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6fb737be5e
A useful shell safety helper sq_expand() was hidden as a static function in diff.c. Extract it out and make it available as sq_quote(). Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
41 lines
825 B
C
41 lines
825 B
C
#include "cache.h"
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#include "quote.h"
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/* Help to copy the thing properly quoted for the shell safety.
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* any single quote is replaced with '\'', and the caller is
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* expected to enclose the result within a single quote pair.
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*
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* E.g.
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* original sq_quote result
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* name ==> name ==> 'name'
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* a b ==> a b ==> 'a b'
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* a'b ==> a'\''b ==> 'a'\''b'
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*/
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char *sq_quote(const char *src)
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{
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static char *buf = NULL;
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int cnt, c;
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const char *cp;
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char *bp;
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/* count bytes needed to store the quoted string. */
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for (cnt = 3, cp = src; *cp; cnt++, cp++)
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if (*cp == '\'')
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cnt += 3;
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buf = xmalloc(cnt);
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bp = buf;
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*bp++ = '\'';
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while ((c = *src++)) {
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if (c != '\'')
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*bp++ = c;
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else {
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bp = strcpy(bp, "'\\''");
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bp += 4;
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}
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}
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*bp++ = '\'';
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*bp = 0;
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return buf;
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}
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