125 or the tag would make the total length of the option
126 string for the mounted file system too long.
127
128
129 EPERM
130 The calling process does not have {PRIV_SYS_MOUNT}
131 privilege and either a MNTIOC_SETTAG or MNTIOC_CLRTAG
132 call was made.
133
134
135 FILES
136 /etc/mnttab
137 Usual mount point for mnttab file system
138
139
140 /usr/include/sys/mntio.h
141 Header file that contains IOCTL definitions
142
143
144 SEE ALSO
145 mkfile(1M), mount_cachefs(1M), mount_hsfs(1M), mount_nfs(1M),
146 mount_pcfs(1M), mount_ufs(1M), mount(1M), ioctl(2), read(2), poll(2),
147 stat(2), getmntent(3C)
148
149 WARNINGS
150 The mnttab file system provides the previously undocumented dev=xxx
151 option in the option string for each mounted file system. This is
152 provided for legacy applications that might have been using the
153 dev=information option.
154
155
156 Using dev=option in applications is strongly discouraged. The device
157 number string represents a 32-bit quantity and might not contain
158 correct information in 64-bit environments.
159
160
161 Applications requiring device number information for mounted file
162 systems should use the getextmntent(3C) interface, which functions
163 properly in either 32- or 64-bit environments.
164
165 NOTES
166 The snapshot of the mnttab information is taken any time a read(2) is
167 performed at offset 0 (the beginning) of the mnttab file. The file
168 modification time returned by stat(2) for the mnttab file is the time
169 of the last change to mounted file system information. A poll(2) system
170 call requesting a POLLRDBAND event can be used to block and wait for
171 the system's mounted file system information to be different from the
172 most recent snapshot since the mnttab file was opened.
173
174
175
176 December 20, 2003 MNTTAB(4)
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125 or the tag would make the total length of the option
126 string for the mounted file system too long.
127
128
129 EPERM
130 The calling process does not have {PRIV_SYS_MOUNT}
131 privilege and either a MNTIOC_SETTAG or MNTIOC_CLRTAG
132 call was made.
133
134
135 FILES
136 /etc/mnttab
137 Usual mount point for mnttab file system
138
139
140 /usr/include/sys/mntio.h
141 Header file that contains IOCTL definitions
142
143
144 SEE ALSO
145 mkfile(1M), mount_hsfs(1M), mount_nfs(1M), mount_pcfs(1M),
146 mount_ufs(1M), mount(1M), ioctl(2), read(2), poll(2), stat(2),
147 getmntent(3C)
148
149 WARNINGS
150 The mnttab file system provides the previously undocumented dev=xxx
151 option in the option string for each mounted file system. This is
152 provided for legacy applications that might have been using the
153 dev=information option.
154
155
156 Using dev=option in applications is strongly discouraged. The device
157 number string represents a 32-bit quantity and might not contain
158 correct information in 64-bit environments.
159
160
161 Applications requiring device number information for mounted file
162 systems should use the getextmntent(3C) interface, which functions
163 properly in either 32- or 64-bit environments.
164
165 NOTES
166 The snapshot of the mnttab information is taken any time a read(2) is
167 performed at offset 0 (the beginning) of the mnttab file. The file
168 modification time returned by stat(2) for the mnttab file is the time
169 of the last change to mounted file system information. A poll(2) system
170 call requesting a POLLRDBAND event can be used to block and wait for
171 the system's mounted file system information to be different from the
172 most recent snapshot since the mnttab file was opened.
173
174
175
176 September 8, 2015 MNTTAB(4)
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