UNIX编程(10)-信号

1.signal函数

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*restrict act, struct sigaction *restrict oact);

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Returns: 0 if OK, 1 on error

struct sigaction {
?????? void????? (*sa_handler)(int);?? /* addr of signal handler, */
?????????????????????????????????????? /* or SIG_IGN, or SIG_DFL */
?????? sigset_t sa_mask;?????????????? /* additional signals to block */
?????? int????? sa_flags;????????????? /* signal options, Figure 10.16 */

?????? /* alternate handler */
?????? void???? (*sa_sigaction)(int, siginfo_t *, void *);
??? };
11.sigsetjmp和siglongjmp函数

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#include <setjmp.h>int sigsetjmp(sigjmp_buf env, int savemask);

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Returns: 0 if called directly, nonzero if returning from a call to siglongjmp

void siglongjmp(sigjmp_buf env, int val);

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12.sigsuspend函数

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#include <signal.h>int sigsuspend(const sigset_t *sigmask);

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Returns: 1 with errno set to EINTR

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?13.abort函数

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#include <stdlib.h>void abort(void);

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This function never returns

14.system函数

15.sleep函数

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#include <unistd.h>unsigned int sleep(unsigned int seconds);

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Returns: 0 or number of unslept seconds

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16.其他函数

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#include <signal.h>void psignal(int signo, const char *msg);

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#include <string.h>char *strsignal(int signo);

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Returns: a pointer to a string describing the signal

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#include <signal.h>int sig2str(int signo, char *str);int str2sig(const char *str, int *signop);

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Both return: 0 if OK, 1 on error

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