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| 2 |
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| 3 | /*******************************************************************************
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| 4 | * Header Files *
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| 5 | *******************************************************************************/
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| 6 | #define _BSD_SOURCE
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| 7 | #define _GNU_SOURCE
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| 8 | #include <sys/time.h>
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| 9 | #include <sys/stat.h>
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| 10 | #include <fcntl.h>
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| 11 | #include <time.h>
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| 12 | #include <stdio.h>
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| 13 | #include <string.h>
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| 14 | #include <errno.h>
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| 15 | #include <pthread.h>
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| 16 | #include <signal.h>
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| 17 | #include <unistd.h>
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| 18 |
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| 19 |
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| 20 | /*******************************************************************************
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| 21 | * Global Variables *
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| 22 | *******************************************************************************/
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| 23 | /** The number of signals. */
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| 24 | static volatile long g_cSigs = 0;
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| 25 | /** Number of signals received on threads other than the main one. */
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| 26 | static volatile long g_cSigsOther = 0;
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| 27 | /** Whether to shutdown or not. */
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| 28 | static volatile int g_fShutdown = 0;
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| 29 | /** The handle of the main thread. */
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| 30 | static pthread_t g_hMainThread;
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| 31 |
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| 32 |
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| 33 | static void SigHandler(int iSig)
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| 34 | {
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| 35 | g_cSigs++;
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| 36 | if (pthread_self() != g_hMainThread)
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| 37 | g_cSigsOther++;
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| 38 |
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| 39 | (void)iSig;
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| 40 | }
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| 41 |
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| 42 |
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| 43 | static void NanoSleep(unsigned long cNanoSecs)
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| 44 | {
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| 45 | struct timespec Ts;
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| 46 | Ts.tv_sec = 0;
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| 47 | Ts.tv_nsec = cNanoSecs;
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| 48 | nanosleep(&Ts, NULL);
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| 49 | }
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| 50 |
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| 51 |
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| 52 | static void *ThreadProc(void *pvIgnored)
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| 53 | {
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| 54 | int volatile i = 0;
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| 55 | while (!g_fShutdown)
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| 56 | {
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| 57 | // NanoSleep(850);
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| 58 | if (g_fShutdown)
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| 59 | break;
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| 60 |
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| 61 | pthread_kill(g_hMainThread, SIGALRM);
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| 62 | for (i = 6666; i > 0; i--)
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| 63 | /* nothing */;
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| 64 | }
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| 65 | return NULL;
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| 66 | }
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| 67 |
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| 68 |
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| 69 | int main(int argc, char **argv)
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| 70 | {
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| 71 | void (*rcSig)(int);
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| 72 | pthread_t hThread;
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| 73 | char szName[1024];
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| 74 | int i;
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| 75 | int rc;
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| 76 |
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| 77 | /*
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| 78 | * Set up the signal handlers.
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| 79 | */
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| 80 | rcSig = bsd_signal(SIGALRM, SigHandler);
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| 81 | if (rcSig != SIG_ERR)
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| 82 | rcSig = bsd_signal(SIGCHLD, SigHandler);
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| 83 | if (rcSig == SIG_ERR)
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| 84 | {
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| 85 | fprintf(stderr, "bsd_signal failed: %s\n", strerror(errno));
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| 86 | return 1;
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| 87 | }
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| 88 | if (argc == 2) /* testing... */
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| 89 | {
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| 90 | siginterrupt(SIGALRM, 1);
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| 91 | siginterrupt(SIGCHLD, 1);
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| 92 | }
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| 93 |
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| 94 | /*
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| 95 | * Kick off a thread that will signal us like there was no tomorrow.
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| 96 | */
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| 97 | g_hMainThread = pthread_self();
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| 98 | rc = pthread_create(&hThread, NULL, ThreadProc, NULL);
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| 99 | if (rc != 0)
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| 100 | {
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| 101 | fprintf(stderr, "pthread_create failed: %s\n", strerror(rc));
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| 102 | return 1;
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| 103 | }
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| 104 |
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| 105 | /*
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| 106 | * Do path related stuff.
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| 107 | */
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| 108 | snprintf(szName, sizeof(szName), "%s-test2", argv[0]);
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| 109 | for (i = 0; i < 100*1000*1000; i++)
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| 110 | {
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| 111 | struct stat St;
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| 112 | int fd;
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| 113 |
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| 114 | rc = stat(argv[0], &St);
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| 115 | if (rc == 0 || errno != EINTR)
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| 116 | rc = stat(szName, &St);
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| 117 | if (errno == EINTR && rc != 0)
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| 118 | {
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| 119 | printf("iteration %d: stat: %u\n", i, errno);
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| 120 | break;
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| 121 | }
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| 122 |
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| 123 | fd = open(szName, O_CREAT | O_RDWR, 0666);
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| 124 | if (errno == EINTR && fd < 0)
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| 125 | {
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| 126 | printf("iteration %d: open: %u\n", i, errno);
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| 127 | break;
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| 128 | }
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| 129 | close(fd);
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| 130 | rc = unlink(szName);
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| 131 | if (errno == EINTR && rc != 0)
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| 132 | {
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| 133 | printf("iteration %d: unlink: %u\n", i, errno);
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| 134 | break;
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| 135 | }
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| 136 |
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| 137 | /* Show progress info */
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| 138 | if ((i % 100000) == 0)
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| 139 | {
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| 140 | printf(".");
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| 141 | if ((i % 1000000) == 0)
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| 142 | printf("[%d/%ld/%ld]\n", i, g_cSigs, g_cSigsOther);
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| 143 | fflush(stdout);
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| 144 | }
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| 145 | }
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| 146 |
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| 147 | g_fShutdown = 1;
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| 148 | if (rc)
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| 149 | printf("No EINTR in %d iterations - system is working nicely!\n", i);
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| 150 | NanoSleep(10000000);
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| 151 |
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| 152 | return rc ? 1 : 0;
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| 153 | }
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| 154 |
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