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utils: add lxc_safe_long()

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Signed-off-by: Christian Brauner <christian.brauner@canonical.com>
This commit is contained in:
Christian Brauner 2016-10-29 12:39:36 +02:00
parent 0406409813
commit 8c57d93034
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GPG Key ID: 8EB056D53EECB12D
2 changed files with 22 additions and 1 deletions
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22
src/lxc/utils.c
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@ -2007,7 +2007,7 @@ int lxc_safe_uint(const char *numstr, unsigned int *converted)
if (uli > UINT_MAX) if (uli > UINT_MAX)
return -ERANGE; return -ERANGE;
*converted = (unsigned)uli; *converted = (unsigned int)uli;
return 0; return 0;
} }
@ -2030,3 +2030,23 @@ int lxc_safe_int(const char *numstr, int *converted)
*converted = (int)sli; *converted = (int)sli;
return 0; return 0;
} }
int lxc_safe_long(const char *numstr, long int *converted)
{
char *err = NULL;
signed long int sli;
errno = 0;
sli = strtol(numstr, &err, 0);
if (errno > 0)
return -errno;
if (!err || err == numstr || *err != '\0')
return -EINVAL;
if (sli > LONG_MAX)
return -ERANGE;
*converted = sli;
return 0;
}

1
src/lxc/utils.h
View File

@ -320,5 +320,6 @@ bool task_blocking_signal(pid_t pid, int signal);
/* Helper functions to parse numbers. */ /* Helper functions to parse numbers. */
int lxc_safe_uint(const char *numstr, unsigned int *converted); int lxc_safe_uint(const char *numstr, unsigned int *converted);
int lxc_safe_int(const char *numstr, int *converted); int lxc_safe_int(const char *numstr, int *converted);
int lxc_safe_long(const char *numstr, long int *converted);
#endif /* __LXC_UTILS_H */ #endif /* __LXC_UTILS_H */