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Fix #17: Fix off-by-one problem with strdup() replacement

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Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson 2018-06-14 21:59:18 +02:00
parent a5aaf51530
commit 76039b458b
1 changed files with 10 additions and 6 deletions
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16
src/sysunix.c
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@ -218,14 +218,18 @@ void rl_ttyset(int Reset)
#ifndef HAVE_STRDUP #ifndef HAVE_STRDUP
/* Return an allocated copy of a string. */ /* Return an allocated copy of a string. */
char *strdup(const char *p) char *strdup(const char *s)
{ {
char *new = malloc(sizeof(char) * strlen(p)); size_t len;
char *ptr;
if (new) { if (!s)
strcpy(new, p); return NULL;
return new;
} len = strlen(s) + 1;
ptr = malloc(len);
if (ptr)
return memcpy(ptr, s, len);
return NULL; return NULL;
} }