C++ seq_putc函数代码示例

static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
{
	int i;

	seq_printf(seq, "%3d %-8s", dev->number, dev->type);
	for (i = 0; i < ESI_LEN; i++)
		seq_printf(seq, "%02x", dev->esi[i]);
	seq_puts(seq, "  ");
	add_stats(seq, "0", &dev->stats.aal0);
	seq_puts(seq, "  ");
	add_stats(seq, "5", &dev->stats.aal5);
	seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
	seq_putc(seq, '\n');
}

int show_interrupts(struct seq_file *p, void *v)
{
	int i = *(loff_t *) v, j;
	struct irqaction * action;
	unsigned long flags;

	if (i == 0) {
		seq_printf(p, "           ");
		for_each_online_cpu(j)
			seq_printf(p, "CPU%d       ",j);
		seq_putc(p, '\n');
	}

	if (i < NR_IRQS) {
		raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
		action = irq_desc[i].action;
		if (!action)
			goto skip;
		seq_printf(p, "%3d: ",i);
#ifndef CONFIG_SMP
		seq_printf(p, "%10u ", kstat_irqs(i));
#else
		for_each_online_cpu(j)
			seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
#endif
		seq_printf(p, " %14s", irq_desc[i].chip->name);
		seq_printf(p, "  %s", action->name);

		for (action=action->next; action; action = action->next)
			seq_printf(p, ", %s", action->name);

		seq_putc(p, '\n');
skip:
		raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
	}
	return 0;
}

int show_interrupts(struct seq_file *p, void *v)
{
	int i = *(loff_t *) v, j;
	struct irqaction * action;
	unsigned long flags;

	if (i == 0) {
		seq_printf(p, "           ");
		for (j=0; j<NR_CPUS; j++)
			if (cpu_online(j))
				seq_printf(p, "CPU%d       ",j);
		seq_putc(p, '\n');
	}

	if (i < NR_IRQS) {
		spin_lock_irqsave(&irq_desc[i].lock, flags);
		action = irq_desc[i].action;
		if (!action) 
			goto skip;
		seq_printf(p, "%3d: ",i);
#ifndef CONFIG_SMP
		seq_printf(p, "%10u ", kstat_irqs(i));
#else
		for (j = 0; j < NR_CPUS; j++)
			if (cpu_online(j))
				seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
		seq_printf(p, " %14s", irq_desc[i].handler->typename);
		seq_printf(p, "  %s", action->name);

		for (action=action->next; action; action = action->next)
			seq_printf(p, ", %s", action->name);

		seq_putc(p, '\n');
skip:
		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
	} else if (i == NR_IRQS) {

static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
{
	unsigned long buff[TCPUDP_MIB_MAX];
	struct net *net = seq->private;
	int i;

	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));

	seq_puts(seq, "\nTcp:");
	for (i = 0; snmp4_tcp_list[i].name; i++)
		seq_printf(seq, " %s", snmp4_tcp_list[i].name);

	seq_puts(seq, "\nTcp:");
	snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
				 net->mib.tcp_statistics);
	for (i = 0; snmp4_tcp_list[i].name; i++) {
		/* MaxConn field is signed, RFC 2012 */
		if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
			seq_printf(seq, " %ld", buff[i]);
		else
			seq_printf(seq, " %lu", buff[i]);
	}

	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));

	snmp_get_cpu_field_batch(buff, snmp4_udp_list,
				 net->mib.udp_statistics);
	seq_puts(seq, "\nUdp:");
	for (i = 0; snmp4_udp_list[i].name; i++)
		seq_printf(seq, " %s", snmp4_udp_list[i].name);
	seq_puts(seq, "\nUdp:");
	for (i = 0; snmp4_udp_list[i].name; i++)
		seq_printf(seq, " %lu", buff[i]);

	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));

