Adding upstream version 1.9.5p2.upstream/1.9.5p2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 174 insertions, 0 deletions

diff --git a/lib/util/str2sig.c b/lib/util/str2sig.c
new file mode 100644
index 0000000..e265ec4
--- /dev/null
+++ b/lib/util/str2sig.c
@@ -0,0 +1,174 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2019-2020 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * 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 is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#ifndef HAVE_STR2SIG
+
+#include <errno.h>
+#include <string.h>
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <ctype.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include "sudo_compat.h"
+#include "sudo_util.h"
+
+#if !defined(HAVE_SIGABBREV_NP)
+# if defined(HAVE_DECL_SYS_SIGNAME) && HAVE_DECL_SYS_SIGNAME == 1
+#   define sigabbrev_np(_x)	sys_signame[(_x)]
+# elif defined(HAVE_DECL__SYS_SIGNAME) && HAVE_DECL__SYS_SIGNAME == 1
+#   define sigabbrev_np(_x)	_sys_signame[(_x)]
+# elif defined(HAVE_SYS_SIGABBREV)
+#   define sigabbrev_np(_x)	sys_sigabbrev[(_x)]
+#  if defined(HAVE_DECL_SYS_SIGABBREV) && HAVE_DECL_SYS_SIGABBREV == 0
+    /* sys_sigabbrev is not declared by glibc */
+    extern const char *const sys_sigabbrev[NSIG];
+#  endif
+# else
+#   define sigabbrev_np(_x)	sudo_sys_signame[(_x)]
+    extern const char *const sudo_sys_signame[NSIG];
+# endif
+#endif /* !HAVE_SIGABBREV_NP */
+
+/*
+ * Many systems use aliases for source backward compatibility.
+ */
+static struct sigalias {
+    const char *name;
+    int number;
+} sigaliases[] = {
+#ifdef SIGABRT
+    { "ABRT", SIGABRT },
+#endif
+#ifdef SIGCLD
+    { "CLD",  SIGCLD },
+#endif
+#ifdef SIGIO
+    { "IO",   SIGIO },
+#endif
+#ifdef SIGIOT
+    { "IOT",  SIGIOT },
+#endif
+#ifdef SIGLOST
+    { "LOST", SIGLOST },
+#endif
+#ifdef SIGPOLL
+    { "POLL", SIGPOLL },
+#endif
+    { NULL, -1 }
+};
+
+/*
+ * Translate signal name to number.
+ */
+int
+sudo_str2sig(const char *signame, int *result)
+{
+    struct sigalias *alias;
+    const char *errstr;
+    int signo;
+
+    /* Could be a signal number encoded as a string. */
+    if (isdigit((unsigned char)signame[0])) {
+	signo = sudo_strtonum(signame, 0, NSIG - 1, &errstr);
+	if (errstr != NULL)
+	    return -1;
+	*result = signo;
+	return 0;
+    }
+
+    /* Check real-time signals. */
+#if defined(SIGRTMIN)
+    if (strncmp(signame, "RTMIN", 5) == 0) {
+	if (signame[5] == '\0') {
+	    *result = SIGRTMIN;
+	    return 0;
+	}
+	if (signame[5] == '+') {
+	    if (isdigit((unsigned char)signame[6])) {
+# ifdef _SC_RTSIG_MAX
+		const long rtmax = sysconf(_SC_RTSIG_MAX);
+# else
+		const long rtmax = SIGRTMAX - SIGRTMIN;
+# endif
+		const int off = signame[6] - '0';
+
+		if (rtmax > 0 && off < rtmax / 2) {
+		    *result = SIGRTMIN + off;
+		    return 0;
+		}
+	    }
+	}
+    }
+#endif
+#if defined(SIGRTMAX)
+    if (strncmp(signame, "RTMAX", 5) == 0) {
+	if (signame[5] == '\0') {
+	    *result = SIGRTMAX;
+	    return 0;
+	}
+	if (signame[5] == '-') {
+	    if (isdigit((unsigned char)signame[6])) {
+# ifdef _SC_RTSIG_MAX
+		const long rtmax = sysconf(_SC_RTSIG_MAX);
+# else
+		const long rtmax = SIGRTMAX - SIGRTMIN;
+# endif
+		const int off = signame[6] - '0';
+
+		if (rtmax > 0 && off < rtmax / 2) {
+		    *result = SIGRTMAX - off;
+		    return 0;
+		}
+	    }
+	}
+    }
+#endif
+
+    /* Check aliases. */
+    for (alias = sigaliases; alias->name != NULL; alias++) {
+	if (strcmp(signame, alias->name) == 0) {
+	    *result = alias->number;
+	    return 0;
+	}
+    }
+
+    for (signo = 1; signo < NSIG; signo++) {
+	const char *cp = sigabbrev_np(signo);
+	if (cp != NULL) {
+	    /* On macOS sys_signame[] may contain lower-case names. */
+	    if (strcasecmp(signame, cp) == 0) {
+		*result = signo;
+		return 0;
+	    }
+	}
+    }
+
+    errno = EINVAL;
+    return -1;
+}
+#endif /* HAVE_STR2SIG */