diff options
Diffstat (limited to 'wrapper.c')
| -rw-r--r-- | wrapper.c | 32 |
1 files changed, 32 insertions, 0 deletions
@@ -152,6 +152,9 @@ void *xcalloc(size_t nmemb, size_t size) { void *ret; + if (unsigned_mult_overflows(nmemb, size)) + die("data too large to fit into virtual memory space"); + memory_limit_check(size * nmemb, 0); ret = calloc(nmemb, size); if (!ret && (!nmemb || !size)) @@ -375,6 +378,19 @@ FILE *xfdopen(int fd, const char *mode) return stream; } +FILE *fopen_for_writing(const char *path) +{ + FILE *ret = fopen(path, "w"); + + if (!ret && errno == EPERM) { + if (!unlink(path)) + ret = fopen(path, "w"); + else + errno = EPERM; + } + return ret; +} + int xmkstemp(char *template) { int fd; @@ -609,6 +625,22 @@ char *xgetcwd(void) return strbuf_detach(&sb, NULL); } +int xsnprintf(char *dst, size_t max, const char *fmt, ...) +{ + va_list ap; + int len; + + va_start(ap, fmt); + len = vsnprintf(dst, max, fmt, ap); + va_end(ap); + + if (len < 0) + die("BUG: your snprintf is broken"); + if (len >= max) + die("BUG: attempt to snprintf into too-small buffer"); + return len; +} + static int write_file_v(const char *path, int fatal, const char *fmt, va_list params) { |