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https://gitee.com/acl-dev/acl.git
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62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
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#include "stdafx.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <strings.h>
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/* Process manager. */
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#include "trigger.h"
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/* acl_fifo_trigger - wakeup fifo server */
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int acl_fifo_trigger(ACL_EVENT *eventp_unused acl_unused, const char *service,
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const char *buf, int len, int timeout)
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{
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const char *myname = "acl_fifo_trigger";
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static ACL_VSTRING *why;
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ACL_VSTREAM *fp;
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int fd;
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if (why == 0)
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why = acl_vstring_alloc(1);
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/*
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* Write the request to the service fifo. According to POSIX, the open
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* shall always return immediately, and shall return an error when no
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* process is reading from the FIFO.
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*
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* Use safe_open() so that we don't follow symlinks, and so that we don't
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* open files with multiple hard links. We're not (yet) going to bother
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* the caller with safe_open() specific quirks such as the why argument.
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*/
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if ((fp = acl_safe_open(service, O_WRONLY | O_NONBLOCK, 0,
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(struct stat *) 0, (uid_t) -1, (uid_t) -1, why)) == 0) {
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if (acl_msg_verbose)
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acl_msg_info("%s: open %s: %s",
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myname, service, acl_vstring_str(why));
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return -1;
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}
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fd = ACL_VSTREAM_FILE(fp);
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/*
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* Write the request...
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*/
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acl_non_blocking(fd, timeout > 0 ? ACL_NON_BLOCKING : ACL_BLOCKING);
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if (acl_write_buf(fd, buf, len, timeout) < 0 && acl_msg_verbose)
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acl_msg_warn("%s: write %s: %s",
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myname, service, strerror(errno));
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/*
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* Disconnect.
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*/
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if (acl_vstream_fclose(fp) && acl_msg_verbose)
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acl_msg_warn("%s: close %s: %s",
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myname, service, strerror(errno));
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return 0;
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}
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