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-rw-r--r--compat/err.c84
-rw-r--r--compat/getprogname.c21
-rw-r--r--compat/strlcat.c54
-rw-r--r--compat/strlcpy.c49
-rw-r--r--compat/vasprintf.c46
5 files changed, 254 insertions, 0 deletions
diff --git a/compat/err.c b/compat/err.c
new file mode 100644
index 0000000..840acd0
--- /dev/null
+++ b/compat/err.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+/* cheat: if we don't have getprogname in stdlib, will link against
+ * compat/getprogname.c anyway. */
+const char *getprogname(void);
+
+static void vwarn_impl(const char*, va_list);
+static void vwarnx_impl(const char*, va_list);
+
+static void
+vwarn_impl(const char *fmt, va_list ap)
+{
+ fprintf(stderr, "%s: ", getprogname());
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, ": %s\n", strerror(errno));
+}
+
+static void
+vwarnx_impl(const char *fmt, va_list ap)
+{
+ fprintf(stderr, "%s: ", getprogname());
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
+}
+
+void
+err(int ret, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vwarn_impl(fmt, va);
+ va_end(ap, fmt);
+ exit(ret);
+}
+
+void
+errx(int ret, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vwarnx_impl(fmt, va);
+ va_end(ap, fmt);
+ exit(ret);
+}
+
+void
+warn(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vwarn_impl(fmt, va);
+ va_end(ap, fmt);
+}
+
+void
+warnx(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vwarnx_impl(fmt, va);
+ va_end(ap, fmt);
+}
diff --git a/compat/getprogname.c b/compat/getprogname.c
new file mode 100644
index 0000000..f162268
--- /dev/null
+++ b/compat/getprogname.c
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+const char *
+getprogname(void)
+{
+ return "gmid";
+}
diff --git a/compat/strlcat.c b/compat/strlcat.c
new file mode 100644
index 0000000..2aa3f74
--- /dev/null
+++ b/compat/strlcat.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include "config.h"
+
+#include <sys/types.h>
+#include <string.h>
+
+/*
+ * Appends src to string dst of size dsize (unlike strncat, dsize is the
+ * full size of dst, not space left). At most dsize-1 characters
+ * will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
+ * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
+ * If retval >= dsize, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t dsize)
+{
+ const char *odst = dst;
+ const char *osrc = src;
+ size_t n = dsize;
+ size_t dlen;
+
+ /* Find the end of dst and adjust bytes left but don't go past end. */
+ while (n-- != 0 && *dst != '\0')
+ dst++;
+ dlen = dst - odst;
+ n = dsize - dlen;
+
+ if (n-- == 0)
+ return(dlen + strlen(src));
+ while (*src != '\0') {
+ if (n != 0) {
+ *dst++ = *src;
+ n--;
+ }
+ src++;
+ }
+ *dst = '\0';
+
+ return(dlen + (src - osrc)); /* count does not include NUL */
+}
diff --git a/compat/strlcpy.c b/compat/strlcpy.c
new file mode 100644
index 0000000..7edee76
--- /dev/null
+++ b/compat/strlcpy.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include "config.h"
+
+#include <sys/types.h>
+#include <string.h>
+
+/*
+ * Copy string src to buffer dst of size dsize. At most dsize-1
+ * chars will be copied. Always NUL terminates (unless dsize == 0).
+ * Returns strlen(src); if retval >= dsize, truncation occurred.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t dsize)
+{
+ const char *osrc = src;
+ size_t nleft = dsize;
+
+ /* Copy as many bytes as will fit. */
+ if (nleft != 0) {
+ while (--nleft != 0) {
+ if ((*dst++ = *src++) == '\0')
+ break;
+ }
+ }
+
+ /* Not enough room in dst, add NUL and traverse rest of src. */
+ if (nleft == 0) {
+ if (dsize != 0)
+ *dst = '\0'; /* NUL-terminate dst */
+ while (*src++)
+ ;
+ }
+
+ return(src - osrc - 1); /* count does not include NUL */
+}
diff --git a/compat/vasprintf.c b/compat/vasprintf.c
new file mode 100644
index 0000000..d76f3ef
--- /dev/null
+++ b/compat/vasprintf.c
@@ -0,0 +1,46 @@
+/* from mandoc, with tweaks */
+/*
+ * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * This fallback implementation is not efficient:
+ * It does the formatting twice.
+ * Short of fiddling with the unknown internals of the system's
+ * printf(3) or completely reimplementing printf(3), i can't think
+ * of another portable solution.
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+vasprintf(char **ret, const char *format, va_list ap)
+{
+ char buf[2];
+ va_list ap2;
+ int sz;
+
+ va_copy(ap2, ap);
+ sz = vsnprintf(buf, sizeof(buf), format, ap2);
+ va_end(ap2);
+
+ if (sz != -1 && (*ret = malloc(sz + 1)) != NULL) {
+ if (vsnprintf(*ret, sz + 1, format, ap) == sz)
+ return sz;
+ free(*ret);
+ }
+ *ret = NULL;
+ return -1;
+}
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