *from, char *to, int size)
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if ((*to++ = *from++) == '\0')
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* prefix -- see if pfx is a prefix of string.
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prefix(const char *string, const char *pfx)
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if (*pfx++ != *string++)
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return (char *) string;
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* Convert a string of digits to an integer, printing an error message on
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number(const char *s)
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* Check for a valid number. This should be elsewhere.
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is_number(const char *p)
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} while (*++p != '\0');
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* Produce a possibly single quoted string suitable as input to the shell.
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* The return string is allocated on the stack.
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single_quote(const char *s) {
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len = strchrnul(s, '\'') - s;
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q = p = makestrspace(len + 3, p);
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q = mempcpy(q, s, len);
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len = strspn(s, "'");
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q = p = makestrspace(len + 3, p);
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q = mempcpy(q, s, len);
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* Like strdup but works with the ash stack.
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sstrdup(const char *p)
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size_t len = strlen(p) + 1;
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return memcpy(stalloc(len), p, len);
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* Wrapper around strcmp for qsort/bsearch/...
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pstrcmp(const void *a, const void *b)
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return strcmp(*(const char *const *) a, *(const char *const *) b);
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* Find a string is in a sorted array.
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findstring(const char *s, const char *const *array, size_t nmemb)
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return bsearch(&s, array, nmemb, sizeof(const char *), pstrcmp);
added
removed
dash/mystring.c
