0b0b1ab43c
* fsusage.c: (_glibtop_get_fsusage_read_write), (glibtop_get_fsusage_s): * mountlist.c: (glibtop_get_mountlist_s): Back to previous version. * fsusage.c: (linux_2_6_0), (linux_2_4_0), (_glibtop_linux_get_fsusage_read_write): Back to previous version. Now set .flags correctly.
106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
#include <glibtop.h>
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#include <glibtop/fsusage.h>
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#include <glib.h>
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#include <mntent.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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void _glibtop_linux_get_fsusage_read_write(glibtop *server,
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glibtop_fsusage *buf,
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const char *path);
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/*
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* Linux 2.6.x
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* linux/Documentation/iostats.txt
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*/
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static void linux_2_6_0(glibtop *server, glibtop_fsusage *buf, const char *path)
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{
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FILE *mtab = setmntent("/etc/mtab", "r");
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struct mntent *emnt;
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while((emnt = getmntent(mtab)) != NULL)
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{
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if(strcmp(emnt->mnt_dir, path) == 0)
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{
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char filename[64]; /* magic */
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char buffer[1024]; /* magic */
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char *p;
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char device[32]; /* magic */
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unsigned partition;
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const char *devname = emnt->mnt_fsname;
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size_t offset;
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/*
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we only deal with /dev block devices "/dev/<DEVICE><PARTITION>"
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i don't know if other block devices such as network block
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devices provide this kind of information.
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*/
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if(!g_str_has_prefix(devname, "/dev/"))
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break;
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/* skip the "/dev/" */
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devname += sizeof "/dev/" - 1;
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g_strlcpy(device, devname, sizeof device);
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offset = strcspn(devname, "0123456789");
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partition = strtoul(devname + offset, NULL, 0);
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device[offset] = '\0';
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if((size_t) g_snprintf(filename, sizeof filename,
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"/sys/block/%s/%s%u/stat",
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device, device, partition) >= sizeof filename)
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break;
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if(try_file_to_buffer(buffer, filename) < 0)
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break;
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p = buffer;
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p = skip_token(p);
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buf->read = strtoull(p, &p, 0);
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p = skip_token(p);
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buf->write = strtoull(p, &p, 0);
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buf->flags |= (1 << GLIBTOP_FSUSAGE_READ) | (1 << GLIBTOP_FSUSAGE_WRITE);
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break;
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}
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}
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endmntent(mtab);
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}
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static void linux_2_4_0(glibtop *server, glibtop_fsusage *buf, const char *path)
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{
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}
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void _glibtop_linux_get_fsusage_read_write(glibtop *server,
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glibtop_fsusage *buf,
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const char *path)
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{
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if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
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{
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linux_2_6_0(server, buf, path);
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}
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else if(server->os_version_code >= LINUX_VERSION_CODE(2, 4, 0))
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{
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linux_2_4_0(server, buf, path);
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}
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}
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