	/* the UDP and UDP-Lite MIBs are the same */
	seq_puts(seq, "\nUdpLite:");
	snmp_get_cpu_field_batch(buff, snmp4_udp_list,
				 net->mib.udplite_statistics);
	for (i = 0; snmp4_udp_list[i].name; i++)
		seq_printf(seq, " %s", snmp4_udp_list[i].name);
	seq_puts(seq, "\nUdpLite:");
	for (i = 0; snmp4_udp_list[i].name; i++)
		seq_printf(seq, " %lu", buff[i]);

	seq_putc(seq, '\n');
	return 0;
}

static void seq_print_vma_name(struct seq_file *m, struct vm_area_struct *vma)
{
	const char __user *name = vma_get_anon_name(vma);
	struct mm_struct *mm = vma->vm_mm;

	unsigned long page_start_vaddr;
	unsigned long page_offset;
	unsigned long num_pages;
	unsigned long max_len = NAME_MAX;
	int i;

	page_start_vaddr = (unsigned long)name & PAGE_MASK;
	page_offset = (unsigned long)name - page_start_vaddr;
	num_pages = DIV_ROUND_UP(page_offset + max_len, PAGE_SIZE);

	seq_puts(m, "[anon:");

	for (i = 0; i < num_pages; i++) {
		int len;
		int write_len;
		const char *kaddr;
		long pages_pinned;
		struct page *page;

		pages_pinned = get_user_pages(current, mm, page_start_vaddr,
				1, 0, 0, &page, NULL);
		if (pages_pinned < 1) {
			seq_puts(m, "<fault>]");
			return;
		}

		kaddr = (const char *)kmap(page);
		len = min(max_len, PAGE_SIZE - page_offset);
		write_len = strnlen(kaddr + page_offset, len);
		seq_write(m, kaddr + page_offset, write_len);
		kunmap(page);
		put_page(page);

		/* if strnlen hit a null terminator then we're done */
		if (write_len != len)
			break;

		max_len -= len;
		page_offset = 0;
		page_start_vaddr += PAGE_SIZE;
	}

	seq_putc(m, ']');
}

/** Show callback for the @c mem_profile debugfs file.
 *
 * This function is called to get the contents of the @c mem_profile debugfs
 * file. This is a report of current memory usage and distribution in userspace.
 *
 * @param sfile The debugfs entry
 * @param data Data associated with the entry
 *
 * @return 0 if successfully prints data in debugfs entry file
 *         -1 if it encountered an error
 */
static int kbasep_mem_profile_seq_show(struct seq_file *sfile, void *data)
{
	struct kbase_context *kctx = sfile->private;

	KBASE_DEBUG_ASSERT(kctx != NULL);

	spin_lock(&kctx->mem_profile_lock);
	if (kctx->mem_profile_data) {
		seq_write(sfile, kctx->mem_profile_data, kctx->mem_profile_size);
		seq_putc(sfile, '\n');
	}
	spin_unlock(&kctx->mem_profile_lock);

	return 0;
}

int show_interrupts(struct seq_file *p, void *v)
{
	int i = *(loff_t *) v, j;
	struct irqaction * action;
	unsigned long flags;

	if (i == 0) {
		char cpuname[16];
		seq_printf(p, "     ");
		for_each_online_cpu(j) {
			snprintf(cpuname, 10, "CPU%d", j);
			seq_printf(p, "%10s ", cpuname);
		}
		seq_putc(p, '\n');
	}

static int proc_seq_show(struct seq_file *s, void *v)
{
	printk("show\n");
	//return 0;
	tmp_v = ((struct task_struct *)v);
	
	int i=0;
	for(i=0;i<30;i++)
	{
		seq_printf(s, "%d,%30s", tmp_v->pid,tmp_v->comm);
	
		seq_putc(s, '\n');
	}
	return 0;
}

static int exp_seq_show(struct seq_file *s, void *v)
{
	struct ip_conntrack_expect *expect = v;

	if (expect->timeout.function)
		seq_printf(s, "%lu ", timer_pending(&expect->timeout)
			   ? (expect->timeout.expires - jiffies)/HZ : 0);
	else
		seq_printf(s, "- ");

	seq_printf(s, "proto=%u ", expect->tuple.dst.protonum);

	print_tuple(s, &expect->tuple,
		    ip_ct_find_proto(expect->tuple.dst.protonum));
	return seq_putc(s, '\n');
}

int show_interrupts(struct seq_file *p, void *v)
{
	int i = *(loff_t *) v, cpu;
	struct irqaction * action;
	unsigned long flags;

	if (i == 0) {
		char cpuname[12];

		seq_printf(p, "    ");
		for_each_present_cpu(cpu) {
			sprintf(cpuname, "CPU%d", cpu);
			seq_printf(p, " %10s", cpuname);
		}
		seq_putc(p, '\n');
	}

