mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-27 14:58:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Make signal handling work well across platforms

Browse source 
- Fix sigsuspend() on XNU
- Fix strsignal() on non-Linux
- Add unit tests for strsignal()
- Add unit tests for setitimer()
- Add unit tests for sigsuspend()
- Rewrite setitimer() for New Technology
- Rewrite nanosleep() for New Technology
- Polyfill SIGALRM on the New Technology
- select(0,0,0,0) on NT now calls pause()
- Remove some NTDLL calls that aren't needed
- Polyfill SA_NOCLDWAIT on the New Technology
- Polyfill SA_RESETHAND on the New Technology
- Polyfill sigprocmask() on the New Technology
- Polyfill SIGCHLD+SIG_IGN on the New Technology
- Polyfill SA_RESTART masking on the New Technology
- Deliver console signals from main thread on New Technology
- Document SA_RESTART behavior w/ @sarestartable / @norestart
- System call trace in MODE=dbg now prints inherited FDs and signal mask
This commit is contained in:
Justine Tunney 2022-03-25 07:11:44 -07:00
parent 3b9e66ecba
commit 072e1d2910
82 changed files with 1388 additions and 450 deletions
Download patch file Download diff file Expand all files Collapse all files

44
libc/str/strsignal.c
View file

@ -20,28 +20,42 @@
#include "libc/macros.internal.h"
#include "libc/str/str.h"
static const char kSig[4] = "SIG";
static const char kUnknown[8] = "UNKNOWN";
extern const struct { int x, s; } kStrSignal[];
_Alignas(char) static const char kStrSignals[][8] = {
"EXIT", "HUP", "INT", "QUIT", "ILL", "TRAP", "ABRT", "BUS",
"FPE", "KILL", "USR1", "SEGV", "USR2", "PIPE", "ALRM", "TERM",
"STKFLT", "CHLD", "CONT", "STOP", "TSTP", "TTIN", "TTOU", "URG",
"XCPU", "XFSZ", "VTALRM", "PROF", "WINCH", "IO", "PWR", "SYS",
};
static char g_strsignal[4 + 8];
static char g_strsignal[12];
/**
* Returns name associated with signal code.
* Returns string describing signal code.
*
* This returns SIGUNKNOWN for 0 which is the empty value. Textual names
* should be available for signals 1 through 32. Signals in the range 33
* and 128 are returned as a `SIG%03d` string. Everything else is SIGWUT
*
* @param sig is signal number which should be in range 1 through 128
* @return pointer to static memory that mutates on subsequent calls
* @see sigaction()
*/
char *strsignal(int sig) {
if (0 <= sig && sig < ARRAYLEN(kStrSignals)) {
memcpy(g_strsignal, kSig, 4);
memcpy(&g_strsignal[3], kStrSignals[sig], 8);
int i;
strcpy(g_strsignal, "SIG");
if (sig) {
for (i = 0; kStrSignal[i].x; ++i) {
if (sig == *(const int *)((uintptr_t)kStrSignal + kStrSignal[i].x)) {
strcpy(g_strsignal + 3,
(const char *)((uintptr_t)kStrSignal + kStrSignal[i].s));
return g_strsignal;
}
}
}
if (!sig) {
strcpy(g_strsignal + 3, "UNKNOWN");
} else if (1 <= sig && sig <= 128) {
g_strsignal[3] = '0' + sig / 100;
g_strsignal[4] = '0' + sig / 10 % 10;
g_strsignal[5] = '0' + sig % 10;
g_strsignal[6] = 0;
} else {
memcpy(g_strsignal, &kUnknown, 8);
strcpy(g_strsignal + 3, "WUT");
}
return g_strsignal;
}