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Fix handling of real-time signals.

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This commit is contained in:
Todd C. Miller
2019-08-19 08:36:30 -06:00
parent 9f7db2df2c
commit 29534ad96a
2 changed files with 39 additions and 13 deletions
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35
lib/util/str2sig.c
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@@ -36,8 +36,9 @@
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif /* HAVE_STRINGS_H */
#include <signal.h>
#include <ctype.h>
#include <signal.h>
#include <unistd.h>
#include "sudo_compat.h"
@@ -117,9 +118,14 @@ sudo_str2sig(const char *signame, int *result)
return 0;
}
if (signame[5] == '+') {
if (signame[6] == '1' || signame[6] == '2' || signame[6] == '3') {
*result = SIGRTMIN + (signame[6] - '0');
return 0;
if (isdigit((unsigned char)signame[6])) {
const long rtmax = sysconf(_SC_RTSIG_MAX);
const int off = signame[6] - '0';
if (rtmax > 0 && off < rtmax / 2) {
*result = SIGRTMIN + off;
return 0;
}
}
}
}
@@ -131,9 +137,14 @@ sudo_str2sig(const char *signame, int *result)
return 0;
}
if (signame[5] == '-') {
if (signame[6] == '1' || signame[6] == '2' || signame[6] == '3') {
*result = SIGRTMAX - (signame[6] - '0');
return 0;
if (isdigit((unsigned char)signame[6])) {
const long rtmax = sysconf(_SC_RTSIG_MAX);
const int off = signame[6] - '0';
if (rtmax > 0 && off < rtmax / 2) {
*result = SIGRTMAX - off;
return 0;
}
}
}
}
@@ -141,10 +152,12 @@ sudo_str2sig(const char *signame, int *result)
break;
}
for (signo = 0; signo < NSIG; signo++) {
if (strcmp(signame, sudo_sys_signame[signo]) == 0) {
*result = signo;
return 0;
for (signo = 1; signo < NSIG; signo++) {
if (sudo_sys_signame[signo] != NULL) {
if (strcmp(signame, sudo_sys_signame[signo]) == 0) {
*result = signo;
return 0;
}
}
}