static inline void task_name(struct seq_file *m, struct task_struct *p)
{
	char *buf;
	size_t size;
	char tcomm[sizeof(p->comm)];
	int ret;

	get_task_comm(tcomm, p);

	seq_puts(m, "Name:\t");

	size = seq_get_buf(m, &buf);
	ret = string_escape_str(tcomm, buf, size, ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
	seq_commit(m, ret < size ? ret : -1);

	seq_putc(m, '\n');
}

static inline void task_name(struct seq_file *m, struct task_struct *p)
{
	char *buf;
	char tcomm[sizeof(p->comm)];

	get_task_comm(tcomm, p);

	seq_puts(m, "Name:\t");
	buf = m->buf + m->count;

	/* Ignore error for now */
	string_escape_str(tcomm, &buf, m->size - m->count,
			  ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");

	m->count = buf - m->buf;
	seq_putc(m, '\n');
}

int arch_show_interrupts(struct seq_file *p, int prec)
{
	int j;

#ifdef CONFIG_SMP
	seq_puts(p, "IPI: ");
	for_each_online_cpu(j)
		seq_printf(p, "%10lu ", cpu_data[j].ipi_count);
	seq_putc(p, '\n');
#endif
	seq_puts(p, "PMI: ");
	for_each_online_cpu(j)
		seq_printf(p, "%10lu ", per_cpu(irq_pmi_count, j));
	seq_puts(p, "          Performance Monitoring\n");
	seq_printf(p, "ERR: %10lu\n", irq_err_count);
	return 0;
}

/*
 * This is handler for /proc/consoles
 */
static int show_console_dev(struct seq_file *m, void *v)
{
	static const struct {
		short flag;
		char name;
	} con_flags[] = {
		{ CON_ENABLED,		'E' },
		{ CON_CONSDEV,		'C' },
		{ CON_BOOT,		'B' },
		{ CON_PRINTBUFFER,	'p' },
		{ CON_BRL,		'b' },
		{ CON_ANYTIME,		'a' },
	};
	char flags[ARRAY_SIZE(con_flags) + 1];
	struct console *con = v;
	unsigned int a;
	dev_t dev = 0;

	if (con->device) {
		const struct tty_driver *driver;
		int index;
		driver = con->device(con, &index);
		if (driver) {
			dev = MKDEV(driver->major, driver->minor_start);
			dev += index;
		}
	}

	for (a = 0; a < ARRAY_SIZE(con_flags); a++)
		flags[a] = (con->flags & con_flags[a].flag) ?
			con_flags[a].name : ' ';
	flags[a] = 0;

	seq_setwidth(m, 21 - 1);
	seq_printf(m, "%s%d", con->name, con->index);
	seq_pad(m, ' ');
	seq_printf(m, "%c%c%c (%s)", con->read ? 'R' : '-',
			con->write ? 'W' : '-', con->unblank ? 'U' : '-',
			flags);
	if (dev)
		seq_printf(m, " %4d:%d", MAJOR(dev), MINOR(dev));

	seq_putc(m, '\n');
	return 0;
}

static int c_show(struct seq_file *m, void *p)
{
	struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
	
	seq_printf(m, "name         : %s\n", alg->cra_name);
	seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
	seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
	seq_printf(m, "priority     : %d\n", alg->cra_priority);
	seq_printf(m, "refcnt       : %d\n", atomic_read(&alg->cra_refcnt));
	seq_printf(m, "selftest     : %s\n",
		   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
		   "passed" : "unknown");

	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
		seq_printf(m, "type         : larval\n");
		seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
		goto out;
	}

	if (alg->cra_type && alg->cra_type->show) {
		alg->cra_type->show(m, alg);
		goto out;
	}
	
	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
	case CRYPTO_ALG_TYPE_CIPHER:
		seq_printf(m, "type         : cipher\n");
		seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
		seq_printf(m, "min keysize  : %u\n",
					alg->cra_cipher.cia_min_keysize);
		seq_printf(m, "max keysize  : %u\n",
					alg->cra_cipher.cia_max_keysize);
		break;
	case CRYPTO_ALG_TYPE_COMPRESS:
		seq_printf(m, "type         : compression\n");
		break;
	default:
		seq_printf(m, "type         : unknown\n");
		break;
	}

out:
	seq_putc(m, '\n');
	return 0;
}