2 * Various trivial helper wrappers around standard functions
6 char *xstrdup(const char *str)
8 char *ret = strdup(str);
10 release_pack_memory(strlen(str) + 1, -1);
13 die("Out of memory, strdup failed");
18 void *xmalloc(size_t size)
20 void *ret = malloc(size);
24 release_pack_memory(size, -1);
29 die("Out of memory, malloc failed");
32 memset(ret, 0xA5, size);
38 * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
39 * "data" to the allocated memory, zero terminates the allocated memory,
40 * and returns a pointer to the allocated memory. If the allocation fails,
43 void *xmemdupz(const void *data, size_t len)
45 char *p = xmalloc(len + 1);
51 char *xstrndup(const char *str, size_t len)
53 char *p = memchr(str, '\0', len);
54 return xmemdupz(str, p ? p - str : len);
57 void *xrealloc(void *ptr, size_t size)
59 void *ret = realloc(ptr, size);
61 ret = realloc(ptr, 1);
63 release_pack_memory(size, -1);
64 ret = realloc(ptr, size);
66 ret = realloc(ptr, 1);
68 die("Out of memory, realloc failed");
73 void *xcalloc(size_t nmemb, size_t size)
75 void *ret = calloc(nmemb, size);
76 if (!ret && (!nmemb || !size))
79 release_pack_memory(nmemb * size, -1);
80 ret = calloc(nmemb, size);
81 if (!ret && (!nmemb || !size))
84 die("Out of memory, calloc failed");
89 void *xmmap(void *start, size_t length,
90 int prot, int flags, int fd, off_t offset)
92 void *ret = mmap(start, length, prot, flags, fd, offset);
93 if (ret == MAP_FAILED) {
96 release_pack_memory(length, fd);
97 ret = mmap(start, length, prot, flags, fd, offset);
98 if (ret == MAP_FAILED)
99 die("Out of memory? mmap failed: %s", strerror(errno));
105 * xread() is the same a read(), but it automatically restarts read()
106 * operations with a recoverable error (EAGAIN and EINTR). xread()
107 * DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
109 ssize_t xread(int fd, void *buf, size_t len)
113 nr = read(fd, buf, len);
114 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
121 * xwrite() is the same a write(), but it automatically restarts write()
122 * operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
123 * GUARANTEE that "len" bytes is written even if the operation is successful.
125 ssize_t xwrite(int fd, const void *buf, size_t len)
129 nr = write(fd, buf, len);
130 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
136 ssize_t read_in_full(int fd, void *buf, size_t count)
142 ssize_t loaded = xread(fd, p, count);
144 return total ? total : loaded;
153 ssize_t write_in_full(int fd, const void *buf, size_t count)
159 ssize_t written = xwrite(fd, p, count);
178 die("dup failed: %s", strerror(errno));
182 FILE *xfdopen(int fd, const char *mode)
184 FILE *stream = fdopen(fd, mode);
186 die("Out of memory? fdopen failed: %s", strerror(errno));
190 int xmkstemp(char *template)
194 fd = mkstemp(template);
196 die("Unable to create temporary file: %s", strerror(errno));