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cl349@firebug.cl.cam.ac.uk
c2bf763b7f
1) make xenconsoled exit gracefully if xcs dies 2) daemonize xenstored before binding to xenstored socket 3) wait to close stdio in xenstored until we're ready to accept connections (so that PID=`xenstored --output-pid` doesn't return until it's ready to accept connections) 4) updates tools/misc/xend for these changes Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustycorp.com.au> Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
118 lines
1.9 KiB
C
118 lines
1.9 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <signal.h>
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#include "utils.h"
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void xprintf(const char *fmt, ...)
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{
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static FILE *out = NULL;
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va_list args;
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if (!out)
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out = stderr;
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va_start(args, fmt);
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vfprintf(out, fmt, args);
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va_end(args);
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fflush(out);
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}
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void barf(const char *fmt, ...)
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{
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char *str;
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va_list arglist;
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xprintf("FATAL: ");
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va_start(arglist, fmt);
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vasprintf(&str, fmt, arglist);
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va_end(arglist);
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xprintf("%s\n", str);
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free(str);
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exit(1);
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}
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void barf_perror(const char *fmt, ...)
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{
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char *str;
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int err = errno;
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va_list arglist;
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xprintf("FATAL: ");
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va_start(arglist, fmt);
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vasprintf(&str, fmt, arglist);
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va_end(arglist);
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xprintf("%s: %s\n", str, strerror(err));
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free(str);
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exit(1);
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}
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void *_realloc_array(void *ptr, size_t size, size_t num)
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{
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if (num >= SIZE_MAX/size)
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return NULL;
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return realloc_nofail(ptr, size * num);
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}
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void *realloc_nofail(void *ptr, size_t size)
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{
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ptr = realloc(ptr, size);
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if (ptr)
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return ptr;
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barf("realloc of %zu failed", size);
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}
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void *malloc_nofail(size_t size)
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{
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void *ptr = malloc(size);
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if (ptr)
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return ptr;
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barf("malloc of %zu failed", size);
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}
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/* This version adds one byte (for nul term) */
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void *grab_file(const char *filename, unsigned long *size)
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{
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unsigned int max = 16384;
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int ret, fd;
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void *buffer;
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if (streq(filename, "-"))
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fd = dup(STDIN_FILENO);
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else
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fd = open(filename, O_RDONLY, 0);
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if (fd < 0)
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return NULL;
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buffer = malloc(max+1);
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*size = 0;
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while ((ret = read(fd, buffer + *size, max - *size)) > 0) {
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*size += ret;
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if (*size == max)
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buffer = realloc(buffer, max *= 2 + 1);
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}
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if (ret < 0) {
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free(buffer);
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buffer = NULL;
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} else
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((char *)buffer)[*size] = '\0';
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close(fd);
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return buffer;
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}
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void release_file(void *data, unsigned long size __attribute__((unused)))
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{
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free(data);
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}
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