diff options
Diffstat (limited to 'man3/rand.3')
| -rw-r--r-- | man3/rand.3 | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/man3/rand.3 b/man3/rand.3 index 6146ce9..681a5f7 100644 --- a/man3/rand.3 +++ b/man3/rand.3 @@ -19,7 +19,7 @@ .\" Modified 2003-11-15, aeb, added rand_r .\" 2010-09-13, mtk, added example program .\" -.TH rand 3 2023-07-20 "Linux man-pages 6.05.01" +.TH rand 3 2023-10-31 "Linux man-pages 6.7" .SH NAME rand, rand_r, srand \- pseudo-random number generator .SH LIBRARY @@ -28,18 +28,18 @@ Standard C library .SH SYNOPSIS .nf .B #include <stdlib.h> -.PP +.P .B int rand(void); .BI "void srand(unsigned int " seed ); -.PP +.P .BI "[[deprecated]] int rand_r(unsigned int *" seedp ); .fi -.PP +.P .RS -4 Feature Test Macro Requirements for glibc (see .BR feature_test_macros (7)): .RE -.PP +.P .BR rand_r (): .nf Since glibc 2.24: @@ -53,7 +53,7 @@ The function returns a pseudo-random integer in the range 0 to .B RAND_MAX inclusive (i.e., the mathematical range [0,\ \fBRAND_MAX\fR]). -.PP +.P The .BR srand () function sets its argument as the seed for a new @@ -62,11 +62,11 @@ sequence of pseudo-random integers to be returned by These sequences are repeatable by calling .BR srand () with the same seed value. -.PP +.P If no seed value is provided, the .BR rand () function is automatically seeded with a value of 1. -.PP +.P The function .BR rand () is not reentrant, since it @@ -77,7 +77,7 @@ In order to get reproducible behavior in a threaded application, this state must be made explicit; this can be done using the reentrant function .BR rand_r (). -.PP +.P Like .BR rand (), .BR rand_r () @@ -93,7 +93,7 @@ is called with the same initial value for the integer pointed to by .IR seedp , and that value is not modified between calls, then the same pseudo-random sequence will result. -.PP +.P The value pointed to by the .I seedp argument of @@ -130,7 +130,6 @@ T{ .BR srand () T} Thread safety MT-Safe .TE -.sp 1 .SH VERSIONS The versions of .BR rand () @@ -175,7 +174,7 @@ POSIX.1-2001 gives the following example of an implementation of and .BR srand (), possibly useful when one needs the same sequence on two different machines. -.PP +.P .in +4n .EX static unsigned long next = 1; @@ -191,7 +190,7 @@ void mysrand(unsigned int seed) { } .EE .in -.PP +.P The following program can be used to display the pseudo-random sequence produced by .BR rand () @@ -199,7 +198,7 @@ when given a particular seed. When the seed is .IR \-1 , the program uses a random seed. -.PP +.P .in +4n .\" SRC BEGIN (rand.c) .EX |