diff options
Diffstat (limited to 'printbuf.c')
| -rw-r--r-- | printbuf.c | 14 |
1 files changed, 13 insertions, 1 deletions
@@ -15,6 +15,7 @@ #include "config.h" +#include <errno.h> #include <limits.h> #include <stdio.h> #include <stdlib.h> @@ -56,6 +57,8 @@ struct printbuf *printbuf_new(void) * * If the current size is large enough, nothing is changed. * + * If extension failed, errno is set to indicate the error. + * * Note: this does not check the available space! The caller * is responsible for performing those calculations. */ @@ -68,7 +71,10 @@ static int printbuf_extend(struct printbuf *p, int min_size) return 0; /* Prevent signed integer overflows with large buffers. */ if (min_size > INT_MAX - 8) + { + errno = EFBIG; return -1; + } if (p->size > INT_MAX / 2) new_size = min_size + 8; else { @@ -77,7 +83,7 @@ static int printbuf_extend(struct printbuf *p, int min_size) new_size = min_size + 8; } #ifdef PRINTBUF_DEBUG - MC_DEBUG("printbuf_memappend: realloc " + MC_DEBUG("printbuf_extend: realloc " "bpos=%d min_size=%d old_size=%d new_size=%d\n", p->bpos, min_size, p->size, new_size); #endif /* PRINTBUF_DEBUG */ @@ -92,7 +98,10 @@ int printbuf_memappend(struct printbuf *p, const char *buf, int size) { /* Prevent signed integer overflows with large buffers. */ if (size < 0 || size > INT_MAX - p->bpos - 1) + { + errno = EFBIG; return -1; + } if (p->size <= p->bpos + size + 1) { if (printbuf_extend(p, p->bpos + size + 1) < 0) @@ -112,7 +121,10 @@ int printbuf_memset(struct printbuf *pb, int offset, int charvalue, int len) offset = pb->bpos; /* Prevent signed integer overflows with large buffers. */ if (len < 0 || offset < -1 || len > INT_MAX - offset) + { + errno = EFBIG; return -1; + } size_needed = offset + len; if (pb->size < size_needed) { |